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groovyx.gpars.scheduler
[Java] Class FJPool

java.lang.Object
  groovyx.gpars.scheduler.FJPool
All Implemented Interfaces:
Pool
public class FJPool
extends java.lang.Object

Represents the actors' thread pool, which performs tasks on behalf of the actors. Uses a ForkJoinPool from JSR-166y The actors' thread pool size defaults to the n + 1, where n is the number of processors/cores available on the machine. The VM parameter -Dgpars.poolsize can be used the configure the default size of the actors' thread pool. The resize() and resetDefaultSize() methods can be used to configure size of the thread pool at runtime.

Authors:
Vaclav Pech Date: Feb 27, 2009

Field Summary
private static long DEFAULT_SHUTDOWN_TIMEOUT

private int configuredPoolSize

protected jsr166y.ForkJoinPool pool

 
Constructor Summary
FJPool()

Creates the pool with default number of threads.
FJPool(int configuredPoolSize)

Creates the pool with specified number of threads.
FJPool(jsr166y.ForkJoinPool pool)

Creates the pool wrapping the provided ForkJoinPool
 
Method Summary
private static jsr166y.ForkJoinPool createPool(int poolSize)

Creates a fork/join pool of given size.

void execute(java.lang.Runnable task)

schedules a new task for processing with the pool
protected int getConfiguredPoolSize()

jsr166y.ForkJoinPool getForkJoinPool()

Retrieves the internal executor service.
int getPoolSize()

Retrieves the current thread pool size
void resetDefaultSize()

Sets the pool size to the default
void resize(int poolSize)

Resizes the thread pool to the specified value
void shutdown()

Gently stops the pool
 
Methods inherited from class java.lang.Object
java.lang.Object#wait(long), java.lang.Object#wait(), java.lang.Object#wait(long, int), java.lang.Object#equals(java.lang.Object), java.lang.Object#toString(), java.lang.Object#hashCode(), java.lang.Object#getClass(), java.lang.Object#notify(), java.lang.Object#notifyAll()
 

Field Detail

DEFAULT_SHUTDOWN_TIMEOUT

private static final long DEFAULT_SHUTDOWN_TIMEOUT

configuredPoolSize

private final int configuredPoolSize

pool

protected final jsr166y.ForkJoinPool pool

 
Constructor Detail

FJPool

public FJPool()
Creates the pool with default number of threads.

FJPool

public FJPool(int configuredPoolSize)
Creates the pool with specified number of threads.
Parameters:
configuredPoolSize - The required size of the pool

FJPool

public FJPool(jsr166y.ForkJoinPool pool)
Creates the pool wrapping the provided ForkJoinPool
Parameters:
pool - The ForkJoinPool instance to wrap

 
Method Detail

createPool

private static jsr166y.ForkJoinPool createPool(int poolSize)
Creates a fork/join pool of given size. Each thread will have the uncaught exception handler set to print the unhandled exception to standard error output.
Parameters:
poolSize - The required pool size
Returns:
The created thread pool
The newly created thread pool

execute

@Override
public void execute(java.lang.Runnable task)
schedules a new task for processing with the pool
Parameters:
task - The task to schedule

getConfiguredPoolSize

protected final int getConfiguredPoolSize()

getForkJoinPool

public final jsr166y.ForkJoinPool getForkJoinPool()
Retrieves the internal executor service.
Returns:
The underlying thread pool

getPoolSize

@Override
public int getPoolSize()
Retrieves the current thread pool size
Returns:
The pool size

resetDefaultSize

@Override
public final void resetDefaultSize()
Sets the pool size to the default

resize

@Override
public final void resize(int poolSize)
Resizes the thread pool to the specified value
Parameters:
poolSize - The new pool size

shutdown

@Override
public final void shutdown()
Gently stops the pool

 

Copyright © 2008–2010 Václav Pech. All Rights Reserved.