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package com.sun.grizzly.cometd;
import com.sun.enterprise.web.connector.grizzly.ConcurrentQueue;
import com.sun.enterprise.web.connector.grizzly.SelectorThread;
import com.sun.enterprise.web.connector.grizzly.comet.CometContext;
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.CometInputStream;
import com.sun.grizzly.cometd.bayeux.DeliverResponse;
import com.sun.grizzly.cometd.bayeux.Verb;
import com.sun.grizzly.cometd.bayeux.VerbUtils;
import com.sun.grizzly.cometd.util.JSONParser;
import java.io.IOException;
import java.util.Collection;
import java.util.Collections;
import java.util.List;
import java.util.logging.Level;
import java.util.logging.Logger;
/**
* CometHandler used to support the meta channel Verb Connect and Reconnect.
* The DataHandler is holding the state of the long polled (Comet) connection.
*
* @author Jeanfrancois Arcand
* @author TAKAI, Naoto
*/
public class DataHandler implements CometHandler{
private final static Logger logger = SelectorThread.logger();
private CometdRequest req;
private CometdResponse res;
private String clientId;
private Collection channels = new ConcurrentQueue("DataHandler.channels");
private Collection unmodifiableChannels = null;
private BayeuxCometHandler bayeuxCometHandler;
private boolean wasLast = false;
public DataHandler(BayeuxCometHandler bayeuxCometHandler){
this.bayeuxCometHandler = bayeuxCometHandler;
}
private void writeEnd() throws IOException {
if (!wasLast) {
wasLast = true;
res.write("]*/");
res.flush();
}
}
public void attach(Object[] reqRes){
this.req = (CometdRequest) reqRes[0];
this.res = (CometdResponse) reqRes[1];
wasLast = false;
}
@SuppressWarnings("unchecked")
public synchronized void onEvent(CometEvent event) throws IOException{
Object obj = event.attachment();
try{
if ("NOTIFY_END".equals(obj)) {
CometContext cometContext = event.getCometContext();
if (cometContext.isActive(this)) {
writeEnd();
cometContext.resumeCometHandler(this);
}
return;
} else if (obj instanceof DeliverResponse){
DeliverResponse deliverRes = (DeliverResponse)obj;
String deliverResClientId = deliverRes.getClientId();
if ((deliverResClientId != null &&
deliverResClientId.equals(getClientId()) ||
deliverResClientId == null && getClientId() == null)) {
return;
}
wasLast = deliverRes.isLast();
res.write(deliverRes.toJSON());
res.flush();
}
} catch (Throwable t){
logger.log(Level.SEVERE,"Data.onEvent",t);
}
if (event.getType() == CometEvent.READ){
CometInputStream is = (CometInputStream)obj;
// XXX This is dangerous...
byte[] dataStream = new byte[2 * 8192];
is.setReadTimeout(2000);
while (is.read(dataStream) > 0){
}
String sdata = new String(dataStream).trim();
if (sdata.length() <=1) return;
try{
List verbs =
VerbUtils.parseRequest(JSONParser.parse(sdata));
// Notify our listener;
CometContext cometContext = event.getCometContext();
for (Verb verb : verbs) {
cometContext.notify(
BayeuxCometHandler.newCometdContext(req,res,verb),
CometEvent.NOTIFY,
(Integer)cometContext.getAttribute(
BayeuxCometHandler.BAYEUX_COMET_HANDLER));
}
event.getCometContext().removeAttribute(this);
} catch (Throwable t){
logger.log(Level.SEVERE,"Data.onEvent",t);
}
}
}
public void onInitialize(CometEvent event) throws IOException{
}
public void onTerminate(CometEvent event) throws IOException{
writeEnd();
}
public void onInterrupt(CometEvent event) throws IOException{
}
public synchronized Collection getChannels() {
if (unmodifiableChannels == null) {
unmodifiableChannels = Collections.unmodifiableCollection(channels);
}
return unmodifiableChannels;
}
public synchronized void addChannel(String channel) {
if (channels.contains(channel)) {
throw new IllegalArgumentException(channel);
}
unmodifiableChannels = null;
channels.add(channel);
}
public synchronized boolean removeChannel(String channel) {
unmodifiableChannels = null;
return channels.remove(channel);
}
public String getClientId() {
return clientId;
}
public void setClientId(String clientId) {
this.clientId = clientId;
}
}