Source code

001/*
002 * Licensed to the Apache Software Foundation (ASF) under one
003 * or more contributor license agreements.  See the NOTICE file
004 * distributed with this work for additional information
005 * regarding copyright ownership.  The ASF licenses this file
006 * to you under the Apache License, Version 2.0 (the
007 * "License"); you may not use this file except in compliance
008 * with the License.  You may obtain a copy of the License at
009 *
010 *   http://www.apache.org/licenses/LICENSE-2.0
011 *
012 * Unless required by applicable law or agreed to in writing,
013 * software distributed under the License is distributed on an
014 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
015 * KIND, either express or implied.  See the License for the
016 * specific language governing permissions and limitations
017 * under the License.
018 */
019
020package org.apache.reef.runtime.common.driver.evaluator.pojos;
021
022import org.apache.reef.annotations.audience.DriverSide;
023import org.apache.reef.annotations.audience.Private;
024import org.apache.reef.proto.ReefServiceProtos;
025
026/**
027 * DriverSide representation of EvaluatorStatusProto.
028 */
029@DriverSide
030@Private
031public final class EvaluatorStatusPOJO {
032
033  private final String evaluatorID;
034  private final byte[] evaluatorIdBytes;
035  private final State evaluatorState;
036  private final byte[] errorBytes;
037
038  public EvaluatorStatusPOJO(final ReefServiceProtos.EvaluatorStatusProto proto) {
039    this.evaluatorID = proto.getEvaluatorId();
040    this.evaluatorIdBytes = proto.getEvaluatorIdBytes().toByteArray();
041    this.evaluatorState = proto.hasState() ? State.fromProto(proto.getState()) : null;
042    this.errorBytes = proto.hasError() ? proto.getError().toByteArray() : null;
043  }
044
045  /**
046   * @return true, if an evaluator has thrown an exception and sent it to a driver.
047   */
048  public boolean hasError() {
049    return null != this.errorBytes;
050  }
051
052  /**
053   * @return serialized exception thrown by an evaluator.
054   */
055  public byte[] getError() {
056    return this.errorBytes;
057  }
058
059  /**
060   * @return current state of a task.
061   */
062  public State getState() {
063    return this.evaluatorState;
064  }
065}