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.hadoop.planner.rule.transformer; 022 023import cascading.flow.hadoop.planner.rule.expression.AccumulatedTapOnHashJoinExpression; 024import cascading.flow.planner.rule.transformer.IntermediateTapElementFactory; 025import cascading.flow.planner.rule.transformer.RuleReplaceFactoryBasedTransformer; 026 027import static cascading.flow.planner.rule.PlanPhase.BalanceAssembly; 028 029/** 030 * The ReplaceAccumulateTapWithDistCacheTransformer will decorate all temp or checkpoint taps on the accumulated side 031 * of a {@link cascading.pipe.HashJoin} with a {@link cascading.tap.hadoop.DistCacheTap} instance that wraps the 032 * original Tap instance. 033 */ 034public class ReplaceAccumulateTapWithDistCacheTransformer extends RuleReplaceFactoryBasedTransformer 035 { 036 public ReplaceAccumulateTapWithDistCacheTransformer() 037 { 038 super( 039 BalanceAssembly, 040 new AccumulatedTapOnHashJoinExpression(), 041 IntermediateTapElementFactory.ACCUMULATED_TAP 042 ); 043 } 044 }