/*
* Copyright (C) 2011 Red Hat, Inc. and/or its affiliates.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.jboss.errai.bus.client.api.base;
import org.jboss.errai.bus.client.api.messaging.Message;
import org.jboss.errai.bus.client.api.messaging.MessageCallback;
import org.jboss.errai.bus.client.api.messaging.MessageBus;
import org.jboss.errai.bus.client.api.RoutingFlag;
import org.jboss.errai.common.client.protocols.MessageParts;
/**
* Utilities for creating conversational messages on the bus.
*
* @author Mike Brock
* @author Jonathan Fuerth <jfuerth@redhat.com>
* @author Christian Sadilek <csadilek@redhat.com>
* @author Max Barkley <mbarkley@redhat.com>
*/
class ConversationHelper {
private static final String RES_NAME = "MessageReplyCallback";
private static volatile int counter = 0;
private static final Object counterLock = new Object();
static void makeConversational(Message message, MessageCallback callback) {
message.setResource(RES_NAME, callback);
message.setFlag(RoutingFlag.Conversational);
}
static void createConversationService(MessageBus bus, Message m) {
if (m.isFlagSet(RoutingFlag.Conversational)) {
final String replyService = m.getSubject() + ":" + count() + ":RespondTo:RPC";
bus.subscribe(replyService, new ServiceCanceller(bus.subscribe(replyService, m.getResource(MessageCallback.class, RES_NAME))));
m.set(MessageParts.ReplyTo, replyService);
}
}
static boolean hasConversationCallback(Message message) {
return message.hasResource(RES_NAME);
}
static int count() {
synchronized (counterLock) {
return ++counter;
}
}
}