org.camunda.bpm.engine.impl.jobexecutor
Class JobExecutor

java.lang.Object
  org.camunda.bpm.engine.impl.jobexecutor.JobExecutor

Direct Known Subclasses:

RuntimeContainerJobExecutor, ThreadPoolJobExecutor

public abstract class JobExecutor
extends Object

Interface to the component responsible for performing background work (Jobs).

The JobExecutor is capable of dispatching to multiple process engines, ie. multiple process engines can share a single Thread Pool for performing Background Work.

In clustered situations, you can have multiple Job Executors running against the same queue + pending job list.

Author:

Daniel Meyer

Field Summary

protected AcquireJobsCommandFactory	acquireJobsCmdFactory
protected AcquireJobsRunnable	acquireJobsRunnable
protected int	backoffDecreaseThreshold The number of job acquisition cycles without locking failures until the backoff level is reduced.
protected int	backoffTimeInMillis
protected boolean	isActive
protected boolean	isAutoActivate
protected Thread	jobAcquisitionThread
protected String	lockOwner
protected int	lockTimeInMillis
protected long	maxBackoff
protected int	maxJobsPerAcquisition
protected long	maxWait
protected String	name
protected List<ProcessEngineImpl>	processEngines
protected RejectedJobsHandler	rejectedJobsHandler
protected float	waitIncreaseFactor
protected int	waitTimeInMillis

Constructor Summary

JobExecutor()

Method Summary

Iterator<ProcessEngineImpl>	engineIterator() Must return an iterator of registered process engines that is independent of concurrent modifications to the underlying data structure of engines.
protected void	ensureCleanup()
protected void	ensureInitialization()
void	executeJobs(List<String> jobIds) Deprecated.
abstract void	executeJobs(List<String> jobIds, ProcessEngineImpl processEngine)
Command<AcquiredJobs>	getAcquireJobsCmd(int numJobs)
AcquireJobsCommandFactory	getAcquireJobsCmdFactory()
AcquireJobsRunnable	getAcquireJobsRunnable()
int	getBackoffDecreaseThreshold()
int	getBackoffTimeInMillis()
CommandExecutor	getCommandExecutor() Deprecated.
Runnable	getExecuteJobsRunnable(List<String> jobIds, ProcessEngineImpl processEngine)
String	getLockOwner()
int	getLockTimeInMillis()
long	getMaxBackoff()
int	getMaxJobsPerAcquisition()
long	getMaxWait()
String	getName()
List<ProcessEngineImpl>	getProcessEngines()
RejectedJobsHandler	getRejectedJobsHandler()
float	getWaitIncreaseFactor()
int	getWaitTimeInMillis()
boolean	hasRegisteredEngine(ProcessEngineImpl engine)
boolean	isActive()
boolean	isAutoActivate()
void	jobWasAdded()
void	logAcquiredJobs(ProcessEngineImpl engine, int numJobs)
void	logAcquisitionAttempt(ProcessEngineImpl engine)
void	logAcquisitionFailureJobs(ProcessEngineImpl engine, int numJobs)
void	logRejectedExecution(ProcessEngineImpl engine, int numJobs)
void	registerProcessEngine(ProcessEngineImpl processEngine)
void	setAcquireJobsCmdFactory(AcquireJobsCommandFactory acquireJobsCmdFactory)
void	setAutoActivate(boolean isAutoActivate)
void	setBackoffDecreaseThreshold(int backoffDecreaseThreshold)
void	setBackoffTimeInMillis(int backoffTimeInMillis)
void	setCommandExecutor(CommandExecutor commandExecutorTxRequired) Deprecated.
void	setLockOwner(String lockOwner)
void	setLockTimeInMillis(int lockTimeInMillis)
void	setMaxBackoff(long maxBackoff)
void	setMaxJobsPerAcquisition(int maxJobsPerAcquisition)
void	setMaxWait(long maxWait)
void	setProcessEngines(List<ProcessEngineImpl> processEngines)
void	setRejectedJobsHandler(RejectedJobsHandler rejectedJobsHandler)
void	setWaitIncreaseFactor(float waitIncreaseFactor)
void	setWaitTimeInMillis(int waitTimeInMillis)
void	shutdown()
void	start()
protected abstract void	startExecutingJobs()
protected void	startJobAcquisitionThread()
protected abstract void	stopExecutingJobs()
protected void	stopJobAcquisitionThread()
void	unregisterProcessEngine(ProcessEngineImpl processEngine)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

name

protected String name

processEngines

protected List<ProcessEngineImpl> processEngines

acquireJobsCmdFactory

protected AcquireJobsCommandFactory acquireJobsCmdFactory

acquireJobsRunnable

protected AcquireJobsRunnable acquireJobsRunnable

rejectedJobsHandler

protected RejectedJobsHandler rejectedJobsHandler

jobAcquisitionThread

protected Thread jobAcquisitionThread

isAutoActivate

protected boolean isAutoActivate

isActive

protected boolean isActive

maxJobsPerAcquisition

protected int maxJobsPerAcquisition

waitTimeInMillis

protected int waitTimeInMillis

waitIncreaseFactor

protected float waitIncreaseFactor

maxWait

protected long maxWait

backoffTimeInMillis

protected int backoffTimeInMillis

maxBackoff

protected long maxBackoff

backoffDecreaseThreshold

protected int backoffDecreaseThreshold

The number of job acquisition cycles without locking failures until the backoff level is reduced.

