| /* |
| * |
| * 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.transfer; |
| |
| import java.util.concurrent.atomic.AtomicReferenceFieldUpdater; |
| |
| import org.apache.qpid.server.queue.QueueEntry; |
| |
| final class QueueContext |
| { |
| private volatile QueueEntry _lastSeenEntry; |
| private volatile QueueEntry _releasedEntry; |
| |
| static final AtomicReferenceFieldUpdater<QueueContext, QueueEntry> |
| _lastSeenUpdater = |
| AtomicReferenceFieldUpdater.newUpdater |
| (QueueContext.class, QueueEntry.class, "_lastSeenEntry"); |
| static final AtomicReferenceFieldUpdater<QueueContext, QueueEntry> |
| _releasedUpdater = |
| AtomicReferenceFieldUpdater.newUpdater |
| (QueueContext.class, QueueEntry.class, "_releasedEntry"); |
| |
| public QueueContext(QueueEntry head) |
| { |
| _lastSeenEntry = head; |
| } |
| |
| public QueueEntry getLastSeenEntry() |
| { |
| return _lastSeenEntry; |
| } |
| |
| |
| QueueEntry getReleasedEntry() |
| { |
| return _releasedEntry; |
| } |
| |
| @Override |
| public String toString() |
| { |
| return "QueueContext{" + |
| "_lastSeenEntry=" + _lastSeenEntry + |
| ", _releasedEntry=" + _releasedEntry + |
| '}'; |
| } |
| } |