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Instana tracer implementation

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This commit is contained in:
Kevin Crawley 2019-02-18 09:52:04 -06:00 committed by Traefiker Bot
parent c2c6aee18a
commit aef24dd74b
43 changed files with 4502 additions and 2 deletions
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28
Gopkg.lock generated
View File

@ -1022,6 +1022,14 @@
revision = "2d474a3089bcfce6b472779be9470a1f0ef3d5e4"
version = "v1.3.7"
[[projects]]
digest = "1:78efd72f12ed0244e5fbe82bd0ecdbaf3e21402ee9176525ef1138a2fc0d3b17"
name = "github.com/instana/go-sensor"
packages = ["."]
pruneopts = "NUT"
revision = "493edb42228321483dd4d59ade71ca93fa89d66b"
version = "1.4.12"
[[projects]]
digest = "1:ac6d01547ec4f7f673311b4663909269bfb8249952de3279799289467837c3cc"
name = "github.com/jmespath/go-jmespath"
@ -1111,6 +1119,14 @@
revision = "d0d31d8ca62fa3f7e4526ca0ce95de81e4ed001e"
version = "v0.5.1"
[[projects]]
digest = "1:8520e78cbe9878f6bf0cfdcfaed5761cd575b3568c260a1c891ac1f5c5c6a726"
name = "github.com/looplab/fsm"
packages = ["."]
pruneopts = "NUT"
revision = "84b5307469f859464403f80919467950a79de1b1"
version = "v0.1.0"
[[projects]]
digest = "1:196b0d7580e898df15a7cc5371cbfe2b8e22904f5c6c883ed5db0130e551c8fb"
name = "github.com/mailgun/minheap"
@ -1327,6 +1343,17 @@
pruneopts = "NUT"
revision = "a52f2342449246d5bcc273e65cbdcfa5f7d6c63c"
[[projects]]
digest = "1:cc405544fecfb5a8e0c409127ef67ce3b91d11143a00121e5b822e4f8eabe7d2"
name = "github.com/opentracing/basictracer-go"
packages = [
".",
"wire",
]
pruneopts = "NUT"
revision = "1b32af207119a14b1b231d451df3ed04a72efebf"
version = "v1.0.0"
[[projects]]
digest = "1:7da29c22bcc5c2ffb308324377dc00b5084650348c2799e573ed226d8cc9faf0"
name = "github.com/opentracing/opentracing-go"
@ -2326,6 +2353,7 @@
"github.com/hashicorp/consul/api",
"github.com/hashicorp/go-version",
"github.com/influxdata/influxdb/client/v2",
"github.com/instana/go-sensor",
"github.com/libkermit/compose/check",
"github.com/libkermit/docker",
"github.com/libkermit/docker-check",

4
Gopkg.toml
View File

@ -255,3 +255,7 @@
[[constraint]]
name = "gopkg.in/DataDog/dd-trace-go.v1"
version = "1.7.0"
[[constraint]]
name = "github.com/instana/go-sensor"
version = "1.4.12"

6
cmd/configuration.go
View File

@ -24,6 +24,7 @@ import (
"github.com/containous/traefik/provider/marathon"
"github.com/containous/traefik/provider/rest"
"github.com/containous/traefik/tracing/datadog"
"github.com/containous/traefik/tracing/instana"
"github.com/containous/traefik/tracing/jaeger"
"github.com/containous/traefik/tracing/zipkin"
"github.com/containous/traefik/types"
@ -114,6 +115,11 @@ func NewTraefikDefaultPointersConfiguration() *TraefikConfiguration {
Debug: false,
PrioritySampling: false,
},
Instana: &instana.Config{
LocalAgentHost: "localhost",
LocalAgentPort: 42699,
LogLevel: "info",
},
}
// default ApiConfiguration

36
config/static/static_config.go
View File

@ -27,6 +27,7 @@ import (
"github.com/containous/traefik/provider/rest"
"github.com/containous/traefik/tls"
"github.com/containous/traefik/tracing/datadog"
"github.com/containous/traefik/tracing/instana"
"github.com/containous/traefik/tracing/jaeger"
"github.com/containous/traefik/tracing/zipkin"
"github.com/containous/traefik/types"
@ -117,12 +118,13 @@ type LifeCycle struct {
// Tracing holds the tracing configuration.
type Tracing struct {
Backend string `description:"Selects the tracking backend ('jaeger','zipkin', 'datadog')." export:"true"`
Backend string `description:"Selects the tracking backend ('jaeger','zipkin','datadog','instana')." export:"true"`
ServiceName string `description:"Set the name for this service" export:"true"`
SpanNameLimit int `description:"Set the maximum character limit for Span names (default 0 = no limit)" export:"true"`
Jaeger *jaeger.Config `description:"Settings for jaeger"`
Zipkin *zipkin.Config `description:"Settings for zipkin"`
DataDog *datadog.Config `description:"Settings for DataDog"`
Instana *instana.Config `description:"Settings for Instana"`
}
// Providers contains providers configuration
@ -244,6 +246,10 @@ func (c *Configuration) initTracing() {
log.Warn("DataDog configuration will be ignored")
c.Tracing.DataDog = nil
}
if c.Tracing.Instana != nil {
log.Warn("Instana configuration will be ignored")
c.Tracing.Instana = nil
}
case zipkin.Name:
if c.Tracing.Zipkin == nil {
c.Tracing.Zipkin = &zipkin.Config{
@ -262,6 +268,10 @@ func (c *Configuration) initTracing() {
log.Warn("DataDog configuration will be ignored")
c.Tracing.DataDog = nil
}
if c.Tracing.Instana != nil {
log.Warn("Instana configuration will be ignored")
c.Tracing.Instana = nil
}
case datadog.Name:
if c.Tracing.DataDog == nil {
c.Tracing.DataDog = &datadog.Config{
@ -278,6 +288,30 @@ func (c *Configuration) initTracing() {
log.Warn("Jaeger configuration will be ignored")
c.Tracing.Jaeger = nil
}
if c.Tracing.Instana != nil {
log.Warn("Instana configuration will be ignored")
c.Tracing.Instana = nil
}
case instana.Name:
if c.Tracing.Instana == nil {
c.Tracing.Instana = &instana.Config{
LocalAgentHost: "localhost",
LocalAgentPort: 42699,
LogLevel: "info",
}
}
if c.Tracing.Zipkin != nil {
log.Warn("Zipkin configuration will be ignored")
c.Tracing.Zipkin = nil
}
if c.Tracing.Jaeger != nil {
log.Warn("Jaeger configuration will be ignored")
c.Tracing.Jaeger = nil
}
if c.Tracing.DataDog != nil {
log.Warn("DataDog configuration will be ignored")
c.Tracing.DataDog = nil
}
default:
log.Warnf("Unknown tracer %q", c.Tracing.Backend)
return

40
docs/configuration/tracing.md
View File

@ -4,7 +4,7 @@ The tracing system allows developers to visualize call flows in their infrastruc
We use [OpenTracing](http://opentracing.io). It is an open standard designed for distributed tracing.
Traefik supports three tracing backends: Jaeger, Zipkin and DataDog.
Traefik supports four tracing backends: Jaeger, Zipkin, DataDog, and Instana.
## Jaeger
@ -188,3 +188,41 @@ Traefik supports three tracing backends: Jaeger, Zipkin and DataDog.
#
prioritySampling = false
```
## Instana
```toml
# Tracing definition
[tracing]
# Backend name used to send tracing data
#
# Default: "jaeger"
#
backend = "instana"
# Service name used in Instana backend
#
# Default: "traefik"
#
serviceName = "traefik"
[tracing.instana]
# Local Agent Host instructs reporter to send spans to instana-agent at this address
#
# Default: "127.0.0.1"
#
localAgentHost = "127.0.0.1"
# Local Agent port instructs reporter to send spans to the instana-agent at this port
#
# Default: 42699
#
localAgentPort = 42699
# Set Instana tracer log level
#
# Default: info
# Valid values for logLevel field are:
# - error
# - warn
# - debug
# - info
#
logLevel = "info"
```

3
server/server.go
View File

@ -21,6 +21,7 @@ import (
"github.com/containous/traefik/server/middleware"
"github.com/containous/traefik/tracing"
"github.com/containous/traefik/tracing/datadog"
"github.com/containous/traefik/tracing/instana"
"github.com/containous/traefik/tracing/jaeger"
"github.com/containous/traefik/tracing/zipkin"
"github.com/containous/traefik/types"
@ -60,6 +61,8 @@ func setupTracing(conf *static.Tracing) tracing.TrackingBackend {
return conf.Zipkin
case datadog.Name:
return conf.DataDog
case instana.Name:
return conf.Instana
default:
log.WithoutContext().Warnf("Could not initialize tracing: unknown tracer %q", conf.Backend)
return nil

49
tracing/instana/instana.go Normal file
View File

@ -0,0 +1,49 @@
package instana
import (
"io"
"github.com/containous/traefik/log"
"github.com/instana/go-sensor"
"github.com/opentracing/opentracing-go"
)
// Name sets the name of this tracer
const Name = "instana"
// Config provides configuration settings for a instana tracer
type Config struct {
LocalAgentHost string `description:"Set instana-agent's host that the reporter will used." export:"false"`
LocalAgentPort int `description:"Set instana-agent's port that the reporter will used." export:"false"`
LogLevel string `description:"Set instana-agent's log level. ('error','warn','info','debug')" export:"false"`
}
// Setup sets up the tracer
func (c *Config) Setup(serviceName string) (opentracing.Tracer, io.Closer, error) {
// set default logLevel
logLevel := instana.Info
// check/set logLevel overrides
switch c.LogLevel {
case "error":
logLevel = instana.Error
case "warn":
logLevel = instana.Warn
case "debug":
logLevel = instana.Debug
}
tracer := instana.NewTracerWithOptions(&instana.Options{
Service: serviceName,
LogLevel: logLevel,
AgentPort: c.LocalAgentPort,
AgentHost: c.LocalAgentHost,
})
// Without this, child spans are getting the NOOP tracer
opentracing.SetGlobalTracer(tracer)
log.WithoutContext().Debug("Instana tracer configured")
return tracer, nil, nil
}

21
vendor/github.com/instana/go-sensor/LICENSE.md generated vendored Normal file
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@ -0,0 +1,21 @@
MIT License
Copyright (c) 2016 Instana
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.

183
vendor/github.com/instana/go-sensor/agent.go generated vendored Normal file
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@ -0,0 +1,183 @@
package instana
import (
"bytes"
"encoding/json"
"errors"
"io/ioutil"
"net/http"
"os"
"strconv"
"time"
)
const (
agentDiscoveryURL = "/com.instana.plugin.golang.discovery"
agentTracesURL = "/com.instana.plugin.golang/traces."
agentDataURL = "/com.instana.plugin.golang."
agentEventURL = "/com.instana.plugin.generic.event"
agentDefaultHost = "localhost"
agentDefaultPort = 42699
agentHeader = "Instana Agent"
)
type agentResponse struct {
Pid uint32 `json:"pid"`
HostID string `json:"agentUuid"`
}
type discoveryS struct {
PID int `json:"pid"`
Name string `json:"name"`
Args []string `json:"args"`
Fd string `json:"fd"`
Inode string `json:"inode"`
}
type fromS struct {
PID string `json:"e"`
HostID string `json:"h"`
}
type agentS struct {
sensor *sensorS
fsm *fsmS
from *fromS
host string
client *http.Client
}
func (r *agentS) init() {
r.client = &http.Client{Timeout: 5 * time.Second}
r.fsm = r.initFsm()
r.setFrom(&fromS{})
}
func (r *agentS) makeURL(prefix string) string {
return r.makeHostURL(r.host, prefix)
}
func (r *agentS) makeHostURL(host string, prefix string) string {
envPort := os.Getenv("INSTANA_AGENT_PORT")
port := agentDefaultPort
if r.sensor.options.AgentPort > 0 {
return r.makeFullURL(host, r.sensor.options.AgentPort, prefix)
}
if envPort == "" {
return r.makeFullURL(host, port, prefix)
}
port, err := strconv.Atoi(envPort)
if err != nil {
return r.makeFullURL(host, agentDefaultPort, prefix)
}
return r.makeFullURL(host, port, prefix)
}
func (r *agentS) makeFullURL(host string, port int, prefix string) string {
var buffer bytes.Buffer
buffer.WriteString("http://")
buffer.WriteString(host)
buffer.WriteString(":")
buffer.WriteString(strconv.Itoa(port))
buffer.WriteString(prefix)
if prefix[len(prefix)-1:] == "." && r.from.PID != "" {
buffer.WriteString(r.from.PID)
}
return buffer.String()
}
func (r *agentS) head(url string) (string, error) {
return r.request(url, "HEAD", nil)
}
func (r *agentS) request(url string, method string, data interface{}) (string, error) {
return r.fullRequestResponse(url, method, data, nil, "")
}
func (r *agentS) requestResponse(url string, method string, data interface{}, ret interface{}) (string, error) {
return r.fullRequestResponse(url, method, data, ret, "")
}
func (r *agentS) requestHeader(url string, method string, header string) (string, error) {
return r.fullRequestResponse(url, method, nil, nil, header)
}
func (r *agentS) fullRequestResponse(url string, method string, data interface{}, body interface{}, header string) (string, error) {
var j []byte
var ret string
var err error
var resp *http.Response
var req *http.Request
if data != nil {
j, err = json.Marshal(data)
}
if err == nil {
if j != nil {
req, err = http.NewRequest(method, url, bytes.NewBuffer(j))
} else {
req, err = http.NewRequest(method, url, nil)
}
if err == nil {
req.Header.Set("Content-Type", "application/json")
resp, err = r.client.Do(req)
if err == nil {
defer resp.Body.Close()
if resp.StatusCode < 200 || resp.StatusCode >= 300 {
err = errors.New(resp.Status)
} else {
log.debug("agent response:", url, resp.Status)
if body != nil {
var b []byte
b, err = ioutil.ReadAll(resp.Body)
json.Unmarshal(b, body)
}
if header != "" {
ret = resp.Header.Get(header)
}
}
}
}
}
if err != nil {
// Ignore errors while in announced stated (before ready) as
// this is the time where the entity is registering in the Instana
// backend and it will return 404 until it's done.
if !r.sensor.agent.fsm.fsm.Is("announced") {
log.info(err, url)
}
}
return ret, err
}
func (r *agentS) setFrom(from *fromS) {
r.from = from
}
func (r *agentS) setHost(host string) {
r.host = host
}
func (r *agentS) reset() {
r.fsm.reset()
}
func (r *sensorS) initAgent() *agentS {
log.debug("initializing agent")
ret := new(agentS)
ret.sensor = r
ret.init()
return ret
}

42
vendor/github.com/instana/go-sensor/context.go generated vendored Normal file
View File

@ -0,0 +1,42 @@
package instana
// SpanContext holds the basic Span metadata.
type SpanContext struct {
// A probabilistically unique identifier for a [multi-span] trace.
TraceID int64
// A probabilistically unique identifier for a span.
SpanID int64
// Whether the trace is sampled.
Sampled bool
// The span's associated baggage.
