    001/*
    002 * Copyright (c) 2007-2017 Xplenty, Inc. All Rights Reserved.
    003 *
    004 * Project and contact information: http://www.cascading.org/
    005 *
    006 * This file is part of the Cascading project.
    007 *
    008 * Licensed under the Apache License, Version 2.0 (the "License");
    009 * you may not use this file except in compliance with the License.
    010 * You may obtain a copy of the License at
    011 *
    012 *     http://www.apache.org/licenses/LICENSE-2.0
    013 *
    014 * Unless required by applicable law or agreed to in writing, software
    015 * distributed under the License is distributed on an "AS IS" BASIS,
    016 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    017 * See the License for the specific language governing permissions and
    018 * limitations under the License.
    019 */
    020
    021package cascading.flow.tez.planner.rule.partitioner;
    022
    023import cascading.flow.planner.rule.RuleExpression;
    024import cascading.flow.planner.rule.expressiongraph.NoGroupJoinMergeBoundaryTapExpressionGraph;
    025import cascading.flow.planner.rule.partitioner.ExpressionRulePartitioner;
    026import cascading.flow.tez.planner.rule.expressiongraph.ConsecutiveGroupOrMergeExpressionGraph;
    027
    028import static cascading.flow.planner.rule.PlanPhase.PartitionNodes;
    029
    030/**
    031 * Merge -> (Merge or GroupBy)
    032 */
    033public class ConsecutiveGroupOrMergesNodePartitioner extends ExpressionRulePartitioner
    034  {
    035  public ConsecutiveGroupOrMergesNodePartitioner()
    036    {
    037    super(
    038      PartitionNodes,
    039
    040      new RuleExpression(
    041        new NoGroupJoinMergeBoundaryTapExpressionGraph(),
    042        new ConsecutiveGroupOrMergeExpressionGraph()
    043      )
    044    );
    045    }
    046  }