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package com.sun.grizzly.cometd;
import com.sun.enterprise.web.connector.grizzly.comet.CometEvent;
import com.sun.enterprise.web.connector.grizzly.comet.CometHandler;
import com.sun.enterprise.web.connector.grizzly.comet.DefaultNotificationHandler;
import com.sun.enterprise.web.connector.grizzly.comet.NotificationHandler;
import com.sun.grizzly.cometd.bayeux.DeliverResponse;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Iterator;
/**
* Customized {@link NotificationHandler} that isolate notification to
* subscribed channel.
*
* @author Jeanfrancois Arcand
*/
public class CometdNotificationHandler extends DefaultNotificationHandler{
/**
* Notify only client subscribed to the active channel.
*/
@Override
protected void notify0(CometEvent cometEvent,Iterator iteratorHandlers)
throws IOException{
ArrayList exceptions = null;
CometHandler handler = null;
Object o = cometEvent.attachment();
String activeChannel = "";
Collection channels = null;
if (o instanceof DeliverResponse){
activeChannel = ((DeliverResponse)o).getChannel();
}
while(iteratorHandlers.hasNext()){
try{
handler = iteratorHandlers.next();
if (handler instanceof CometdHandler){
channels = ((CometdHandler)handler).getChannels();
} else if (handler instanceof DataHandler){
channels = ((DataHandler)handler).getChannels();
}
if (o instanceof String ||
(channels != null
&& (channels.contains(BayeuxCometHandler.BAYEUX_COMET_HANDLER)
|| (activeChannel != null &&
channels.contains(activeChannel))))) {
notify0(cometEvent,handler);
}
} catch (Throwable ex){
if (exceptions == null){
exceptions = new ArrayList();
}
exceptions.add(ex);
}
}
if (exceptions != null){
StringBuffer errorMsg = new StringBuffer();
for(Throwable t: exceptions){
errorMsg.append(t.getMessage());
}
throw new IOException(errorMsg.toString());
}
}
}