Baggage map[string]string // initialized on first use
}
// ForeachBaggageItem belongs to the opentracing.SpanContext interface
func (c SpanContext) ForeachBaggageItem(handler func(k, v string) bool) {
for k, v := range c.Baggage {
if !handler(k, v) {
break
}
}
}
// WithBaggageItem returns an entirely new SpanContext with the
// given key:value baggage pair set.
func (c SpanContext) WithBaggageItem(key, val string) SpanContext {
var newBaggage map[string]string
if c.Baggage == nil {
newBaggage = map[string]string{key: val}
} else {
newBaggage = make(map[string]string, len(c.Baggage)+1)
for k, v := range c.Baggage {
newBaggage[k] = v
}
newBaggage[key] = val
}
// Use positional parameters so the compiler will help catch new fields.
return SpanContext{c.TraceID, c.SpanID, c.Sampled, newBaggage}
}

37
vendor/github.com/instana/go-sensor/eum.go generated vendored Normal file
View File

@ -0,0 +1,37 @@
package instana
import (
"bytes"
"io/ioutil"
"strings"
)
const eumTemplate string = "eum.js"
// EumSnippet generates javascript code to initialize JavaScript agent
func EumSnippet(apiKey string, traceID string, meta map[string]string) string {
if len(apiKey) == 0 || len(traceID) == 0 {
return ""
}
b, err := ioutil.ReadFile(eumTemplate)
if err != nil {
return ""
}
var snippet = string(b)
var metaBuffer bytes.Buffer
snippet = strings.Replace(snippet, "$apiKey", apiKey, -1)
snippet = strings.Replace(snippet, "$traceId", traceID, -1)
for key, value := range meta {
metaBuffer.WriteString(" ineum('meta', '" + key + "', '" + value + "');\n")
}
snippet = strings.Replace(snippet, "$meta", metaBuffer.String(), -1)
return snippet
}

78
vendor/github.com/instana/go-sensor/event.go generated vendored Normal file
View File

@ -0,0 +1,78 @@
package instana
import (
"time"
)
// EventData is the construct serialized for the host agent
type EventData struct {
Title string `json:"title"`
Text string `json:"text"`
// Duration in milliseconds
Duration int `json:"duration"`
// Severity with value of -1, 5, 10 : see type severity
Severity int `json:"severity"`
Plugin string `json:"plugin,omitempty"`
ID string `json:"id,omitempty"`
Host string `json:"host"`
}
type severity int
//Severity values for events sent to the instana agent
const (
SeverityChange severity = -1
SeverityWarning severity = 5
SeverityCritical severity = 10
)
// Defaults for the Event API
const (
ServicePlugin = "com.instana.forge.connection.http.logical.LogicalWebApp"
ServiceHost = ""
)
// SendDefaultServiceEvent sends a default event which already contains the service and host
func SendDefaultServiceEvent(title string, text string, sev severity, duration time.Duration) {
if sensor == nil {
// Since no sensor was initialized, there is no default service (as
// configured on the sensor) so we send blank.
SendServiceEvent("", title, text, sev, duration)
} else {
SendServiceEvent(sensor.serviceName, title, text, sev, duration)
}
}
// SendServiceEvent send an event on a specific service
func SendServiceEvent(service string, title string, text string, sev severity, duration time.Duration) {
sendEvent(&EventData{
Title: title,
Text: text,
Severity: int(sev),
Plugin: ServicePlugin,
ID: service,
Host: ServiceHost,
Duration: int(duration / time.Millisecond),
})
}
// SendHostEvent send an event on the current host
func SendHostEvent(title string, text string, sev severity, duration time.Duration) {
sendEvent(&EventData{
Title: title,
Text: text,
Duration: int(duration / time.Millisecond),
Severity: int(sev),
})
}
func sendEvent(event *EventData) {
if sensor == nil {
// If the sensor hasn't initialized we do so here so that we properly
// discover where the host agent may be as it varies between a
// normal host, docker, kubernetes etc..
InitSensor(&Options{})
}
//we do fire & forget here, because the whole pid dance isn't necessary to send events
go sensor.agent.request(sensor.agent.makeURL(agentEventURL), "POST", event)
}

242
vendor/github.com/instana/go-sensor/fsm.go generated vendored Normal file
View File

@ -0,0 +1,242 @@
package instana
import (
"bufio"
"fmt"
"net"
"os"
"os/exec"
"regexp"
"strconv"
"time"
f "github.com/looplab/fsm"
)
const (
eInit = "init"
eLookup = "lookup"
eAnnounce = "announce"
eTest = "test"
retryPeriod = 30 * 1000
maximumRetries = 2
)
type fsmS struct {
agent *agentS
fsm *f.FSM
timer *time.Timer
retries int
}
func (r *fsmS) init() {
log.warn("Stan is on the scene. Starting Instana instrumentation.")
log.debug("initializing fsm")
r.fsm = f.NewFSM(
"none",
f.Events{
{Name: eInit, Src: []string{"none", "unannounced", "announced", "ready"}, Dst: "init"},
{Name: eLookup, Src: []string{"init"}, Dst: "unannounced"},
{Name: eAnnounce, Src: []string{"unannounced"}, Dst: "announced"},
{Name: eTest, Src: []string{"announced"}, Dst: "ready"}},
f.Callbacks{
"init": r.lookupAgentHost,
"enter_unannounced": r.announceSensor,
"enter_announced": r.testAgent})
r.retries = maximumRetries
r.fsm.Event(eInit)
}
func (r *fsmS) scheduleRetry(e *f.Event, cb func(e *f.Event)) {
r.timer = time.NewTimer(retryPeriod * time.Millisecond)
go func() {
<-r.timer.C
cb(e)
}()
}
func (r *fsmS) lookupAgentHost(e *f.Event) {
cb := func(b bool, host string) {
if b {
r.lookupSuccess(host)
} else {
gateway := r.getDefaultGateway()
if gateway != "" {
go r.checkHost(gateway, func(b bool, host string) {
if b {
r.lookupSuccess(host)
} else {
log.error("Cannot connect to the agent through localhost or default gateway. Scheduling retry.")
r.scheduleRetry(e, r.lookupAgentHost)
}
})
} else {
log.error("Default gateway not available. Scheduling retry")
r.scheduleRetry(e, r.lookupAgentHost)
}
}
}
hostNames := []string{
r.agent.sensor.options.AgentHost,
os.Getenv("INSTANA_AGENT_HOST"),
agentDefaultHost,
}
for _, name := range hostNames {
if name != "" {
go r.checkHost(name, cb)
return
}
}
}
func (r *fsmS) getDefaultGateway() string {
out, _ := exec.Command("/bin/sh", "-c", "/sbin/ip route | awk '/default/' | cut -d ' ' -f 3 | tr -d '\n'").Output()
log.debug("checking default gateway", string(out[:]))
return string(out[:])
}
func (r *fsmS) checkHost(host string, cb func(b bool, host string)) {
log.debug("checking host", host)
header, err := r.agent.requestHeader(r.agent.makeHostURL(host, "/"), "GET", "Server")
cb(err == nil && header == agentHeader, host)
}
func (r *fsmS) lookupSuccess(host string) {
log.debug("agent lookup success", host)
r.agent.setHost(host)
r.retries = maximumRetries
r.fsm.Event(eLookup)
}
func (r *fsmS) announceSensor(e *f.Event) {
cb := func(b bool, from *fromS) {
if b {
log.info("Host agent available. We're in business. Announced pid:", from.PID)
r.agent.setFrom(from)
r.retries = maximumRetries
r.fsm.Event(eAnnounce)
} else {
log.error("Cannot announce sensor. Scheduling retry.")
r.retries--
if r.retries > 0 {
r.scheduleRetry(e, r.announceSensor)
} else {
r.fsm.Event(eInit)
}
}
}
log.debug("announcing sensor to the agent")
go func(cb func(b bool, from *fromS)) {
defer func() {
if r := recover(); r != nil {
log.debug("Announce recovered:", r)
}
}()
pid := 0
schedFile := fmt.Sprintf("/proc/%d/sched", os.Getpid())
if _, err := os.Stat(schedFile); err == nil {
sf, err := os.Open(schedFile)
defer sf.Close()
if err == nil {
fscanner := bufio.NewScanner(sf)
fscanner.Scan()
primaLinea := fscanner.Text()
r := regexp.MustCompile("\\((\\d+),")
match := r.FindStringSubmatch(primaLinea)
i, err := strconv.Atoi(match[1])
if err == nil {
pid = i
}
}
}
if pid == 0 {
pid = os.Getpid()
}
d := &discoveryS{PID: pid}
d.Name, d.Args = getCommandLine()
if _, err := os.Stat("/proc"); err == nil {
if addr, err := net.ResolveTCPAddr("tcp", r.agent.host+":42699"); err == nil {
if tcpConn, err := net.DialTCP("tcp", nil, addr); err == nil {
defer tcpConn.Close()
f, err := tcpConn.File()
if err != nil {
log.error(err)
} else {
d.Fd = fmt.Sprintf("%v", f.Fd())
link := fmt.Sprintf("/proc/%d/fd/%d", os.Getpid(), f.Fd())
if _, err := os.Stat(link); err == nil {
d.Inode, _ = os.Readlink(link)
}
}
}
}
}
ret := &agentResponse{}
_, err := r.agent.requestResponse(r.agent.makeURL(agentDiscoveryURL), "PUT", d, ret)
cb(err == nil,
&fromS{
PID: strconv.Itoa(int(ret.Pid)),
HostID: ret.HostID})
}(cb)
}
func (r *fsmS) testAgent(e *f.Event) {
cb := func(b bool) {
if b {
r.retries = maximumRetries
r.fsm.Event(eTest)
} else {
log.debug("Agent is not yet ready. Scheduling retry.")
r.retries--
if r.retries > 0 {
r.scheduleRetry(e, r.testAgent)
} else {
r.fsm.Event(eInit)
}
}
}
log.debug("testing communication with the agent")
go func(cb func(b bool)) {
_, err := r.agent.head(r.agent.makeURL(agentDataURL))
cb(err == nil)
}(cb)
}
func (r *fsmS) reset() {
r.retries = maximumRetries
r.fsm.Event(eInit)
}
func (r *agentS) initFsm() *fsmS {
ret := new(fsmS)
ret.agent = r
ret.init()
return ret
}
func (r *agentS) canSend() bool {
return r.fsm.fsm.Current() == "ready"
}

38
vendor/github.com/instana/go-sensor/json_span.go generated vendored Normal file
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package instana
import (
ot "github.com/opentracing/opentracing-go"
)
type jsonSpan struct {
TraceID int64 `json:"t"`
ParentID *int64 `json:"p,omitempty"`
SpanID int64 `json:"s"`
Timestamp uint64 `json:"ts"`
Duration uint64 `json:"d"`
Name string `json:"n"`
From *fromS `json:"f"`
Error bool `json:"error"`
Ec int `json:"ec,omitempty"`
Lang string `json:"ta,omitempty"`
Data *jsonData `json:"data"`
}
type jsonData struct {
Service string `json:"service,omitempty"`
SDK *jsonSDKData `json:"sdk"`
}
type jsonCustomData struct {
Tags ot.Tags `json:"tags,omitempty"`
Logs map[uint64]map[string]interface{} `json:"logs,omitempty"`
Baggage map[string]string `json:"baggage,omitempty"`
}
type jsonSDKData struct {
Name string `json:"name"`
Type string `json:"type,omitempty"`
Arguments string `json:"arguments,omitempty"`
Return string `json:"return,omitempty"`
Custom *jsonCustomData `json:"custom,omitempty"`
}

52
vendor/github.com/instana/go-sensor/log.go generated vendored Normal file
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package instana
import (
l "log"
)
// Valid log levels
const (
Error = 0
Warn = 1
Info = 2
Debug = 3
)
type logS struct {
sensor *sensorS
}
var log *logS
func (r *logS) makeV(prefix string, v ...interface{}) []interface{} {
return append([]interface{}{prefix}, v...)
}
func (r *logS) debug(v ...interface{}) {
if r.sensor.options.LogLevel >= Debug {
l.Println(r.makeV("DEBUG: instana:", v...)...)
}
}
func (r *logS) info(v ...interface{}) {
if r.sensor.options.LogLevel >= Info {
l.Println(r.makeV("INFO: instana:", v...)...)
}
}
func (r *logS) warn(v ...interface{}) {
if r.sensor.options.LogLevel >= Warn {
l.Println(r.makeV("WARN: instana:", v...)...)
}
}
func (r *logS) error(v ...interface{}) {
if r.sensor.options.LogLevel >= Error {
l.Println(r.makeV("ERROR: instana:", v...)...)
}
}
func (r *sensorS) initLog() {
log = new(logS)
log.sensor = r
}

157
vendor/github.com/instana/go-sensor/meter.go generated vendored Normal file
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package instana
import (
"runtime"
"strconv"
"time"
)
const (
// SnapshotPeriod is the amount of time in seconds between snapshot reports.
SnapshotPeriod = 600
)
// SnapshotS struct to hold snapshot data.
type SnapshotS struct {
Name string `json:"name"`
Version string `json:"version"`
Root string `json:"goroot"`
MaxProcs int `json:"maxprocs"`
Compiler string `json:"compiler"`
NumCPU int `json:"cpu"`
}
// MemoryS struct to hold snapshot data.
type MemoryS struct {
Alloc uint64 `json:"alloc"`
TotalAlloc uint64 `json:"total_alloc"`
Sys uint64 `json:"sys"`
Lookups uint64 `json:"lookups"`
Mallocs uint64 `json:"mallocs"`
Frees uint64 `json:"frees"`
HeapAlloc uint64 `json:"heap_alloc"`
HeapSys uint64 `json:"heap_sys"`
HeapIdle uint64 `json:"heap_idle"`
HeapInuse uint64 `json:"heap_in_use"`
HeapReleased uint64 `json:"heap_released"`
HeapObjects uint64 `json:"heap_objects"`
PauseTotalNs uint64 `json:"pause_total_ns"`
PauseNs uint64 `json:"pause_ns"`
NumGC uint32 `json:"num_gc"`
GCCPUFraction float64 `json:"gc_cpu_fraction"`
}
// MetricsS struct to hold snapshot data.
type MetricsS struct {
CgoCall int64 `json:"cgo_call"`
Goroutine int `json:"goroutine"`
Memory *MemoryS `json:"memory"`
}
// EntityData struct to hold snapshot data.
