@InterfaceAudience.Public @InterfaceStability.Stable public class NullOutputFormat<K,V> extends Object implements OutputFormat<K,V>
コンストラクタと説明 |
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NullOutputFormat() |
修飾子とタイプ | メソッドと説明 |
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void |
checkOutputSpecs(FileSystem ignored,
JobConf job)
Check for validity of the output-specification for the job.
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RecordWriter<K,V> |
getRecordWriter(FileSystem ignored,
JobConf job,
String name,
Progressable progress)
Get the
RecordWriter for the given job. |
public NullOutputFormat()
public RecordWriter<K,V> getRecordWriter(FileSystem ignored, JobConf job, String name, Progressable progress)
OutputFormat
RecordWriter
for the given job.getRecordWriter
インタフェース内 OutputFormat<K,V>
job
- configuration for the job whose output is being written.name
- the unique name for this part of the output.progress
- mechanism for reporting progress while writing to file.RecordWriter
to write the output for the job.public void checkOutputSpecs(FileSystem ignored, JobConf job)
OutputFormat
This is to validate the output specification for the job when it is a job is submitted. Typically checks that it does not already exist, throwing an exception when it already exists, so that output is not overwritten.
checkOutputSpecs
インタフェース内 OutputFormat<K,V>
job
- job configuration.Copyright © 2016 Apache Software Foundation. All rights reserved.