org.apache.accumulo.tserver.log

Class MultiReader

java.lang.Object

org.apache.accumulo.tserver.log.MultiReader

public class MultiReader
extends Object

Provide simple Map.Reader methods over multiple Maps. Presently only supports next() and seek() and works on all the Map directories within a directory. The primary purpose of this class is to merge the results of multiple Reduce jobs that result in Map output files.

Constructor Summary

Constructors

Constructor and Description
MultiReader(VolumeManager fs, org.apache.hadoop.fs.Path directory)

Method Summary

Modifier and Type	Method and Description
void	close()
boolean	next(org.apache.hadoop.io.WritableComparable key, org.apache.hadoop.io.Writable val)
boolean	seek(org.apache.hadoop.io.WritableComparable key)

Methods inherited from class java.lang.Object

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

Constructor Detail

MultiReader

public MultiReader(VolumeManager fs,
                   org.apache.hadoop.fs.Path directory)
            throws IOException

Throws:

IOException

Method Detail

next

public boolean next(org.apache.hadoop.io.WritableComparable key,
                    org.apache.hadoop.io.Writable val)
             throws IOException

Throws:

IOException

seek

public boolean seek(org.apache.hadoop.io.WritableComparable key)
             throws IOException

Throws:

IOException

close

public void close()
           throws IOException

Throws:

IOException