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java.lang.Objectorg.apache.hadoop.mapreduce.OutputFormat<K,V>
org.apache.hadoop.mapreduce.lib.output.NullOutputFormat<K,V>
public class NullOutputFormat<K,V>
Consume all outputs and put them in /dev/null.
| Constructor Summary | |
|---|---|
NullOutputFormat()
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| Method Summary | |
|---|---|
void |
checkOutputSpecs(JobContext context)
Check for validity of the output-specification for the job. |
OutputCommitter |
getOutputCommitter(TaskAttemptContext context)
Get the output committer for this output format. |
RecordWriter<K,V> |
getRecordWriter(TaskAttemptContext context)
Get the RecordWriter for the given task. |
| Methods inherited from class java.lang.Object |
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clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
| Constructor Detail |
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public NullOutputFormat()
| Method Detail |
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public RecordWriter<K,V> getRecordWriter(TaskAttemptContext context)
OutputFormatRecordWriter for the given task.
getRecordWriter in class OutputFormat<K,V>context - the information about the current task.
RecordWriter to write the output for the job.public void checkOutputSpecs(JobContext context)
OutputFormatThis 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 in class OutputFormat<K,V>context - information about the jobpublic OutputCommitter getOutputCommitter(TaskAttemptContext context)
OutputFormat
getOutputCommitter in class OutputFormat<K,V>context - the task context
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