/*
* 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;
import org.jboss.errai.bus.client.framework.SubscriptionEvent;
/**
* Callback interface for receiving notifications when a subscription is
* de-registered on the bus.
*
* @see org.jboss.errai.bus.client.api.messaging.MessageBus#addUnsubscribeListener(UnsubscribeListener)
*/
public interface UnsubscribeListener {
/**
* Called when a subscription is de-registered from the bus.
*
* @param event event describing the subscription cancellation.
*/
public void onUnsubscribe(SubscriptionEvent event);
}