org.apache.hadoop.hbase.procedure2

类 SimpleProcedureScheduler

java.lang.Object

org.apache.hadoop.hbase.procedure2.AbstractProcedureScheduler

org.apache.hadoop.hbase.procedure2.SimpleProcedureScheduler

所有已实现的接口:

ProcedureScheduler

@InterfaceAudience.Private
 @InterfaceStability.Evolving
public class SimpleProcedureScheduler
extends AbstractProcedureScheduler

Simple scheduler for procedures

构造器概要

构造器

构造器和说明
SimpleProcedureScheduler()

方法概要

限定符和类型	方法和说明
void	clear() Clear current state of scheduler such that it is equivalent to newly created scheduler.
void	completionCleanup(Procedure proc) The procedure in execution completed.
protected Procedure	dequeue(boolean onlyUrgent)
protected void	enqueue(Procedure procedure, boolean addFront) Add the procedure to the queue.
LockedResource	getLockResource(LockedResourceType resourceType, String resourceName)
List<LockedResource>	getLocks() List lock queues.
boolean	queueHasRunnables() Returns true if there are procedures available to process.
int	queueSize() Returns the number of elements in this queue.
void	yield(Procedure proc) The procedure can't run at the moment.

从类继承的方法 org.apache.hadoop.hbase.procedure2.AbstractProcedureScheduler

addBack, addBack, addFront, addFront, addFront, dequeue, getNullPollCalls, getPollCalls, hasRunnables, poll, poll, poll, poll, poll, poll, push, schedLock, schedUnlock, signalAll, size, start, stop, waitProcedure, wakePollIfNeeded, wakeProcedure, wakeWaitingProcedures

从类继承的方法 java.lang.Object

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

构造器详细资料

SimpleProcedureScheduler

public SimpleProcedureScheduler()

方法详细资料

enqueue

protected void enqueue(Procedure procedure,
                       boolean addFront)

从类复制的说明: AbstractProcedureScheduler

Add the procedure to the queue. NOTE: this method is called with the sched lock held.

指定者:

enqueue 在类中 AbstractProcedureScheduler

参数:

procedure - the Procedure to add

addFront - true if the item should be added to the front of the queue

dequeue

protected Procedure dequeue(boolean onlyUrgent)

指定者:

dequeue 在类中 AbstractProcedureScheduler

clear

public void clear()

从接口复制的说明: ProcedureScheduler

Clear current state of scheduler such that it is equivalent to newly created scheduler. Used for testing failure and recovery. To emulate server crash/restart, ProcedureExecutor resets its own state and calls clear() on scheduler.

yield

public void yield(Procedure proc)

从接口复制的说明: ProcedureScheduler

The procedure can't run at the moment. add it back to the queue, giving priority to someone else.

参数:

proc - the Procedure to add back to the list

queueHasRunnables

public boolean queueHasRunnables()

从类复制的说明: AbstractProcedureScheduler

Returns true if there are procedures available to process. NOTE: this method is called with the sched lock held.

指定者:

queueHasRunnables 在类中 AbstractProcedureScheduler

返回:

true if there are procedures available to process, otherwise false.

queueSize

public int queueSize()

从类复制的说明: AbstractProcedureScheduler

Returns the number of elements in this queue. NOTE: this method is called with the sched lock held.

指定者:

queueSize 在类中 AbstractProcedureScheduler

返回:

the number of elements in this queue.

completionCleanup

public void completionCleanup(Procedure proc)

从接口复制的说明: ProcedureScheduler

The procedure in execution completed. This can be implemented to perform cleanups.

参数:

proc - the Procedure that completed the execution.

getLocks

public List<LockedResource> getLocks()

从接口复制的说明: ProcedureScheduler

List lock queues.

返回:

the locks

getLockResource

public LockedResource getLockResource(LockedResourceType resourceType,
                                      String resourceName)

返回:

LockedResource for resource of specified type & name. null if resource is not locked.