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 */
019package org.apache.reef.runtime.common.driver.resourcemanager;
020
021import org.apache.reef.annotations.audience.Private;
022import org.apache.reef.driver.restart.DriverRestartManager;
023import org.apache.reef.runtime.common.driver.evaluator.EvaluatorManager;
024import org.apache.reef.runtime.common.driver.evaluator.EvaluatorManagerFactory;
025import org.apache.reef.runtime.common.driver.evaluator.Evaluators;
026import org.apache.reef.tang.InjectionFuture;
027import org.apache.reef.util.Optional;
028import org.apache.reef.wake.EventHandler;
029
030import javax.inject.Inject;
031
032/**
033 * A ResourceStatusProto message comes from the ResourceManager layer to indicate what it thinks
034 * about the current state of a given resource. Ideally, we should think the same thing.
035 */
036@Private
037public final class ResourceStatusHandler implements EventHandler<ResourceStatusEvent> {
038
039  private final Evaluators evaluators;
040  private final EvaluatorManagerFactory evaluatorManagerFactory;
041  private final InjectionFuture<DriverRestartManager> driverRestartManager;
042
043  @Inject
044  ResourceStatusHandler(final Evaluators evaluators,
045                        final EvaluatorManagerFactory evaluatorManagerFactory,
046                        final InjectionFuture<DriverRestartManager> driverRestartManager) {
047    this.evaluators = evaluators;
048    this.evaluatorManagerFactory = evaluatorManagerFactory;
049    this.driverRestartManager = driverRestartManager;
050  }
051
052  /**
053   * This resource status message comes from the ResourceManager layer; telling me what it thinks.
054   * about the state of the resource executing an Evaluator; This method simply passes the message
055   * off to the referenced EvaluatorManager
056   *
057   * @param resourceStatusEvent resource status message from the ResourceManager
058   */
059  @Override
060  public void onNext(final ResourceStatusEvent resourceStatusEvent) {
061    final Optional<EvaluatorManager> evaluatorManager = this.evaluators.get(resourceStatusEvent.getIdentifier());
062    if (evaluatorManager.isPresent()) {
063      evaluatorManager.get().onResourceStatusMessage(resourceStatusEvent);
064    } else {
065      if (driverRestartManager.get().getEvaluatorRestartState(resourceStatusEvent.getIdentifier())
066            .isFailedOrExpired()) {
067        final EvaluatorManager previousEvaluatorManager = this.evaluatorManagerFactory
068            .getNewEvaluatorManagerForEvaluatorFailedDuringDriverRestart(resourceStatusEvent);
069
070        previousEvaluatorManager.onResourceStatusMessage(resourceStatusEvent);
071      } else {
072        throw new RuntimeException(
073            "Unknown resource status from evaluator " + resourceStatusEvent.getIdentifier() +
074                " with state " + resourceStatusEvent.getState()
075        );
076      }
077    }
078  }
079}