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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.examples.hellomultiruntime;
020
021import org.apache.reef.driver.evaluator.AllocatedEvaluator;
022import org.apache.reef.driver.evaluator.EvaluatorRequestor;
023import org.apache.reef.driver.task.TaskConfiguration;
024import org.apache.reef.examples.hello.HelloTask;
025import org.apache.reef.runtime.local.driver.RuntimeIdentifier;
026import org.apache.reef.tang.Configuration;
027import org.apache.reef.tang.annotations.Unit;
028import org.apache.reef.wake.EventHandler;
029import org.apache.reef.wake.time.event.StartTime;
030
031import javax.inject.Inject;
032import java.util.logging.Level;
033import java.util.logging.Logger;
034
035/**
036 * The Driver code for the Hello REEF Application with Multi Runtime.
037 */
038@Unit
039public final class HelloMultiRuntimeDriver {
040
041  private static final Logger LOG = Logger.getLogger(HelloMultiRuntimeDriver.class.getName());
042
043  private final EvaluatorRequestor requestor;
044
045  /**
046   * Job driver constructor - instantiated via TANG.
047   *
048   * @param requestor evaluator requestor object used to create new evaluator containers.
049   */
050  @Inject
051  private HelloMultiRuntimeDriver(final EvaluatorRequestor requestor) {
052    this.requestor = requestor;
053    LOG.log(Level.FINE, "Instantiated 'HelloDriver'");
054  }
055
056  /**
057   * Handles the StartTime event: Request as single Evaluator.
058   */
059  public final class StartHandler implements EventHandler<StartTime> {
060    @Override
061    public void onNext(final StartTime startTime) {
062      HelloMultiRuntimeDriver.this.requestor.newRequest()
063          .setNumber(1)
064          .setMemory(64)
065          .setNumberOfCores(1)
066          .setRuntimeName(RuntimeIdentifier.RUNTIME_NAME)
067          .submit();
068
069      LOG.log(Level.INFO, "Requested Local Evaluator .");
070
071      HelloMultiRuntimeDriver.this.requestor.newRequest()
072          .setNumber(1)
073          .setMemory(64)
074          .setNumberOfCores(1)
075          .setRuntimeName(RuntimeIdentifier.RUNTIME_NAME)
076          .submit();
077
078      LOG.log(Level.INFO, "Requested Yarn Evaluator.");
079    }
080  }
081
082  /**
083   * Handles AllocatedEvaluator: Submit the HelloTask.
084   */
085  public final class EvaluatorAllocatedHandler implements EventHandler<AllocatedEvaluator> {
086    @Override
087    public void onNext(final AllocatedEvaluator allocatedEvaluator) {
088      LOG.log(Level.INFO, "Submitting HelloREEF task to AllocatedEvaluator: {0}", allocatedEvaluator);
089      final Configuration taskConfiguration = TaskConfiguration.CONF
090          .set(TaskConfiguration.IDENTIFIER, "HelloREEFTask")
091          .set(TaskConfiguration.TASK, HelloTask.class)
092          .build();
093      allocatedEvaluator.submitTask(taskConfiguration);
094    }
095  }
096}