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.expression; 022 023import cascading.flow.planner.iso.expression.ElementCapture; 024import cascading.flow.planner.iso.expression.ExpressionGraph; 025import cascading.flow.planner.iso.expression.FlowElementExpression; 026import cascading.flow.planner.iso.expression.PathScopeExpression; 027import cascading.flow.planner.iso.expression.TypeExpression; 028import cascading.flow.planner.rule.RuleExpression; 029import cascading.pipe.Boundary; 030import cascading.pipe.HashJoin; 031import cascading.pipe.Pipe; 032 033import static cascading.flow.planner.iso.expression.AndElementExpression.and; 034import static cascading.flow.planner.iso.expression.NotElementExpression.not; 035 036/** 037 * 038 */ 039public class BalanceSplitSplitToStreamedHashJoinExpression extends RuleExpression 040 { 041 private static final FlowElementExpression SHARED_SPLIT = new FlowElementExpression( Pipe.class, TypeExpression.Topo.Split ); 042 public static final FlowElementExpression SHARED_HASHJOIN = new FlowElementExpression( HashJoin.class ); 043 044 public BalanceSplitSplitToStreamedHashJoinExpression() 045 { 046 super( 047 new ExpressionGraph( 048 and( 049 ElementCapture.Primary, 050 not( and( new FlowElementExpression( Pipe.class, TypeExpression.Topo.Split ), not( new FlowElementExpression( Boundary.class ) ) ) ), 051 not( new FlowElementExpression( HashJoin.class ) ) ) ), 052 053 new ExpressionGraph() 054 .arcs( SHARED_SPLIT, SHARED_HASHJOIN ) 055 .arcs( SHARED_SPLIT, new FlowElementExpression( Pipe.class, TypeExpression.Topo.Split ), SHARED_HASHJOIN ), 056 057 new ExpressionGraph() 058 .arc( 059 and( ElementCapture.Secondary, new FlowElementExpression( Pipe.class ), not( new FlowElementExpression( Boundary.class ) ) ), 060 PathScopeExpression.NON_BLOCKING, 061 new FlowElementExpression( ElementCapture.Primary, HashJoin.class ) 062 ) 063 ); 064 } 065 }