mirror of
https://github.com/OpenNebula/one.git
synced 2024-12-24 21:34:01 +03:00
174 lines
5.3 KiB
C++
174 lines
5.3 KiB
C++
/* -------------------------------------------------------------------------- */
|
|
/* Copyright 2002-2016, OpenNebula Project, OpenNebula Systems */
|
|
/* */
|
|
/* 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. */
|
|
/* -------------------------------------------------------------------------- */
|
|
|
|
#ifndef SYSTEM_DB_H_
|
|
#define SYSTEM_DB_H_
|
|
|
|
#include "SqlDB.h"
|
|
#include "Callbackable.h"
|
|
|
|
class Nebula;
|
|
|
|
/**
|
|
* This class represents the OpenNebula core system data tables:
|
|
* - pool_control
|
|
* - db_versioning
|
|
* - system attributes
|
|
*/
|
|
class SystemDB: public Callbackable
|
|
{
|
|
public:
|
|
/**
|
|
* Reads a System attribute from the DB
|
|
* @param attr_name name of the attribute
|
|
* @param attr_xml the attribute in a XML document
|
|
* @return 0 on success
|
|
*/
|
|
int select_sys_attribute(const string& attr_name, string& attr_zml);
|
|
|
|
/**
|
|
* Writes a system attribute in the database.
|
|
* @param db pointer to the db
|
|
* @return 0 on success
|
|
*/
|
|
int insert_sys_attribute(
|
|
const string& attr_name,
|
|
const string& xml_attr,
|
|
string& error_str)
|
|
{
|
|
return insert_replace(attr_name, xml_attr, false, error_str);
|
|
};
|
|
|
|
/**
|
|
* Updates the system attribute in the database.
|
|
* @param db pointer to the db
|
|
* @return 0 on success
|
|
*/
|
|
int update_sys_attribute(
|
|
const string& attr_name,
|
|
const string& xml_attr,
|
|
string& error_str)
|
|
{
|
|
return insert_replace(attr_name, xml_attr, true, error_str);
|
|
};
|
|
|
|
private:
|
|
friend class Nebula; //Only for Nebula class
|
|
|
|
SystemDB(SqlDB *_db):db(_db){};
|
|
|
|
~SystemDB(){};
|
|
|
|
// Pool control table
|
|
static const char * pc_names;
|
|
|
|
static const char * pc_bootstrap;
|
|
|
|
static const char * pc_table;
|
|
|
|
// DB versioning table
|
|
static const char * shared_ver_names;
|
|
|
|
static const char * shared_ver_bootstrap;
|
|
|
|
static const char * shared_ver_table;
|
|
|
|
// DB slave versioning table
|
|
static const char * local_ver_names;
|
|
|
|
static const char * local_ver_bootstrap;
|
|
|
|
static const char * local_ver_table;
|
|
|
|
// System attributes table
|
|
static const char * sys_names;
|
|
|
|
static const char * sys_bootstrap;
|
|
|
|
static const char * sys_table;
|
|
|
|
// Pointer to the db database
|
|
SqlDB *db;
|
|
|
|
/**
|
|
* Execute an INSERT or REPLACE Sql query for a system attribute.
|
|
* @param db The SQL DB
|
|
* @param replace Execute an INSERT or a REPLACE
|
|
* @param error_str Returns the error reason, if any
|
|
* @return 0 one success
|
|
*/
|
|
int insert_replace(const string& attr_name,
|
|
const string& xml_attr,
|
|
bool replace,
|
|
string& error_str);
|
|
/**
|
|
* Bootstraps the database control tables for shared tables
|
|
*
|
|
* @return 0 on success
|
|
*/
|
|
int shared_bootstrap();
|
|
|
|
/**
|
|
* Bootstraps the database control tables for a local DB tables
|
|
*
|
|
* @return 0 on success
|
|
*/
|
|
int local_bootstrap();
|
|
|
|
/**
|
|
* Callback function for the check_db_version method. Stores the read
|
|
* version in loaded_db_version
|
|
* @param _loaded_db_version returned columns
|
|
* @param num the number of columns read from the DB
|
|
* @param names the column names
|
|
* @param vaues the column values
|
|
* @return 0 on success
|
|
*/
|
|
int select_cb(void *_loaded_db_version,
|
|
int num,
|
|
char **values,
|
|
char **names);
|
|
/**
|
|
* Callback function for selecting system attributes
|
|
*/
|
|
int select_attr_cb(void *_attr_xml,
|
|
int num,
|
|
char **values,
|
|
char **names);
|
|
/**
|
|
* Reads the current DB version.
|
|
* @param is_federation_slave
|
|
* @param local_bs boostrap local DB tables
|
|
* @param shared_bs boostrap shared DB tables
|
|
*
|
|
* @return 0 on success,
|
|
* -1 if there is a version mismatch, or replica config error.
|
|
*/
|
|
int check_db_version(bool is_slave, bool& local_bs, bool& shared_bs);
|
|
|
|
/**
|
|
* check_db_version to check versioning
|
|
* @param table name of the DB table
|
|
* @param version target DB version
|
|
* @return 0 success, -1 upgrade needed, -2 bootstrap needed
|
|
*/
|
|
int check_db_version(const string& table,
|
|
const string& version,
|
|
string& error);
|
|
};
|
|
|
|
#endif //SYSTEM_DB_H
|