Jetty example source code file (WaitingContinuation.java)

This example Jetty source code file (WaitingContinuation.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" ^TM.

Java - Jetty tags/keywords

illegalstateexception, interruptedexception, interruptedexception, object, object, string, string, waitingcontinuation, waitingcontinuation

The Jetty WaitingContinuation.java source code

//========================================================================
//$Id: WaitingContinuation.java,v 1.1 2005/11/14 17:45:56 gregwilkins Exp $
//Copyright 2004-2005 Mort Bay Consulting Pty. Ltd.
//------------------------------------------------------------------------
//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.mortbay.util.ajax;

public class WaitingContinuation implements org.mortbay.util.ajax.Continuation
{
    Object _mutex;
    Object _object;
    boolean _new=true;
    boolean _resumed=false;
    boolean _pending=false;

    public WaitingContinuation()
    {
        _mutex=this;
    }
    
    public WaitingContinuation(Object mutex)
    {
        _mutex=mutex==null?this:mutex;
    }
    
    public void resume()
    {
        synchronized (_mutex)
        {
            _resumed=true;
            _mutex.notify();
        }
    }
    
    public void reset()
    {
        synchronized (_mutex)
        {
            _resumed=false;
            _pending=false;
            _mutex.notify();
        }
    }

    public boolean isNew()
    {
        return _new;
    }

    public boolean suspend(long timeout)
    {
        synchronized (_mutex)
        {
            _new=false;
            _pending=true;
            boolean result;
            try
            {
                if (!_resumed && timeout>=0)
                {
                    if (timeout==0)
                        _mutex.wait();
                    else if (timeout>0)
                        _mutex.wait(timeout);
                        
                }
            }
            catch (InterruptedException e)
            {
                e.printStackTrace();
            }
            finally
            {
                result=_resumed;
                _resumed=false;
                _pending=false;
            }
            
            return result;
        }
    }
    
    public boolean isPending()
    {
        synchronized (_mutex)
        {
            return _pending;
        }
    }
    
    public boolean isResumed()
    {
        synchronized (_mutex)
        {
            return _resumed;
        }
    }

    public Object getObject()
    {
        return _object;
    }

    public void setObject(Object object)
    {
        _object = object;
    }

    public Object getMutex()
    {
        return _mutex;
    }

    public void setMutex(Object mutex)
    {
        if (!_new && _mutex!=this)
            throw new IllegalStateException();
        _mutex = mutex==null ? this : mutex; 
    }

    public String toString()
    {
        synchronized (this)
        {
            return "WaitingContinuation@"+hashCode()+
            (_new?",new":"")+
            (_pending?",pending":"")+
            (_resumed?",resumed":"");
        }
    }
}