broker-core/src/main/java/org/apache/qpid/server/queue/StandardQueueEntryList.java

/*
 *
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 *
 */
package org.apache.qpid.server.queue;

import org.apache.qpid.server.message.ServerMessage;
import org.apache.qpid.server.store.MessageEnqueueRecord;

public class StandardQueueEntryList extends OrderedQueueEntryList
{

    private static final HeadCreator HEAD_CREATOR = new HeadCreator()
    {
        @Override
        public StandardQueueEntry createHead(final QueueEntryList list)
        {
            return new StandardQueueEntry((StandardQueueEntryList) list);
        }
    };

    public StandardQueueEntryList(final StandardQueue<?> queue, QueueStatistics queueStatistics)
    {
        super(queue, queueStatistics, HEAD_CREATOR);
    }


    @Override
    protected StandardQueueEntry createQueueEntry(ServerMessage<?> message,
                                                  final MessageEnqueueRecord enqueueRecord)
    {
        return new StandardQueueEntry(this, message, enqueueRecord);
    }


    @Override
    public QueueEntry getLeastSignificantOldestEntry()
    {
        return getOldestEntry();
    }
}