ExceptionHandlerThreadGroup.java

/*******************************************************************************
 * Copyright (c) 1998, 2015 Oracle and/or its affiliates. All rights reserved.
 * This program and the accompanying materials are made available under the
 * terms of the Eclipse Public License v1.0 and Eclipse Distribution License v. 1.0
 * which accompanies this distribution.
 * The Eclipse Public License is available at http://www.eclipse.org/legal/epl-v10.html
 * and the Eclipse Distribution License is available at
 * http://www.eclipse.org/org/documents/edl-v10.php.
 *
 * Contributors:
 *     Oracle - initial API and implementation from Oracle TopLink
******************************************************************************/
package org.eclipse.persistence.tools.workbench.utility;

/**
 * This ThreadGroup overrides the #uncaughtException(Thread, Throwable) method
 * and notifies the broadcaster that an exception occurred.
 */
public class ExceptionHandlerThreadGroup
    extends ThreadGroup
{
    /**
     * Broadcasting delegate.
     */
    private final ExceptionBroadcaster broadcaster;


    // ********** constructors/initialization **********

    /**
     * @see ThreadGroup(String)
     */
    public ExceptionHandlerThreadGroup(String name, ExceptionBroadcaster broadcaster) {
        super(name);
        this.broadcaster = broadcaster;
    }

    /**
     * @see ThreadGroup(ThreadGroup, String)
     */
    public ExceptionHandlerThreadGroup(ThreadGroup parent, String name, ExceptionBroadcaster broadcaster) {
        super(parent, name);
        this.broadcaster = broadcaster;
    }


    // ********** ThreadGroup overrides **********

    /**
     * Any uncaught exceptions are forwarded to the broadcaster.
     * @see ThreadGroup#uncaughtException(Thread, Throwable)
     */
    public synchronized void uncaughtException(Thread t, Throwable e) {
        this.broadcaster.broadcast(t, e);
    }


    // ********** public API **********

    /**
     * Return the broadcaster the thread group uses to broadcast any
     * uncaught exceptions.
     */
    public ExceptionBroadcaster getExceptionBroadcaster() {
        return this.broadcaster;
    }

}