| /* |
| * 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.cassandra.streaming.messages; |
| |
| import java.io.IOException; |
| import java.nio.channels.ReadableByteChannel; |
| import java.util.List; |
| |
| import com.google.common.annotations.VisibleForTesting; |
| |
| import org.apache.cassandra.io.compress.CompressionMetadata; |
| import org.apache.cassandra.io.sstable.format.SSTableReader; |
| import org.apache.cassandra.io.util.DataOutputStreamPlus; |
| import org.apache.cassandra.streaming.StreamSession; |
| import org.apache.cassandra.streaming.StreamWriter; |
| import org.apache.cassandra.streaming.compress.CompressedStreamWriter; |
| import org.apache.cassandra.streaming.compress.CompressionInfo; |
| import org.apache.cassandra.utils.Pair; |
| import org.apache.cassandra.utils.concurrent.Ref; |
| |
| /** |
| * OutgoingFileMessage is used to transfer the part(or whole) of a SSTable data file. |
| */ |
| public class OutgoingFileMessage extends StreamMessage |
| { |
| public static Serializer<OutgoingFileMessage> serializer = new Serializer<OutgoingFileMessage>() |
| { |
| public OutgoingFileMessage deserialize(ReadableByteChannel in, int version, StreamSession session) throws IOException |
| { |
| throw new UnsupportedOperationException("Not allowed to call deserialize on an outgoing file"); |
| } |
| |
| public void serialize(OutgoingFileMessage message, DataOutputStreamPlus out, int version, StreamSession session) throws IOException |
| { |
| message.startTransfer(); |
| try |
| { |
| message.serialize(out, version, session); |
| session.fileSent(message.header); |
| } |
| finally |
| { |
| message.finishTransfer(); |
| } |
| } |
| }; |
| |
| public final FileMessageHeader header; |
| private final Ref<SSTableReader> ref; |
| private final String filename; |
| private boolean completed = false; |
| private boolean transferring = false; |
| |
| public OutgoingFileMessage(Ref<SSTableReader> ref, int sequenceNumber, long estimatedKeys, List<Pair<Long, Long>> sections, long repairedAt, boolean keepSSTableLevel) |
| { |
| super(Type.FILE); |
| this.ref = ref; |
| |
| SSTableReader sstable = ref.get(); |
| filename = sstable.getFilename(); |
| this.header = new FileMessageHeader(sstable.metadata.cfId, |
| sequenceNumber, |
| sstable.descriptor.version, |
| sstable.descriptor.formatType, |
| estimatedKeys, |
| sections, |
| sstable.compression ? sstable.getCompressionMetadata() : null, |
| repairedAt, |
| keepSSTableLevel ? sstable.getSSTableLevel() : 0, |
| sstable.header == null ? null : sstable.header.toComponent()); |
| } |
| |
| public synchronized void serialize(DataOutputStreamPlus out, int version, StreamSession session) throws IOException |
| { |
| if (completed) |
| { |
| return; |
| } |
| |
| CompressionInfo compressionInfo = FileMessageHeader.serializer.serialize(header, out, version); |
| |
| final SSTableReader reader = ref.get(); |
| StreamWriter writer = compressionInfo == null ? |
| new StreamWriter(reader, header.sections, session) : |
| new CompressedStreamWriter(reader, header.sections, |
| compressionInfo, session); |
| writer.write(out); |
| } |
| |
| @VisibleForTesting |
| public synchronized void finishTransfer() |
| { |
| transferring = false; |
| //session was aborted mid-transfer, now it's safe to release |
| if (completed) |
| { |
| ref.release(); |
| } |
| } |
| |
| @VisibleForTesting |
| public synchronized void startTransfer() |
| { |
| if (completed) |
| throw new RuntimeException(String.format("Transfer of file %s already completed or aborted (perhaps session failed?).", |
| filename)); |
| transferring = true; |
| } |
| |
| public synchronized void complete() |
| { |
| if (!completed) |
| { |
| completed = true; |
| //release only if not transferring |
| if (!transferring) |
| { |
| ref.release(); |
| } |
| } |
| } |
| |
| @Override |
| public String toString() |
| { |
| return "File (" + header + ", file: " + filename + ")"; |
| } |
| } |
| |