heron/schedulers/src/java/org/apache/heron/scheduler/NullScheduler.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.heron.scheduler;

import java.util.ArrayList;
import java.util.List;

import org.apache.heron.proto.scheduler.Scheduler;
import org.apache.heron.spi.common.Config;
import org.apache.heron.spi.packing.PackingPlan;
import org.apache.heron.spi.scheduler.IScheduler;

public class NullScheduler implements IScheduler {

  @Override
  public void initialize(Config config, Config runtime) {

  }

  @Override
  public void close() {

  }

  @Override
  public boolean onSchedule(PackingPlan packing) {
    return true;
  }

  @Override
  public List<String> getJobLinks() {
    return new ArrayList<>();
  }

  @Override
  public boolean onKill(Scheduler.KillTopologyRequest request) {
    return true;
  }

  @Override
  public boolean onRestart(Scheduler.RestartTopologyRequest request) {
    return true;
  }

  @Override
  public boolean onUpdate(Scheduler.UpdateTopologyRequest request) {
    return false;
  }
}