| /* |
| * |
| * 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.store; |
| |
| import org.apache.qpid.server.bytebuffer.QpidByteBuffer; |
| |
| public class StoredMemoryMessage<T extends StorableMessageMetaData> implements StoredMessage<T>, MessageHandle<T> |
| { |
| private final long _messageNumber; |
| private final int _contentSize; |
| private final int _metadataSize; |
| private QpidByteBuffer _content = null; |
| private volatile T _metaData; |
| |
| public StoredMemoryMessage(long messageNumber, T metaData) |
| { |
| _messageNumber = messageNumber; |
| _metaData = metaData; |
| _contentSize = _metaData.getContentSize(); |
| _metadataSize = _metaData.getStorableSize(); |
| } |
| |
| @Override |
| public long getMessageNumber() |
| { |
| return _messageNumber; |
| } |
| |
| @Override |
| public synchronized void addContent(QpidByteBuffer src) |
| { |
| try (QpidByteBuffer content = _content) |
| { |
| if (content == null) |
| { |
| _content = src.slice(); |
| } |
| else |
| { |
| _content = QpidByteBuffer.concatenate(content, src); |
| } |
| } |
| } |
| |
| @Override |
| public synchronized StoredMessage<T> allContentAdded() |
| { |
| return this; |
| } |
| |
| |
| @Override |
| public synchronized QpidByteBuffer getContent(int offset, int length) |
| { |
| if (_content == null) |
| { |
| return QpidByteBuffer.emptyQpidByteBuffer(); |
| } |
| |
| try (QpidByteBuffer combined = QpidByteBuffer.concatenate(_content)) |
| { |
| if (length == Integer.MAX_VALUE) |
| { |
| length = combined.remaining(); |
| } |
| return combined.view(offset, length); |
| } |
| } |
| |
| @Override |
| public int getContentSize() |
| { |
| return _contentSize; |
| } |
| |
| @Override |
| public int getMetadataSize() |
| { |
| return _metadataSize; |
| } |
| |
| @Override |
| public T getMetaData() |
| { |
| return _metaData; |
| } |
| |
| @Override |
| public synchronized void remove() |
| { |
| _metaData.dispose(); |
| _metaData = null; |
| if (_content != null) |
| { |
| _content.dispose(); |
| _content = null; |
| } |
| } |
| |
| @Override |
| public boolean isInContentInMemory() |
| { |
| return true; |
| } |
| |
| @Override |
| public long getInMemorySize() |
| { |
| return getContentSize() + getMetadataSize(); |
| } |
| |
| @Override |
| public boolean flowToDisk() |
| { |
| return false; |
| } |
| |
| @Override |
| public synchronized void reallocate() |
| { |
| _metaData.reallocate(); |
| _content = QpidByteBuffer.reallocateIfNecessary(_content); |
| } |
| |
| public void clear() |
| { |
| remove(); |
| } |
| } |