DiscoveryAgent


1   /**
2    *
3    * Licensed to the Apache Software Foundation (ASF) under one or more
4    * contributor license agreements.  See the NOTICE file distributed with
5    * this work for additional information regarding copyright ownership.
6    * The ASF licenses this file to You under the Apache License, Version 2.0
7    * (the "License"); you may not use this file except in compliance with
8    * the License.  You may obtain a copy of the License at
9    *
10   * http://www.apache.org/licenses/LICENSE-2.0
11   *
12   * Unless required by applicable law or agreed to in writing, software
13   * distributed under the License is distributed on an "AS IS" BASIS,
14   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
15   * See the License for the specific language governing permissions and
16   * limitations under the License.
17   */
18  package org.apache.activemq.transport.discovery;
19  
20  import java.io.IOException  ;
21  
22  import javax.jms.JMSException  ;
23  
24  import org.apache.activemq.Service;
25  import org.apache.activemq.command.DiscoveryEvent;
26  
27  /**
28   * An agent used to discover other instances of a service. 
29   * 
30   * We typically use a discovery agent to auto-discover JMS clients and JMS brokers on a network
31   *
32   * @version $Revision$
33   */
34  public interface DiscoveryAgent extends Service {
35  
36      /**
37       * Sets the discovery listener
38       * @param listener
39       */
40      public void setDiscoveryListener(DiscoveryListener listener);
41  
42      /**
43       * register a service
44       * @param name
45       * @param details
46       * @throws JMSException
47       */
48      void registerService(String   name) throws IOException  ;
49      
50      /**
51       * A process actively using a service may see it go down before the DiscoveryAgent notices the
52       * service's failure.  That process can use this method to notify the DiscoveryAgent of the failure
53       * so that other listeners of this DiscoveryAgent can also be made aware of the failure.
54       */
55      void serviceFailed(DiscoveryEvent event) throws IOException  ;
56  
57      String   getGroup();    
58      
59      void setGroup(String   group);
60  
61      public void setBrokerName(String   brokerName);
62      
63  }
64
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