mirror of https://github.com/apache/cassandra
98 lines
3.5 KiB
Java
98 lines
3.5 KiB
Java
package org.apache.cassandra.streaming;
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/*
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*
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* Licensed to the Apache Software Foundation (ASF) under one
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* or more contributor license agreements. See the NOTICE file
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* distributed with this work for additional information
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* regarding copyright ownership. The ASF licenses this file
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* to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance
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* with the License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing,
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* software distributed under the License is distributed on an
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* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
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* KIND, either express or implied. See the License for the
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* specific language governing permissions and limitations
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* under the License.
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*
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*/
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import java.io.*;
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import org.apache.cassandra.concurrent.StageManager;
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import org.apache.cassandra.io.ICompactSerializer;
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import org.apache.cassandra.net.Message;
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import org.apache.cassandra.service.StorageService;
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import org.apache.cassandra.utils.FBUtilities;
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/**
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* This class encapsulates the message that needs to be sent to nodes
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* that handoff data. The message contains information about ranges
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* that need to be transferred and the target node.
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*/
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class StreamRequestMessage
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{
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private static ICompactSerializer<StreamRequestMessage> serializer_;
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static
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{
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serializer_ = new StreamRequestMessageSerializer();
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}
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protected static ICompactSerializer<StreamRequestMessage> serializer()
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{
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return serializer_;
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}
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protected static Message makeStreamRequestMessage(StreamRequestMessage streamRequestMessage)
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{
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ByteArrayOutputStream bos = new ByteArrayOutputStream();
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DataOutputStream dos = new DataOutputStream(bos);
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try
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{
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StreamRequestMessage.serializer().serialize(streamRequestMessage, dos);
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}
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catch (IOException e)
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{
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throw new IOError(e);
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}
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return new Message(FBUtilities.getLocalAddress(), StageManager.STREAM_STAGE, StorageService.Verb.STREAM_REQUEST, bos.toByteArray() );
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}
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protected StreamRequestMetadata[] streamRequestMetadata_ = new StreamRequestMetadata[0];
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// TODO only actually ever need one BM, not an array
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StreamRequestMessage(StreamRequestMetadata... streamRequestMetadata)
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{
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assert streamRequestMetadata != null;
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streamRequestMetadata_ = streamRequestMetadata;
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}
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private static class StreamRequestMessageSerializer implements ICompactSerializer<StreamRequestMessage>
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{
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public void serialize(StreamRequestMessage streamRequestMessage, DataOutputStream dos) throws IOException
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{
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StreamRequestMetadata[] streamRequestMetadata = streamRequestMessage.streamRequestMetadata_;
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dos.writeInt(streamRequestMetadata.length);
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for (StreamRequestMetadata bsmd : streamRequestMetadata)
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{
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StreamRequestMetadata.serializer().serialize(bsmd, dos);
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}
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}
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public StreamRequestMessage deserialize(DataInputStream dis) throws IOException
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{
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int size = dis.readInt();
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StreamRequestMetadata[] streamRequestMetadata = new StreamRequestMetadata[size];
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for (int i = 0; i < size; ++i)
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{
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streamRequestMetadata[i] = StreamRequestMetadata.serializer().deserialize(dis);
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}
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return new StreamRequestMessage(streamRequestMetadata);
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}
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}
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}
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