org.eclipse.jgit.storage.file

Class WindowCacheConfig

java.lang.Object

org.eclipse.jgit.storage.file.WindowCacheConfig

public class WindowCacheConfig
extends Object

Configuration parameters for JVM-wide buffer cache used by JGit.

Field Summary

Fields

Modifier and Type	Field and Description
static int	KB 1024 (number of bytes in one kibibyte/kilobyte)
static int	MB 1024 KB (number of bytes in one mebibyte/megabyte)

Constructor Summary

Constructors

Constructor and Description
WindowCacheConfig() Create a default configuration.

Method Summary

Modifier and Type	Method and Description
WindowCacheConfig	fromConfig(Config rc) Update properties by setting fields from the configuration.
int	getDeltaBaseCacheLimit()
long	getPackedGitLimit()
int	getPackedGitOpenFiles()
int	getPackedGitWindowSize()
int	getStreamFileThreshold()
void	install() Install this configuration as the live settings.
boolean	isPackedGitMMAP()
void	setDeltaBaseCacheLimit(int newLimit)
void	setPackedGitLimit(long newLimit)
void	setPackedGitMMAP(boolean usemmap)
void	setPackedGitOpenFiles(int fdLimit)
void	setPackedGitWindowSize(int newSize)
void	setStreamFileThreshold(int newLimit)

Methods inherited from class java.lang.Object

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

Field Detail

KB

public static final int KB

1024 (number of bytes in one kibibyte/kilobyte)

See Also:

Constant Field Values

MB

public static final int MB

1024 KB (number of bytes in one mebibyte/megabyte)

See Also:

Constant Field Values

Constructor Detail

WindowCacheConfig

public WindowCacheConfig()

Create a default configuration.

Method Detail

getPackedGitOpenFiles

public int getPackedGitOpenFiles()

Returns:

maximum number of streams to open at a time. Open packs count against the process limits. Default is 128.

setPackedGitOpenFiles

public void setPackedGitOpenFiles(int fdLimit)

Parameters:

fdLimit - maximum number of streams to open at a time. Open packs count against the process limits

getPackedGitLimit

public long getPackedGitLimit()

Returns:

maximum number bytes of heap memory to dedicate to caching pack file data. Default is 10 MB.

setPackedGitLimit

public void setPackedGitLimit(long newLimit)

Parameters:

newLimit - maximum number bytes of heap memory to dedicate to caching pack file data.

getPackedGitWindowSize

public int getPackedGitWindowSize()

Returns:

size in bytes of a single window mapped or read in from the pack file. Default is 8 KB.

setPackedGitWindowSize

public void setPackedGitWindowSize(int newSize)

Parameters:

newSize - size in bytes of a single window read in from the pack file.

isPackedGitMMAP

public boolean isPackedGitMMAP()

Returns:

true enables use of Java NIO virtual memory mapping for windows; false reads entire window into a byte[] with standard read calls. Default false.

setPackedGitMMAP

public void setPackedGitMMAP(boolean usemmap)

Parameters:

usemmap - true enables use of Java NIO virtual memory mapping for windows; false reads entire window into a byte[] with standard read calls.

getDeltaBaseCacheLimit

public int getDeltaBaseCacheLimit()

Returns:

maximum number of bytes to cache in delta base cache for inflated, recently accessed objects, without delta chains. Default 10 MB.

setDeltaBaseCacheLimit

public void setDeltaBaseCacheLimit(int newLimit)

Parameters:

newLimit - maximum number of bytes to cache in delta base cache for inflated, recently accessed objects, without delta chains.

getStreamFileThreshold

public int getStreamFileThreshold()

Returns:

the size threshold beyond which objects must be streamed.

setStreamFileThreshold

public void setStreamFileThreshold(int newLimit)

Parameters:

newLimit - new byte limit for objects that must be streamed. Objects smaller than this size can be obtained as a contiguous byte array, while objects bigger than this size require using an ObjectStream.

fromConfig

public WindowCacheConfig fromConfig(Config rc)

Update properties by setting fields from the configuration.

If a property is not defined in the configuration, then it is left unmodified.

Parameters:

rc - configuration to read properties from.

Returns:

this.

Since:

3.0

install

public void install()

Install this configuration as the live settings.

The new configuration is applied immediately. If the new limits are smaller than what what is currently cached, older entries will be purged as soon as possible to allow the cache to meet the new limit.

Since:

3.0