| /* |
| * 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.pig.backend.hadoop.executionengine.spark.optimizer; |
| |
| import org.apache.pig.backend.hadoop.executionengine.physicalLayer.PhysicalOperator; |
| import org.apache.pig.backend.hadoop.executionengine.physicalLayer.plans.PhysicalPlan; |
| import org.apache.pig.backend.hadoop.executionengine.physicalLayer.relationalOperators.POGlobalRearrange; |
| import org.apache.pig.backend.hadoop.executionengine.physicalLayer.util.PlanHelper; |
| import org.apache.pig.backend.hadoop.executionengine.spark.plan.SparkOpPlanVisitor; |
| import org.apache.pig.backend.hadoop.executionengine.spark.plan.SparkOperPlan; |
| import org.apache.pig.backend.hadoop.executionengine.spark.plan.SparkOperator; |
| import org.apache.pig.backend.hadoop.executionengine.util.AccumulatorOptimizerUtil; |
| import org.apache.pig.impl.plan.DepthFirstWalker; |
| import org.apache.pig.impl.plan.VisitorException; |
| |
| import java.util.List; |
| |
| /** |
| * A visitor to optimize plans that determines if a vertex plan can run in |
| * accumulative mode. |
| */ |
| public class AccumulatorOptimizer extends SparkOpPlanVisitor { |
| |
| public AccumulatorOptimizer(SparkOperPlan plan) { |
| super(plan, new DepthFirstWalker<SparkOperator, SparkOperPlan>(plan)); |
| } |
| |
| @Override |
| public void visitSparkOp(SparkOperator sparkOperator) throws |
| VisitorException { |
| PhysicalPlan plan = sparkOperator.physicalPlan; |
| List<PhysicalOperator> pos = plan.getRoots(); |
| if (pos == null || pos.size() == 0) { |
| return; |
| } |
| |
| List<POGlobalRearrange> glrs = PlanHelper.getPhysicalOperators(plan, |
| POGlobalRearrange.class); |
| |
| for (POGlobalRearrange glr : glrs) { |
| List<PhysicalOperator> successors = plan.getSuccessors(glr); |
| AccumulatorOptimizerUtil.addAccumulator(plan, successors); |
| } |
| } |
| } |