Package org.apache.hadoop.mapreduce

Class RecordWriter<K,V>

java.lang.Object

org.apache.hadoop.mapreduce.RecordWriter<K,V>

@Public
@Stable
public abstract class RecordWriter<K,V>
extends Object

RecordWriter writes the output <key, value> pairs to an output file.

RecordWriter implementations write the job outputs to the FileSystem.

See Also:

• OutputFormat

Constructor Summary

Constructors

Constructor	Description
RecordWriter()

Method Summary

Modifier and Type	Method	Description
abstract void	close(TaskAttemptContext context)	Close this RecordWriter to future operations.
abstract void	write(K key, V value)	Writes a key/value pair.

Methods inherited from class java.lang.Object

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

Constructor Details

RecordWriter

public RecordWriter()

Method Details

write

public abstract void write(K key,
 V value)
                    throws IOException,
InterruptedException

Writes a key/value pair.

Parameters:

key - the key to write.

value - the value to write.

Throws:

IOException

InterruptedException

close

public abstract void close(TaskAttemptContext context)
                    throws IOException,
InterruptedException

Close this RecordWriter to future operations.

Parameters:

context - the context of the task

Throws:

IOException

InterruptedException