org.apache.hadoop.mapreduce.lib.output
Class SequenceFileOutputFormat<K,V>
java.lang.Object
org.apache.hadoop.mapreduce.OutputFormat<K,V>
org.apache.hadoop.mapreduce.lib.output.FileOutputFormat<K,V>
org.apache.hadoop.mapreduce.lib.output.SequenceFileOutputFormat<K,V>
- Direct Known Subclasses:
- SequenceFileAsBinaryOutputFormat
@InterfaceAudience.Public
@InterfaceStability.Stable
public class SequenceFileOutputFormat<K,V>
- extends FileOutputFormat<K,V>
An OutputFormat
that writes SequenceFile
s.
Methods inherited from class org.apache.hadoop.mapreduce.lib.output.FileOutputFormat |
checkOutputSpecs, getCompressOutput, getDefaultWorkFile, getOutputCommitter, getOutputCompressorClass, getOutputName, getOutputPath, getPathForWorkFile, getUniqueFile, getWorkOutputPath, setCompressOutput, setOutputCompressorClass, setOutputName, setOutputPath |
Methods inherited from class java.lang.Object |
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
SequenceFileOutputFormat
public SequenceFileOutputFormat()
getSequenceWriter
protected org.apache.hadoop.io.SequenceFile.Writer getSequenceWriter(TaskAttemptContext context,
Class<?> keyClass,
Class<?> valueClass)
throws IOException
- Throws:
IOException
getRecordWriter
public RecordWriter<K,V> getRecordWriter(TaskAttemptContext context)
throws IOException,
InterruptedException
- Description copied from class:
OutputFormat
- Get the
RecordWriter
for the given task.
- Specified by:
getRecordWriter
in class FileOutputFormat<K,V>
- Parameters:
context
- the information about the current task.
- Returns:
- a
RecordWriter
to write the output for the job.
- Throws:
IOException
InterruptedException
getOutputCompressionType
public static org.apache.hadoop.io.SequenceFile.CompressionType getOutputCompressionType(JobContext job)
- Get the
SequenceFile.CompressionType
for the output SequenceFile
.
- Parameters:
job
- the Job
- Returns:
- the
SequenceFile.CompressionType
for the output SequenceFile
,
defaulting to SequenceFile.CompressionType.RECORD
setOutputCompressionType
public static void setOutputCompressionType(Job job,
org.apache.hadoop.io.SequenceFile.CompressionType style)
- Set the
SequenceFile.CompressionType
for the output SequenceFile
.
- Parameters:
job
- the Job
to modifystyle
- the SequenceFile.CompressionType
for the output
SequenceFile
Copyright © 2014 Apache Software Foundation. All Rights Reserved.