org.apache.hadoop.mapreduce.lib.output

类 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>

直接已知子类:

SequenceFileAsBinaryOutputFormat

public class SequenceFileOutputFormat<K,V>
extends FileOutputFormat<K,V>

An OutputFormat that writes SequenceFiles.

嵌套类概要

从类继承的嵌套类/接口 org.apache.hadoop.mapreduce.lib.output.FileOutputFormat

FileOutputFormat.Counter

字段概要

从类继承的字段 org.apache.hadoop.mapreduce.lib.output.FileOutputFormat

BASE_OUTPUT_NAME, PART

构造器概要

构造器

构造器和说明
SequenceFileOutputFormat()

方法概要

方法

限定符和类型	方法和说明
static 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.
static void	setOutputCompressionType(Job job, SequenceFile.CompressionType style) Set the SequenceFile.CompressionType for the output SequenceFile.

从类继承的方法 org.apache.hadoop.mapreduce.lib.output.FileOutputFormat

checkOutputSpecs, getCompressOutput, getDefaultWorkFile, getOutputCommitter, getOutputCompressorClass, getOutputName, getOutputPath, getPathForWorkFile, getUniqueFile, getWorkOutputPath, setCompressOutput, setOutputCompressorClass, setOutputName, setOutputPath

从类继承的方法 java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

构造器详细资料

SequenceFileOutputFormat

public SequenceFileOutputFormat()

方法详细资料

getRecordWriter

public RecordWriter<K,V> getRecordWriter(TaskAttemptContext context)
                                  throws IOException,
                                         InterruptedException

从类复制的说明: OutputFormat

Get the RecordWriter for the given task.

指定者:

getRecordWriter 在类中 FileOutputFormat<K,V>

参数:

context - the information about the current task.

返回:

a RecordWriter to write the output for the job.

抛出:

IOException

InterruptedException

getOutputCompressionType

public static SequenceFile.CompressionType getOutputCompressionType(JobContext job)

Get the SequenceFile.CompressionType for the output SequenceFile.

参数:

job - the Job

返回:

the SequenceFile.CompressionType for the output SequenceFile, defaulting to SequenceFile.CompressionType.RECORD

setOutputCompressionType

public static void setOutputCompressionType(Job job,
                            SequenceFile.CompressionType style)

Set the SequenceFile.CompressionType for the output SequenceFile.

参数:

job - the Job to modify

style - the SequenceFile.CompressionType for the output SequenceFile