| /** |
| * 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 org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| import org.apache.hadoop.conf.Configuration; |
| import org.apache.hadoop.fs.FileSystem; |
| import org.apache.hadoop.fs.LocalDirAllocator; |
| import org.apache.hadoop.fs.Path; |
| import org.apache.tez.runtime.library.common.InputAttemptIdentifier; |
| import org.apache.tez.runtime.library.common.task.local.output.TezTaskOutputFiles; |
| |
| import org.apache.tez.common.Preconditions; |
| |
| public class DiskFetchedInput extends FetchedInput { |
| |
| private static final Logger LOG = LoggerFactory.getLogger(DiskFetchedInput.class); |
| |
| private final FileSystem localFS; |
| private final Path tmpOutputPath; |
| private final Path outputPath; |
| private final long size; |
| |
| public DiskFetchedInput(long compressedSize, |
| InputAttemptIdentifier inputAttemptIdentifier, |
| FetchedInputCallback callbackHandler, Configuration conf, |
| LocalDirAllocator localDirAllocator, TezTaskOutputFiles filenameAllocator) |
| throws IOException { |
| super(inputAttemptIdentifier, callbackHandler); |
| |
| this.size = compressedSize; |
| this.localFS = FileSystem.getLocal(conf).getRaw(); |
| this.outputPath = filenameAllocator.getInputFileForWrite( |
| this.getInputAttemptIdentifier().getInputIdentifier(), this |
| .getInputAttemptIdentifier().getSpillEventId(), this.size); |
| // Files are not clobbered due to the id being appended to the outputPath in the tmpPath, |
| // otherwise fetches for the same task but from different attempts would clobber each other. |
| this.tmpOutputPath = outputPath.suffix(String.valueOf(getId())); |
| } |
| |
| @Override |
| public Type getType() { |
| return Type.DISK; |
| } |
| |
| @Override |
| public long getSize() { |
| return size; |
| } |
| |
| @Override |
| public OutputStream getOutputStream() throws IOException { |
| return localFS.create(tmpOutputPath); |
| } |
| |
| @Override |
| public InputStream getInputStream() throws IOException { |
| return localFS.open(outputPath); |
| } |
| |
| public final Path getInputPath() { |
| if (isState(State.COMMITTED)) { |
| return this.outputPath; |
| } |
| return this.tmpOutputPath; |
| } |
| |
| @Override |
| public void commit() throws IOException { |
| if (isState(State.PENDING)) { |
| setState(State.COMMITTED); |
| localFS.rename(tmpOutputPath, outputPath); |
| notifyFetchComplete(); |
| } |
| } |
| |
| @Override |
| public void abort() throws IOException { |
| if (isState(State.PENDING)) { |
| setState(State.ABORTED); |
| // TODO NEWTEZ Maybe defer this to container cleanup |
| localFS.delete(tmpOutputPath, false); |
| 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)) { |
| setState(State.FREED); |
| try { |
| // TODO NEWTEZ Maybe defer this to container cleanup |
| localFS.delete(outputPath, false); |
| } catch (IOException e) { |
| // Ignoring the exception, will eventually be cleaned by container |
| // cleanup. |
| LOG.warn("Failed to remvoe file : " + outputPath.toString()); |
| } |
| notifyFreedResource(); |
| } |
| } |
| |
| @Override |
| public String toString() { |
| return "DiskFetchedInput [outputPath=" + outputPath |
| + ", inputAttemptIdentifier=" + getInputAttemptIdentifier() |
| + ", actualSize=" + getSize() |
| + ", type=" + getType() + ", id=" + getId() + ", state=" + getState() + "]"; |
| } |
| } |