type EntityData struct {
PID int `json:"pid"`
Snapshot *SnapshotS `json:"snapshot,omitempty"`
Metrics *MetricsS `json:"metrics"`
}
type meterS struct {
sensor *sensorS
numGC uint32
ticker *time.Ticker
snapshotCountdown int
}
func (r *meterS) init() {
r.ticker = time.NewTicker(1 * time.Second)
go func() {
r.snapshotCountdown = 1
for range r.ticker.C {
if r.sensor.agent.canSend() {
r.snapshotCountdown--
var s *SnapshotS
if r.snapshotCountdown == 0 {
r.snapshotCountdown = SnapshotPeriod
s = r.collectSnapshot()
log.debug("collected snapshot")
} else {
s = nil
}
pid, _ := strconv.Atoi(r.sensor.agent.from.PID)
d := &EntityData{
PID: pid,
Snapshot: s,
Metrics: r.collectMetrics()}
go r.send(d)
}
}
}()
}
func (r *meterS) send(d *EntityData) {
_, err := r.sensor.agent.request(r.sensor.agent.makeURL(agentDataURL), "POST", d)
if err != nil {
r.sensor.agent.reset()
}
}
func (r *meterS) collectMemoryMetrics() *MemoryS {
var memStats runtime.MemStats
runtime.ReadMemStats(&memStats)
ret := &MemoryS{
Alloc: memStats.Alloc,
TotalAlloc: memStats.TotalAlloc,
Sys: memStats.Sys,
Lookups: memStats.Lookups,
Mallocs: memStats.Mallocs,
Frees: memStats.Frees,
HeapAlloc: memStats.HeapAlloc,
HeapSys: memStats.HeapSys,
HeapIdle: memStats.HeapIdle,
HeapInuse: memStats.HeapInuse,
HeapReleased: memStats.HeapReleased,
HeapObjects: memStats.HeapObjects,
PauseTotalNs: memStats.PauseTotalNs,
NumGC: memStats.NumGC,
GCCPUFraction: memStats.GCCPUFraction}
if r.numGC < memStats.NumGC {
ret.PauseNs = memStats.PauseNs[(memStats.NumGC+255)%256]
r.numGC = memStats.NumGC
} else {
ret.PauseNs = 0
}
return ret
}
func (r *meterS) collectMetrics() *MetricsS {
return &MetricsS{
CgoCall: runtime.NumCgoCall(),
Goroutine: runtime.NumGoroutine(),
Memory: r.collectMemoryMetrics()}
}
func (r *meterS) collectSnapshot() *SnapshotS {
return &SnapshotS{
Name: r.sensor.serviceName,
Version: runtime.Version(),
Root: runtime.GOROOT(),
MaxProcs: runtime.GOMAXPROCS(0),
Compiler: runtime.Compiler,
NumCPU: runtime.NumCPU()}
}
func (r *sensorS) initMeter() *meterS {
log.debug("initializing meter")
ret := new(meterS)
ret.sensor = r
ret.init()
return ret
}

12
vendor/github.com/instana/go-sensor/options.go generated vendored Normal file
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package instana
// Options allows the user to configure the to-be-initialized
// sensor
type Options struct {
Service string
AgentHost string
AgentPort int
MaxBufferedSpans int
ForceTransmissionStartingAt int
LogLevel int
}

165
vendor/github.com/instana/go-sensor/propagation.go generated vendored Normal file
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package instana
import (
"net/http"
"strconv"
"strings"
ot "github.com/opentracing/opentracing-go"
)
type textMapPropagator struct {
tracer *tracerS
}
// Instana header constants
const (
// FieldT Trace ID header
FieldT = "x-instana-t"
// FieldS Span ID header
FieldS = "x-instana-s"
// FieldL Level header
FieldL = "x-instana-l"
// FieldB OT Baggage header
FieldB = "x-instana-b-"
fieldCount = 2
)
func (r *textMapPropagator) inject(spanContext ot.SpanContext, opaqueCarrier interface{}) error {
sc, ok := spanContext.(SpanContext)
if !ok {
return ot.ErrInvalidSpanContext
}
roCarrier, ok := opaqueCarrier.(ot.TextMapReader)
if !ok {
return ot.ErrInvalidCarrier
}
// Handle pre-existing case-sensitive keys
var (
exstfieldT = FieldT
exstfieldS = FieldS
exstfieldL = FieldL
exstfieldB = FieldB
)
roCarrier.ForeachKey(func(k, v string) error {
switch strings.ToLower(k) {
case FieldT:
exstfieldT = k
case FieldS:
exstfieldS = k
case FieldL:
exstfieldL = k
default:
if strings.HasPrefix(strings.ToLower(k), FieldB) {
exstfieldB = string([]rune(k)[0:len(FieldB)])
}
}
return nil
})
carrier, ok := opaqueCarrier.(ot.TextMapWriter)
if !ok {
return ot.ErrInvalidCarrier
}
hhcarrier, ok := opaqueCarrier.(ot.HTTPHeadersCarrier)
if ok {
// If http.Headers has pre-existing keys, calling Set() like we do
// below will just append to those existing values and break context
// propagation. So defend against that case, we delete any pre-existing
// keys entirely first.
y := http.Header(hhcarrier)
y.Del(exstfieldT)
y.Del(exstfieldS)
y.Del(exstfieldL)
for key := range y {
if strings.HasPrefix(strings.ToLower(key), FieldB) {
y.Del(key)
}
}
}
if instanaTID, err := ID2Header(sc.TraceID); err == nil {
carrier.Set(exstfieldT, instanaTID)
} else {
log.debug(err)
}
if instanaSID, err := ID2Header(sc.SpanID); err == nil {
carrier.Set(exstfieldS, instanaSID)
} else {
log.debug(err)
}
carrier.Set(exstfieldL, strconv.Itoa(1))
for k, v := range sc.Baggage {
carrier.Set(exstfieldB+k, v)
}
return nil
}
func (r *textMapPropagator) extract(opaqueCarrier interface{}) (ot.SpanContext, error) {
carrier, ok := opaqueCarrier.(ot.TextMapReader)
if !ok {
return nil, ot.ErrInvalidCarrier
}
fieldCount := 0
var traceID, spanID int64
var err error
baggage := make(map[string]string)
err = carrier.ForeachKey(func(k, v string) error {
switch strings.ToLower(k) {
case FieldT:
fieldCount++
traceID, err = Header2ID(v)
if err != nil {
return ot.ErrSpanContextCorrupted
}
case FieldS:
fieldCount++
spanID, err = Header2ID(v)
if err != nil {
return ot.ErrSpanContextCorrupted
}
default:
lk := strings.ToLower(k)
if strings.HasPrefix(lk, FieldB) {
baggage[strings.TrimPrefix(lk, FieldB)] = v
}
}
return nil
})
return r.finishExtract(err, fieldCount, traceID, spanID, baggage)
}
func (r *textMapPropagator) finishExtract(err error,
fieldCount int,
traceID int64,
spanID int64,
baggage map[string]string) (ot.SpanContext, error) {
if err != nil {
return nil, err
}
if fieldCount < 2 {
if fieldCount == 0 {
return nil, ot.ErrSpanContextNotFound
}
return nil, ot.ErrSpanContextCorrupted
}
return SpanContext{
TraceID: traceID,
SpanID: spanID,
Sampled: false,
Baggage: baggage,
}, nil
}

175
vendor/github.com/instana/go-sensor/recorder.go generated vendored Normal file
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package instana
import (
"sync"
"time"
)
// A SpanRecorder handles all of the `RawSpan` data generated via an
// associated `Tracer` (see `NewStandardTracer`) instance. It also names
// the containing process and provides access to a straightforward tag map.
type SpanRecorder interface {
// Implementations must determine whether and where to store `span`.
RecordSpan(span *spanS)
}
// Recorder accepts spans, processes and queues them
// for delivery to the backend.
type Recorder struct {
sync.RWMutex
spans []jsonSpan
testMode bool
}
// NewRecorder Establish a Recorder span recorder
func NewRecorder() *Recorder {
r := new(Recorder)
r.init()
return r
}
// NewTestRecorder Establish a new span recorder used for testing
func NewTestRecorder() *Recorder {
r := new(Recorder)
r.testMode = true
r.init()
return r
}
func (r *Recorder) init() {
r.clearQueuedSpans()
if r.testMode {
return
}
ticker := time.NewTicker(1 * time.Second)
go func() {
for range ticker.C {
if sensor.agent.canSend() {
r.send()
}
}
}()
}
// RecordSpan accepts spans to be recorded and and added to the span queue
// for eventual reporting to the host agent.
func (r *Recorder) RecordSpan(span *spanS) {
// If we're not announced and not in test mode then just
// return
if !r.testMode && !sensor.agent.canSend() {
return
}
var data = &jsonData{}
kind := span.getSpanKind()
data.SDK = &jsonSDKData{
Name: span.Operation,
Type: kind,
Custom: &jsonCustomData{Tags: span.Tags, Logs: span.collectLogs()}}
baggage := make(map[string]string)
span.context.ForeachBaggageItem(func(k string, v string) bool {
baggage[k] = v
return true
})
if len(baggage) > 0 {
data.SDK.Custom.Baggage = baggage
}
data.Service = sensor.serviceName
var parentID *int64
if span.ParentSpanID == 0 {
parentID = nil
} else {
parentID = &span.ParentSpanID
}
r.Lock()
defer r.Unlock()
if len(r.spans) == sensor.options.MaxBufferedSpans {
r.spans = r.spans[1:]
}
r.spans = append(r.spans, jsonSpan{
TraceID: span.context.TraceID,
ParentID: parentID,
SpanID: span.context.SpanID,
Timestamp: uint64(span.Start.UnixNano()) / uint64(time.Millisecond),
Duration: uint64(span.Duration) / uint64(time.Millisecond),
Name: "sdk",
Error: span.Error,
Ec: span.Ec,
Lang: "go",
From: sensor.agent.from,
Data: data})
if r.testMode || !sensor.agent.canSend() {
return
}
if len(r.spans) >= sensor.options.ForceTransmissionStartingAt {
log.debug("Forcing spans to agent. Count:", len(r.spans))
go r.send()
}
}
// QueuedSpansCount returns the number of queued spans
// Used only in tests currently.
func (r *Recorder) QueuedSpansCount() int {
r.RLock()
defer r.RUnlock()
return len(r.spans)
}
// GetQueuedSpans returns a copy of the queued spans and clears the queue.
func (r *Recorder) GetQueuedSpans() []jsonSpan {
r.Lock()
defer r.Unlock()
// Copy queued spans
queuedSpans := make([]jsonSpan, len(r.spans))
copy(queuedSpans, r.spans)
// and clear out the source
r.clearQueuedSpans()
return queuedSpans
}
// clearQueuedSpans brings the span queue to empty/0/nada
// This function doesn't take the Lock so make sure to have
// the write lock before calling.
// This is meant to be called from GetQueuedSpans which handles
// locking.
func (r *Recorder) clearQueuedSpans() {
var mbs int
if len(r.spans) > 0 {
if sensor != nil {
mbs = sensor.options.MaxBufferedSpans
} else {
mbs = DefaultMaxBufferedSpans
}
r.spans = make([]jsonSpan, 0, mbs)
}
}
// Retrieve the queued spans and post them to the host agent asynchronously.
func (r *Recorder) send() {
spansToSend := r.GetQueuedSpans()
if len(spansToSend) > 0 {
go func() {
_, err := sensor.agent.request(sensor.agent.makeURL(agentTracesURL), "POST", spansToSend)
if err != nil {
log.debug("Posting traces failed in send(): ", err)
sensor.agent.reset()
}
}()
}
}

76
vendor/github.com/instana/go-sensor/sensor.go generated vendored Normal file
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package instana
import (
"os"
"path/filepath"
)
const (
DefaultMaxBufferedSpans = 1000
DefaultForceSpanSendAt = 500
)
type sensorS struct {
meter *meterS
agent *agentS
options *Options
serviceName string
}
var sensor *sensorS
func (r *sensorS) init(options *Options) {
//sensor can be initialized explicit or implicit through OpenTracing global init
if r.meter == nil {
r.setOptions(options)
r.configureServiceName()
r.agent = r.initAgent()
r.meter = r.initMeter()
}
}
func (r *sensorS) setOptions(options *Options) {
r.options = options
if r.options == nil {
r.options = &Options{}
}
if r.options.MaxBufferedSpans == 0 {
r.options.MaxBufferedSpans = DefaultMaxBufferedSpans
}
if r.options.ForceTransmissionStartingAt == 0 {
r.options.ForceTransmissionStartingAt = DefaultForceSpanSendAt
}
}
func (r *sensorS) getOptions() *Options {
return r.options
}
func (r *sensorS) configureServiceName() {
if r.options != nil {
r.serviceName = r.options.Service
}
if r.serviceName == "" {
r.serviceName = filepath.Base(os.Args[0])
}
}
// InitSensor Intializes the sensor (without tracing) to begin collecting
// and reporting metrics.
func InitSensor(options *Options) {
if sensor == nil {
sensor = new(sensorS)
// If this environment variable is set, then override log level
_, ok := os.LookupEnv("INSTANA_DEV")
if ok {
options.LogLevel = Debug
}
sensor.initLog()
sensor.init(options)
log.debug("initialized sensor")
}
}

253
vendor/github.com/instana/go-sensor/span.go generated vendored Normal file
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package instana
import (
"fmt"
"os"
"sync"
"time"
ot "github.com/opentracing/opentracing-go"
"github.com/opentracing/opentracing-go/ext"
otlog "github.com/opentracing/opentracing-go/log"
)
type spanS struct {
tracer *tracerS
sync.Mutex
context SpanContext
ParentSpanID int64
Operation string
Start time.Time
Duration time.Duration
Tags ot.Tags
Logs []ot.LogRecord
Error bool
Ec int
}
func (r *spanS) BaggageItem(key string) string {
r.Lock()
defer r.Unlock()
return r.context.Baggage[key]
}
func (r *spanS) SetBaggageItem(key, val string) ot.Span {
if r.trim() {
return r
}
r.Lock()
defer r.Unlock()
r.context = r.context.WithBaggageItem(key, val)
return r
}
func (r *spanS) Context() ot.SpanContext {
return r.context
}
func (r *spanS) Finish() {
r.FinishWithOptions(ot.FinishOptions{})
}
func (r *spanS) FinishWithOptions(opts ot.FinishOptions) {
finishTime := opts.FinishTime
if finishTime.IsZero() {
finishTime = time.Now()
}
duration := finishTime.Sub(r.Start)
r.Lock()
defer r.Unlock()
for _, lr := range opts.LogRecords {
r.appendLog(lr)
}
for _, ld := range opts.BulkLogData {
r.appendLog(ld.ToLogRecord())
}
r.Duration = duration
r.tracer.options.Recorder.RecordSpan(r)
}
func (r *spanS) appendLog(lr ot.LogRecord) {
maxLogs := r.tracer.options.MaxLogsPerSpan
if maxLogs == 0 || len(r.Logs) < maxLogs {
r.Logs = append(r.Logs, lr)
}
}
func (r *spanS) Log(ld ot.LogData) {
r.Lock()
defer r.Unlock()
if r.trim() || r.tracer.options.DropAllLogs {
return
}
if ld.Timestamp.IsZero() {
ld.Timestamp = time.Now()
}
r.appendLog(ld.ToLogRecord())
}
func (r *spanS) trim() bool {
return !r.context.Sampled && r.tracer.options.TrimUnsampledSpans
}
func (r *spanS) LogEvent(event string) {
r.Log(ot.LogData{
Event: event})
}
func (r *spanS) LogEventWithPayload(event string, payload interface{}) {
r.Log(ot.LogData{
Event: event,
Payload: payload})
}
func (r *spanS) LogFields(fields ...otlog.Field) {
for _, v := range fields {
// If this tag indicates an error, increase the error count
if v.Key() == "error" {
r.Error = true
r.Ec++
}
}
lr := ot.LogRecord{
Fields: fields,
}
r.Lock()
defer r.Unlock()
if r.trim() || r.tracer.options.DropAllLogs {
return
}
if lr.Timestamp.IsZero() {
lr.Timestamp = time.Now()
}
r.appendLog(lr)
}
func (r *spanS) LogKV(keyValues ...interface{}) {
fields, err := otlog.InterleavedKVToFields(keyValues...)
if err != nil {
r.LogFields(otlog.Error(err), otlog.String("function", "LogKV"))
return
}
r.LogFields(fields...)
