org.apache.hadoop.mapreduce.lib.output
Class SequenceFileOutputFormat<K,V>

java.lang.Object
  extended by org.apache.hadoop.mapreduce.OutputFormat<K,V>
      extended by org.apache.hadoop.mapreduce.lib.output.FileOutputFormat<K,V>
          extended by 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 SequenceFiles.


Field Summary
 
Fields inherited from class org.apache.hadoop.mapreduce.lib.output.FileOutputFormat
BASE_OUTPUT_NAME, COMPRESS, COMPRESS_CODEC, COMPRESS_TYPE, OUTDIR, PART
 
Constructor Summary
SequenceFileOutputFormat()
           
 
Method Summary
static org.apache.hadoop.io.SequenceFile.CompressionType getOutputCompressionType(JobContext job)
          Get the SequenceFile.CompressionType for the output SequenceFile.
 RecordWriter<K,V> getRecordWriter(TaskAttemptContext context)
          Get the RecordWriter for the given task.
protected  org.apache.hadoop.io.SequenceFile.Writer getSequenceWriter(TaskAttemptContext context, Class<?> keyClass, Class<?> valueClass)
           
static void setOutputCompressionType(Job job, org.apache.hadoop.io.SequenceFile.CompressionType style)
          Set the SequenceFile.CompressionType for the output SequenceFile.
 
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
 

Constructor Detail

SequenceFileOutputFormat

public SequenceFileOutputFormat()
Method Detail

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 modify
style - the SequenceFile.CompressionType for the output SequenceFile


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