lang/java/reef-tests/src/test/java/org/apache/reef/tests/close_eval/CloseEvaluatorDriver.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.reef.tests.close_eval;

import org.apache.reef.driver.evaluator.AllocatedEvaluator;
import org.apache.reef.driver.evaluator.EvaluatorRequest;
import org.apache.reef.driver.evaluator.EvaluatorRequestor;
import org.apache.reef.tang.annotations.Unit;
import org.apache.reef.wake.EventHandler;
import org.apache.reef.wake.time.event.StartTime;

import javax.inject.Inject;
import java.util.logging.Level;
import java.util.logging.Logger;

@Unit
final class CloseEvaluatorDriver {

  private static final Logger LOG = Logger.getLogger(CloseEvaluatorDriver.class.getName());

  private static final int NUM_EVALUATORS = 16;

  private final EvaluatorRequestor requestor;

  @Inject
  CloseEvaluatorDriver(final EvaluatorRequestor requestor) {
    this.requestor = requestor;
  }

  final class StartHandler implements EventHandler<StartTime> {
    @Override
    public void onNext(final StartTime time) {

      LOG.log(Level.FINE, "StartTime: {0} :: request {1} evaluators",
          new Object[]{time, NUM_EVALUATORS});

      requestor.submit(EvaluatorRequest.newBuilder()
          .setNumber(NUM_EVALUATORS).setMemory(64).setNumberOfCores(1).build());
    }
  }

  final class EvaluatorAllocatedHandler implements EventHandler<AllocatedEvaluator> {
    @Override
    public void onNext(final AllocatedEvaluator eval) {
      LOG.log(Level.FINE, "Allocated Evaluator: {0} :: closing", eval);
      eval.close();
    }
  }
}