}
func (r *spanS) SetOperationName(operationName string) ot.Span {
r.Lock()
defer r.Unlock()
r.Operation = operationName
return r
}
func (r *spanS) SetTag(key string, value interface{}) ot.Span {
r.Lock()
defer r.Unlock()
if r.trim() {
return r
}
if r.Tags == nil {
r.Tags = ot.Tags{}
}
// If this tag indicates an error, increase the error count
if key == "error" {
r.Error = true
r.Ec++
}
r.Tags[key] = value
return r
}
func (r *spanS) Tracer() ot.Tracer {
return r.tracer
}
func (r *spanS) getTag(tag string) interface{} {
var x, ok = r.Tags[tag]
if !ok {
x = ""
}
return x
}
func (r *spanS) getIntTag(tag string) int {
d := r.Tags[tag]
if d == nil {
return -1
}
x, ok := d.(int)
if !ok {
return -1
}
return x
}
func (r *spanS) getStringTag(tag string) string {
d := r.Tags[tag]
if d == nil {
return ""
}
return fmt.Sprint(d)
}
func (r *spanS) getHostName() string {
hostTag := r.getStringTag(string(ext.PeerHostname))
if hostTag != "" {
return hostTag
}
h, err := os.Hostname()
if err != nil {
h = "localhost"
}
return h
}
func (r *spanS) getSpanKind() string {
kind := r.getStringTag(string(ext.SpanKind))
switch kind {
case string(ext.SpanKindRPCServerEnum), "consumer", "entry":
return "entry"
case string(ext.SpanKindRPCClientEnum), "producer", "exit":
return "exit"
}
return ""
}
func (r *spanS) collectLogs() map[uint64]map[string]interface{} {
logs := make(map[uint64]map[string]interface{})
for _, l := range r.Logs {
if _, ok := logs[uint64(l.Timestamp.UnixNano())/uint64(time.Millisecond)]; !ok {
logs[uint64(l.Timestamp.UnixNano())/uint64(time.Millisecond)] = make(map[string]interface{})
}
for _, f := range l.Fields {
logs[uint64(l.Timestamp.UnixNano())/uint64(time.Millisecond)][f.Key()] = f.Value()
}
}
return logs
}

119
vendor/github.com/instana/go-sensor/tracer.go generated vendored Normal file
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package instana
import (
"time"
ot "github.com/opentracing/opentracing-go"
)
const (
// MaxLogsPerSpan The maximum number of logs allowed on a span.
MaxLogsPerSpan = 2
)
type tracerS struct {
options TracerOptions
textPropagator *textMapPropagator
}
func (r *tracerS) Inject(sc ot.SpanContext, format interface{}, carrier interface{}) error {
switch format {
case ot.TextMap, ot.HTTPHeaders:
return r.textPropagator.inject(sc, carrier)
}
return ot.ErrUnsupportedFormat
}
func (r *tracerS) Extract(format interface{}, carrier interface{}) (ot.SpanContext, error) {
switch format {
case ot.TextMap, ot.HTTPHeaders:
return r.textPropagator.extract(carrier)
}
return nil, ot.ErrUnsupportedFormat
}
func (r *tracerS) StartSpan(operationName string, opts ...ot.StartSpanOption) ot.Span {
sso := ot.StartSpanOptions{}
for _, o := range opts {
o.Apply(&sso)
}
return r.StartSpanWithOptions(operationName, sso)
}
func (r *tracerS) StartSpanWithOptions(operationName string, opts ot.StartSpanOptions) ot.Span {
startTime := opts.StartTime
if startTime.IsZero() {
startTime = time.Now()
}
tags := opts.Tags
span := &spanS{}
Loop:
for _, ref := range opts.References {
switch ref.Type {
case ot.ChildOfRef, ot.FollowsFromRef:
refCtx := ref.ReferencedContext.(SpanContext)
span.context.TraceID = refCtx.TraceID
span.context.SpanID = randomID()
span.context.Sampled = refCtx.Sampled
span.ParentSpanID = refCtx.SpanID
if l := len(refCtx.Baggage); l > 0 {
span.context.Baggage = make(map[string]string, l)
for k, v := range refCtx.Baggage {
span.context.Baggage[k] = v
}
}
break Loop
}
}
if span.context.TraceID == 0 {
span.context.SpanID = randomID()
span.context.TraceID = span.context.SpanID
span.context.Sampled = r.options.ShouldSample(span.context.TraceID)
}
return r.startSpanInternal(span, operationName, startTime, tags)
}
func (r *tracerS) startSpanInternal(span *spanS, operationName string, startTime time.Time, tags ot.Tags) ot.Span {
span.tracer = r
span.Operation = operationName
span.Start = startTime
span.Duration = -1
span.Tags = tags
return span
}
func shouldSample(traceID int64) bool {
return false
}
// NewTracer Get a new Tracer with the default options applied.
func NewTracer() ot.Tracer {
return NewTracerWithOptions(&Options{})
}
// NewTracerWithOptions Get a new Tracer with the specified options.
func NewTracerWithOptions(options *Options) ot.Tracer {
InitSensor(options)
return NewTracerWithEverything(options, NewRecorder())
}
// NewTracerWithEverything Get a new Tracer with the works.
func NewTracerWithEverything(options *Options, recorder SpanRecorder) ot.Tracer {
InitSensor(options)
ret := &tracerS{options: TracerOptions{
Recorder: recorder,
ShouldSample: shouldSample,
MaxLogsPerSpan: MaxLogsPerSpan}}
ret.textPropagator = &textMapPropagator{ret}
return ret
}

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vendor/github.com/instana/go-sensor/tracer_options.go generated vendored Normal file
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package instana
import (
bt "github.com/opentracing/basictracer-go"
opentracing "github.com/opentracing/opentracing-go"
)
// Tracer extends the opentracing.Tracer interface
type Tracer interface {
opentracing.Tracer
// Options gets the Options used in New() or NewWithOptions().
Options() TracerOptions
}
// TracerOptions allows creating a customized Tracer via NewWithOptions. The object
// must not be updated when there is an active tracer using it.
type TracerOptions struct {
// ShouldSample is a function which is called when creating a new Span and
// determines whether that Span is sampled. The randomized TraceID is supplied
// to allow deterministic sampling decisions to be made across different nodes.
// For example,
//
// func(traceID uint64) { return traceID % 64 == 0 }
//
// samples every 64th trace on average.
ShouldSample func(traceID int64) bool
// TrimUnsampledSpans turns potentially expensive operations on unsampled
// Spans into no-ops. More precisely, tags and log events are silently
// discarded. If NewSpanEventListener is set, the callbacks will still fire.
TrimUnsampledSpans bool
// Recorder receives Spans which have been finished.
Recorder SpanRecorder
// NewSpanEventListener can be used to enhance the tracer by effectively
// attaching external code to trace events. See NetTraceIntegrator for a
// practical example, and event.go for the list of possible events.
NewSpanEventListener func() func(bt.SpanEvent)
// DropAllLogs turns log events on all Spans into no-ops.
// If NewSpanEventListener is set, the callbacks will still fire.
DropAllLogs bool
// MaxLogsPerSpan limits the number of Logs in a span (if set to a nonzero
// value). If a span has more logs than this value, logs are dropped as
// necessary (and replaced with a log describing how many were dropped).
//
// About half of the MaxLogPerSpan logs kept are the oldest logs, and about
// half are the newest logs.
//
// If NewSpanEventListener is set, the callbacks will still fire for all log
// events. This value is ignored if DropAllLogs is true.
MaxLogsPerSpan int
// DebugAssertSingleGoroutine internally records the ID of the goroutine
// creating each Span and verifies that no operation is carried out on
// it on a different goroutine.
// Provided strictly for development purposes.
// Passing Spans between goroutine without proper synchronization often
// results in use-after-Finish() errors. For a simple example, consider the
// following pseudocode:
//
// func (s *Server) Handle(req http.Request) error {
// sp := s.StartSpan("server")
// defer sp.Finish()
// wait := s.queueProcessing(opentracing.ContextWithSpan(context.Background(), sp), req)
// select {
// case resp := <-wait:
// return resp.Error
// case <-time.After(10*time.Second):
// sp.LogEvent("timed out waiting for processing")
// return ErrTimedOut
// }
// }
//
// This looks reasonable at first, but a request which spends more than ten
// seconds in the queue is abandoned by the main goroutine and its trace
// finished, leading to use-after-finish when the request is finally
// processed. Note also that even joining on to a finished Span via
// StartSpanWithOptions constitutes an illegal operation.
//
// Code bases which do not require (or decide they do not want) Spans to
// be passed across goroutine boundaries can run with this flag enabled in
// tests to increase their chances of spotting wrong-doers.
DebugAssertSingleGoroutine bool
// DebugAssertUseAfterFinish is provided strictly for development purposes.
// When set, it attempts to exacerbate issues emanating from use of Spans
// after calling Finish by running additional assertions.
DebugAssertUseAfterFinish bool
// EnableSpanPool enables the use of a pool, so that the tracer reuses spans
// after Finish has been called on it. Adds a slight performance gain as it
// reduces allocations. However, if you have any use-after-finish race
// conditions the code may panic.
EnableSpanPool bool
}

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vendor/github.com/instana/go-sensor/util.go generated vendored Normal file
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package instana
import (
"bytes"
"encoding/binary"
"errors"
"io/ioutil"
"math/rand"
"os"
"strconv"
"strings"
"sync"
"time"
)
var (
seededIDGen = rand.New(rand.NewSource(time.Now().UnixNano()))
seededIDLock sync.Mutex
)
func randomID() int64 {
seededIDLock.Lock()
defer seededIDLock.Unlock()
return int64(seededIDGen.Int63())
}
// ID2Header converts an Instana ID to a value that can be used in
// context propagation (such as HTTP headers). More specifically,
// this converts a signed 64 bit integer into an unsigned hex string.
func ID2Header(id int64) (string, error) {
// FIXME: We're assuming LittleEndian here
// Write out _signed_ 64bit integer to byte buffer
buf := new(bytes.Buffer)
if err := binary.Write(buf, binary.LittleEndian, id); err == nil {
// Read bytes back into _unsigned_ 64 bit integer
var unsigned uint64
if err = binary.Read(buf, binary.LittleEndian, &unsigned); err == nil {
// Convert uint64 to hex string equivalent and return that
return strconv.FormatUint(unsigned, 16), nil
}
log.debug(err)
} else {
log.debug(err)
}
return "", errors.New("context corrupted; could not convert value")
}
// Header2ID converts an header context value into an Instana ID. More
// specifically, this converts an unsigned 64 bit hex value into a signed
// 64bit integer.
func Header2ID(header string) (int64, error) {
// FIXME: We're assuming LittleEndian here
// Parse unsigned 64 bit hex string into unsigned 64 bit base 10 integer
if unsignedID, err := strconv.ParseUint(header, 16, 64); err == nil {
// Write out _unsigned_ 64bit integer to byte buffer
buf := new(bytes.Buffer)
if err = binary.Write(buf, binary.LittleEndian, unsignedID); err == nil {
// Read bytes back into _signed_ 64 bit integer
var signedID int64
if err = binary.Read(buf, binary.LittleEndian, &signedID); err == nil {
// The success case
return signedID, nil
}
log.debug(err)
} else {
log.debug(err)
}
} else {
log.debug(err)
}
return int64(0), errors.New("context corrupted; could not convert value")
}
func getCommandLine() (string, []string) {
var cmdlinePath string = "/proc/" + strconv.Itoa(os.Getpid()) + "/cmdline"
cmdline, err := ioutil.ReadFile(cmdlinePath)
if err != nil {
log.debug("No /proc. Returning OS reported cmdline")
return os.Args[0], os.Args[1:]
}
parts := strings.FieldsFunc(string(cmdline), func(c rune) bool {
if c == '\u0000' {
return true
}
return false
})
log.debug("cmdline says:", parts[0], parts[1:])
return parts[0], parts[1:]
}
func abs(x int64) int64 {
y := x >> 63
return (x + y) ^ y
}

191
vendor/github.com/looplab/fsm/LICENSE generated vendored Normal file
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Apache License
Version 2.0, January 2004
http://www.apache.org/licenses/
TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
1. Definitions.
"License" shall mean the terms and conditions for use, reproduction, and
distribution as defined by Sections 1 through 9 of this document.
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that control, are controlled by, or are under common control with that entity.
For the purposes of this definition, "control" means (i) the power, direct or
indirect, to cause the direction or management of such entity, whether by
contract or otherwise, or (ii) ownership of fifty percent (50%) or more of the
outstanding shares, or (iii) beneficial ownership of such entity.
"You" (or "Your") shall mean an individual or Legal Entity exercising
permissions granted by this License.
"Source" form shall mean the preferred form for making modifications, including
but not limited to software source code, documentation source, and configuration
files.
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translation of a Source form, including but not limited to compiled object code,
generated documentation, and conversions to other media types.
"Work" shall mean the work of authorship, whether in Source or Object form, made
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"Derivative Works" shall mean any work, whether in Source or Object form, that
is based on (or derived from) the Work and for which the editorial revisions,
annotations, elaborations, or other modifications represent, as a whole, an
original work of authorship. For the purposes of this License, Derivative Works
shall not include works that remain separable from, or merely link (or bind by
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"Contribution" shall mean any work of authorship, including the original version
of the Work and any modifications or additions to that Work or Derivative Works
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Subject to the terms and conditions of this License, each Contributor hereby
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5. Submission of Contributions.
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Notwithstanding the above, nothing herein shall supersede or modify the terms of
any separate license agreement you may have executed with Licensor regarding
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In no event and under no legal theory, whether in tort (including negligence),
contract, or otherwise, unless required by applicable law (such as deliberate
and grossly negligent acts) or agreed to in writing, shall any Contributor be
liable to You for damages, including any direct, indirect, special, incidental,
or consequential damages of any character arising as a result of this License or
out of the use or inability to use the Work (including but not limited to
damages for loss of goodwill, work stoppage, computer failure or malfunction, or
any and all other commercial damages or losses), even if such Contributor has
been advised of the possibility of such damages.
9. Accepting Warranty or Additional Liability.
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offer, and charge a fee for, acceptance of support, warranty, indemnity, or
other liability obligations and/or rights consistent with this License. However,
in accepting such obligations, You may act only on Your own behalf and on Your
sole responsibility, not on behalf of any other Contributor, and only if You
agree to indemnify, defend, and hold each Contributor harmless for any liability
incurred by, or claims asserted against, such Contributor by reason of your
accepting any such warranty or additional liability.
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APPENDIX: How to apply the Apache License to your work
To apply the Apache License to your work, attach the following boilerplate
notice, with the fields enclosed by brackets "[]" replaced with your own
identifying information. (Don't include the brackets!) The text should be
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Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
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Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.

100
vendor/github.com/looplab/fsm/errors.go generated vendored Normal file
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// Copyright (c) 2013 - Max Persson <max@looplab.se>
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package fsm
// InvalidEventError is returned by FSM.Event() when the event cannot be called
// in the current state.
type InvalidEventError struct {
Event string
State string
}
func (e InvalidEventError) Error() string {
return "event " + e.Event + " inappropriate in current state " + e.State
}
// UnknownEventError is returned by FSM.Event() when the event is not defined.
type UnknownEventError struct {
Event string
}
func (e UnknownEventError) Error() string {
return "event " + e.Event + " does not exist"
}
// InTransitionError is returned by FSM.Event() when an asynchronous transition
// is already in progress.
type InTransitionError struct {
Event string
}
func (e InTransitionError) Error() string {
return "event " + e.Event + " inappropriate because previous transition did not complete"
}
// NotInTransitionError is returned by FSM.Transition() when an asynchronous
// transition is not in progress.
type NotInTransitionError struct{}
func (e NotInTransitionError) Error() string {
return "transition inappropriate because no state change in progress"
}
// NoTransitionError is returned by FSM.Event() when no transition have happened,
// for example if the source and destination states are the same.
type NoTransitionError struct {
Err error
}
func (e NoTransitionError) Error() string {
if e.Err != nil {
return "no transition with error: " + e.Err.Error()
}
return "no transition"
}
// CanceledError is returned by FSM.Event() when a callback have canceled a
// transition.
type CanceledError struct {
Err error
}
func (e CanceledError) Error() string {
if e.Err != nil {
return "transition canceled with error: " + e.Err.Error()
}
return "transition canceled"
}
// AsyncError is returned by FSM.Event() when a callback have initiated an
// asynchronous state transition.
type AsyncError struct {
Err error
}
func (e AsyncError) Error() string {
if e.Err != nil {
return "async started with error: " + e.Err.Error()
}
return "async started"
}
// InternalError is returned by FSM.Event() and should never occur. It is a
// probably because of a bug.
type InternalError struct{}
func (e InternalError) Error() string {
return "internal error on state transition"
}

62
vendor/github.com/looplab/fsm/event.go generated vendored Normal file
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// Copyright (c) 2013 - Max Persson <max@looplab.se>
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package fsm
// Event is the info that get passed as a reference in the callbacks.
type Event struct {
// FSM is a reference to the current FSM.
