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.planner.rule; 022 023/** 024 */ 025public enum ProcessLevel 026 { 027 /** 028 * Applies assertions or transformations to the whole FlowElement assembly. 029 */ 030 Assembly, 031 032 /** 033 * Applies to sub-graphs of a flow where a step is a submitted unit of cluster work. 034 */ 035 Step, 036 037 /** 038 * Applies to generation sub-graphs of steps where is a node is a unit of processing with a step. 039 * <p/> 040 * In MapReduce its a Map or Reduce node (where Map and Reduce are Kinds). 041 * <p/> 042 * In Tez its a Processor. 043 */ 044 Node, 045 046 /** 047 * Applies to sub-graphs within nodes having a single streamed input, and multiple accumulated inputs. 048 * <p/> 049 * In MapReduce, a Mapper task can arbitrarily process a given input file via the MultiInputSplit. 050 * <p/> 051 * Tez currently does not allow multiply physical inputs per processor. 052 */ 053 Pipeline; 054 055 public static ProcessLevel parent( ProcessLevel level ) 056 { 057 if( level == Assembly ) 058 return null; 059 060 return ProcessLevel.values()[ level.ordinal() - 1 ]; 061 } 062 }