diff options
Diffstat (limited to 'sql/hive/src/main/scala/org/apache/hadoop/mapred')
-rw-r--r-- | sql/hive/src/main/scala/org/apache/hadoop/mapred/SparkHadoopWriter.scala | 198 |
1 files changed, 198 insertions, 0 deletions
diff --git a/sql/hive/src/main/scala/org/apache/hadoop/mapred/SparkHadoopWriter.scala b/sql/hive/src/main/scala/org/apache/hadoop/mapred/SparkHadoopWriter.scala new file mode 100644 index 0000000000..08d390e887 --- /dev/null +++ b/sql/hive/src/main/scala/org/apache/hadoop/mapred/SparkHadoopWriter.scala @@ -0,0 +1,198 @@ +/* + * 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.mapred + +import java.io.IOException +import java.text.NumberFormat +import java.util.Date + +import org.apache.hadoop.fs.Path +import org.apache.hadoop.io.Writable + +import org.apache.spark.Logging +import org.apache.spark.SerializableWritable + +import org.apache.hadoop.hive.ql.exec.{Utilities, FileSinkOperator} +import org.apache.hadoop.hive.ql.io.{HiveFileFormatUtils, HiveOutputFormat} +import org.apache.hadoop.hive.ql.plan.FileSinkDesc + +/** + * Internal helper class that saves an RDD using a Hive OutputFormat. + * It is based on [[SparkHadoopWriter]]. + */ +protected[apache] +class SparkHiveHadoopWriter( + @transient jobConf: JobConf, + fileSinkConf: FileSinkDesc) + extends Logging + with SparkHadoopMapRedUtil + with Serializable { + + private val now = new Date() + private val conf = new SerializableWritable(jobConf) + + private var jobID = 0 + private var splitID = 0 + private var attemptID = 0 + private var jID: SerializableWritable[JobID] = null + private var taID: SerializableWritable[TaskAttemptID] = null + + @transient private var writer: FileSinkOperator.RecordWriter = null + @transient private var format: HiveOutputFormat[AnyRef, Writable] = null + @transient private var committer: OutputCommitter = null + @transient private var jobContext: JobContext = null + @transient private var taskContext: TaskAttemptContext = null + + def preSetup() { + setIDs(0, 0, 0) + setConfParams() + + val jCtxt = getJobContext() + getOutputCommitter().setupJob(jCtxt) + } + + + def setup(jobid: Int, splitid: Int, attemptid: Int) { + setIDs(jobid, splitid, attemptid) + setConfParams() + } + + def open() { + val numfmt = NumberFormat.getInstance() + numfmt.setMinimumIntegerDigits(5) + numfmt.setGroupingUsed(false) + + val extension = Utilities.getFileExtension( + conf.value, + fileSinkConf.getCompressed, + getOutputFormat()) + + val outputName = "part-" + numfmt.format(splitID) + extension + val path = FileOutputFormat.getTaskOutputPath(conf.value, outputName) + + getOutputCommitter().setupTask(getTaskContext()) + writer = HiveFileFormatUtils.getHiveRecordWriter( + conf.value, + fileSinkConf.getTableInfo, + conf.value.getOutputValueClass.asInstanceOf[Class[Writable]], + fileSinkConf, + path, + null) + } + + def write(value: Writable) { + if (writer != null) { + writer.write(value) + } else { + throw new IOException("Writer is null, open() has not been called") + } + } + + def close() { + // Seems the boolean value passed into close does not matter. + writer.close(false) + } + + def commit() { + val taCtxt = getTaskContext() + val cmtr = getOutputCommitter() + if (cmtr.needsTaskCommit(taCtxt)) { + try { + cmtr.commitTask(taCtxt) + logInfo (taID + ": Committed") + } catch { + case e: IOException => { + logError("Error committing the output of task: " + taID.value, e) + cmtr.abortTask(taCtxt) + throw e + } + } + } else { + logWarning ("No need to commit output of task: " + taID.value) + } + } + + def commitJob() { + // always ? Or if cmtr.needsTaskCommit ? + val cmtr = getOutputCommitter() + cmtr.commitJob(getJobContext()) + } + + // ********* Private Functions ********* + + private def getOutputFormat(): HiveOutputFormat[AnyRef,Writable] = { + if (format == null) { + format = conf.value.getOutputFormat() + .asInstanceOf[HiveOutputFormat[AnyRef,Writable]] + } + format + } + + private def getOutputCommitter(): OutputCommitter = { + if (committer == null) { + committer = conf.value.getOutputCommitter + } + committer + } + + private def getJobContext(): JobContext = { + if (jobContext == null) { + jobContext = newJobContext(conf.value, jID.value) + } + jobContext + } + + private def getTaskContext(): TaskAttemptContext = { + if (taskContext == null) { + taskContext = newTaskAttemptContext(conf.value, taID.value) + } + taskContext + } + + private def setIDs(jobid: Int, splitid: Int, attemptid: Int) { + jobID = jobid + splitID = splitid + attemptID = attemptid + + jID = new SerializableWritable[JobID](SparkHadoopWriter.createJobID(now, jobid)) + taID = new SerializableWritable[TaskAttemptID]( + new TaskAttemptID(new TaskID(jID.value, true, splitID), attemptID)) + } + + private def setConfParams() { + conf.value.set("mapred.job.id", jID.value.toString) + conf.value.set("mapred.tip.id", taID.value.getTaskID.toString) + conf.value.set("mapred.task.id", taID.value.toString) + conf.value.setBoolean("mapred.task.is.map", true) + conf.value.setInt("mapred.task.partition", splitID) + } +} + +object SparkHiveHadoopWriter { + def createPathFromString(path: String, conf: JobConf): Path = { + if (path == null) { + throw new IllegalArgumentException("Output path is null") + } + val outputPath = new Path(path) + val fs = outputPath.getFileSystem(conf) + if (outputPath == null || fs == null) { + throw new IllegalArgumentException("Incorrectly formatted output path") + } + outputPath.makeQualified(fs) + } +} |