001/* 002 * Copyright (c) 2016-2017 Chris K Wensel <chris@wensel.net>. All Rights Reserved. 003 * Copyright (c) 2007-2017 Xplenty, Inc. All Rights Reserved. 004 * 005 * Project and contact information: http://www.cascading.org/ 006 * 007 * This file is part of the Cascading project. 008 * 009 * Licensed under the Apache License, Version 2.0 (the "License"); 010 * you may not use this file except in compliance with the License. 011 * You may obtain a copy of the License at 012 * 013 * http://www.apache.org/licenses/LICENSE-2.0 014 * 015 * Unless required by applicable law or agreed to in writing, software 016 * distributed under the License is distributed on an "AS IS" BASIS, 017 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 018 * See the License for the specific language governing permissions and 019 * limitations under the License. 020 */ 021 022package cascading.flow.tez.planner.rule.assertion; 023 024import cascading.flow.hadoop.planner.rule.expression.DualStreamedAccumulatedExpression; 025import cascading.flow.planner.rule.RuleAssert; 026 027import static cascading.flow.planner.rule.PlanPhase.PostNodes; 028 029/** 030 * Throws a planner failure if a Tap, both accumulating and streamed, flows into a single merge within a given 031 * pipeline. 032 * <p> 033 * The optimization is to remove the streamed edge between tap and merge, but GraphFinder needs to support marking 034 * edges. 035 */ 036public class DualStreamedAccumulatedMergeNodeAssert extends RuleAssert 037 { 038 public DualStreamedAccumulatedMergeNodeAssert() 039 { 040 super( 041 PostNodes, 042 new DualStreamedAccumulatedExpression(), 043 "may not merge accumulated and streamed in same pipeline: {Secondary}" 044 ); 045 } 046 }