Package org.opends.server.extensions

Class TraditionalWorkQueue

java.lang.Object

org.opends.server.api.WorkQueue<TraditionalWorkQueueCfg>

org.opends.server.extensions.TraditionalWorkQueue

All Implemented Interfaces:

ConfigurationChangeListener<TraditionalWorkQueueCfg>

public final class TraditionalWorkQueue
extends WorkQueue<TraditionalWorkQueueCfg>
implements ConfigurationChangeListener<TraditionalWorkQueueCfg>

This class defines a data structure for storing and interacting with the Directory Server work queue.

Constructor Summary

Constructors

Constructor	Description
TraditionalWorkQueue()	Creates a new instance of this work queue.

Method Summary

Modifier and Type	Method	Description
ConfigChangeResult	applyConfigurationChange(TraditionalWorkQueueCfg configuration)	Applies the configuration changes to this change listener.
void	finalizeWorkQueue(LocalizableMessage reason)	Performs any necessary finalization for this work queue, including ensuring that all active operations are interrupted or will be allowed to complete, and that all pending operations will be cancelled.
int	getNumWorkerThreads()	Return the number of worker threads used by this WorkQueue.
void	initializeWorkQueue(TraditionalWorkQueueCfg configuration, ServerContext serverContext)	Initializes this work queue based on the information in the provided configuration entry.
boolean	isConfigurationChangeAcceptable(TraditionalWorkQueueCfg configuration, List<LocalizableMessage> unacceptableReasons)	Indicates whether the proposed change to the configuration is acceptable to this change listener.
boolean	isIdle()	Indicates whether the work queue is currently processing any requests.
void	submitOperation(Operation operation)	Submits an operation to be processed by one of the worker threads associated with this work queue.
boolean	trySubmitOperation(Operation operation)	Tries to submit an operation to be processed in the server, without blocking.

Methods inherited from class org.opends.server.api.WorkQueue

waitUntilIdle

Methods inherited from class java.lang.Object

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

Constructor Detail

TraditionalWorkQueue

public TraditionalWorkQueue()

Creates a new instance of this work queue.

Method Detail

initializeWorkQueue

public void initializeWorkQueue(TraditionalWorkQueueCfg configuration,
                                ServerContext serverContext)

Description copied from class: WorkQueue

Initializes this work queue based on the information in the provided configuration entry.

Specified by:

initializeWorkQueue in class WorkQueue<TraditionalWorkQueueCfg>

Parameters:

configuration - The configuration to use to initialize the work queue.

serverContext - The server context.

finalizeWorkQueue

public void finalizeWorkQueue(LocalizableMessage reason)

Description copied from class: WorkQueue

Performs any necessary finalization for this work queue, including ensuring that all active operations are interrupted or will be allowed to complete, and that all pending operations will be cancelled.

Specified by:

finalizeWorkQueue in class WorkQueue<TraditionalWorkQueueCfg>

Parameters:

reason - The human-readable reason that the work queue is being shut down.

submitOperation

public void submitOperation(Operation operation)
                     throws LdapException

Submits an operation to be processed by one of the worker threads associated with this work queue.

Specified by:

submitOperation in class WorkQueue<TraditionalWorkQueueCfg>

Parameters:

operation - The operation to be processed.

Throws:

LdapException - If the provided operation is not accepted for some reason (e.g., if the server is shutting down or the pending operation queue is already at its maximum capacity).

trySubmitOperation

public boolean trySubmitOperation(Operation operation)
                           throws LdapException

Description copied from class: WorkQueue

Tries to submit an operation to be processed in the server, without blocking.

Specified by:

trySubmitOperation in class WorkQueue<TraditionalWorkQueueCfg>

Parameters:

operation - The operation to be processed.

Returns:

true if the operation could be submitted to the queue, false if the queue was full

Throws:

LdapException - If the provided operation is not accepted for some reason (e.g., if the server is shutting down).

isConfigurationChangeAcceptable

public boolean isConfigurationChangeAcceptable(TraditionalWorkQueueCfg configuration,
                                               List<LocalizableMessage> unacceptableReasons)

Description copied from interface: ConfigurationChangeListener

Indicates whether the proposed change to the configuration is acceptable to this change listener.

Specified by:

isConfigurationChangeAcceptable in interface ConfigurationChangeListener<TraditionalWorkQueueCfg>

Parameters:

configuration - The new configuration containing the changes.

unacceptableReasons - A list that can be used to hold messages about why the provided configuration is not acceptable.

Returns:

Returns true if the proposed change is acceptable, or false if it is not.

applyConfigurationChange

public ConfigChangeResult applyConfigurationChange(TraditionalWorkQueueCfg configuration)

Description copied from interface: ConfigurationChangeListener

Applies the configuration changes to this change listener.

Specified by:

applyConfigurationChange in interface ConfigurationChangeListener<TraditionalWorkQueueCfg>

Parameters:

configuration - The new configuration containing the changes.

Returns:

Returns information about the result of changing the configuration.

isIdle

public boolean isIdle()

Description copied from class: WorkQueue

Indicates whether the work queue is currently processing any requests. Note that this is a point-in-time determination, and if any component of the server wishes to depend on a quiescent state then it should use some external mechanism to ensure that no other requests are submitted to the queue.

Specified by:

isIdle in class WorkQueue<TraditionalWorkQueueCfg>

Returns:

true if the work queue is currently idle, or false if it is being used to process one or more operations.

getNumWorkerThreads

public int getNumWorkerThreads()

Return the number of worker threads used by this WorkQueue.

Specified by:

getNumWorkerThreads in class WorkQueue<TraditionalWorkQueueCfg>

Returns:

the number of worker threads used by this WorkQueue