001/** 002 * Licensed to the Apache Software Foundation (ASF) under one or more 003 * contributor license agreements. See the NOTICE file distributed with 004 * this work for additional information regarding copyright ownership. 005 * The ASF licenses this file to You under the Apache License, Version 2.0 006 * (the "License"); you may not use this file except in compliance with 007 * the License. You may obtain a copy of the License at 008 * 009 * http://www.apache.org/licenses/LICENSE-2.0 010 * 011 * Unless required by applicable law or agreed to in writing, software 012 * distributed under the License is distributed on an "AS IS" BASIS, 013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 014 * See the License for the specific language governing permissions and 015 * limitations under the License. 016 */ 017package org.apache.activemq.broker.region.group; 018 019import java.util.HashSet; 020import java.util.Set; 021 022/** 023 * A simple implementation which just uses a {@link Set} 024 * 025 * 026 */ 027public class SimpleMessageGroupSet implements MessageGroupSet { 028 029 private Set<String> set = new HashSet<String>(); 030 031 public boolean contains(String groupID) { 032 return set.contains(groupID); 033 } 034 035 public void add(String group) { 036 set.add(group); 037 } 038 039 protected Set<String> getUnderlyingSet(){ 040 return set; 041 } 042 043}