FSM *FSM
// Event is the event name.
Event string
// Src is the state before the transition.
Src string
// Dst is the state after the transition.
Dst string
// Err is an optional error that can be returned from a callback.
Err error
// Args is a optinal list of arguments passed to the callback.
Args []interface{}
// canceled is an internal flag set if the transition is canceled.
canceled bool
// async is an internal flag set if the transition should be asynchronous
async bool
}
// Cancel can be called in before_<EVENT> or leave_<STATE> to cancel the
// current transition before it happens. It takes an opitonal error, which will
// overwrite e.Err if set before.
func (e *Event) Cancel(err ...error) {
e.canceled = true
if len(err) > 0 {
e.Err = err[0]
}
}
// Async can be called in leave_<STATE> to do an asynchronous state transition.
//
// The current state transition will be on hold in the old state until a final
// call to Transition is made. This will comlete the transition and possibly
// call the other callbacks.
func (e *Event) Async() {
e.async = true
}

447
vendor/github.com/looplab/fsm/fsm.go generated vendored Normal file
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// Copyright (c) 2013 - Max Persson <max@looplab.se>
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
// Package fsm implements a finite state machine.
//
// It is heavily based on two FSM implementations:
//
// Javascript Finite State Machine
// https://github.com/jakesgordon/javascript-state-machine
//
// Fysom for Python
// https://github.com/oxplot/fysom (forked at https://github.com/mriehl/fysom)
//
package fsm
import (
"strings"
"sync"
)
// transitioner is an interface for the FSM's transition function.
type transitioner interface {
transition(*FSM) error
}
// FSM is the state machine that holds the current state.
//
// It has to be created with NewFSM to function properly.
type FSM struct {
// current is the state that the FSM is currently in.
current string
// transitions maps events and source states to destination states.
transitions map[eKey]string
// callbacks maps events and targers to callback functions.
callbacks map[cKey]Callback
// transition is the internal transition functions used either directly
// or when Transition is called in an asynchronous state transition.
transition func()
// transitionerObj calls the FSM's transition() function.
transitionerObj transitioner
// stateMu guards access to the current state.
stateMu sync.RWMutex
// eventMu guards access to Event() and Transition().
eventMu sync.Mutex
}
// EventDesc represents an event when initializing the FSM.
//
// The event can have one or more source states that is valid for performing
// the transition. If the FSM is in one of the source states it will end up in
// the specified destination state, calling all defined callbacks as it goes.
type EventDesc struct {
// Name is the event name used when calling for a transition.
Name string
// Src is a slice of source states that the FSM must be in to perform a
// state transition.
Src []string
// Dst is the destination state that the FSM will be in if the transition
// succeds.
Dst string
}
// Callback is a function type that callbacks should use. Event is the current
// event info as the callback happens.
type Callback func(*Event)
// Events is a shorthand for defining the transition map in NewFSM.
type Events []EventDesc
// Callbacks is a shorthand for defining the callbacks in NewFSM.a
type Callbacks map[string]Callback
// NewFSM constructs a FSM from events and callbacks.
//
// The events and transitions are specified as a slice of Event structs
// specified as Events. Each Event is mapped to one or more internal
// transitions from Event.Src to Event.Dst.
//
// Callbacks are added as a map specified as Callbacks where the key is parsed
// as the callback event as follows, and called in the same order:
//
// 1. before_<EVENT> - called before event named <EVENT>
//
// 2. before_event - called before all events
//
// 3. leave_<OLD_STATE> - called before leaving <OLD_STATE>
//
// 4. leave_state - called before leaving all states
//
// 5. enter_<NEW_STATE> - called after entering <NEW_STATE>
//
// 6. enter_state - called after entering all states
//
// 7. after_<EVENT> - called after event named <EVENT>
//
// 8. after_event - called after all events
//
// There are also two short form versions for the most commonly used callbacks.
// They are simply the name of the event or state:
//
// 1. <NEW_STATE> - called after entering <NEW_STATE>
//
// 2. <EVENT> - called after event named <EVENT>
//
// If both a shorthand version and a full version is specified it is undefined
// which version of the callback will end up in the internal map. This is due
// to the psuedo random nature of Go maps. No checking for multiple keys is
// currently performed.
func NewFSM(initial string, events []EventDesc, callbacks map[string]Callback) *FSM {
f := &FSM{
transitionerObj: &transitionerStruct{},
current: initial,
transitions: make(map[eKey]string),
callbacks: make(map[cKey]Callback),
}
// Build transition map and store sets of all events and states.
allEvents := make(map[string]bool)
allStates := make(map[string]bool)
for _, e := range events {
for _, src := range e.Src {
f.transitions[eKey{e.Name, src}] = e.Dst
allStates[src] = true
allStates[e.Dst] = true
}
allEvents[e.Name] = true
}
// Map all callbacks to events/states.
for name, fn := range callbacks {
var target string
var callbackType int
switch {
case strings.HasPrefix(name, "before_"):
target = strings.TrimPrefix(name, "before_")
if target == "event" {
target = ""
callbackType = callbackBeforeEvent
} else if _, ok := allEvents[target]; ok {
callbackType = callbackBeforeEvent
}
case strings.HasPrefix(name, "leave_"):
target = strings.TrimPrefix(name, "leave_")
if target == "state" {
target = ""
callbackType = callbackLeaveState
} else if _, ok := allStates[target]; ok {
callbackType = callbackLeaveState
}
case strings.HasPrefix(name, "enter_"):
target = strings.TrimPrefix(name, "enter_")
if target == "state" {
target = ""
callbackType = callbackEnterState
} else if _, ok := allStates[target]; ok {
callbackType = callbackEnterState
}
case strings.HasPrefix(name, "after_"):
target = strings.TrimPrefix(name, "after_")
if target == "event" {
target = ""
callbackType = callbackAfterEvent
} else if _, ok := allEvents[target]; ok {
callbackType = callbackAfterEvent
}
default:
target = name
if _, ok := allStates[target]; ok {
callbackType = callbackEnterState
} else if _, ok := allEvents[target]; ok {
callbackType = callbackAfterEvent
}
}
if callbackType != callbackNone {
f.callbacks[cKey{target, callbackType}] = fn
}
}
return f
}
// Current returns the current state of the FSM.
func (f *FSM) Current() string {
f.stateMu.RLock()
defer f.stateMu.RUnlock()
return f.current
}
// Is returns true if state is the current state.
func (f *FSM) Is(state string) bool {
f.stateMu.RLock()
defer f.stateMu.RUnlock()
return state == f.current
}
// SetState allows the user to move to the given state from current state.
// The call does not trigger any callbacks, if defined.
func (f *FSM) SetState(state string) {
f.stateMu.Lock()
defer f.stateMu.Unlock()
f.current = state
return
}
// Can returns true if event can occur in the current state.
func (f *FSM) Can(event string) bool {
f.stateMu.RLock()
defer f.stateMu.RUnlock()
_, ok := f.transitions[eKey{event, f.current}]
return ok && (f.transition == nil)
}
// AvailableTransitions returns a list of transitions avilable in the
// current state.
func (f *FSM) AvailableTransitions() []string {
f.stateMu.RLock()
defer f.stateMu.RUnlock()
var transitions []string
for key := range f.transitions {
if key.src == f.current {
transitions = append(transitions, key.event)
}
}
return transitions
}
// Cannot returns true if event can not occure in the current state.
// It is a convenience method to help code read nicely.
func (f *FSM) Cannot(event string) bool {
return !f.Can(event)
}
// Event initiates a state transition with the named event.
//
// The call takes a variable number of arguments that will be passed to the
// callback, if defined.
//
// It will return nil if the state change is ok or one of these errors:
//
// - event X inappropriate because previous transition did not complete
//
// - event X inappropriate in current state Y
//
// - event X does not exist
//
// - internal error on state transition
//
// The last error should never occur in this situation and is a sign of an
// internal bug.
func (f *FSM) Event(event string, args ...interface{}) error {
f.eventMu.Lock()
defer f.eventMu.Unlock()
f.stateMu.RLock()
defer f.stateMu.RUnlock()
if f.transition != nil {
return InTransitionError{event}
}
dst, ok := f.transitions[eKey{event, f.current}]
if !ok {
for ekey := range f.transitions {
if ekey.event == event {
return InvalidEventError{event, f.current}
}
}
return UnknownEventError{event}
}
e := &Event{f, event, f.current, dst, nil, args, false, false}
err := f.beforeEventCallbacks(e)
if err != nil {
return err
}
if f.current == dst {
f.afterEventCallbacks(e)
return NoTransitionError{e.Err}
}
// Setup the transition, call it later.
f.transition = func() {
f.stateMu.Lock()
f.current = dst
f.stateMu.Unlock()
f.enterStateCallbacks(e)
f.afterEventCallbacks(e)
}
if err = f.leaveStateCallbacks(e); err != nil {
if _, ok := err.(CanceledError); ok {
f.transition = nil
}
return err
}
// Perform the rest of the transition, if not asynchronous.
f.stateMu.RUnlock()
err = f.doTransition()
f.stateMu.RLock()
if err != nil {
return InternalError{}
}
return e.Err
}
// Transition wraps transitioner.transition.
func (f *FSM) Transition() error {
f.eventMu.Lock()
defer f.eventMu.Unlock()
return f.doTransition()
}
// doTransition wraps transitioner.transition.
func (f *FSM) doTransition() error {
return f.transitionerObj.transition(f)
}
// transitionerStruct is the default implementation of the transitioner
// interface. Other implementations can be swapped in for testing.
type transitionerStruct struct{}
// Transition completes an asynchrounous state change.
//
// The callback for leave_<STATE> must prviously have called Async on its
// event to have initiated an asynchronous state transition.
func (t transitionerStruct) transition(f *FSM) error {
if f.transition == nil {
return NotInTransitionError{}
}
f.transition()
f.transition = nil
return nil
}
// beforeEventCallbacks calls the before_ callbacks, first the named then the
// general version.
func (f *FSM) beforeEventCallbacks(e *Event) error {
if fn, ok := f.callbacks[cKey{e.Event, callbackBeforeEvent}]; ok {
fn(e)
if e.canceled {
return CanceledError{e.Err}
}
}
if fn, ok := f.callbacks[cKey{"", callbackBeforeEvent}]; ok {
fn(e)
if e.canceled {
return CanceledError{e.Err}
}
}
return nil
}
// leaveStateCallbacks calls the leave_ callbacks, first the named then the
// general version.
func (f *FSM) leaveStateCallbacks(e *Event) error {
if fn, ok := f.callbacks[cKey{f.current, callbackLeaveState}]; ok {
fn(e)
if e.canceled {
return CanceledError{e.Err}
} else if e.async {
return AsyncError{e.Err}
}
}
if fn, ok := f.callbacks[cKey{"", callbackLeaveState}]; ok {
fn(e)
if e.canceled {
return CanceledError{e.Err}
} else if e.async {
return AsyncError{e.Err}
}
}
return nil
}
// enterStateCallbacks calls the enter_ callbacks, first the named then the
// general version.
func (f *FSM) enterStateCallbacks(e *Event) {
if fn, ok := f.callbacks[cKey{f.current, callbackEnterState}]; ok {
fn(e)
}
if fn, ok := f.callbacks[cKey{"", callbackEnterState}]; ok {
fn(e)
}
}
// afterEventCallbacks calls the after_ callbacks, first the named then the
// general version.
func (f *FSM) afterEventCallbacks(e *Event) {
if fn, ok := f.callbacks[cKey{e.Event, callbackAfterEvent}]; ok {
fn(e)
}
if fn, ok := f.callbacks[cKey{"", callbackAfterEvent}]; ok {
fn(e)
}
}
const (
callbackNone int = iota
callbackBeforeEvent
callbackLeaveState
callbackEnterState
callbackAfterEvent
)
// cKey is a struct key used for keeping the callbacks mapped to a target.
type cKey struct {
// target is either the name of a state or an event depending on which
// callback type the key refers to. It can also be "" for a non-targeted
// callback like before_event.
target string
// callbackType is the situation when the callback will be run.
callbackType int
}
// eKey is a struct key used for storing the transition map.
type eKey struct {
// event is the name of the event that the keys refers to.
event string
// src is the source from where the event can transition.
src string
}

45
vendor/github.com/looplab/fsm/utils.go generated vendored Normal file
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package fsm
import (
"bytes"
"fmt"
)
// Visualize outputs a visualization of a FSM in Graphviz format.
func Visualize(fsm *FSM) string {
var buf bytes.Buffer
states := make(map[string]int)
buf.WriteString(fmt.Sprintf(`digraph fsm {`))
buf.WriteString("\n")
// make sure the initial state is at top
for k, v := range fsm.transitions {
if k.src == fsm.current {
states[k.src]++
states[v]++
buf.WriteString(fmt.Sprintf(` "%s" -> "%s" [ label = "%s" ];`, k.src, v, k.event))
buf.WriteString("\n")
}
}
for k, v := range fsm.transitions {
if k.src != fsm.current {
states[k.src]++
states[v]++
buf.WriteString(fmt.Sprintf(` "%s" -> "%s" [ label = "%s" ];`, k.src, v, k.event))
buf.WriteString("\n")
}
}
buf.WriteString("\n")
for k := range states {
buf.WriteString(fmt.Sprintf(` "%s";`, k))
buf.WriteString("\n")
}
buf.WriteString(fmt.Sprintln("}"))
return buf.String()
}

21
vendor/github.com/opentracing/basictracer-go/LICENSE generated vendored Normal file
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@ -0,0 +1,21 @@
The MIT License (MIT)
Copyright (c) 2016 The OpenTracing Authors
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.

42
vendor/github.com/opentracing/basictracer-go/context.go generated vendored Normal file
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package basictracer
// SpanContext holds the basic Span metadata.
type SpanContext struct {
// A probabilistically unique identifier for a [multi-span] trace.
TraceID uint64
// A probabilistically unique identifier for a span.
SpanID uint64
// Whether the trace is sampled.
Sampled bool
// The span's associated baggage.
