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/*************************************************************************
*
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* Copyright 2000, 2010 Oracle and/or its affiliates.
*
* OpenOffice.org - a multi-platform office productivity suite
*
* This file is part of OpenOffice.org.
*
* OpenOffice.org is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License version 3
* only, as published by the Free Software Foundation.
*
* OpenOffice.org is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License version 3 for more details
* (a copy is included in the LICENSE file that accompanied this code).
*
* You should have received a copy of the GNU Lesser General Public License
* version 3 along with OpenOffice.org. If not, see
* <http://www.openoffice.org/license.html>
* for a copy of the LGPLv3 License.
*
************************************************************************/
package com.sun.star.lib.uno.environments.remote;
/**
* Manages the UNO thread pool factory.
*
* <P>The thread pool factory is a process-wide resource. It is important that
* all UNO environments within a process share the same thread pool mechanisms:
* if a synchronous UNO call is bridged out from one local UNO environment over
* one remote bridge, and recursively calls back into another local UNO
* environment over another remote bridge, the code in the second environment
* should be executed in the thread that did the original call from the first
* environment.</P>
*
* <P>There are both a Java and a native thread pool factory. A pure Java
* process will always use the Java thread pool factory. A mixed process uses
* the system property <CODE>org.openoffice.native</CODE> (to be set by the
* native code that starts the JVM) to determine which implementation
* to use.</P>
*/
public final class ThreadPoolManager {
/**
* Creates a thread pool instance.
*
* @return a new thread pool instance; will never be <CODE>null</CODE>
*/
public static synchronized IThreadPool create() {
if (useNative) {
return new NativeThreadPool();
} else {
if (javaFactory == null) {
javaFactory = new JavaThreadPoolFactory();
}
return javaFactory.createThreadPool();
}
}
/**
* Leads to using the native thread pool factory, unless a Java thread pool
* has already been created.
*
* @return <CODE>false</CODE> if a Java thread pool has already been created
*/
public static synchronized boolean useNative() {
useNative = javaFactory == null;
return useNative;
}
private static boolean useNative
= System.getProperty("org.openoffice.native") != null;
private static JavaThreadPoolFactory javaFactory = null;
private ThreadPoolManager() {} // do not instantiate
}
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