/**
* 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.tez.runtime.library.shuffle.common;
import java.io.ByteArrayInputStream;
import java.io.InputStream;
import java.io.OutputStream;
import org.apache.hadoop.io.BoundedByteArrayOutputStream;
import org.apache.tez.runtime.library.common.InputAttemptIdentifier;
import com.google.common.base.Preconditions;
public class MemoryFetchedInput extends FetchedInput {
private BoundedByteArrayOutputStream byteStream;
public MemoryFetchedInput(long actualSize, long compressedSize,
InputAttemptIdentifier inputAttemptIdentifier,
FetchedInputCallback callbackHandler) {
super(Type.MEMORY, actualSize, compressedSize, inputAttemptIdentifier, callbackHandler);
this.byteStream = new BoundedByteArrayOutputStream((int) actualSize);
}
@Override
public OutputStream getOutputStream() {
return byteStream;
}
@Override
public InputStream getInputStream() {
return new ByteArrayInputStream(byteStream.getBuffer());
}
public byte[] getBytes() {
return byteStream.getBuffer();
}
@Override
public void commit() {
if (state == State.PENDING) {
state = State.COMMITTED;
notifyFetchComplete();
}
}
@Override
public void abort() {
if (state == State.PENDING) {
state = State.ABORTED;
notifyFetchFailure();
}
}
@Override
public void free() {
Preconditions.checkState(
state == State.COMMITTED || state == State.ABORTED,
"FetchedInput can only be freed after it is committed or aborted");
if (state == State.COMMITTED) { // ABORTED would have already called cleanup
state = State.FREED;
this.byteStream = null;
notifyFreedResource();
}
}
@Override
public String toString() {
return "MemoryFetchedInput [inputAttemptIdentifier="
+ inputAttemptIdentifier + ", actualSize=" + actualSize
+ ", compressedSize=" + compressedSize + ", type=" + type + ", id="
+ id + ", state=" + state + "]";
}
}