Package org.eclipse.jgit.internal.storage.file

Class PackDirectory

java.lang.Object

org.eclipse.jgit.internal.storage.file.PackDirectory

class PackDirectory
extends java.lang.Object

Traditional file system packed objects directory handler.

This is the Packs object representation for a Git object database, where objects are stored in compressed containers known as Packs.

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
(package private) static class	PackDirectory.PackList

Field Summary

Fields

Modifier and Type	Field	Description
private Config	config
private java.io.File	directory
private static org.slf4j.Logger	LOG
private static PackDirectory.PackList	NO_PACKS
private java.util.concurrent.atomic.AtomicReference<PackDirectory.PackList>	packList

Constructor Summary

Constructors

Constructor	Description
PackDirectory(Config config, java.io.File directory)	Initialize a reference to an on-disk 'pack' directory.

Method Summary

Modifier and Type	Method	Description
(package private) void	close()
(package private) void	create()
private boolean	doLogExponentialBackoff(int n)
(package private) java.io.File	getDirectory()	Getter for the field directory.
(package private) Pack	getPack(AnyObjectId objectId)	Get the Pack for the specified object if it is stored in this PackDirectory.
private java.util.Map<java.lang.String,java.util.Map<PackExt,PackFile>>	getPackFilesByExtById()	Scans the pack directory for PackFiles and returns them organized by their extensions and their pack ids Skips files in the directory that we cannot create a PackFile for.
(package private) java.util.Collection<Pack>	getPacks()
(package private) long	getSize(WindowCursor curs, AnyObjectId id)
private void	handlePackError(java.io.IOException e, Pack p)
(package private) boolean	has(AnyObjectId objectId)	Does the requested object exist in this PackDirectory?
private static int	indexOf(Pack[] list, Pack pack)
(package private) void	insert(Pack pack)
(package private) ObjectLoader	open(WindowCursor curs, AnyObjectId objectId)
private void	remove(Pack deadPack)
(package private) boolean	resolve(java.util.Set<ObjectId> matches, AbbreviatedObjectId id, int matchLimit)	Find objects matching the prefix abbreviation.
private static java.util.Map<java.lang.String,Pack>	reuseMap(PackDirectory.PackList old)
private PackDirectory.PackList	scanPacks(PackDirectory.PackList original)
private PackDirectory.PackList	scanPacksImpl(PackDirectory.PackList old)
(package private) boolean	searchPacksAgain(PackDirectory.PackList old)
(package private) void	selectRepresentation(PackWriter packer, ObjectToPack otp, WindowCursor curs)
java.lang.String	toString()

Methods inherited from class java.lang.Object

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

Field Detail

LOG

private static final org.slf4j.Logger LOG

NO_PACKS

private static final PackDirectory.PackList NO_PACKS

config

private final Config config

directory

private final java.io.File directory

packList

private final java.util.concurrent.atomic.AtomicReference<PackDirectory.PackList> packList

Constructor Detail

PackDirectory

PackDirectory(Config config,
              java.io.File directory)

Initialize a reference to an on-disk 'pack' directory.

Parameters:

config - configuration this directory consults for write settings.

directory - the location of the pack directory.

Method Detail

getDirectory

java.io.File getDirectory()

Getter for the field directory.

Returns:

the location of the pack directory.

create

void create()
     throws java.io.IOException

Throws:

java.io.IOException

close

void close()

getPacks

java.util.Collection<Pack> getPacks()

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object

has

boolean has(AnyObjectId objectId)

Does the requested object exist in this PackDirectory?

Parameters:

objectId - identity of the object to test for existence of.

Returns:

true if the specified object is stored in this PackDirectory.

getPack

@Nullable
Pack getPack(AnyObjectId objectId)

Get the Pack for the specified object if it is stored in this PackDirectory.

Parameters:

objectId - identity of the object to find the Pack for.

Returns:

Pack which contains the specified object or null if it is not stored in this PackDirectory.

resolve

boolean resolve(java.util.Set<ObjectId> matches,
                AbbreviatedObjectId id,
                int matchLimit)

Find objects matching the prefix abbreviation.

Parameters:

matches - set to add any located ObjectIds to. This is an output parameter.

id - prefix to search for.

matchLimit - maximum number of results to return. At most this many ObjectIds should be added to matches before returning.

Returns:

true if the matches were exhausted before reaching maxLimit.

open

ObjectLoader open(WindowCursor curs,
                  AnyObjectId objectId)

getSize

long getSize(WindowCursor curs,
             AnyObjectId id)

selectRepresentation

void selectRepresentation(PackWriter packer,
                          ObjectToPack otp,
                          WindowCursor curs)

handlePackError

private void handlePackError(java.io.IOException e,
                             Pack p)

doLogExponentialBackoff

private boolean doLogExponentialBackoff(int n)

Parameters:

n - count of consecutive failures

Returns:

searchPacksAgain

boolean searchPacksAgain(PackDirectory.PackList old)

insert

void insert(Pack pack)

remove

private void remove(Pack deadPack)

indexOf

private static int indexOf(Pack[] list,
                           Pack pack)

scanPacks

private PackDirectory.PackList scanPacks(PackDirectory.PackList original)

scanPacksImpl

private PackDirectory.PackList scanPacksImpl(PackDirectory.PackList old)

reuseMap

private static java.util.Map<java.lang.String,Pack> reuseMap(PackDirectory.PackList old)

getPackFilesByExtById

private java.util.Map<java.lang.String,java.util.Map<PackExt,PackFile>> getPackFilesByExtById()

Scans the pack directory for PackFiles and returns them organized by their extensions and their pack ids Skips files in the directory that we cannot create a PackFile for.

Returns:

a map of PackFiles and PackExts keyed by pack ids