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/*
* Fabric3
* Copyright (c) 2009-2011 Metaform Systems
*
* Fabric3 is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as
* published by the Free Software Foundation, either version 3 of
* the License, or (at your option) any later version, with the
* following exception:
*
* Linking this software statically or dynamically with other
* modules is making a combined work based on this software.
* Thus, the terms and conditions of the GNU General Public
* License cover the whole combination.
*
* As a special exception, the copyright holders of this software
* give you permission to link this software with independent
* modules to produce an executable, regardless of the license
* terms of these independent modules, and to copy and distribute
* the resulting executable under terms of your choice, provided
* that you also meet, for each linked independent module, the
* terms and conditions of the license of that module. An
* independent module is a module which is not derived from or
* based on this software. If you modify this software, you may
* extend this exception to your version of the software, but
* you are not obligated to do so. If you do not wish to do so,
* delete this exception statement from your version.
*
* Fabric3 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 General Public License for more details.
*
* You should have received a copy of the
* GNU General Public License along with Fabric3.
* If not, see .
*/
package org.fabric3.threadpool;

import java.util.concurrent.ThreadFactory;
import java.util.concurrent.atomic.AtomicInteger;

/**
 * Factory that returns named threads and sets an uncaught exception handler that forwards exceptions to a monitor.
 *
 * @version $Rev: 9763 $ $Date: 2011-01-03 00:48:06 +0000 (Mon, 03 Jan 2011) $
 */
public class RuntimeThreadFactory implements ThreadFactory {
    private AtomicInteger number = new AtomicInteger(1);
    private ThreadGroup group;
    private String prefix;
    private RuntimeUncaughtExceptionHandler handler;

    public RuntimeThreadFactory(ExecutorMonitor monitor) {
        SecurityManager s = System.getSecurityManager();
        group = (s != null) ? s.getThreadGroup() : Thread.currentThread().getThreadGroup();
        prefix = "pooled:";
        handler = new RuntimeUncaughtExceptionHandler(monitor);
    }

    public Thread newThread(Runnable r) {
        Thread thread = new Thread(group, r, prefix + number.getAndIncrement(), 0);
        if (thread.isDaemon()) {
            thread.setDaemon(false);
        }
        if (thread.getPriority() != Thread.NORM_PRIORITY) {
            thread.setPriority(Thread.NORM_PRIORITY);
        }
        thread.setUncaughtExceptionHandler(handler);
        return thread;
    }

    private class RuntimeUncaughtExceptionHandler implements Thread.UncaughtExceptionHandler {
        private ExecutorMonitor monitor;

        private RuntimeUncaughtExceptionHandler(ExecutorMonitor monitor) {
            this.monitor = monitor;
        }

        public void uncaughtException(Thread t, Throwable e) {
            monitor.threadError(e);
        }
    }
}