tez-runtime-library/src/main/java/org/apache/tez/runtime/library/common/CompositeInputAttemptIdentifier.java

/**
 * 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;

/**
 * Container for a task number and an attempt number for the task.
 */
@Private
public class CompositeInputAttemptIdentifier extends InputAttemptIdentifier {
  private final int inputIdentifierCount;

  public CompositeInputAttemptIdentifier(int inputIdentifier, int attemptNumber, String pathComponent, int inputIdentifierCount) {
    this(inputIdentifier, attemptNumber, pathComponent, false, SPILL_INFO.FINAL_MERGE_ENABLED, -1, inputIdentifierCount);
  }

  public CompositeInputAttemptIdentifier(int inputIdentifier, int attemptNumber, String pathComponent, boolean isShared, int inputIdentifierCount) {
    this(inputIdentifier, attemptNumber, pathComponent, isShared, SPILL_INFO.FINAL_MERGE_ENABLED, -1, inputIdentifierCount);
  }

  public CompositeInputAttemptIdentifier(int inputIdentifier, int attemptNumber, String pathComponent,
      boolean shared, SPILL_INFO fetchTypeInfo, int spillEventId, int inputIdentifierCount) {
    super(inputIdentifier, attemptNumber, pathComponent, shared, fetchTypeInfo, spillEventId);
    this.inputIdentifierCount = inputIdentifierCount;
  }


  public int getInputIdentifierCount() {
    return inputIdentifierCount;
  }

  public InputAttemptIdentifier expand(int inputIdentifierOffset) {
    return new InputAttemptIdentifier(getInputIdentifier() + inputIdentifierOffset, getAttemptNumber(), getPathComponent(), isShared(), getFetchTypeInfo(), getSpillEventId());
  }

  // PathComponent & shared does not need to be part of the hashCode and equals computation.
  @Override
  public int hashCode() {
    return super.hashCode();
  }

  @Override
  public boolean equals(Object obj) {
    return super.equals(obj);
  }

  @Override
  public String toString() {
    return super.toString();
  }
}