/*
* 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.Subscription;
import org.jboss.errai.bus.client.api.messaging.Message;
import org.jboss.errai.bus.client.api.messaging.MessageCallback;
/**
* Reusable bus subscriber which, upon receipt of any message, unsubscribes all subscribers (including itself) on the
* subject it is subscribed to. This effectively makes all listeners on the subject that ServiceCanceller is subscribed
* into "one shot" receivers.
* <p/>
* Within the framework, ServiceCanceller is used for cleaning up conversational message endpoints (because they are
* only expected to receive a single message).
*/
public class ServiceCanceller implements MessageCallback {
private final Subscription subscription;
public ServiceCanceller(final Subscription subscription) {
this.subscription = subscription;
}
@Override
public void callback(final Message message) {
subscription.remove();
}
}