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     */
019    package org.apache.activemq.jmdns;
020    
021    import java.util.EventListener;
022    
023    /**
024     * Listener for service updates.
025     *
026     * @version %I%, %G%
027     * @author      Arthur van Hoff, Werner Randelshofer
028     */
029    public 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    }