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.tests.rack.awareness;
020
021import org.apache.reef.driver.evaluator.EvaluatorRequest;
022import org.apache.reef.driver.evaluator.EvaluatorRequestor;
023import org.apache.reef.tang.annotations.Parameter;
024import org.apache.reef.wake.EventHandler;
025import org.apache.reef.wake.time.event.StartTime;
026
027import javax.inject.Inject;
028
029/**
030 * A Driver start handler that requests a single Evaluator of size 64MB in the
031 * specified rack.
032 */
033public final class OnDriverStartedAllocateOneInRack implements EventHandler<StartTime> {
034
035  private final EvaluatorRequestor requestor;
036  private final String rackName;
037
038  @Inject
039  OnDriverStartedAllocateOneInRack(
040      final EvaluatorRequestor requestor,
041      @Parameter(RackNameParameter.class) final String rackName) {
042    this.requestor = requestor;
043    this.rackName = rackName;
044  }
045
046  @Override
047  public void onNext(final StartTime startTime) {
048    this.requestor.submit(EvaluatorRequest.newBuilder().setMemory(64).setNumber(1).setNumberOfCores(1)
049        .addRackName(rackName).build());
050  }
051}