1 /** 2 * 3 * Copyright 2003-2004 The Apache Software Foundation 4 * 5 * Licensed under the Apache License, Version 2.0 (the "License"); 6 * you may not use this file except in compliance with the License. 7 * You may obtain a copy of the License at 8 * 9 * http://www.apache.org/licenses/LICENSE-2.0 10 * 11 * Unless required by applicable law or agreed to in writing, software 12 * distributed under the License is distributed on an "AS IS" BASIS, 13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 14 * See the License for the specific language governing permissions and 15 * limitations under the License. 16 */ 17 18 package org.apache.geronimo.clustering; 19 20 import java.util.List; 21 22 /** 23 * An interface implemented by components that wish to be notified 24 * upon membership of a Cluster changing. 25 * 26 * @version $Rev: 46019 $ $Date: 2004-09-14 02:56:06 -0700 (Tue, 14 Sep 2004) $ 27 */ 28 public interface 29 MetaDataListener 30 { 31 /** 32 * Called by Cluster when a change in membership occurs. This is 33 * better than a memberLeft/memberJoined notification as it can 34 * handle multiple concurrent leave/joins, this may occur in the 35 * case of event elysion... 36 * 37 * @param members a <code>List</code> of members. 38 */ 39 public void setMetaData(List members); 40 } 41