| /** |
| * 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 + "]"; |
| } |
| } |