org.camunda.bpm.engine.impl.cmd
Class AcquireJobsCmd

java.lang.Object
  org.camunda.bpm.engine.impl.cmd.AcquireJobsCmd

All Implemented Interfaces:

OptimisticLockingListener, Command<AcquiredJobs>

public class AcquireJobsCmd
extends Object
implements Command<AcquiredJobs>, OptimisticLockingListener

Author:

Nick Burch, Daniel Meyer

Field Summary

protected AcquiredJobs	acquiredJobs
protected int	numJobsToAcquire

Constructor Summary

AcquireJobsCmd(JobExecutor jobExecutor)

AcquireJobsCmd(JobExecutor jobExecutor, int numJobsToAcquire)

Method Summary

AcquiredJobs	execute(CommandContext commandContext)
void	failedOperation(DbOperation operation) Signifies that an operation failed due to optimistic locking.
Class<? extends DbEntity>	getEntityType() The type of the entity for which this listener should be notified.
protected List<String>	lockExclusiveJobs(CommandContext commandContext, JobEntity job)
protected void	lockJob(JobEntity job)

Methods inherited from class java.lang.Object

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

Field Detail

acquiredJobs

protected AcquiredJobs acquiredJobs

numJobsToAcquire

protected int numJobsToAcquire

Constructor Detail

AcquireJobsCmd

public AcquireJobsCmd(JobExecutor jobExecutor)

AcquireJobsCmd

public AcquireJobsCmd(JobExecutor jobExecutor,
                      int numJobsToAcquire)

Method Detail

execute

public AcquiredJobs execute(CommandContext commandContext)

Specified by:

execute in interface Command<AcquiredJobs>

lockExclusiveJobs

protected List<String> lockExclusiveJobs(CommandContext commandContext,
                                         JobEntity job)

lockJob

protected void lockJob(JobEntity job)

getEntityType

public Class<? extends DbEntity> getEntityType()

Description copied from interface: OptimisticLockingListener

The type of the entity for which this listener should be notified. If the implementation returns 'null', the listener is notified for all entity types.

Specified by:

getEntityType in interface OptimisticLockingListener

Returns:

the entity type for which the listener should be notified.

failedOperation

public void failedOperation(DbOperation operation)

Description copied from interface: OptimisticLockingListener

Signifies that an operation failed due to optimistic locking.

Specified by:

failedOperation in interface OptimisticLockingListener

Parameters:

operation - the failed operation.