| /* |
| * |
| * 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 java.util.List; |
| |
| import org.apache.qpid.server.filter.MessageFilter; |
| import org.apache.qpid.server.message.ServerMessage; |
| import org.apache.qpid.server.model.OverflowPolicy; |
| import org.apache.qpid.server.model.Queue; |
| import org.apache.qpid.server.virtualhost.QueueManagingVirtualHost; |
| |
| abstract class QueueSizeLimitRespectingTransaction extends QueueEntryTransaction |
| { |
| private final Queue _destinationQueue; |
| private long _pendingQueueDepthBytes; |
| private long _pendingQueueDepthMessages; |
| |
| QueueSizeLimitRespectingTransaction(Queue sourceQueue, |
| List<Long> messageIds, |
| Queue destinationQueue, |
| final MessageFilter filter, |
| final int limit) |
| { |
| super(sourceQueue, messageIds, filter, limit); |
| _destinationQueue = destinationQueue; |
| } |
| |
| @Override |
| protected boolean updateEntry(QueueEntry entry, QueueManagingVirtualHost.Transaction txn) |
| { |
| ServerMessage message = entry.getMessage(); |
| _pendingQueueDepthMessages++; |
| _pendingQueueDepthBytes += message == null ? 0 : message.getSizeIncludingHeader(); |
| boolean underfull = isUnderfull(); |
| if (message != null && !message.isReferenced(_destinationQueue) && underfull) |
| { |
| performOperation(entry, txn, _destinationQueue); |
| } |
| |
| return !underfull; |
| } |
| |
| abstract void performOperation(final QueueEntry entry, |
| final QueueManagingVirtualHost.Transaction txn, |
| final Queue destinationQueue); |
| |
| private boolean isUnderfull() |
| { |
| return _destinationQueue.getOverflowPolicy() == OverflowPolicy.NONE || |
| ((_destinationQueue.getMaximumQueueDepthBytes() < 0 |
| || _destinationQueue.getQueueDepthBytes() + _pendingQueueDepthBytes |
| <= _destinationQueue.getMaximumQueueDepthBytes()) |
| && (_destinationQueue.getMaximumQueueDepthMessages() < 0 |
| || _destinationQueue.getQueueDepthMessages() + _pendingQueueDepthMessages |
| <= _destinationQueue.getMaximumQueueDepthMessages())); |
| } |
| } |