Package org.apache.accumulo.tserver.log

Class RecoveryLogReader

java.lang.Object

org.apache.accumulo.tserver.log.RecoveryLogReader

All Implemented Interfaces:

AutoCloseable, Iterator<Map.Entry<LogFileKey,LogFileValue>>, CloseableIterator<Map.Entry<LogFileKey,LogFileValue>>

public class RecoveryLogReader
extends Object
implements CloseableIterator<Map.Entry<LogFileKey,LogFileValue>>

A class which reads sorted recovery logs produced from a single WAL. 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	Description
RecoveryLogReader(VolumeManager fs, org.apache.hadoop.fs.Path directory)
RecoveryLogReader(VolumeManager fs, org.apache.hadoop.fs.Path directory, LogFileKey start, LogFileKey end)

Method Summary

Modifier and Type	Method	Description
void	close()
boolean	hasNext()
Map.Entry<LogFileKey,LogFileValue>	next()
void	remove()

Methods inherited from class java.lang.Object

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

Methods inherited from interface java.util.Iterator

forEachRemaining

Constructor Detail

RecoveryLogReader

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

Throws:

IOException

RecoveryLogReader

public RecoveryLogReader(VolumeManager fs,
                         org.apache.hadoop.fs.Path directory,
                         LogFileKey start,
                         LogFileKey end)
                  throws IOException

Throws:

IOException

Method Detail

close

public void close()
           throws IOException

Specified by:

close in interface AutoCloseable

Specified by:

close in interface CloseableIterator<Map.Entry<LogFileKey,LogFileValue>>

Throws:

IOException

hasNext

public boolean hasNext()

Specified by:

hasNext in interface Iterator<Map.Entry<LogFileKey,LogFileValue>>

next

public Map.Entry<LogFileKey,LogFileValue> next()

Specified by:

next in interface Iterator<Map.Entry<LogFileKey,LogFileValue>>

remove

public void remove()

Specified by:

remove in interface Iterator<Map.Entry<LogFileKey,LogFileValue>>