Baggage map[string]string // initialized on first use
}
// ForeachBaggageItem belongs to the opentracing.SpanContext interface
func (c SpanContext) ForeachBaggageItem(handler func(k, v string) bool) {
for k, v := range c.Baggage {
if !handler(k, v) {
break
}
}
}
// WithBaggageItem returns an entirely new basictracer SpanContext with the
// given key:value baggage pair set.
func (c SpanContext) WithBaggageItem(key, val string) SpanContext {
var newBaggage map[string]string
if c.Baggage == nil {
newBaggage = map[string]string{key: val}
} else {
newBaggage = make(map[string]string, len(c.Baggage)+1)
for k, v := range c.Baggage {
newBaggage[k] = v
}
newBaggage[key] = val
}
// Use positional parameters so the compiler will help catch new fields.
return SpanContext{c.TraceID, c.SpanID, c.Sampled, newBaggage}
}

78
vendor/github.com/opentracing/basictracer-go/debug.go generated vendored Normal file
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@ -0,0 +1,78 @@
package basictracer
import (
"bytes"
"fmt"
"runtime"
"strconv"
"sync"
)
const debugGoroutineIDTag = "_initial_goroutine"
type errAssertionFailed struct {
span *spanImpl
msg string
}
// Error implements the error interface.
func (err *errAssertionFailed) Error() string {
return fmt.Sprintf("%s:\n%+v", err.msg, err.span)
}
func (s *spanImpl) Lock() {
s.Mutex.Lock()
s.maybeAssertSanityLocked()
}
func (s *spanImpl) maybeAssertSanityLocked() {
if s.tracer == nil {
s.Mutex.Unlock()
panic(&errAssertionFailed{span: s, msg: "span used after call to Finish()"})
}
if s.tracer.options.DebugAssertSingleGoroutine {
startID := curGoroutineID()
curID, ok := s.raw.Tags[debugGoroutineIDTag].(uint64)
if !ok {
// This is likely invoked in the context of the SetTag which sets
// debugGoroutineTag.
return
}
if startID != curID {
s.Mutex.Unlock()
panic(&errAssertionFailed{
span: s,
msg: fmt.Sprintf("span started on goroutine %d, but now running on %d", startID, curID),
})
}
}
}
var goroutineSpace = []byte("goroutine ")
var littleBuf = sync.Pool{
New: func() interface{} {
buf := make([]byte, 64)
return &buf
},
}
// Credit to @bradfitz:
// https://github.com/golang/net/blob/master/http2/gotrack.go#L51
func curGoroutineID() uint64 {
bp := littleBuf.Get().(*[]byte)
defer littleBuf.Put(bp)
b := *bp
b = b[:runtime.Stack(b, false)]
// Parse the 4707 out of "goroutine 4707 ["
b = bytes.TrimPrefix(b, goroutineSpace)
i := bytes.IndexByte(b, ' ')
if i < 0 {
panic(fmt.Sprintf("No space found in %q", b))
}
b = b[:i]
n, err := strconv.ParseUint(string(b), 10, 64)
if err != nil {
panic(fmt.Sprintf("Failed to parse goroutine ID out of %q: %v", b, err))
}
return n
}

62
vendor/github.com/opentracing/basictracer-go/event.go generated vendored Normal file
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@ -0,0 +1,62 @@
package basictracer
import "github.com/opentracing/opentracing-go"
// A SpanEvent is emitted when a mutating command is called on a Span.
type SpanEvent interface{}
// EventCreate is emitted when a Span is created.
type EventCreate struct{ OperationName string }
// EventTag is received when SetTag is called.
type EventTag struct {
Key string
Value interface{}
}
// EventBaggage is received when SetBaggageItem is called.
type EventBaggage struct {
Key, Value string
}
// EventLogFields is received when LogFields or LogKV is called.
type EventLogFields opentracing.LogRecord
// EventLog is received when Log (or one of its derivatives) is called.
//
// DEPRECATED
type EventLog opentracing.LogData
// EventFinish is received when Finish is called.
type EventFinish RawSpan
func (s *spanImpl) onCreate(opName string) {
if s.event != nil {
s.event(EventCreate{OperationName: opName})
}
}
func (s *spanImpl) onTag(key string, value interface{}) {
if s.event != nil {
s.event(EventTag{Key: key, Value: value})
}
}
func (s *spanImpl) onLog(ld opentracing.LogData) {
if s.event != nil {
s.event(EventLog(ld))
}
}
func (s *spanImpl) onLogFields(lr opentracing.LogRecord) {
if s.event != nil {
s.event(EventLogFields(lr))
}
}
func (s *spanImpl) onBaggage(key, value string) {
if s.event != nil {
s.event(EventBaggage{Key: key, Value: value})
}
}
func (s *spanImpl) onFinish(sp RawSpan) {
if s.event != nil {
s.event(EventFinish(sp))
}
}

61
vendor/github.com/opentracing/basictracer-go/propagation.go generated vendored Normal file
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@ -0,0 +1,61 @@
package basictracer
import opentracing "github.com/opentracing/opentracing-go"
type accessorPropagator struct {
tracer *tracerImpl
}
// DelegatingCarrier is a flexible carrier interface which can be implemented
// by types which have a means of storing the trace metadata and already know
// how to serialize themselves (for example, protocol buffers).
type DelegatingCarrier interface {
SetState(traceID, spanID uint64, sampled bool)
State() (traceID, spanID uint64, sampled bool)
SetBaggageItem(key, value string)
GetBaggage(func(key, value string))
}
func (p *accessorPropagator) Inject(
spanContext opentracing.SpanContext,
carrier interface{},
) error {
dc, ok := carrier.(DelegatingCarrier)
if !ok || dc == nil {
return opentracing.ErrInvalidCarrier
}
sc, ok := spanContext.(SpanContext)
if !ok {
return opentracing.ErrInvalidSpanContext
}
dc.SetState(sc.TraceID, sc.SpanID, sc.Sampled)
for k, v := range sc.Baggage {
dc.SetBaggageItem(k, v)
}
return nil
}
func (p *accessorPropagator) Extract(
carrier interface{},
) (opentracing.SpanContext, error) {
dc, ok := carrier.(DelegatingCarrier)
if !ok || dc == nil {
return nil, opentracing.ErrInvalidCarrier
}
traceID, spanID, sampled := dc.State()
sc := SpanContext{
TraceID: traceID,
SpanID: spanID,
Sampled: sampled,
Baggage: nil,
}
dc.GetBaggage(func(k, v string) {
if sc.Baggage == nil {
sc.Baggage = map[string]string{}
}
sc.Baggage[k] = v
})
return sc, nil
}

180
vendor/github.com/opentracing/basictracer-go/propagation_ot.go generated vendored Normal file
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@ -0,0 +1,180 @@
package basictracer
import (
"encoding/binary"
"io"
"strconv"
"strings"
"github.com/gogo/protobuf/proto"
"github.com/opentracing/basictracer-go/wire"
opentracing "github.com/opentracing/opentracing-go"
)
type textMapPropagator struct {
tracer *tracerImpl
}
type binaryPropagator struct {
tracer *tracerImpl
}
const (
prefixTracerState = "ot-tracer-"
prefixBaggage = "ot-baggage-"
tracerStateFieldCount = 3
fieldNameTraceID = prefixTracerState + "traceid"
fieldNameSpanID = prefixTracerState + "spanid"
fieldNameSampled = prefixTracerState + "sampled"
)
func (p *textMapPropagator) Inject(
spanContext opentracing.SpanContext,
opaqueCarrier interface{},
) error {
sc, ok := spanContext.(SpanContext)
if !ok {
return opentracing.ErrInvalidSpanContext
}
carrier, ok := opaqueCarrier.(opentracing.TextMapWriter)
if !ok {
return opentracing.ErrInvalidCarrier
}
carrier.Set(fieldNameTraceID, strconv.FormatUint(sc.TraceID, 16))
carrier.Set(fieldNameSpanID, strconv.FormatUint(sc.SpanID, 16))
carrier.Set(fieldNameSampled, strconv.FormatBool(sc.Sampled))
for k, v := range sc.Baggage {
carrier.Set(prefixBaggage+k, v)
}
return nil
}
func (p *textMapPropagator) Extract(
opaqueCarrier interface{},
) (opentracing.SpanContext, error) {
carrier, ok := opaqueCarrier.(opentracing.TextMapReader)
if !ok {
return nil, opentracing.ErrInvalidCarrier
}
requiredFieldCount := 0
var traceID, spanID uint64
var sampled bool
var err error
decodedBaggage := make(map[string]string)
err = carrier.ForeachKey(func(k, v string) error {
switch strings.ToLower(k) {
case fieldNameTraceID:
traceID, err = strconv.ParseUint(v, 16, 64)
if err != nil {
return opentracing.ErrSpanContextCorrupted
}
case fieldNameSpanID:
spanID, err = strconv.ParseUint(v, 16, 64)
if err != nil {
return opentracing.ErrSpanContextCorrupted
}
case fieldNameSampled:
sampled, err = strconv.ParseBool(v)
if err != nil {
return opentracing.ErrSpanContextCorrupted
}
default:
lowercaseK := strings.ToLower(k)
if strings.HasPrefix(lowercaseK, prefixBaggage) {
decodedBaggage[strings.TrimPrefix(lowercaseK, prefixBaggage)] = v
}
// Balance off the requiredFieldCount++ just below...
requiredFieldCount--
}
requiredFieldCount++
return nil
})
if err != nil {
return nil, err
}
if requiredFieldCount < tracerStateFieldCount {
if requiredFieldCount == 0 {
return nil, opentracing.ErrSpanContextNotFound
}
return nil, opentracing.ErrSpanContextCorrupted
}
return SpanContext{
TraceID: traceID,
SpanID: spanID,
Sampled: sampled,
Baggage: decodedBaggage,
}, nil
}
func (p *binaryPropagator) Inject(
spanContext opentracing.SpanContext,
opaqueCarrier interface{},
) error {
sc, ok := spanContext.(SpanContext)
if !ok {
return opentracing.ErrInvalidSpanContext
}
carrier, ok := opaqueCarrier.(io.Writer)
if !ok {
return opentracing.ErrInvalidCarrier
}
state := wire.TracerState{}
state.TraceId = sc.TraceID
state.SpanId = sc.SpanID
state.Sampled = sc.Sampled
state.BaggageItems = sc.Baggage
b, err := proto.Marshal(&state)
if err != nil {
return err
}
// Write the length of the marshalled binary to the writer.
length := uint32(len(b))
if err := binary.Write(carrier, binary.BigEndian, &length); err != nil {
return err
}
_, err = carrier.Write(b)
return err
}
func (p *binaryPropagator) Extract(
opaqueCarrier interface{},
) (opentracing.SpanContext, error) {
carrier, ok := opaqueCarrier.(io.Reader)
if !ok {
return nil, opentracing.ErrInvalidCarrier
}
// Read the length of marshalled binary. io.ReadAll isn't that performant
// since it keeps resizing the underlying buffer as it encounters more bytes
// to read. By reading the length, we can allocate a fixed sized buf and read
// the exact amount of bytes into it.
var length uint32
if err := binary.Read(carrier, binary.BigEndian, &length); err != nil {
return nil, opentracing.ErrSpanContextCorrupted
}
buf := make([]byte, length)
if n, err := carrier.Read(buf); err != nil {
if n > 0 {
return nil, opentracing.ErrSpanContextCorrupted
}
return nil, opentracing.ErrSpanContextNotFound
}
ctx := wire.TracerState{}
if err := proto.Unmarshal(buf, &ctx); err != nil {
return nil, opentracing.ErrSpanContextCorrupted
}
return SpanContext{
TraceID: ctx.TraceId,
SpanID: ctx.SpanId,
Sampled: ctx.Sampled,
Baggage: ctx.BaggageItems,
}, nil
}

34
vendor/github.com/opentracing/basictracer-go/raw.go generated vendored Normal file
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@ -0,0 +1,34 @@
package basictracer
import (
"time"
opentracing "github.com/opentracing/opentracing-go"
)
// RawSpan encapsulates all state associated with a (finished) Span.
type RawSpan struct {
// Those recording the RawSpan should also record the contents of its
// SpanContext.
Context SpanContext
// The SpanID of this SpanContext's first intra-trace reference (i.e.,
// "parent"), or 0 if there is no parent.
ParentSpanID uint64
// The name of the "operation" this span is an instance of. (Called a "span
// name" in some implementations)
Operation string
// We store <start, duration> rather than <start, end> so that only
// one of the timestamps has global clock uncertainty issues.
Start time.Time
Duration time.Duration
// Essentially an extension mechanism. Can be used for many purposes,
// not to be enumerated here.
Tags opentracing.Tags
// The span's "microlog".
Logs []opentracing.LogRecord
}

60
vendor/github.com/opentracing/basictracer-go/recorder.go generated vendored Normal file
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@ -0,0 +1,60 @@
package basictracer
import "sync"
// A SpanRecorder handles all of the `RawSpan` data generated via an
// associated `Tracer` (see `NewStandardTracer`) instance. It also names
// the containing process and provides access to a straightforward tag map.
type SpanRecorder interface {
// Implementations must determine whether and where to store `span`.
RecordSpan(span RawSpan)
}
// InMemorySpanRecorder is a simple thread-safe implementation of
// SpanRecorder that stores all reported spans in memory, accessible
// via reporter.GetSpans(). It is primarily intended for testing purposes.
type InMemorySpanRecorder struct {
sync.RWMutex
spans []RawSpan
}
// NewInMemoryRecorder creates new InMemorySpanRecorder
func NewInMemoryRecorder() *InMemorySpanRecorder {
return new(InMemorySpanRecorder)
}
// RecordSpan implements the respective method of SpanRecorder.
func (r *InMemorySpanRecorder) RecordSpan(span RawSpan) {
r.Lock()
defer r.Unlock()
r.spans = append(r.spans, span)
}
// GetSpans returns a copy of the array of spans accumulated so far.
func (r *InMemorySpanRecorder) GetSpans() []RawSpan {
r.RLock()
defer r.RUnlock()
spans := make([]RawSpan, len(r.spans))
copy(spans, r.spans)
return spans
}
// GetSampledSpans returns a slice of spans accumulated so far which were sampled.
func (r *InMemorySpanRecorder) GetSampledSpans() []RawSpan {
r.RLock()
defer r.RUnlock()
spans := make([]RawSpan, 0, len(r.spans))
for _, span := range r.spans {
if span.Context.Sampled {
spans = append(spans, span)
}
}
return spans
}
// Reset clears the internal array of spans.
func (r *InMemorySpanRecorder) Reset() {
r.Lock()
defer r.Unlock()
r.spans = nil
}

274
vendor/github.com/opentracing/basictracer-go/span.go generated vendored Normal file
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package basictracer
import (
"sync"
"time"
opentracing "github.com/opentracing/opentracing-go"
"github.com/opentracing/opentracing-go/ext"
"github.com/opentracing/opentracing-go/log"
)
// Span provides access to the essential details of the span, for use
// by basictracer consumers. These methods may only be called prior
// to (*opentracing.Span).Finish().
type Span interface {
opentracing.Span
// Operation names the work done by this span instance
Operation() string
// Start indicates when the span began
Start() time.Time
}
// Implements the `Span` interface. Created via tracerImpl (see
// `basictracer.New()`).
type spanImpl struct {
tracer *tracerImpl
event func(SpanEvent)
sync.Mutex // protects the fields below
raw RawSpan
// The number of logs dropped because of MaxLogsPerSpan.
numDroppedLogs int
}
var spanPool = &sync.Pool{New: func() interface{} {
return &spanImpl{}
}}
func (s *spanImpl) reset() {
s.tracer, s.event = nil, nil
// Note: Would like to do the following, but then the consumer of RawSpan
// (the recorder) needs to make sure that they're not holding on to the
// baggage or logs when they return (i.e. they need to copy if they care):
//
// logs, baggage := s.raw.Logs[:0], s.raw.Baggage
// for k := range baggage {
// delete(baggage, k)
// }
// s.raw.Logs, s.raw.Baggage = logs, baggage
//
// That's likely too much to ask for. But there is some magic we should
// be able to do with `runtime.SetFinalizer` to reclaim that memory into
// a buffer pool when GC considers them unreachable, which should ease
// some of the load. Hard to say how quickly that would be in practice
// though.
s.raw = RawSpan{
Context: SpanContext{},
}
}
func (s *spanImpl) SetOperationName(operationName string) opentracing.Span {
s.Lock()
defer s.Unlock()
s.raw.Operation = operationName
return s
}
func (s *spanImpl) trim() bool {
return !s.raw.Context.Sampled && s.tracer.options.TrimUnsampledSpans
}
func (s *spanImpl) SetTag(key string, value interface{}) opentracing.Span {
defer s.onTag(key, value)
s.Lock()
defer s.Unlock()
if key == string(ext.SamplingPriority) {
if v, ok := value.(uint16); ok {
s.raw.Context.Sampled = v != 0
return s
}
}
if s.trim() {
return s
}
if s.raw.Tags == nil {
s.raw.Tags = opentracing.Tags{}
}
s.raw.Tags[key] = value
return s
}
func (s *spanImpl) LogKV(keyValues ...interface{}) {
fields, err := log.InterleavedKVToFields(keyValues...)
if err != nil {
s.LogFields(log.Error(err), log.String("function", "LogKV"))
return
}
s.LogFields(fields...)
