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261 lines
8.0 KiB
C
261 lines
8.0 KiB
C
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/* -------------------------------------------------------------------------- */
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/* Copyright 2002-2008, Distributed Systems Architecture Group, Universidad */
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/* Complutense de Madrid (dsa-research.org) */
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/* */
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/* Licensed under the Apache License, Version 2.0 (the "License"); you may */
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/* not use this file except in compliance with the License. You may obtain */
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/* a copy of the License at */
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/* */
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/* http://www.apache.org/licenses/LICENSE-2.0 */
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/* */
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/* Unless required by applicable law or agreed to in writing, software */
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/* distributed under the License is distributed on an "AS IS" BASIS, */
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/* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. */
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/* See the License for the specific language governing permissions and */
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/* limitations under the License. */
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/* -------------------------------------------------------------------------- */
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#ifndef DISPATCH_MANAGER_H_
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#define DISPATCH_MANAGER_H_
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#include "ActionManager.h"
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#include "HostPool.h"
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#include "VirtualMachinePool.h"
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using namespace std;
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extern "C" void * dm_action_loop(void *arg);
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class DispatchManager : public ActionListener
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{
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public:
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DispatchManager(
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VirtualMachinePool * _vmpool,
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HostPool * _hpool):
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hpool(_hpool),
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vmpool(_vmpool)
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{
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am.addListener(this);
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};
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~DispatchManager()
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{}
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;
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enum Actions
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{
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SUSPEND_SUCCESS, /**< Send by LCM when a VM is suspended*/
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SUSPEND_FAILURE, /**< Send by LCM when a VM could not be suspended*/
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STOP_SUCCESS, /**< Send by LCM when a VM is stopped*/
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STOP_FAILURE, /**< Send by LCM when a VM could not be stopped*/
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MIGRATE_FAILURE, /**< Send by LCM when a VM could not be migrated*/
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DONE, /**< Send by LCM when a VM is shut down*/
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FAILED, /**< Send by LCM when one of the execution steps fails*/
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FINALIZE
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};
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/**
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* Triggers specific actions to the Dispatch Manager. This function
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* wraps the ActionManager trigger function.
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* @param action the DM action
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* @param vid VM unique id. This is the argument of the passed to the
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* invoked action.
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*/
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void trigger(
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Actions action,
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int _vid);
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/**
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* This functions creates a new thread for the Dispatch Manager. This
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* thread will wait in an action loop till it receives ACTION_FINALIZE.
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* @return 0 on success.
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*/
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int start();
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/**
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* Gets the thread identification.
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* @return pthread_t for the manager thread (that in the action loop).
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*/
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pthread_t get_thread_id() const
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{
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return dm_thread;
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};
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//--------------------------------------------------------------------------
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// DM Actions, the RM and the Scheduler will invoke this methods
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//--------------------------------------------------------------------------
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/**
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* Allocates a new virtual machine
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* @return 0 on success
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*/
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int allocate (
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int uid,
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const string& stemplate,
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int * oid);
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/**
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* Deploys a VM. A new history record MUST be added before calling this
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* function. Also the VM MUST have its mutex locked. If the function fails
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* the calling funtion is responsible for recovering from the error.
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* @param vm pointer to a VirtualMachine with its mutex locked.
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* @return 0 on success
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*/
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int deploy (
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VirtualMachine * vm);
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/**
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* Migrates a VM. The following actions must be performed before calling
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* this function:
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* - Lock the VM mutex.
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* - Update the History statistics of the current host.
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* - Add a new History record with the new host.
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* If the function fails the calling funtion is responsible for recovering
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* from the error.
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* @param vm pointer to a VirtualMachine with its mutex locked.
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* @return 0 on success
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*/
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int migrate(
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VirtualMachine * vm);
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/**
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* Migrates a VM. The following actions must be performed before calling
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* this function:
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* - Lock the VM mutex.
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* - Update the History statistics of the current host.
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* - Add a new History record with the new host.
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* If the function fails the calling funtion is responsible for recovering
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* from the error.
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* @param vm pointer to a VirtualMachine with its mutex locked.
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* @return 0 on success
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*/
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int live_migrate(
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VirtualMachine * vm);
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/**
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* Shuts down a VM.
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* @param vid VirtualMachine identification
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* @return 0 on success, -1 if the VM does not exits or -2 if the VM is
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* in a wrong a state
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*/
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int shutdown (
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int vid);
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/**
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* Holds a VM.
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* @param vid VirtualMachine identification
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* @return 0 on success, -1 if the VM does not exits or -2 if the VM is
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* in a wrong a state
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*/
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int hold(
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int vid);
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/**
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* Releases a VM.
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* @param vid VirtualMachine identification
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* @return 0 on success, -1 if the VM does not exits or -2 if the VM is
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* in a wrong a state
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*/
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int release(
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int vid);
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/**
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* Stops a VM.
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* @param vid VirtualMachine identification
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* @return 0 on success, -1 if the VM does not exits or -2 if the VM is
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* in a wrong a state
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*/
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int stop(
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int vid);
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/**
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* Suspends a VM.
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* @param vid VirtualMachine identification
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* @return 0 on success, -1 if the VM does not exits or -2 if the VM is
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* in a wrong a state
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*/
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int suspend(
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int vid);
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/**
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* Resumes a VM.
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* @param vid VirtualMachine identification
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* @return 0 on success, -1 if the VM does not exits or -2 if the VM is
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* in a wrong a state
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*/
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int resume(
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int vid);
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/**
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* Ends a VM life cycle inside ONE.
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* @param vid VirtualMachine identification
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* @return 0 on success, -1 if the VM does not exits or -2 if the VM is
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* in a wrong a state
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*/
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int finalize(
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int vid);
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private:
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/**
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* Thread id for the Dispatch Manager
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*/
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pthread_t dm_thread;
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/**
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* Pointer to the Host Pool, to access hosts
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*/
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HostPool * hpool;
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/**
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* Pointer to the Host Pool, to access hosts
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*/
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VirtualMachinePool * vmpool;
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/**
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* Action engine for the Manager
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*/
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ActionManager am;
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/**
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* Function to execute the Manager action loop method within a new pthread
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* (requires C linkage)
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*/
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friend void * dm_action_loop(void *arg);
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/**
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* The action function executed when an action is triggered.
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* @param action the name of the action
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* @param arg arguments for the action function
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*/
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void do_action(
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const string & action,
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void * arg);
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//--------------------------------------------------------------------------
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// DM Actions associated with a VM state transition
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//--------------------------------------------------------------------------
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void suspend_success_action(int vid);
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void suspend_failure_action(int vid);
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void stop_success_action(int vid);
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void stop_failure_action(int vid);
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void migrate_failure_action(int vid);
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void done_action(int vid);
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void failed_action(int vid);
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void host_add_vm(VirtualMachine *vm);
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void host_del_vm(VirtualMachine *vm);
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};
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#endif /*DISPATCH_MANAGER_H*/
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