runtime/common/src/main/java/org/apache/nemo/runtime/common/optimizer/RunTimeOptimizer.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.nemo.runtime.common.optimizer;

import org.apache.nemo.common.Pair;
import org.apache.nemo.runtime.common.optimizer.pass.runtime.DataSkewRuntimePass;
import org.apache.nemo.runtime.common.plan.PhysicalPlan;
import org.apache.nemo.runtime.common.plan.StageEdge;

import java.util.*;

/**
 * Runtime optimizer class.
 */
public final class RunTimeOptimizer {
  /**
   * Private constructor.
   */
  private RunTimeOptimizer() {
  }

  /**
   * Dynamic optimization method to process the dag with an appropriate pass, decided by the stats.
   *
   * @param originalPlan the original physical execution plan.
   * @param dynOptData   the data metric.
   * @param targetEdges  the target edges.
   * @return the newly updated optimized physical plan.
   */
  public static synchronized PhysicalPlan dynamicOptimization(
          final PhysicalPlan originalPlan,
          final Object dynOptData,
          final Set<StageEdge> targetEdges) {
    // Data for dynamic optimization used in DataSkewRuntimePass
    // is a map of <hash value, partition size>.
    final PhysicalPlan physicalPlan =
      new DataSkewRuntimePass()
        .apply(originalPlan, Pair.of(targetEdges, (Map<Object, Long>) dynOptData));
    return physicalPlan;
  }
}