}
func (s *spanImpl) appendLog(lr opentracing.LogRecord) {
maxLogs := s.tracer.options.MaxLogsPerSpan
if maxLogs == 0 || len(s.raw.Logs) < maxLogs {
s.raw.Logs = append(s.raw.Logs, lr)
return
}
// We have too many logs. We don't touch the first numOld logs; we treat the
// rest as a circular buffer and overwrite the oldest log among those.
numOld := (maxLogs - 1) / 2
numNew := maxLogs - numOld
s.raw.Logs[numOld+s.numDroppedLogs%numNew] = lr
s.numDroppedLogs++
}
func (s *spanImpl) LogFields(fields ...log.Field) {
lr := opentracing.LogRecord{
Fields: fields,
}
defer s.onLogFields(lr)
s.Lock()
defer s.Unlock()
if s.trim() || s.tracer.options.DropAllLogs {
return
}
if lr.Timestamp.IsZero() {
lr.Timestamp = time.Now()
}
s.appendLog(lr)
}
func (s *spanImpl) LogEvent(event string) {
s.Log(opentracing.LogData{
Event: event,
})
}
func (s *spanImpl) LogEventWithPayload(event string, payload interface{}) {
s.Log(opentracing.LogData{
Event: event,
Payload: payload,
})
}
func (s *spanImpl) Log(ld opentracing.LogData) {
defer s.onLog(ld)
s.Lock()
defer s.Unlock()
if s.trim() || s.tracer.options.DropAllLogs {
return
}
if ld.Timestamp.IsZero() {
ld.Timestamp = time.Now()
}
s.appendLog(ld.ToLogRecord())
}
func (s *spanImpl) Finish() {
s.FinishWithOptions(opentracing.FinishOptions{})
}
// rotateLogBuffer rotates the records in the buffer: records 0 to pos-1 move at
// the end (i.e. pos circular left shifts).
func rotateLogBuffer(buf []opentracing.LogRecord, pos int) {
// This algorithm is described in:
// http://www.cplusplus.com/reference/algorithm/rotate
for first, middle, next := 0, pos, pos; first != middle; {
buf[first], buf[next] = buf[next], buf[first]
first++
next++
if next == len(buf) {
next = middle
} else if first == middle {
middle = next
}
}
}
func (s *spanImpl) FinishWithOptions(opts opentracing.FinishOptions) {
finishTime := opts.FinishTime
if finishTime.IsZero() {
finishTime = time.Now()
}
duration := finishTime.Sub(s.raw.Start)
s.Lock()
defer s.Unlock()
for _, lr := range opts.LogRecords {
s.appendLog(lr)
}
for _, ld := range opts.BulkLogData {
s.appendLog(ld.ToLogRecord())
}
if s.numDroppedLogs > 0 {
// We dropped some log events, which means that we used part of Logs as a
// circular buffer (see appendLog). De-circularize it.
numOld := (len(s.raw.Logs) - 1) / 2
numNew := len(s.raw.Logs) - numOld
rotateLogBuffer(s.raw.Logs[numOld:], s.numDroppedLogs%numNew)
// Replace the log in the middle (the oldest "new" log) with information
// about the dropped logs. This means that we are effectively dropping one
// more "new" log.
numDropped := s.numDroppedLogs + 1
s.raw.Logs[numOld] = opentracing.LogRecord{
// Keep the timestamp of the last dropped event.
Timestamp: s.raw.Logs[numOld].Timestamp,
Fields: []log.Field{
log.String("event", "dropped Span logs"),
log.Int("dropped_log_count", numDropped),
log.String("component", "basictracer"),
},
}
}
s.raw.Duration = duration
s.onFinish(s.raw)
s.tracer.options.Recorder.RecordSpan(s.raw)
// Last chance to get options before the span is possibly reset.
poolEnabled := s.tracer.options.EnableSpanPool
if s.tracer.options.DebugAssertUseAfterFinish {
// This makes it much more likely to catch a panic on any subsequent
// operation since s.tracer is accessed on every call to `Lock`.
// We don't call `reset()` here to preserve the logs in the Span
// which are printed when the assertion triggers.
s.tracer = nil
}
if poolEnabled {
spanPool.Put(s)
}
}
func (s *spanImpl) Tracer() opentracing.Tracer {
return s.tracer
}
func (s *spanImpl) Context() opentracing.SpanContext {
return s.raw.Context
}
func (s *spanImpl) SetBaggageItem(key, val string) opentracing.Span {
s.onBaggage(key, val)
if s.trim() {
return s
}
s.Lock()
defer s.Unlock()
s.raw.Context = s.raw.Context.WithBaggageItem(key, val)
return s
}
func (s *spanImpl) BaggageItem(key string) string {
s.Lock()
defer s.Unlock()
return s.raw.Context.Baggage[key]
}
func (s *spanImpl) Operation() string {
return s.raw.Operation
}
func (s *spanImpl) Start() time.Time {
return s.raw.Start
}

262
vendor/github.com/opentracing/basictracer-go/tracer.go generated vendored Normal file
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package basictracer
import (
"time"
opentracing "github.com/opentracing/opentracing-go"
)
// Tracer extends the opentracing.Tracer interface with methods to
// probe implementation state, for use by basictracer consumers.
type Tracer interface {
opentracing.Tracer
// Options gets the Options used in New() or NewWithOptions().
Options() Options
}
// Options allows creating a customized Tracer via NewWithOptions. The object
// must not be updated when there is an active tracer using it.
type Options struct {
// ShouldSample is a function which is called when creating a new Span and
// determines whether that Span is sampled. The randomized TraceID is supplied
// to allow deterministic sampling decisions to be made across different nodes.
// For example,
//
// func(traceID uint64) { return traceID % 64 == 0 }
//
// samples every 64th trace on average.
ShouldSample func(traceID uint64) bool
// TrimUnsampledSpans turns potentially expensive operations on unsampled
// Spans into no-ops. More precisely, tags and log events are silently
// discarded. If NewSpanEventListener is set, the callbacks will still fire.
TrimUnsampledSpans bool
// Recorder receives Spans which have been finished.
Recorder SpanRecorder
// NewSpanEventListener can be used to enhance the tracer by effectively
// attaching external code to trace events. See NetTraceIntegrator for a
// practical example, and event.go for the list of possible events.
NewSpanEventListener func() func(SpanEvent)
// DropAllLogs turns log events on all Spans into no-ops.
// If NewSpanEventListener is set, the callbacks will still fire.
DropAllLogs bool
// MaxLogsPerSpan limits the number of Logs in a span (if set to a nonzero
// value). If a span has more logs than this value, logs are dropped as
// necessary (and replaced with a log describing how many were dropped).
//
// About half of the MaxLogPerSpan logs kept are the oldest logs, and about
// half are the newest logs.
//
// If NewSpanEventListener is set, the callbacks will still fire for all log
// events. This value is ignored if DropAllLogs is true.
MaxLogsPerSpan int
// DebugAssertSingleGoroutine internally records the ID of the goroutine
// creating each Span and verifies that no operation is carried out on
// it on a different goroutine.
// Provided strictly for development purposes.
// Passing Spans between goroutine without proper synchronization often
// results in use-after-Finish() errors. For a simple example, consider the
// following pseudocode:
//
// func (s *Server) Handle(req http.Request) error {
// sp := s.StartSpan("server")
// defer sp.Finish()
// wait := s.queueProcessing(opentracing.ContextWithSpan(context.Background(), sp), req)
// select {
// case resp := <-wait:
// return resp.Error
// case <-time.After(10*time.Second):
// sp.LogEvent("timed out waiting for processing")
// return ErrTimedOut
// }
// }
//
// This looks reasonable at first, but a request which spends more than ten
// seconds in the queue is abandoned by the main goroutine and its trace
// finished, leading to use-after-finish when the request is finally
// processed. Note also that even joining on to a finished Span via
// StartSpanWithOptions constitutes an illegal operation.
//
// Code bases which do not require (or decide they do not want) Spans to
// be passed across goroutine boundaries can run with this flag enabled in
// tests to increase their chances of spotting wrong-doers.
DebugAssertSingleGoroutine bool
// DebugAssertUseAfterFinish is provided strictly for development purposes.
// When set, it attempts to exacerbate issues emanating from use of Spans
// after calling Finish by running additional assertions.
DebugAssertUseAfterFinish bool
// EnableSpanPool enables the use of a pool, so that the tracer reuses spans
// after Finish has been called on it. Adds a slight performance gain as it
// reduces allocations. However, if you have any use-after-finish race
// conditions the code may panic.
EnableSpanPool bool
}
// DefaultOptions returns an Options object with a 1 in 64 sampling rate and
// all options disabled. A Recorder needs to be set manually before using the
// returned object with a Tracer.
func DefaultOptions() Options {
return Options{
ShouldSample: func(traceID uint64) bool { return traceID%64 == 0 },
MaxLogsPerSpan: 100,
}
}
// NewWithOptions creates a customized Tracer.
func NewWithOptions(opts Options) opentracing.Tracer {
rval := &tracerImpl{options: opts}
rval.textPropagator = &textMapPropagator{rval}
rval.binaryPropagator = &binaryPropagator{rval}
rval.accessorPropagator = &accessorPropagator{rval}
return rval
}
// New creates and returns a standard Tracer which defers completed Spans to
// `recorder`.
// Spans created by this Tracer support the ext.SamplingPriority tag: Setting
// ext.SamplingPriority causes the Span to be Sampled from that point on.
func New(recorder SpanRecorder) opentracing.Tracer {
opts := DefaultOptions()
opts.Recorder = recorder
return NewWithOptions(opts)
}
// Implements the `Tracer` interface.
type tracerImpl struct {
options Options
textPropagator *textMapPropagator
binaryPropagator *binaryPropagator
accessorPropagator *accessorPropagator
}
func (t *tracerImpl) StartSpan(
operationName string,
opts ...opentracing.StartSpanOption,
) opentracing.Span {
sso := opentracing.StartSpanOptions{}
for _, o := range opts {
o.Apply(&sso)
}
return t.StartSpanWithOptions(operationName, sso)
}
func (t *tracerImpl) getSpan() *spanImpl {
if t.options.EnableSpanPool {
sp := spanPool.Get().(*spanImpl)
sp.reset()
return sp
}
return &spanImpl{}
}
func (t *tracerImpl) StartSpanWithOptions(
operationName string,
opts opentracing.StartSpanOptions,
) opentracing.Span {
// Start time.
startTime := opts.StartTime
if startTime.IsZero() {
startTime = time.Now()
}
// Tags.
tags := opts.Tags
// Build the new span. This is the only allocation: We'll return this as
// an opentracing.Span.
sp := t.getSpan()
// Look for a parent in the list of References.
//
// TODO: would be nice if basictracer did something with all
// References, not just the first one.
ReferencesLoop:
for _, ref := range opts.References {
switch ref.Type {
case opentracing.ChildOfRef,
opentracing.FollowsFromRef:
refCtx := ref.ReferencedContext.(SpanContext)
sp.raw.Context.TraceID = refCtx.TraceID
sp.raw.Context.SpanID = randomID()
sp.raw.Context.Sampled = refCtx.Sampled
sp.raw.ParentSpanID = refCtx.SpanID
if l := len(refCtx.Baggage); l > 0 {
sp.raw.Context.Baggage = make(map[string]string, l)
for k, v := range refCtx.Baggage {
sp.raw.Context.Baggage[k] = v
}
}
break ReferencesLoop
}
}
if sp.raw.Context.TraceID == 0 {
// No parent Span found; allocate new trace and span ids and determine
// the Sampled status.
sp.raw.Context.TraceID, sp.raw.Context.SpanID = randomID2()
sp.raw.Context.Sampled = t.options.ShouldSample(sp.raw.Context.TraceID)
}
return t.startSpanInternal(
sp,
operationName,
startTime,
tags,
)
}
func (t *tracerImpl) startSpanInternal(
sp *spanImpl,
operationName string,
startTime time.Time,
tags opentracing.Tags,
) opentracing.Span {
sp.tracer = t
if t.options.NewSpanEventListener != nil {
sp.event = t.options.NewSpanEventListener()
}
sp.raw.Operation = operationName
sp.raw.Start = startTime
sp.raw.Duration = -1
sp.raw.Tags = tags
if t.options.DebugAssertSingleGoroutine {
sp.SetTag(debugGoroutineIDTag, curGoroutineID())
}
defer sp.onCreate(operationName)
return sp
}
type delegatorType struct{}
// Delegator is the format to use for DelegatingCarrier.
var Delegator delegatorType
func (t *tracerImpl) Inject(sc opentracing.SpanContext, format interface{}, carrier interface{}) error {
switch format {
case opentracing.TextMap, opentracing.HTTPHeaders:
return t.textPropagator.Inject(sc, carrier)
case opentracing.Binary:
return t.binaryPropagator.Inject(sc, carrier)
}
if _, ok := format.(delegatorType); ok {
return t.accessorPropagator.Inject(sc, carrier)
}
return opentracing.ErrUnsupportedFormat
}
func (t *tracerImpl) Extract(format interface{}, carrier interface{}) (opentracing.SpanContext, error) {
switch format {
case opentracing.TextMap, opentracing.HTTPHeaders:
return t.textPropagator.Extract(carrier)
case opentracing.Binary:
return t.binaryPropagator.Extract(carrier)
}
if _, ok := format.(delegatorType); ok {
return t.accessorPropagator.Extract(carrier)
}
return nil, opentracing.ErrUnsupportedFormat
}
func (t *tracerImpl) Options() Options {
return t.options
}

25
vendor/github.com/opentracing/basictracer-go/util.go generated vendored Normal file
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package basictracer
import (
"math/rand"
"sync"
"time"
)
var (
seededIDGen = rand.New(rand.NewSource(time.Now().UnixNano()))
// The golang rand generators are *not* intrinsically thread-safe.
seededIDLock sync.Mutex
)
func randomID() uint64 {
seededIDLock.Lock()
defer seededIDLock.Unlock()
return uint64(seededIDGen.Int63())
}
func randomID2() (uint64, uint64) {
seededIDLock.Lock()
defer seededIDLock.Unlock()
return uint64(seededIDGen.Int63()), uint64(seededIDGen.Int63())
}

40
vendor/github.com/opentracing/basictracer-go/wire/carrier.go generated vendored Normal file
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package wire
// ProtobufCarrier is a DelegatingCarrier that uses protocol buffers as the
// the underlying datastructure. The reason for implementing DelagatingCarrier
// is to allow for end users to serialize the underlying protocol buffers using
// jsonpb or any other serialization forms they want.
type ProtobufCarrier TracerState
// SetState set's the tracer state.
func (p *ProtobufCarrier) SetState(traceID, spanID uint64, sampled bool) {
p.TraceId = traceID
p.SpanId = spanID
p.Sampled = sampled
}
// State returns the tracer state.
func (p *ProtobufCarrier) State() (traceID, spanID uint64, sampled bool) {
traceID = p.TraceId
spanID = p.SpanId
sampled = p.Sampled
return traceID, spanID, sampled
}
// SetBaggageItem sets a baggage item.
func (p *ProtobufCarrier) SetBaggageItem(key, value string) {
if p.BaggageItems == nil {
p.BaggageItems = map[string]string{key: value}
return
}
p.BaggageItems[key] = value
}
// GetBaggage iterates over each baggage item and executes the callback with
// the key:value pair.
func (p *ProtobufCarrier) GetBaggage(f func(k, v string)) {
for k, v := range p.BaggageItems {
f(k, v)
}
}

6
vendor/github.com/opentracing/basictracer-go/wire/gen.go generated vendored Normal file
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package wire
//go:generate protoc --gogofaster_out=$GOPATH/src/github.com/opentracing/basictracer-go/wire wire.proto
// Run `go get github.com/gogo/protobuf/protoc-gen-gogofaster` to install the
// gogofaster generator binary.

