org.apache.hadoop.hbase.master
Class LogCleaner

java.lang.Object
  java.lang.Thread
      org.apache.hadoop.hbase.Chore
          org.apache.hadoop.hbase.master.LogCleaner

All Implemented Interfaces:

java.lang.Runnable

public class LogCleaner
extends Chore

This Chore, everytime it runs, will clear the wal logs in the old logs folder that are deletable for each log cleaner in the chain, in order to limit the number of deletes it sends, will only delete maximum 20 in a single run.

Nested Class Summary

Nested classes/interfaces inherited from class java.lang.Thread

java.lang.Thread.State, java.lang.Thread.UncaughtExceptionHandler

Field Summary

Fields inherited from class org.apache.hadoop.hbase.Chore

stopper

Fields inherited from class java.lang.Thread

MAX_PRIORITY, MIN_PRIORITY, NORM_PRIORITY

Constructor Summary

LogCleaner(int p, Stoppable s, org.apache.hadoop.conf.Configuration conf, org.apache.hadoop.fs.FileSystem fs, org.apache.hadoop.fs.Path oldLogDir)

Method Summary

void	addLogCleaner(LogCleanerDelegate logCleaner) Add a LogCleanerDelegate to the log cleaner chain.
protected void	chore() Look for chores.
static LogCleanerDelegate	newLogCleaner(java.lang.String className, org.apache.hadoop.conf.Configuration conf) A utility method to create new instances of LogCleanerDelegate based on the class name of the LogCleanerDelegate.
void	run()

Methods inherited from class org.apache.hadoop.hbase.Chore

initialChore, sleep, triggerNow

Methods inherited from class java.lang.Thread

activeCount, checkAccess, clone, countStackFrames, currentThread, destroy, dumpStack, enumerate, getAllStackTraces, getContextClassLoader, getDefaultUncaughtExceptionHandler, getId, getName, getPriority, getStackTrace, getState, getThreadGroup, getUncaughtExceptionHandler, holdsLock, interrupt, interrupted, isAlive, isDaemon, isInterrupted, join, join, join, resume, setContextClassLoader, setDaemon, setDefaultUncaughtExceptionHandler, setName, setPriority, setUncaughtExceptionHandler, sleep, sleep, start, stop, stop, suspend, toString, yield

Methods inherited from class java.lang.Object

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

Constructor Detail

LogCleaner

public LogCleaner(int p,
                  Stoppable s,
                  org.apache.hadoop.conf.Configuration conf,
                  org.apache.hadoop.fs.FileSystem fs,
                  org.apache.hadoop.fs.Path oldLogDir)

Parameters:

p - the period of time to sleep between each run

s - the stopper

conf - configuration to use

fs - handle to the FS

oldLogDir - the path to the archived logs

Method Detail

newLogCleaner

public static LogCleanerDelegate newLogCleaner(java.lang.String className,
                                               org.apache.hadoop.conf.Configuration conf)

A utility method to create new instances of LogCleanerDelegate based on the class name of the LogCleanerDelegate.

Parameters:

className - fully qualified class name of the LogCleanerDelegate

conf -

Returns:

the new instance

addLogCleaner

public void addLogCleaner(LogCleanerDelegate logCleaner)

Add a LogCleanerDelegate to the log cleaner chain. A log file is deletable if it is deletable for each LogCleanerDelegate in the chain.

Parameters:

logCleaner -

chore

protected void chore()

Description copied from class: Chore

Look for chores. If any found, do them else just return.

Specified by:

chore in class Chore

run

public void run()

Specified by:

run in interface java.lang.Runnable

Overrides:

run in class Chore

See Also:

Thread.run()