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.policy;
018
019import java.util.LinkedList;
020
021import org.apache.activemq.broker.region.MessageReference;
022
023/**
024 * An eviction strategy which evicts the oldest message first (which is the
025 * default).
026 * 
027 * @org.apache.xbean.XBean
028 * 
029 * 
030 */
031public class OldestMessageEvictionStrategy extends MessageEvictionStrategySupport  {
032
033    public MessageReference[] evictMessages(LinkedList messages) {
034        return new MessageReference[] {(MessageReference) messages.removeFirst()};
035    }
036}