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package org.apache.tuscany.sca.sample.comet;
import java.util.ArrayList;
import java.util.concurrent.CopyOnWriteArrayList;
import org.apache.tuscany.sca.binding.comet.runtime.callback.CometCallback;
import org.apache.tuscany.sca.binding.comet.runtime.callback.Status;
import org.oasisopen.sca.ComponentContext;
import org.oasisopen.sca.annotation.Context;
import org.oasisopen.sca.annotation.Scope;
import org.oasisopen.sca.annotation.Service;
@Service(ChatService.class)
@Scope("COMPOSITE")
public class ChatServiceImpl implements ChatService {
@Context
protected ComponentContext context;
private CopyOnWriteArrayList<CometCallback> clients = new CopyOnWriteArrayList<CometCallback>();
@Override
public void postMessage(String user, String message) {
for (CometCallback callback : new ArrayList<CometCallback>(clients)) {
Status status = callback.sendMessage(user + ": " + message);
if (status == Status.CLIENT_DISCONNECTED) {
clients.remove(callback);
}
}
}
@Override
public void register() {
// saving the callback object during register() method so it will push data back to the client
// using the callback method defined for the register operation in the js when used
clients.add(context.getRequestContext().<CometCallback> getCallback());
}
}
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