TestShutdownMessageHandlerFactory.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 gobblin.cluster;

import java.util.Collections;
import java.util.List;

import org.apache.helix.NotificationContext;
import org.apache.helix.messaging.handling.HelixTaskResult;
import org.apache.helix.messaging.handling.MessageHandler;
import org.apache.helix.messaging.handling.MessageHandlerFactory;
import org.apache.helix.model.Message;

import org.testng.Assert;


/**
 * A test implementation of {@link MessageHandlerFactory}.
 *
 * @author Yinan Li
 */
public class TestShutdownMessageHandlerFactory implements MessageHandlerFactory {

  private final HelixMessageTestBase helixMessageTestBase;

  public TestShutdownMessageHandlerFactory(HelixMessageTestBase helixMessageTestBase) {
    this.helixMessageTestBase = helixMessageTestBase;
  }

  @Override
  public MessageHandler createHandler(Message message, NotificationContext notificationContext) {
    return new TestShutdownMessageHandler(message, notificationContext, this.helixMessageTestBase);
  }

  @Override
  public String getMessageType() {
    return GobblinHelixConstants.SHUTDOWN_MESSAGE_TYPE;
  }

  public List<String> getMessageTypes() {
    return Collections.singletonList(getMessageType());
  }

  @Override
  public void reset() {

  }

  private static class TestShutdownMessageHandler extends MessageHandler {

    private final HelixMessageTestBase helixMessageTestBase;

    public TestShutdownMessageHandler(Message message, NotificationContext context,
        HelixMessageTestBase helixMessageTestBase) {
      super(message, context);
      this.helixMessageTestBase = helixMessageTestBase;
    }

    @Override
    public HelixTaskResult handleMessage()
        throws InterruptedException {
      // Delay handling the message so the ZooKeeper client sees the message
      Thread.sleep(1000);
      this.helixMessageTestBase.assertMessageReception(_message);
      HelixTaskResult result = new HelixTaskResult();
      result.setSuccess(true);
      return result;
    }

    @Override
    public void onError(Exception e, ErrorCode errorCode, ErrorType errorType) {
      Assert.fail();
    }
  }
}