001/*
002 * Licensed to the Apache Software Foundation (ASF) under one
003 * or more contributor license agreements.  See the NOTICE file
004 * distributed with this work for additional information
005 * regarding copyright ownership.  The ASF licenses this file
006 * to you under the Apache License, Version 2.0 (the
007 * "License"); you may not use this file except in compliance
008 * with the License.  You may obtain a copy of the License at
009 *
010 *   http://www.apache.org/licenses/LICENSE-2.0
011 *
012 * Unless required by applicable law or agreed to in writing,
013 * software distributed under the License is distributed on an
014 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
015 * KIND, either express or implied.  See the License for the
016 * specific language governing permissions and limitations
017 * under the License.
018 */
019package org.apache.reef.io.network.group.api.task;
020
021import org.apache.reef.io.network.group.impl.GroupCommunicationMessage;
022import org.apache.reef.io.network.group.impl.task.CommGroupNetworkHandlerImpl;
023import org.apache.reef.tang.annotations.DefaultImplementation;
024import org.apache.reef.tang.annotations.Name;
025import org.apache.reef.wake.EventHandler;
026
027/**
028 * The EventHandler that receives the GroupCommunicationMsg.
029 * pertaining to a specific Communication Group
030 */
031@DefaultImplementation(value = CommGroupNetworkHandlerImpl.class)
032public interface CommGroupNetworkHandler extends EventHandler<GroupCommunicationMessage> {
033
034  void register(Class<? extends Name<String>> operName, EventHandler<GroupCommunicationMessage> handler);
035
036  void addTopologyElement(Class<? extends Name<String>> operName);
037
038  GroupCommunicationMessage waitForTopologyUpdate(Class<? extends Name<String>> operName);
039
040  byte[] waitForTopologyChanges(Class<? extends Name<String>> operName);
041}