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package com.sun.enterprise.web.connector.grizzly.comet;
import com.sun.enterprise.web.connector.grizzly.AsyncExecutor;
import com.sun.enterprise.web.connector.grizzly.AsyncFilter;
import com.sun.enterprise.web.connector.grizzly.SelectorThread;
import com.sun.enterprise.web.connector.grizzly.async.AsyncProcessorTask;
import java.io.IOException;
import java.util.logging.Level;
import java.util.logging.Logger;
/**
* AJAX/Comet support using the Grizzly Asynchronous Request Processing
* default mechanism.
*
* Instance of this class represent an interrupted/polled/Comet request.
*
* Note: The request can be resumed anytime, and the polled request is not
* holding a thread.
*
* @author Jeanfrancois Arcand
*/
public class CometAsyncFilter implements AsyncFilter {
/**
* Main logger
*/
private final static Logger logger = SelectorThread.logger();
/**
* Comet Async Filter.
*/
public CometAsyncFilter() {
}
/**
* Execute the Comet {@link AsyncFilter} by delegating the work to the
* {@link CometEngine}. At this stage, the request has already
* been interrupted.
*/
public boolean doFilter(AsyncExecutor asyncExecutor) {
AsyncProcessorTask apt = (AsyncProcessorTask)asyncExecutor.getAsyncTask();
CometEngine cometEngine = CometEngine.getEngine();
try{
if (!cometEngine.handle(apt)) {
return true;
}
} catch (IOException ex){
logger.log(Level.SEVERE,"CometAsyncFilter",ex);
}
return false;
}
}