508
vendor/github.com/opentracing/basictracer-go/wire/wire.pb.go generated vendored Normal file
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// Code generated by protoc-gen-gogo.
// source: wire.proto
// DO NOT EDIT!
/*
Package wire is a generated protocol buffer package.
It is generated from these files:
wire.proto
It has these top-level messages:
TracerState
*/
package wire
import proto "github.com/gogo/protobuf/proto"
import fmt "fmt"
import math "math"
import io "io"
// Reference imports to suppress errors if they are not otherwise used.
var _ = proto.Marshal
var _ = fmt.Errorf
var _ = math.Inf
// This is a compile-time assertion to ensure that this generated file
// is compatible with the proto package it is being compiled against.
const _ = proto.GoGoProtoPackageIsVersion1
type TracerState struct {
TraceId uint64 `protobuf:"fixed64,1,opt,name=trace_id,json=traceId,proto3" json:"trace_id,omitempty"`
SpanId uint64 `protobuf:"fixed64,2,opt,name=span_id,json=spanId,proto3" json:"span_id,omitempty"`
Sampled bool `protobuf:"varint,3,opt,name=sampled,proto3" json:"sampled,omitempty"`
BaggageItems map[string]string `protobuf:"bytes,4,rep,name=baggage_items,json=baggageItems" json:"baggage_items,omitempty" protobuf_key:"bytes,1,opt,name=key,proto3" protobuf_val:"bytes,2,opt,name=value,proto3"`
}
func (m *TracerState) Reset() { *m = TracerState{} }
func (m *TracerState) String() string { return proto.CompactTextString(m) }
func (*TracerState) ProtoMessage() {}
func (*TracerState) Descriptor() ([]byte, []int) { return fileDescriptorWire, []int{0} }
func (m *TracerState) GetBaggageItems() map[string]string {
if m != nil {
return m.BaggageItems
}
return nil
}
func init() {
proto.RegisterType((*TracerState)(nil), "basictracer_go.wire.TracerState")
}
func (m *TracerState) Marshal() (data []byte, err error) {
size := m.Size()
data = make([]byte, size)
n, err := m.MarshalTo(data)
if err != nil {
return nil, err
}
return data[:n], nil
}
func (m *TracerState) MarshalTo(data []byte) (int, error) {
var i int
_ = i
var l int
_ = l
if m.TraceId != 0 {
data[i] = 0x9
i++
i = encodeFixed64Wire(data, i, uint64(m.TraceId))
}
if m.SpanId != 0 {
data[i] = 0x11
i++
i = encodeFixed64Wire(data, i, uint64(m.SpanId))
}
if m.Sampled {
data[i] = 0x18
i++
if m.Sampled {
data[i] = 1
} else {
data[i] = 0
}
i++
}
if len(m.BaggageItems) > 0 {
for k, _ := range m.BaggageItems {
data[i] = 0x22
i++
v := m.BaggageItems[k]
mapSize := 1 + len(k) + sovWire(uint64(len(k))) + 1 + len(v) + sovWire(uint64(len(v)))
i = encodeVarintWire(data, i, uint64(mapSize))
data[i] = 0xa
i++
i = encodeVarintWire(data, i, uint64(len(k)))
i += copy(data[i:], k)
data[i] = 0x12
i++
i = encodeVarintWire(data, i, uint64(len(v)))
i += copy(data[i:], v)
}
}
return i, nil
}
func encodeFixed64Wire(data []byte, offset int, v uint64) int {
data[offset] = uint8(v)
data[offset+1] = uint8(v >> 8)
data[offset+2] = uint8(v >> 16)
data[offset+3] = uint8(v >> 24)
data[offset+4] = uint8(v >> 32)
data[offset+5] = uint8(v >> 40)
data[offset+6] = uint8(v >> 48)
data[offset+7] = uint8(v >> 56)
return offset + 8
}
func encodeFixed32Wire(data []byte, offset int, v uint32) int {
data[offset] = uint8(v)
data[offset+1] = uint8(v >> 8)
data[offset+2] = uint8(v >> 16)
data[offset+3] = uint8(v >> 24)
return offset + 4
}
func encodeVarintWire(data []byte, offset int, v uint64) int {
for v >= 1<<7 {
data[offset] = uint8(v&0x7f | 0x80)
v >>= 7
offset++
}
data[offset] = uint8(v)
return offset + 1
}
func (m *TracerState) Size() (n int) {
var l int
_ = l
if m.TraceId != 0 {
n += 9
}
if m.SpanId != 0 {
n += 9
}
if m.Sampled {
n += 2
}
if len(m.BaggageItems) > 0 {
for k, v := range m.BaggageItems {
_ = k
_ = v
mapEntrySize := 1 + len(k) + sovWire(uint64(len(k))) + 1 + len(v) + sovWire(uint64(len(v)))
n += mapEntrySize + 1 + sovWire(uint64(mapEntrySize))
}
}
return n
}
func sovWire(x uint64) (n int) {
for {
n++
x >>= 7
if x == 0 {
break
}
}
return n
}
func sozWire(x uint64) (n int) {
return sovWire(uint64((x << 1) ^ uint64((int64(x) >> 63))))
}
func (m *TracerState) Unmarshal(data []byte) error {
l := len(data)
iNdEx := 0
for iNdEx < l {
preIndex := iNdEx
var wire uint64
for shift := uint(0); ; shift += 7 {
if shift >= 64 {
return ErrIntOverflowWire
}
if iNdEx >= l {
return io.ErrUnexpectedEOF
}
b := data[iNdEx]
iNdEx++
wire |= (uint64(b) & 0x7F) << shift
if b < 0x80 {
break
}
}
fieldNum := int32(wire >> 3)
wireType := int(wire & 0x7)
if wireType == 4 {
return fmt.Errorf("proto: TracerState: wiretype end group for non-group")
}
if fieldNum <= 0 {
return fmt.Errorf("proto: TracerState: illegal tag %d (wire type %d)", fieldNum, wire)
}
switch fieldNum {
case 1:
if wireType != 1 {
return fmt.Errorf("proto: wrong wireType = %d for field TraceId", wireType)
}
m.TraceId = 0
if (iNdEx + 8) > l {
return io.ErrUnexpectedEOF
}
iNdEx += 8
m.TraceId = uint64(data[iNdEx-8])
m.TraceId |= uint64(data[iNdEx-7]) << 8
m.TraceId |= uint64(data[iNdEx-6]) << 16
m.TraceId |= uint64(data[iNdEx-5]) << 24
m.TraceId |= uint64(data[iNdEx-4]) << 32
m.TraceId |= uint64(data[iNdEx-3]) << 40
m.TraceId |= uint64(data[iNdEx-2]) << 48
m.TraceId |= uint64(data[iNdEx-1]) << 56
case 2:
if wireType != 1 {
return fmt.Errorf("proto: wrong wireType = %d for field SpanId", wireType)
}
m.SpanId = 0
if (iNdEx + 8) > l {
return io.ErrUnexpectedEOF
}
iNdEx += 8
m.SpanId = uint64(data[iNdEx-8])
m.SpanId |= uint64(data[iNdEx-7]) << 8
m.SpanId |= uint64(data[iNdEx-6]) << 16
m.SpanId |= uint64(data[iNdEx-5]) << 24
m.SpanId |= uint64(data[iNdEx-4]) << 32
m.SpanId |= uint64(data[iNdEx-3]) << 40
m.SpanId |= uint64(data[iNdEx-2]) << 48
m.SpanId |= uint64(data[iNdEx-1]) << 56
case 3:
if wireType != 0 {
return fmt.Errorf("proto: wrong wireType = %d for field Sampled", wireType)
}
var v int
for shift := uint(0); ; shift += 7 {
if shift >= 64 {
return ErrIntOverflowWire
}
if iNdEx >= l {
return io.ErrUnexpectedEOF
}
b := data[iNdEx]
iNdEx++
v |= (int(b) & 0x7F) << shift
if b < 0x80 {
break
}
}
m.Sampled = bool(v != 0)
case 4:
if wireType != 2 {
return fmt.Errorf("proto: wrong wireType = %d for field BaggageItems", wireType)
}
var msglen int
for shift := uint(0); ; shift += 7 {
if shift >= 64 {
return ErrIntOverflowWire
}
if iNdEx >= l {
return io.ErrUnexpectedEOF
}
b := data[iNdEx]
iNdEx++
msglen |= (int(b) & 0x7F) << shift
if b < 0x80 {
break
}
}
if msglen < 0 {
return ErrInvalidLengthWire
}
postIndex := iNdEx + msglen
if postIndex > l {
return io.ErrUnexpectedEOF
}
var keykey uint64
for shift := uint(0); ; shift += 7 {
if shift >= 64 {
return ErrIntOverflowWire
}
if iNdEx >= l {
return io.ErrUnexpectedEOF
}
b := data[iNdEx]
iNdEx++
keykey |= (uint64(b) & 0x7F) << shift
if b < 0x80 {
break
}
}
var stringLenmapkey uint64
for shift := uint(0); ; shift += 7 {
if shift >= 64 {
return ErrIntOverflowWire
}
if iNdEx >= l {
return io.ErrUnexpectedEOF
}
b := data[iNdEx]
iNdEx++
stringLenmapkey |= (uint64(b) & 0x7F) << shift
if b < 0x80 {
break
}
}
intStringLenmapkey := int(stringLenmapkey)
if intStringLenmapkey < 0 {
return ErrInvalidLengthWire
}
postStringIndexmapkey := iNdEx + intStringLenmapkey
if postStringIndexmapkey > l {
return io.ErrUnexpectedEOF
}
mapkey := string(data[iNdEx:postStringIndexmapkey])
iNdEx = postStringIndexmapkey
var valuekey uint64
for shift := uint(0); ; shift += 7 {
if shift >= 64 {
return ErrIntOverflowWire
}
if iNdEx >= l {
return io.ErrUnexpectedEOF
}
b := data[iNdEx]
iNdEx++
valuekey |= (uint64(b) & 0x7F) << shift
if b < 0x80 {
break
}
}
var stringLenmapvalue uint64
for shift := uint(0); ; shift += 7 {
if shift >= 64 {
return ErrIntOverflowWire
}
if iNdEx >= l {
return io.ErrUnexpectedEOF
}
b := data[iNdEx]
iNdEx++
stringLenmapvalue |= (uint64(b) & 0x7F) << shift
if b < 0x80 {
break
}
}
intStringLenmapvalue := int(stringLenmapvalue)
if intStringLenmapvalue < 0 {
return ErrInvalidLengthWire
}
postStringIndexmapvalue := iNdEx + intStringLenmapvalue
if postStringIndexmapvalue > l {
return io.ErrUnexpectedEOF
}
mapvalue := string(data[iNdEx:postStringIndexmapvalue])
iNdEx = postStringIndexmapvalue
if m.BaggageItems == nil {
m.BaggageItems = make(map[string]string)
}
m.BaggageItems[mapkey] = mapvalue
iNdEx = postIndex
default:
iNdEx = preIndex
skippy, err := skipWire(data[iNdEx:])
if err != nil {
return err
}
if skippy < 0 {
return ErrInvalidLengthWire
}
if (iNdEx + skippy) > l {
return io.ErrUnexpectedEOF
}
iNdEx += skippy
}
}
if iNdEx > l {
return io.ErrUnexpectedEOF
}
return nil
}
func skipWire(data []byte) (n int, err error) {
l := len(data)
iNdEx := 0
for iNdEx < l {
var wire uint64
for shift := uint(0); ; shift += 7 {
if shift >= 64 {
return 0, ErrIntOverflowWire
}
if iNdEx >= l {
return 0, io.ErrUnexpectedEOF
}
b := data[iNdEx]
iNdEx++
wire |= (uint64(b) & 0x7F) << shift
if b < 0x80 {
break
}
}
wireType := int(wire & 0x7)
switch wireType {
case 0:
for shift := uint(0); ; shift += 7 {
if shift >= 64 {
return 0, ErrIntOverflowWire
}
if iNdEx >= l {
return 0, io.ErrUnexpectedEOF
}
iNdEx++
if data[iNdEx-1] < 0x80 {
break
}
}
return iNdEx, nil
case 1:
iNdEx += 8
return iNdEx, nil
case 2:
var length int
for shift := uint(0); ; shift += 7 {
if shift >= 64 {
return 0, ErrIntOverflowWire
}
if iNdEx >= l {
return 0, io.ErrUnexpectedEOF
}
b := data[iNdEx]
iNdEx++
length |= (int(b) & 0x7F) << shift
if b < 0x80 {
break
}
}
iNdEx += length
if length < 0 {
return 0, ErrInvalidLengthWire
}
return iNdEx, nil
case 3:
for {
var innerWire uint64
var start int = iNdEx
for shift := uint(0); ; shift += 7 {
if shift >= 64 {
return 0, ErrIntOverflowWire
}
if iNdEx >= l {
return 0, io.ErrUnexpectedEOF
}
b := data[iNdEx]
iNdEx++
innerWire |= (uint64(b) & 0x7F) << shift
if b < 0x80 {
break
}
}
innerWireType := int(innerWire & 0x7)
if innerWireType == 4 {
break
}
next, err := skipWire(data[start:])
if err != nil {
return 0, err
}
iNdEx = start + next
}
return iNdEx, nil
case 4:
return iNdEx, nil
case 5:
iNdEx += 4
return iNdEx, nil
default:
return 0, fmt.Errorf("proto: illegal wireType %d", wireType)
}
}
panic("unreachable")
}
var (
ErrInvalidLengthWire = fmt.Errorf("proto: negative length found during unmarshaling")
ErrIntOverflowWire = fmt.Errorf("proto: integer overflow")
)
var fileDescriptorWire = []byte{
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0xe6, 0x16, 0xe4, 0xa4, 0xa6, 0x48, 0x30, 0x03, 0x25, 0x38, 0x82, 0x60, 0x5c, 0xa1, 0x70, 0x2e,
0xde, 0xa4, 0xc4, 0xf4, 0xf4, 0xc4, 0x74, 0xa0, 0x79, 0x25, 0xa9, 0xb9, 0xc5, 0x12, 0x2c, 0x0a,
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0x4f, 0x90, 0x26, 0xd7, 0xbc, 0x92, 0xa2, 0xca, 0x20, 0x9e, 0x24, 0x24, 0x21, 0x29, 0x7b, 0x2e,
0x41, 0x0c, 0x25, 0x42, 0x02, 0x5c, 0xcc, 0xd9, 0xa9, 0x95, 0x60, 0x67, 0x73, 0x06, 0x81, 0x98,
0x42, 0x22, 0x5c, 0xac, 0x65, 0x89, 0x39, 0xa5, 0xa9, 0x60, 0x07, 0x73, 0x06, 0x41, 0x38, 0x56,
0x4c, 0x16, 0x8c, 0x4e, 0x62, 0x27, 0x1e, 0xc9, 0x31, 0x5e, 0x00, 0xe2, 0x07, 0x40, 0x3c, 0xe1,
0xb1, 0x1c, 0x43, 0x14, 0x0b, 0xc8, 0x11, 0x49, 0x6c, 0xe0, 0xb0, 0x32, 0x06, 0x04, 0x00, 0x00,
0xff, 0xff, 0x0a, 0x20, 0x89, 0x38, 0x39, 0x01, 0x00, 0x00,
}