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}