lang/java/reef-runtime-yarn/src/main/test/java/org/apache/reef/runtime/yarn/driver/YarnResourceRequestHandlerTest.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.runtime.yarn.driver;

import org.apache.reef.driver.catalog.ResourceCatalog;
import org.apache.reef.driver.evaluator.EvaluatorRequest;
import org.apache.reef.driver.evaluator.EvaluatorRequestor;
import org.apache.reef.runtime.common.driver.EvaluatorRequestorImpl;
import org.apache.hadoop.yarn.client.api.AMRMClient;
import org.junit.Assert;
import org.junit.Test;
import org.mockito.Mockito;

/**
 * Tests for YarnResourceRequestHandler.
 */
public final class YarnResourceRequestHandlerTest {
  private final ApplicationMasterRegistration applicationMasterRegistration = new ApplicationMasterRegistration();
  private final MockContainerRequestHandler containerRequestHandler = new MockContainerRequestHandler();
  private final YarnResourceRequestHandler resourceRequestHandler = new YarnResourceRequestHandler(containerRequestHandler, applicationMasterRegistration);
  private final ResourceCatalog resourceCatalog = Mockito.mock(ResourceCatalog.class);
  private final EvaluatorRequestor evaluatorRequestor = new EvaluatorRequestorImpl(resourceCatalog, resourceRequestHandler);

  private class MockContainerRequestHandler implements YarnContainerRequestHandler {
    private AMRMClient.ContainerRequest[] requests;

    @Override
    public void onContainerRequest(AMRMClient.ContainerRequest... containerRequests) {
      this.requests = containerRequests;
    }

    public AMRMClient.ContainerRequest[] getRequests() {
      return requests;
    }
  }

  /**
   * Tests whether the amount of memory is transferred correctly.
   */
  @Test
  public void testDifferentMemory() {
    final EvaluatorRequest requestOne = EvaluatorRequest.newBuilder()
        .setNumber(1)
        .setMemory(64)
        .setNumberOfCores(1)
        .build();
    final EvaluatorRequest requestTwo = EvaluatorRequest.newBuilder()
        .setNumber(1)
        .setMemory(128)
        .setNumberOfCores(2)
        .build();
    {
      evaluatorRequestor.submit(requestOne);
      Assert.assertEquals("Request in REEF and YARN form should have the same amount of memory",
          requestOne.getMegaBytes(),
          containerRequestHandler.getRequests()[0].getCapability().getMemory()
      );
    }
    {
      evaluatorRequestor.submit(requestTwo);
      Assert.assertEquals("Request in REEF and YARN form should have the same amount of memory",
          requestTwo.getMegaBytes(),
          containerRequestHandler.getRequests()[0].getCapability().getMemory()
      );
    }
    {
      evaluatorRequestor.submit(requestOne);
      Assert.assertNotEquals("Request in REEF and YARN form should have the same amount of memory",
          requestTwo.getMegaBytes(),
          containerRequestHandler.getRequests()[0].getCapability().getMemory()
      );
    }
  }

  @Test
  public void testEvaluatorCount() {
    final EvaluatorRequest requestOne = EvaluatorRequest.newBuilder()
        .setNumber(1)
        .setMemory(64)
        .setNumberOfCores(1)
        .build();
    final EvaluatorRequest requestTwo = EvaluatorRequest.newBuilder()
        .setNumber(2)
        .setMemory(128)
        .setNumberOfCores(2)
        .build();
    {
      evaluatorRequestor.submit(requestOne);
      Assert.assertEquals("Request in REEF and YARN form should have the same number of Evaluators",
          requestOne.getNumber(),
          containerRequestHandler.getRequests().length
      );
    }
        {
      evaluatorRequestor.submit(requestTwo);
      Assert.assertEquals("Request in REEF and YARN form should have the same number of Evaluators",
          requestTwo.getNumber(),
          containerRequestHandler.getRequests().length
      );
    }
    {
      evaluatorRequestor.submit(requestTwo);
      Assert.assertNotEquals("Request in REEF and YARN form should have the same number of Evaluators",
          requestOne.getNumber(),
          containerRequestHandler.getRequests().length
      );
    }
  }


}