org.apache.hadoop.hbase.master.cleaner

类 CleanerChore<T extends FileCleanerDelegate>

java.lang.Object

org.apache.hadoop.hbase.ScheduledChore

org.apache.hadoop.hbase.master.cleaner.CleanerChore<T>

类型参数:

T - Cleaner delegate class that is dynamically loaded from configuration

所有已实现的接口:

Runnable

直接已知子类:

HFileCleaner, LogCleaner

@InterfaceAudience.Private
public abstract class CleanerChore<T extends FileCleanerDelegate>
extends ScheduledChore

Abstract Cleaner that uses a chain of delegates to clean a directory of files

字段概要

字段

限定符和类型	字段和说明
static String	CHORE_POOL_SIZE If it is an integer and >= 1, it would be the size; if 0.0 < size <= 1.0, size would be available processors * size.
protected List<T>	cleanersChain
protected org.apache.hadoop.fs.FileSystem	fs
protected Map<String,Object>	params

构造器概要

构造器

构造器和说明
CleanerChore(String name, int sleepPeriod, Stoppable s, org.apache.hadoop.conf.Configuration conf, org.apache.hadoop.fs.FileSystem fs, org.apache.hadoop.fs.Path oldFileDir, String confKey, DirScanPool pool)
CleanerChore(String name, int sleepPeriod, Stoppable s, org.apache.hadoop.conf.Configuration conf, org.apache.hadoop.fs.FileSystem fs, org.apache.hadoop.fs.Path oldFileDir, String confKey, DirScanPool pool, Map<String,Object> params)

方法概要

方法

限定符和类型	方法和说明
protected void	chore()
void	cleanup()
protected int	deleteFiles(Iterable<org.apache.hadoop.fs.FileStatus> filesToDelete) Delete the given files
boolean	getEnabled()
boolean	runCleaner()
boolean	setEnabled(boolean enabled)
protected abstract boolean	validate(org.apache.hadoop.fs.Path file) Validate the file to see if it even belongs in the directory.

从类继承的方法 org.apache.hadoop.hbase.ScheduledChore

cancel, cancel, choreForTesting, getInitialDelay, getName, getPeriod, getStopper, getTimeUnit, initialChore, isInitialChoreComplete, isScheduled, run, toString, triggerNow

从类继承的方法 java.lang.Object

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

字段详细资料

CHORE_POOL_SIZE

public static final String CHORE_POOL_SIZE

If it is an integer and >= 1, it would be the size; if 0.0 < size <= 1.0, size would be available processors * size. Pay attention that 1.0 is different from 1, former indicates it will use 100% of cores, while latter will use only 1 thread for chore to scan dir.

另请参阅:

常量字段值

fs

protected final org.apache.hadoop.fs.FileSystem fs

cleanersChain

protected List<T extends FileCleanerDelegate> cleanersChain

params

protected Map<String,Object> params

构造器详细资料

CleanerChore

public CleanerChore(String name,
            int sleepPeriod,
            Stoppable s,
            org.apache.hadoop.conf.Configuration conf,
            org.apache.hadoop.fs.FileSystem fs,
            org.apache.hadoop.fs.Path oldFileDir,
            String confKey,
            DirScanPool pool)

CleanerChore

public CleanerChore(String name,
            int sleepPeriod,
            Stoppable s,
            org.apache.hadoop.conf.Configuration conf,
            org.apache.hadoop.fs.FileSystem fs,
            org.apache.hadoop.fs.Path oldFileDir,
            String confKey,
            DirScanPool pool,
            Map<String,Object> params)

参数:

name - name of the chore being run

sleepPeriod - the period of time to sleep between each run

s - the stopper

conf - configuration to use

fs - handle to the FS

oldFileDir - the path to the archived files

confKey - configuration key for the classes to instantiate

pool - the thread pool used to scan directories

params - members could be used in cleaner

方法详细资料

validate

protected abstract boolean validate(org.apache.hadoop.fs.Path file)

Validate the file to see if it even belongs in the directory. If it is valid, then the file will go through the cleaner delegates, but otherwise the file is just deleted.

参数:

file - full Path of the file to be checked

返回:

true if the file is valid, false otherwise

chore

protected void chore()

指定者:

chore 在类中 ScheduledChore

runCleaner

public boolean runCleaner()

deleteFiles

protected int deleteFiles(Iterable<org.apache.hadoop.fs.FileStatus> filesToDelete)

Delete the given files

参数:

filesToDelete - files to delete

返回:

number of deleted files

cleanup

public void cleanup()

覆盖:

cleanup 在类中 ScheduledChore

setEnabled

public boolean setEnabled(boolean enabled)

参数:

enabled -

getEnabled

public boolean getEnabled()