org.apache.felix.eventadmin/src/main/java/org/apache/felix/eventadmin/impl/tasks/ResumeTask.java

/*
 *   Copyright 2005 The Apache Software Foundation
 *
 *   Licensed 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 org.apache.felix.eventadmin.impl.tasks;

import org.apache.felix.eventadmin.impl.dispatch.ThreadPool;

/**
 * A task that wakes-up a disabled <tt>DispatchTask</tt>. Additionally, it will
 * stop the currently running task.
 * 
 * @author <a href="mailto:felix-dev@incubator.apache.org">Felix Project Team</a>
 */
public class ResumeTask implements HandlerTask
{
    // The task to wake-up on execution
    private final DispatchTask m_target;
    
    // The pool used to get the task to stop on execution
    private final ThreadPool m_pool;
    
    /**
     * @param target The task to wake-up on execution
     * @param pool The pool used to get the task to stop on execution
     */
    public ResumeTask(final DispatchTask target, final ThreadPool pool)
    {
        m_target = target;
        
        m_pool = pool;
    }
    
    /**
     * Stop the current task and wake-up the target.
     * 
     * @see org.apache.felix.eventadmin.impl.tasks.HandlerTask#execute()
     */
    public void execute()
    {
        m_pool.getTask(Thread.currentThread(), null).stop();
        
        m_target.resume();
    }

    /**
     * This does nothing since this task is only used to wake-up disabled tasks.
     * 
     * @see org.apache.felix.eventadmin.impl.tasks.HandlerTask#blackListHandler()
     */
    public void blackListHandler()
    {
    }
}