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.runtime.common.utils; 020 021import org.apache.reef.wake.EventHandler; 022 023import java.util.ArrayList; 024import java.util.Collection; 025import java.util.List; 026 027/** 028 * Handler for BroadCastEvent which sends event to all handlers in the list. 029 */ 030public class BroadCastEventHandler<E> implements EventHandler<E> { 031 private final List<EventHandler<E>> handlers; 032 033 public BroadCastEventHandler(final Collection<EventHandler<E>> handlers) { 034 this.handlers = new ArrayList<>(handlers); 035 } 036 037 @Override 038 public void onNext(final E event) { 039 for (final EventHandler<E> handler : handlers) { 040 handler.onNext(event); 041 } 042 } 043 044 public void addEventHandler(final EventHandler<E> eventHandler) { 045 this.handlers.add(eventHandler); 046 } 047 048}