001/* 002 * Copyright (c) 2007-2015 Concurrent, 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.hadoop.planner.rule.assertion; 022 023import cascading.flow.hadoop.planner.rule.expression.DualStreamedAccumulatedExpression; 024import cascading.flow.planner.rule.RuleAssert; 025 026import static cascading.flow.planner.rule.PlanPhase.PostPipelines; 027 028/** 029 * Throws a planner failure if a Tap, both accumulating and streamed, flows into a single merge within a given 030 * pipeline. 031 * <p/> 032 * The optimization is to remove the streamed edge between tap and merge, but GraphFinder needs to support marking 033 * edges. 034 */ 035public class DualStreamedAccumulatedMergePipelineAssert extends RuleAssert 036 { 037 public DualStreamedAccumulatedMergePipelineAssert() 038 { 039 super( 040 PostPipelines, 041 new DualStreamedAccumulatedExpression(), 042 "may not merge accumulated and streamed in same pipeline: {Secondary}" 043 ); 044 } 045 }