lockOwner

protected String lockOwner

lockTimeInMillis

protected int lockTimeInMillis

Constructor Detail

JobExecutor

public JobExecutor()

Method Detail

start

public void start()

shutdown

public void shutdown()

ensureInitialization

protected void ensureInitialization()

ensureCleanup

protected void ensureCleanup()

jobWasAdded

public void jobWasAdded()

registerProcessEngine

public void registerProcessEngine(ProcessEngineImpl processEngine)

unregisterProcessEngine

public void unregisterProcessEngine(ProcessEngineImpl processEngine)

startExecutingJobs

protected abstract void startExecutingJobs()

stopExecutingJobs

protected abstract void stopExecutingJobs()

executeJobs

public abstract void executeJobs(List<String> jobIds,
                                 ProcessEngineImpl processEngine)

executeJobs

@Deprecated
public void executeJobs(List<String> jobIds)

Deprecated.

Deprecated: use executeJobs(List, ProcessEngineImpl) instead

Parameters:

jobIds -

logAcquisitionAttempt

public void logAcquisitionAttempt(ProcessEngineImpl engine)

logAcquiredJobs

public void logAcquiredJobs(ProcessEngineImpl engine,
                            int numJobs)

logAcquisitionFailureJobs

public void logAcquisitionFailureJobs(ProcessEngineImpl engine,
                                      int numJobs)

logRejectedExecution

public void logRejectedExecution(ProcessEngineImpl engine,
                                 int numJobs)

getProcessEngines

public List<ProcessEngineImpl> getProcessEngines()

engineIterator

public Iterator<ProcessEngineImpl> engineIterator()

Must return an iterator of registered process engines that is independent of concurrent modifications to the underlying data structure of engines.

hasRegisteredEngine

public boolean hasRegisteredEngine(ProcessEngineImpl engine)

getCommandExecutor

@Deprecated
public CommandExecutor getCommandExecutor()

Deprecated.

Deprecated: use getProcessEngines() instead

setCommandExecutor

@Deprecated
public void setCommandExecutor(CommandExecutor commandExecutorTxRequired)

Deprecated.

Deprecated: use registerProcessEngine(ProcessEngineImpl) instead

Parameters:

commandExecutorTxRequired -

getWaitTimeInMillis

public int getWaitTimeInMillis()

setWaitTimeInMillis

public void setWaitTimeInMillis(int waitTimeInMillis)

getBackoffTimeInMillis

public int getBackoffTimeInMillis()

setBackoffTimeInMillis

public void setBackoffTimeInMillis(int backoffTimeInMillis)

getLockTimeInMillis

public int getLockTimeInMillis()

setLockTimeInMillis

public void setLockTimeInMillis(int lockTimeInMillis)

getLockOwner

public String getLockOwner()

setLockOwner

public void setLockOwner(String lockOwner)

isAutoActivate

public boolean isAutoActivate()

setProcessEngines

public void setProcessEngines(List<ProcessEngineImpl> processEngines)

setAutoActivate

public void setAutoActivate(boolean isAutoActivate)

getMaxJobsPerAcquisition

public int getMaxJobsPerAcquisition()

setMaxJobsPerAcquisition

public void setMaxJobsPerAcquisition(int maxJobsPerAcquisition)

getWaitIncreaseFactor

public float getWaitIncreaseFactor()

setWaitIncreaseFactor

public void setWaitIncreaseFactor(float waitIncreaseFactor)

getMaxWait

public long getMaxWait()

setMaxWait

public void setMaxWait(long maxWait)

getMaxBackoff

public long getMaxBackoff()

setMaxBackoff

public void setMaxBackoff(long maxBackoff)

getBackoffDecreaseThreshold

public int getBackoffDecreaseThreshold()

setBackoffDecreaseThreshold

public void setBackoffDecreaseThreshold(int backoffDecreaseThreshold)

getName

public String getName()

getAcquireJobsCmd

public Command<AcquiredJobs> getAcquireJobsCmd(int numJobs)

getAcquireJobsCmdFactory

public AcquireJobsCommandFactory getAcquireJobsCmdFactory()

setAcquireJobsCmdFactory

public void setAcquireJobsCmdFactory(AcquireJobsCommandFactory acquireJobsCmdFactory)

isActive

public boolean isActive()

getRejectedJobsHandler

public RejectedJobsHandler getRejectedJobsHandler()

setRejectedJobsHandler

public void setRejectedJobsHandler(RejectedJobsHandler rejectedJobsHandler)

startJobAcquisitionThread

protected void startJobAcquisitionThread()

stopJobAcquisitionThread

protected void stopJobAcquisitionThread()

getAcquireJobsRunnable

public AcquireJobsRunnable getAcquireJobsRunnable()

getExecuteJobsRunnable

public Runnable getExecuteJobsRunnable(List<String> jobIds,
                                       ProcessEngineImpl processEngine)