org.qedeq.kernel.bo.service.internal
Class ModuleArbiterImpl

java.lang.Object
  org.qedeq.kernel.bo.service.internal.ModuleArbiterImpl

All Implemented Interfaces:

ModuleArbiter

public class ModuleArbiterImpl
extends java.lang.Object
implements ModuleArbiter

Get locks for modules. TODO 20130508 m31: Currently we make no difference between read and write locks. We also lock a module during the whole plugin processing for that module. This could be limited to status changes only.

Author:

Michael Meyling

Constructor Summary

ModuleArbiterImpl()
Constructor.

Method Summary

QedeqBoSet	getBlockedModules(ServiceJob process) Get all blocked modules from given process.
boolean	lockRequiredModule(InternalModuleServiceCall call) Lock QEDEQ module for exclusive read and write access.
boolean	unlockRequiredModule(InternalModuleServiceCall call) Unlock module again.
boolean	unlockRequiredModule(ServiceJob process, QedeqBo qedeq)

Methods inherited from class java.lang.Object

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

Constructor Detail

ModuleArbiterImpl

public ModuleArbiterImpl()

Constructor.

Method Detail

lockRequiredModule

public boolean lockRequiredModule(InternalModuleServiceCall call)
                           throws InterruptException

Description copied from interface: ModuleArbiter

Lock QEDEQ module for exclusive read and write access.

Specified by:

lockRequiredModule in interface ModuleArbiter

Parameters:

call - This service call acquires the lock.

Returns:

The call locked this module newly. Before this call the module was not locked.

Throws:

InterruptException - Lock acquirement interrupted.

unlockRequiredModule

public boolean unlockRequiredModule(InternalModuleServiceCall call)

Description copied from interface: ModuleArbiter

Unlock module again.

Specified by:

unlockRequiredModule in interface ModuleArbiter

Parameters:

call - This call must have acquired the lock.

Returns:

Was this module even locked?

unlockRequiredModule

public boolean unlockRequiredModule(ServiceJob process,
                                    QedeqBo qedeq)

getBlockedModules

public QedeqBoSet getBlockedModules(ServiceJob process)

Description copied from interface: ModuleArbiter

Get all blocked modules from given process.

Specified by:

getBlockedModules in interface ModuleArbiter

Parameters:

process - Get all modules blocked by this job.

Returns:

Set of blocked modules.