001/**
002 * Copyright 2003-2005 Arthur van Hoff, Rick Blair
003 *
004 * Licensed to the Apache Software Foundation (ASF) under one or more
005 * contributor license agreements.  See the NOTICE file distributed with
006 * this work for additional information regarding copyright ownership.
007 * The ASF licenses this file to You under the Apache License, Version 2.0
008 * (the "License"); you may not use this file except in compliance with
009 * the License.  You may obtain a copy of the License at
010 *
011 *      http://www.apache.org/licenses/LICENSE-2.0
012 *
013 * Unless required by applicable law or agreed to in writing, software
014 * distributed under the License is distributed on an "AS IS" BASIS,
015 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
016 * See the License for the specific language governing permissions and
017 * limitations under the License.
018 */
019package org.apache.activemq.jmdns;
020
021import java.util.EventListener;
022
023/**
024 * Listener for service updates.
025 *
026 * @version %I%, %G%
027 * @author      Arthur van Hoff, Werner Randelshofer
028 */
029public interface ServiceListener extends EventListener
030{
031    /**
032     * A service has been added.
033     *
034     * @param event The ServiceEvent providing the name and fully qualified type
035     *              of the service.
036     */
037    void serviceAdded(ServiceEvent event);
038
039    /**
040     * A service has been removed.
041     *
042     * @param event The ServiceEvent providing the name and fully qualified type
043     *              of the service.
044     */
045    void serviceRemoved(ServiceEvent event);
046
047    /**
048     * A service has been resolved. Its details are now available in the
049     * ServiceInfo record.
050     *
051     * @param event The ServiceEvent providing the name, the fully qualified
052     *              type of the service, and the service info record, or null if the service
053     *              could not be resolved.
054     */
055    void serviceResolved(ServiceEvent event);
056}