content: /**
   * Licensed to the Apache Software Foundation (ASF) under one or more
   * contributor license agreements.  See the NOTICE file distributed with
   * this work for additional information regarding copyright ownership.
   * The ASF licenses this file to You 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.apache.activemq.transport.discovery;
  
  import java.io.IOException;
  
  import org.apache.activemq.Service;
  import org.apache.activemq.command.DiscoveryEvent;
  
  /**
   * An agent used to discover other instances of a service. 
   * 
   * We typically use a discovery agent to auto-discover JMS clients and JMS brokers on a network
   *
   * 
   */
  public interface DiscoveryAgent extends Service {
  
      /**
       * Sets the discovery listener
       * @param listener
       */
      void setDiscoveryListener(DiscoveryListener listener);
  
      /**
       * register a service
       * @param name
       * @throws IOException
       */
      void registerService(String name) throws IOException;
      
      /**
       * A process actively using a service may see it go down before the DiscoveryAgent notices the
       * service's failure.  That process can use this method to notify the DiscoveryAgent of the failure
       * so that other listeners of this DiscoveryAgent can also be made aware of the failure.
       */
      void serviceFailed(DiscoveryEvent event) throws IOException;
      
  }
  