org.apache.nemo.runtime.master.eventhandler.UpdatePhysicalPlanEventHandler Maven / Gradle / Ivy

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/*
 * 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.nemo.runtime.master.eventhandler;

import org.apache.nemo.common.eventhandler.CompilerEventHandler;
import org.apache.nemo.runtime.common.eventhandler.UpdatePhysicalPlanEvent;
import org.apache.nemo.runtime.common.plan.PhysicalPlan;
import org.apache.nemo.runtime.master.scheduler.Scheduler;

import javax.inject.Inject;

/**
 * Class for handling event to update physical plan to the scheduler.
 */
public final class UpdatePhysicalPlanEventHandler implements CompilerEventHandler {
  private Scheduler scheduler;

  @Inject
  private UpdatePhysicalPlanEventHandler() {
  }

  public void setScheduler(final Scheduler scheduler) {
    this.scheduler = scheduler;
  }

  @Override
  public Class getEventClass() {
    return UpdatePhysicalPlanEvent.class;
  }

  @Override
  public void onNext(final UpdatePhysicalPlanEvent updatePhysicalPlanEvent) {
    final PhysicalPlan newPlan = updatePhysicalPlanEvent.getNewPhysicalPlan();

    this.scheduler.updatePlan(newPlan);
  }
}