/*
* The contents of this file are subject to the terms
* of the Common Development and Distribution License
* (the License). You may not use this file except in
* compliance with the License.
*
* You can obtain a copy of the license at
* https://glassfish.dev.java.net/public/CDDLv1.0.html or
* glassfish/bootstrap/legal/CDDLv1.0.txt.
* See the License for the specific language governing
* permissions and limitations under the License.
*
* When distributing Covered Code, include this CDDL
* Header Notice in each file and include the License file
* at glassfish/bootstrap/legal/CDDLv1.0.txt.
* If applicable, add the following below the CDDL Header,
* with the fields enclosed by brackets [] replaced by
* you own identifying information:
* "Portions Copyrighted [year] [name of copyright owner]"
*
* Copyright 2006 Sun Microsystems, Inc. All rights reserved.
*/
package com.sun.grizzly.rails;
import com.sun.enterprise.web.connector.grizzly.AsyncExecutor;
import com.sun.enterprise.web.connector.grizzly.AsyncFilter;
import com.sun.enterprise.web.connector.grizzly.AsyncTask;
import com.sun.enterprise.web.connector.grizzly.async.AsyncProcessorTask;
import java.io.IOException;
import java.util.concurrent.BlockingQueue;
import java.util.concurrent.LinkedBlockingQueue;
/**
* AyncFilter that park the request if the number of Ruby runtime are all in use.
*
* @author Jeanfrancois Arcand
*/
public class RailAsyncFilter implements AsyncFilter {
private BlockingQueue rubyRuntimeQueue;
private LinkedBlockingQueue<AsyncProcessorTask> parkedRequest
= new LinkedBlockingQueue<AsyncProcessorTask>();
public RailAsyncFilter() {
}
public boolean doFilter(AsyncExecutor asyncExecutor) {
AsyncProcessorTask apt = (AsyncProcessorTask)asyncExecutor.getAsyncTask();
if (rubyRuntimeQueue.size() == 0){
parkedRequest.offer(apt);
return false;
} else {
try{
apt.getProcessorTask().invokeAdapter();
} catch (IllegalStateException ex){
parkedRequest.offer(apt);
return false;
}
apt.setStage(AsyncTask.POST_EXECUTE);
return true;
}
}
protected void setRubyRuntimeQueue(BlockingQueue rubyRuntimeQueue){
this.rubyRuntimeQueue = rubyRuntimeQueue;
}
protected void unpark(){
AsyncProcessorTask apt = parkedRequest.poll();
if (apt == null) return;
apt.setStage(AsyncTask.EXECUTE);
try{
apt.doTask();
} catch (IllegalStateException e) {
// Runtime was zero, add the token back to the queue.
parkedRequest.offer(apt);
} catch (IOException ex){
; //
}
}
}
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