| /** |
| * 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.common.shuffle; |
| |
| import java.io.IOException; |
| import java.io.InputStream; |
| import java.io.OutputStream; |
| |
| import com.google.common.annotations.VisibleForTesting; |
| import org.apache.tez.common.Preconditions; |
| import org.apache.commons.io.input.BoundedInputStream; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| import org.apache.hadoop.conf.Configuration; |
| import org.apache.hadoop.fs.FSDataInputStream; |
| import org.apache.hadoop.fs.FileSystem; |
| import org.apache.hadoop.fs.Path; |
| import org.apache.tez.runtime.library.common.InputAttemptIdentifier; |
| |
| public class LocalDiskFetchedInput extends FetchedInput { |
| private static final Logger LOG = LoggerFactory.getLogger(LocalDiskFetchedInput.class); |
| |
| private final Path inputFile; |
| private final FileSystem localFS; |
| private final long startOffset; |
| private final long size; |
| |
| public LocalDiskFetchedInput(long startOffset, long compressedSize, |
| InputAttemptIdentifier inputAttemptIdentifier, Path inputFile, |
| Configuration conf, FetchedInputCallback callbackHandler) |
| throws IOException { |
| super(inputAttemptIdentifier, callbackHandler); |
| this.size = compressedSize; |
| this.startOffset = startOffset; |
| this.inputFile = inputFile; |
| localFS = FileSystem.getLocal(conf); |
| } |
| |
| @Override |
| public Type getType() { |
| return Type.DISK_DIRECT; |
| } |
| |
| @Override |
| public long getSize() { |
| return size; |
| } |
| |
| @Override |
| public OutputStream getOutputStream() throws IOException { |
| throw new IOException("Output Stream is not supported for " + this.toString()); |
| } |
| |
| @Override |
| public InputStream getInputStream() throws IOException { |
| FSDataInputStream inputStream = localFS.open(inputFile); |
| inputStream.seek(startOffset); |
| return new BoundedInputStream(inputStream, getSize()); |
| } |
| |
| @Override |
| public void commit() { |
| if (isState(State.PENDING)) { |
| setState(State.COMMITTED); |
| notifyFetchComplete(); |
| } |
| } |
| |
| @Override |
| public void abort() { |
| if (isState(State.PENDING)) { |
| setState(State.ABORTED); |
| notifyFetchFailure(); |
| } |
| } |
| |
| @Override |
| public void free() { |
| Preconditions.checkState( |
| isState(State.COMMITTED) || isState(State.ABORTED), |
| "FetchedInput can only be freed after it is committed or aborted"); |
| if (isState(State.COMMITTED)) { // ABORTED would have already called cleanup |
| setState(State.FREED); |
| notifyFreedResource(); |
| } |
| } |
| |
| @Override |
| public String toString() { |
| return "LocalDiskFetchedInput [inputFile path =" + inputFile + |
| ", offset" + startOffset + |
| ", compressedSize=" + getSize() + |
| ", inputAttemptIdentifier=" + getInputAttemptIdentifier() + |
| ", type=" + getType() + |
| ", id=" + getId() + |
| ", state=" + getState() + "]"; |
| } |
| |
| @VisibleForTesting |
| protected Path getInputFile() { |
| return inputFile; |
| } |
| |
| @VisibleForTesting |
| protected long getStartOffset() { |
| return startOffset; |
| } |
| |
| @VisibleForTesting |
| protected FileSystem getLocalFS() { |
| return localFS; |
| } |
| |
| } |