Package org.apache.bookkeeper.util

Class DiskChecker

java.lang.Object

org.apache.bookkeeper.util.DiskChecker

public class DiskChecker
extends Object

Class that provides utility functions for checking disk problems.

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static class	DiskChecker.DiskErrorException	A disk error exception.
static class	DiskChecker.DiskException	A general marker for disk-related exceptions.
static class	DiskChecker.DiskOutOfSpaceException	An out-of-space disk exception.
static class	DiskChecker.DiskWarnThresholdException	A disk warn threshold exception.

Constructor Summary

Constructors

Constructor	Description
DiskChecker(float threshold, float warnThreshold)

Method Summary

Modifier and Type	Method	Description
float	checkDir(File dir)	Create the directory if it doesn't exist.
(package private) float	checkDiskFull(File dir)	Checks the disk space available.
float	getDiskUsageThreshold()
float	getDiskUsageWarnThreshold()
long	getTotalDiskSpace(List<File> dirs)	Calculate the total amount of disk space in all of the ledger directories put together.
float	getTotalDiskUsage(List<File> dirs)	calculates and returns the disk usage factor in the provided list of dirs.
long	getTotalFreeSpace(List<File> dirs)	Calculate the total amount of free space available in all of the ledger directories put together.
(package private) void	setDiskSpaceThreshold(float diskSpaceThreshold, float diskUsageWarnThreshold)	Set the disk space threshold.

Methods inherited from class java.lang.Object

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

Constructor Details

DiskChecker

public DiskChecker(float threshold,
 float warnThreshold)

Method Details

checkDiskFull

float checkDiskFull(File dir)
             throws DiskChecker.DiskOutOfSpaceException,
DiskChecker.DiskWarnThresholdException

Checks the disk space available.

Parameters:

dir - Directory to check for the disk space

Throws:

DiskChecker.DiskOutOfSpaceException - Throws DiskChecker.DiskOutOfSpaceException if available space is less than threshold.

DiskChecker.DiskWarnThresholdException

getTotalFreeSpace

public long getTotalFreeSpace(List<File> dirs)
                       throws IOException

Calculate the total amount of free space available in all of the ledger directories put together.

Returns:

freeDiskSpace in bytes

Throws:

IOException

getTotalDiskSpace

public long getTotalDiskSpace(List<File> dirs)
                       throws IOException

Calculate the total amount of disk space in all of the ledger directories put together.

Returns:

totalDiskSpace in bytes

Throws:

IOException

getTotalDiskUsage

public float getTotalDiskUsage(List<File> dirs)
                        throws IOException

calculates and returns the disk usage factor in the provided list of dirs.

Parameters:

dirs - list of directories

Returns:

disk usage factor in the provided list of dirs

Throws:

IOException

checkDir

public float checkDir(File dir)
               throws DiskChecker.DiskErrorException,
DiskChecker.DiskOutOfSpaceException,
DiskChecker.DiskWarnThresholdException

Create the directory if it doesn't exist.

Parameters:

dir - Directory to check for the disk error/full.

Throws:

DiskChecker.DiskErrorException - If disk having errors

DiskChecker.DiskWarnThresholdException - If disk has less than configured amount of free space.

DiskChecker.DiskOutOfSpaceException - If disk is full or having less space than threshold

setDiskSpaceThreshold

void setDiskSpaceThreshold(float diskSpaceThreshold,
 float diskUsageWarnThreshold)

Set the disk space threshold.

Parameters:

diskSpaceThreshold -

getDiskUsageThreshold

public float getDiskUsageThreshold()

getDiskUsageWarnThreshold

public float getDiskUsageWarnThreshold()