/************************************************************** * * Licensed to the Apache Software Foundation (ASF) under one * or more contributor license agreements. See the NOTICE file * distributed with this work for additional information * regarding copyright ownership. The ASF licenses this file * to you under the Apache License, Version 2.0 (the * "License"); you may not use this file except in compliance * with the License. You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, * software distributed under the License is distributed on an * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY * KIND, either express or implied. See the License for the * specific language governing permissions and limitations * under the License. * *************************************************************/ package com.sun.star.lib.uno.environments.remote; /** * Manages the UNO thread pool factory. * *
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.
* *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 org.openoffice.native
(to be set by the
* native code that starts the JVM) to determine which implementation
* to use.
null
*/
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 false
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
}