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// **********************************************************************
//
// Copyright (c) 2003-2014 ZeroC, Inc. All rights reserved.
//
// This copy of Ice is licensed to you under the terms described in the
// ICE_LICENSE file included in this distribution.
//
// **********************************************************************
package IceInternal;
import java.util.List;
final class ThreadPoolWorkQueue extends EventHandler
{
ThreadPoolWorkQueue(Instance instance, ThreadPool threadPool, Selector selector)
{
_threadPool = threadPool;
_selector = selector;
_destroyed = false;
_registered = SocketOperation.Read;
}
@Override
protected synchronized void finalize() throws Throwable
{
try
{
IceUtilInternal.Assert.FinalizerAssert(_destroyed);
}
catch(java.lang.Exception ex)
{
}
finally
{
super.finalize();
}
}
synchronized void destroy()
{
assert(!_destroyed);
_destroyed = true;
_selector.wakeup();
}
synchronized void queue(ThreadPoolWorkItem item)
{
if(_destroyed)
{
throw new Ice.CommunicatorDestroyedException();
}
assert(item != null);
_workItems.add(item);
_selector.wakeup();
}
@Override
public void message(ThreadPoolCurrent current)
{
ThreadPoolWorkItem workItem = null;
synchronized(this)
{
if(!_workItems.isEmpty())
{
workItem = _workItems.removeFirst();
assert(workItem != null);
}
else
{
assert(_destroyed);
_selector.wakeup();
}
}
if(workItem != null)
{
workItem.execute(current);
}
else
{
_threadPool.ioCompleted(current);
throw new ThreadPool.DestroyedException();
}
}
@Override
public void finished(ThreadPoolCurrent current, boolean close)
{
assert(false);
}
@Override
public String toString()
{
return "work queue";
}
@Override
public java.nio.channels.SelectableChannel fd()
{
return null;
}
// Return the number of pending events.
synchronized int size()
{
int sz = _workItems.size();
if(_destroyed)
{
sz++;
}
return sz;
}
synchronized void update(List<EventHandlerOpPair> handlers)
{
int sz = size();
while(sz > 0)
{
handlers.add(_opPair);
--sz;
}
}
private final ThreadPool _threadPool;
private boolean _destroyed;
private Selector _selector;
private EventHandlerOpPair _opPair = new EventHandlerOpPair(this, SocketOperation.Read);
private java.util.LinkedList<ThreadPoolWorkItem> _workItems = new java.util.LinkedList<ThreadPoolWorkItem>();
}
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