groovyx.gpars.scheduler

Class ResizeablePool

java.lang.Object

groovyx.gpars.scheduler.DefaultPool

groovyx.gpars.scheduler.ResizeablePool

All Implemented Interfaces:

Pool

public final class ResizeablePool
extends DefaultPool

Represents the actors' thread pool, which performs tasks on behalf of the actors. 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.

Author:

Vaclav Pech Date: Feb 27, 2009

Field Summary

Fields

Modifier and Type	Field and Description
private static long	KEEP_ALIVE_TIME

Fields inherited from interface groovyx.gpars.scheduler.Pool

POOL_SIZE_MUST_BE_A_POSITIVE_NUMBER, UNCAUGHT_EXCEPTION_OCCURRED_IN_GPARS_POOL

Constructor Summary

Constructors

Constructor and Description
ResizeablePool(boolean daemon) Creates the pool with default number of threads.
ResizeablePool(boolean daemon, int poolSize) Creates the pool with specified number of threads.

Method Summary

Methods

Modifier and Type	Method and Description
private static java.util.concurrent.ThreadPoolExecutor	createResizeablePool(boolean daemon, int poolSize) Creates a fixed-thread pool of given size.

Methods inherited from class groovyx.gpars.scheduler.DefaultPool

createThreadName, execute, getExecutorService, getPoolSize, resetDefaultSize, resize, shutdown

Methods inherited from class java.lang.Object

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

Field Detail

KEEP_ALIVE_TIME

private static final long KEEP_ALIVE_TIME

See Also:

Constant Field Values

Constructor Detail

ResizeablePool

public ResizeablePool(boolean daemon)

Creates the pool with default number of threads.

Parameters:

daemon - Sets the daemon flag of threads in the pool.

ResizeablePool

public ResizeablePool(boolean daemon,
              int poolSize)

Creates the pool with specified number of threads.

Parameters:

daemon - Sets the daemon flag of threads in the pool.

poolSize - The required size of the pool

Method Detail

createResizeablePool

private static java.util.concurrent.ThreadPoolExecutor createResizeablePool(boolean daemon,
                                                           int poolSize)

Creates a fixed-thread pool of given size. Each thread will have the uncaught exception handler set to print the unhandled exception to standard error output.

Parameters:

daemon - Sets the daemon flag of threads in the pool.

poolSize - The required pool size @return The created thread pool

Returns:

The newly created thread pool