Package org.jppf.execute

Class AbstractThreadManager

java.lang.Object

org.jppf.execute.AbstractThreadManager

All Implemented Interfaces:

ThreadManager

Direct Known Subclasses:

ThreadManagerForkJoin, ThreadManagerThreadPool

public abstract class AbstractThreadManager
extends Object
implements ThreadManager

This class manages the thread for the node's execution manager.

Author:

Laurent Cohen, Martin JANDA

Nested Class Summary

Nested classes/interfaces inherited from interface org.jppf.execute.ThreadManager

ThreadManager.UsedClassLoader

Field Summary

Fields

Modifier and Type	Field	Description
static final String	THREAD_NAME_PREFIX	Prefix used for the names of the threads created by the executor.

Constructor Summary

Constructors

Modifier	Constructor	Description
protected	AbstractThreadManager()	Initialize this execution manager with the specified node.

Method Summary

Modifier and Type	Method	Description
ExecutionInfo	computeExecutionInfo()	Computes the total CPU time used by the execution threads.
ExecutionInfo	computeExecutionInfo(long threadID)	Computes the CPU time used by thread identified by threadID.
long	getCpuTime(long threadId)	Get the current cpu time for the thread identified by the specified id.
protected abstract long[]	getThreadIds()	Get the ids of all managed threads.
boolean	isCpuTimeEnabled()	Determines whether the thread cpu time measurement is supported and enabled.

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.jppf.execute.ThreadManager

getExecutorService, getPoolSize, getPriority, setPoolSize, setPriority, useClassLoader

Field Details

THREAD_NAME_PREFIX

public static final String THREAD_NAME_PREFIX

Prefix used for the names of the threads created by the executor.

See Also:

• Constant Field Values

Constructor Details

AbstractThreadManager

protected AbstractThreadManager()

Initialize this execution manager with the specified node.

Method Details

computeExecutionInfo

public ExecutionInfo computeExecutionInfo()

Description copied from interface: ThreadManager

Computes the total CPU time used by the execution threads.

Specified by:

computeExecutionInfo in interface ThreadManager

Returns:

a NodeExecutionInfo instance.

computeExecutionInfo

public ExecutionInfo computeExecutionInfo(long threadID)

Description copied from interface: ThreadManager

Computes the CPU time used by thread identified by threadID.

Specified by:

computeExecutionInfo in interface ThreadManager

Parameters:

threadID - the thread ID.

Returns:

a NodeExecutionInfo instance.

getThreadIds

protected abstract long[] getThreadIds()

Get the ids of all managed threads.

Returns:

the ids as an array of long values, may be an empty but never null array.

getCpuTime

public long getCpuTime(long threadId)

Description copied from interface: ThreadManager

Get the current cpu time for the thread identified by the specified id.

Specified by:

getCpuTime in interface ThreadManager

Parameters:

threadId - the id of the thread to the cpu time from.

Returns:

the cpu time as a long value.

isCpuTimeEnabled

public boolean isCpuTimeEnabled()

Description copied from interface: ThreadManager

Determines whether the thread cpu time measurement is supported and enabled.

Specified by:

isCpuTimeEnabled in interface ThreadManager

Returns:

true is cpu time measurement is enabled, false otherwise.