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DummyChunkInputStream.java
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DummyChunkInputStream.java
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/*
* 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.hadoop.hdds.scm.storage;
import java.util.ArrayList;
import java.util.List;
import org.apache.hadoop.hdds.client.BlockID;
import org.apache.hadoop.hdds.protocol.datanode.proto.ContainerProtos.ChunkInfo;
import org.apache.hadoop.hdds.scm.XceiverClientFactory;
import org.apache.hadoop.hdds.scm.pipeline.Pipeline;
import org.apache.ratis.thirdparty.com.google.protobuf.ByteString;
/**
* A dummy ChunkInputStream to mock read chunk calls to DN.
*/
public class DummyChunkInputStream extends ChunkInputStream {
private final byte[] chunkData;
// Stores the read chunk data in each readChunk call
private final List<ByteString> readByteBuffers = new ArrayList<>();
public DummyChunkInputStream(ChunkInfo chunkInfo,
BlockID blockId,
XceiverClientFactory xceiverClientFactory,
boolean verifyChecksum,
byte[] data, Pipeline pipeline) {
super(chunkInfo, blockId, xceiverClientFactory, () -> pipeline,
verifyChecksum, null);
this.chunkData = data.clone();
}
@Override
protected ByteString readChunk(ChunkInfo readChunkInfo) {
ByteString byteString = ByteString.copyFrom(chunkData,
(int) readChunkInfo.getOffset(),
(int) readChunkInfo.getLen());
getReadByteBuffers().add(byteString);
return byteString;
}
@Override
protected void acquireClient() {
// No action needed
}
@Override
protected void releaseClient() {
// no-op
}
public List<ByteString> getReadByteBuffers() {
return readByteBuffers;
}
}