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
019/**
020 * A factory to create instances of {@link SimpleMessageGroupMap} when
021 * implementing the <a
022 * href="http://activemq.apache.org/message-groups.html">Message
023 * Groups</a> functionality.
024 * 
025 * @org.apache.xbean.XBean
026 * 
027 * 
028 */
029public class MessageGroupHashBucketFactory implements MessageGroupMapFactory {
030
031    private int bucketCount = 1024;
032    private int cacheSize = 64;
033
034    public MessageGroupMap createMessageGroupMap() {
035        return new MessageGroupHashBucket(getBucketCount(), getCacheSize());
036    }
037
038    public int getBucketCount() {
039        return bucketCount;
040    }
041
042    /**
043     * Sets the number of hash buckets to use for the message group
044     * functionality. This is only applicable to using message groups to
045     * parallelize processing of a queue while preserving order across an
046     * individual JMSXGroupID header value. This value sets the number of hash
047     * buckets that will be used (i.e. the maximum possible concurrency).
048     */
049    public void setBucketCount(int bucketCount) {
050        this.bucketCount = bucketCount;
051    }
052
053    public int getCacheSize() {
054        return cacheSize;
055    }
056
057    public void setCacheSize(int cacheSize) {
058        this.cacheSize = cacheSize;
059    }
060
061}