| /** |
| * 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; |
| |
| import org.apache.hadoop.classification.InterfaceAudience.Private; |
| import org.apache.tez.dag.api.TezUncheckedException; |
| |
| /** |
| * Container for a task number and an attempt number for the task. |
| */ |
| @Private |
| public class InputAttemptIdentifier { |
| |
| private final InputIdentifier inputIdentifier; |
| private final int attemptNumber; |
| private final String pathComponent; |
| private final boolean shared; |
| |
| public static final String PATH_PREFIX = "attempt"; |
| |
| public InputAttemptIdentifier(int inputIndex, int attemptNumber) { |
| this(new InputIdentifier(inputIndex), attemptNumber, null); |
| } |
| |
| public InputAttemptIdentifier(InputIdentifier inputIdentifier, int attemptNumber, String pathComponent) { |
| this(inputIdentifier, attemptNumber, pathComponent, false); |
| } |
| |
| public InputAttemptIdentifier(InputIdentifier inputIdentifier, int attemptNumber, String pathComponent, boolean shared) { |
| this.inputIdentifier = inputIdentifier; |
| this.attemptNumber = attemptNumber; |
| this.pathComponent = pathComponent; |
| this.shared = shared; |
| if (pathComponent != null && !pathComponent.startsWith(PATH_PREFIX)) { |
| throw new TezUncheckedException( |
| "Path component must start with: " + PATH_PREFIX + " " + this); |
| } |
| } |
| |
| public InputAttemptIdentifier(int taskIndex, int attemptNumber, String pathComponent) { |
| this(new InputIdentifier(taskIndex), attemptNumber, pathComponent); |
| } |
| |
| public InputAttemptIdentifier(int taskIndex, int attemptNumber, String pathComponent, boolean shared) { |
| this(new InputIdentifier(taskIndex), attemptNumber, pathComponent, shared); |
| } |
| |
| public InputIdentifier getInputIdentifier() { |
| return this.inputIdentifier; |
| } |
| |
| public int getAttemptNumber() { |
| return attemptNumber; |
| } |
| |
| public String getPathComponent() { |
| return pathComponent; |
| } |
| |
| public boolean isShared() { |
| return this.shared; |
| } |
| |
| // PathComponent & shared does not need to be part of the hashCode and equals computation. |
| @Override |
| public int hashCode() { |
| final int prime = 31; |
| int result = 1; |
| result = prime * result + attemptNumber; |
| result = prime * result |
| + ((inputIdentifier == null) ? 0 : inputIdentifier.hashCode()); |
| return result; |
| } |
| |
| @Override |
| public boolean equals(Object obj) { |
| if (this == obj) |
| return true; |
| if (obj == null) |
| return false; |
| if (getClass() != obj.getClass()) |
| return false; |
| InputAttemptIdentifier other = (InputAttemptIdentifier) obj; |
| if (attemptNumber != other.attemptNumber) |
| return false; |
| if (inputIdentifier == null) { |
| if (other.inputIdentifier != null) |
| return false; |
| } else if (!inputIdentifier.equals(other.inputIdentifier)) |
| return false; |
| // do not compare pathComponent as they may not always be present |
| return true; |
| } |
| |
| @Override |
| public String toString() { |
| return "InputAttemptIdentifier [inputIdentifier=" + inputIdentifier |
| + ", attemptNumber=" + attemptNumber + ", pathComponent=" |
| + pathComponent + "]"; |
| } |
| } |