001 /** 002 * Licensed to the Apache Software Foundation (ASF) under one 003 * or more contributor license agreements. See the NOTICE file 004 * distributed with this work for additional information 005 * regarding copyright ownership. The ASF licenses this file 006 * to you under the Apache License, Version 2.0 (the 007 * "License"); you may not use this file except in compliance 008 * with the License. You may obtain a copy of the License at 009 * 010 * http://www.apache.org/licenses/LICENSE-2.0 011 * 012 * Unless required by applicable law or agreed to in writing, software 013 * distributed under the License is distributed on an "AS IS" BASIS, 014 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 015 * See the License for the specific language governing permissions and 016 * limitations under the License. 017 */ 018 package org.apache.oozie.action.hadoop; 019 020 import org.apache.hadoop.mapred.Counters; 021 import org.apache.oozie.DagELFunctions; 022 import org.apache.oozie.util.ELEvaluationException; 023 import org.apache.oozie.util.XLog; 024 import org.apache.oozie.workflow.WorkflowInstance; 025 import org.json.simple.JSONValue; 026 027 import java.util.HashMap; 028 import java.util.Map; 029 030 /** 031 * Hadoop EL functions. 032 */ 033 public class HadoopELFunctions { 034 035 private static final String HADOOP_COUNTERS = "oozie.el.action.hadoop.counters"; 036 037 public static final String RECORDS = "org.apache.hadoop.mapred.Task$Counter"; 038 public static final String MAP_IN = "MAP_INPUT_RECORDS"; 039 public static final String MAP_OUT = "MAP_OUTPUT_RECORDS"; 040 public static final String REDUCE_IN = "REDUCE_INPUT_RECORDS"; 041 public static final String REDUCE_OUT = "REDUCE_OUTPUT_RECORDS"; 042 public static final String GROUPS = "REDUCE_INPUT_GROUPS"; 043 044 @SuppressWarnings("unchecked") 045 public static Map<String, Map<String, Long>> hadoop_counters(String nodeName) throws ELEvaluationException { 046 WorkflowInstance instance = DagELFunctions.getWorkflow().getWorkflowInstance(); 047 Object obj = instance.getTransientVar(nodeName + WorkflowInstance.NODE_VAR_SEPARATOR + HADOOP_COUNTERS); 048 Map<String, Map<String, Long>> counters = (Map<String, Map<String, Long>>) obj; 049 if (counters == null) { 050 counters = getCounters(nodeName); 051 instance.setTransientVar(nodeName + WorkflowInstance.NODE_VAR_SEPARATOR + HADOOP_COUNTERS, counters); 052 } 053 return counters; 054 } 055 056 @SuppressWarnings("unchecked") 057 private static Map<String, Map<String, Long>> getCounters(String nodeName) throws ELEvaluationException { 058 String jsonCounters = DagELFunctions.getActionVar(nodeName, MapReduceActionExecutor.HADOOP_COUNTERS); 059 if (jsonCounters == null) { 060 throw new IllegalArgumentException(XLog.format("Hadoop counters not available for action [{0}]", nodeName)); 061 } 062 return (Map) JSONValue.parse(jsonCounters); 063 } 064 065 }