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Diffstat (limited to 'core/src/main/scala/org/apache/hadoop/mapreduce/SparkHadoopMapReduceUtil.scala')
-rw-r--r-- | core/src/main/scala/org/apache/hadoop/mapreduce/SparkHadoopMapReduceUtil.scala | 51 |
1 files changed, 51 insertions, 0 deletions
diff --git a/core/src/main/scala/org/apache/hadoop/mapreduce/SparkHadoopMapReduceUtil.scala b/core/src/main/scala/org/apache/hadoop/mapreduce/SparkHadoopMapReduceUtil.scala new file mode 100644 index 0000000000..bea6253677 --- /dev/null +++ b/core/src/main/scala/org/apache/hadoop/mapreduce/SparkHadoopMapReduceUtil.scala @@ -0,0 +1,51 @@ +/* + * Licensed to the Apache Software Foundation (ASF) under one or more + * contributor license agreements. See the NOTICE file distributed with + * this work for additional information regarding copyright ownership. + * The ASF licenses this file to You under the Apache License, Version 2.0 + * (the "License"); you may not use this file except in compliance with + * the License. You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ + +package org.apache.hadoop.mapreduce + +import org.apache.hadoop.conf.Configuration + +trait SparkHadoopMapReduceUtil { + def newJobContext(conf: Configuration, jobId: JobID): JobContext = { + val klass = firstAvailableClass( + "org.apache.hadoop.mapreduce.task.JobContextImpl", // hadoop2, hadoop2-yarn + "org.apache.hadoop.mapreduce.JobContext") // hadoop1 + val ctor = klass.getDeclaredConstructor(classOf[Configuration], classOf[JobID]) + ctor.newInstance(conf, jobId).asInstanceOf[JobContext] + } + + def newTaskAttemptContext(conf: Configuration, attemptId: TaskAttemptID): TaskAttemptContext = { + val klass = firstAvailableClass( + "org.apache.hadoop.mapreduce.task.TaskAttemptContextImpl", // hadoop2, hadoop2-yarn + "org.apache.hadoop.mapreduce.TaskAttemptContext") // hadoop1 + val ctor = klass.getDeclaredConstructor(classOf[Configuration], classOf[TaskAttemptID]) + ctor.newInstance(conf, attemptId).asInstanceOf[TaskAttemptContext] + } + + def newTaskAttemptID(jtIdentifier: String, jobId: Int, isMap: Boolean, taskId: Int, attemptId: Int) = { + new TaskAttemptID(jtIdentifier, jobId, isMap, taskId, attemptId) + } + + private def firstAvailableClass(first: String, second: String): Class[_] = { + try { + Class.forName(first) + } catch { + case e: ClassNotFoundException => + Class.forName(second) + } + } +} |