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

Class CachedObjectDirectory

java.lang.Object

org.eclipse.jgit.lib.ObjectDatabase

org.eclipse.jgit.internal.storage.file.FileObjectDatabase

org.eclipse.jgit.internal.storage.file.CachedObjectDirectory

class CachedObjectDirectory
extends FileObjectDatabase

The cached instance of an ObjectDirectory.

This class caches the list of loose objects in memory, so the file system is not queried with stat calls.

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
private static class	CachedObjectDirectory.UnpackedObjectId

Nested classes/interfaces inherited from class org.eclipse.jgit.internal.storage.file.FileObjectDatabase

FileObjectDatabase.InsertLooseObjectResult

Field Summary

Fields

Modifier and Type	Field	Description
private CachedObjectDirectory[]	alts
private ObjectIdOwnerMap<CachedObjectDirectory.UnpackedObjectId>	unpackedObjects	The set that contains unpacked objects identifiers, it is created when the cached instance is created.
private ObjectDirectory	wrapped

Constructor Summary

Constructors

Constructor	Description
CachedObjectDirectory(ObjectDirectory wrapped)	The constructor

Method Summary

Modifier and Type	Method	Description
void	close()	Close any resources held by this database.
(package private) java.io.File	fileFor(AnyObjectId id)
private ObjectDirectory.AlternateHandle.Id	getAlternateId()
(package private) Config	getConfig()
(package private) java.io.File	getDirectory()
(package private) FS	getFS()
(package private) long	getObjectSize(WindowCursor curs, AnyObjectId objectId)
(package private) java.util.Collection<Pack>	getPacks()
(package private) java.util.Set<ObjectId>	getShallowCommits()
boolean	has(AnyObjectId objectId)	Does the requested object exist in this database?
private boolean	has(AnyObjectId objectId, java.util.Set<ObjectDirectory.AlternateHandle.Id> skips)
(package private) FileObjectDatabase.InsertLooseObjectResult	insertUnpackedObject(java.io.File tmp, ObjectId objectId, boolean createDuplicate)
private CachedObjectDirectory[]	myAlternates()
ObjectDatabase	newCachedDatabase()	Create a new cached database instance over this database.
(package private) ObjectLoader	openLooseObject(WindowCursor curs, AnyObjectId id)
(package private) ObjectLoader	openObject(WindowCursor curs, AnyObjectId objectId)
private ObjectLoader	openObject(WindowCursor curs, AnyObjectId objectId, java.util.Set<ObjectDirectory.AlternateHandle.Id> skips)
(package private) Pack	openPack(java.io.File pack)
(package private) void	resolve(java.util.Set<ObjectId> matches, AbbreviatedObjectId id)
private ObjectIdOwnerMap<CachedObjectDirectory.UnpackedObjectId>	scanLoose()
(package private) void	selectObjectRepresentation(PackWriter packer, ObjectToPack otp, WindowCursor curs)
private java.util.Set<ObjectDirectory.AlternateHandle.Id>	skipMe(java.util.Set<ObjectDirectory.AlternateHandle.Id> skips)

Methods inherited from class org.eclipse.jgit.internal.storage.file.FileObjectDatabase

newInserter, newReader

Methods inherited from class org.eclipse.jgit.lib.ObjectDatabase

create, exists, open, open

Methods inherited from class java.lang.Object

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

Field Detail

unpackedObjects

private ObjectIdOwnerMap<CachedObjectDirectory.UnpackedObjectId> unpackedObjects

The set that contains unpacked objects identifiers, it is created when the cached instance is created.

wrapped

private final ObjectDirectory wrapped

alts

private CachedObjectDirectory[] alts

Constructor Detail

CachedObjectDirectory

CachedObjectDirectory(ObjectDirectory wrapped)

The constructor

Parameters:

wrapped - the wrapped database

Method Detail

scanLoose

private ObjectIdOwnerMap<CachedObjectDirectory.UnpackedObjectId> scanLoose()

close

public void close()

Close any resources held by this database.

Specified by:

close in class ObjectDatabase

newCachedDatabase

public ObjectDatabase newCachedDatabase()

Create a new cached database instance over this database. This instance might optimize queries by caching some information about database. So some modifications done after instance creation might fail to be noticed.

Overrides:

newCachedDatabase in class ObjectDatabase

Returns:

new cached database instance

getDirectory

java.io.File getDirectory()

Specified by:

getDirectory in class FileObjectDatabase

fileFor

java.io.File fileFor(AnyObjectId id)

Specified by:

fileFor in class FileObjectDatabase

getConfig

Config getConfig()

Specified by:

getConfig in class FileObjectDatabase

getFS

FS getFS()

Specified by:

getFS in class FileObjectDatabase

getShallowCommits

java.util.Set<ObjectId> getShallowCommits()
                                   throws java.io.IOException

Specified by:

getShallowCommits in class FileObjectDatabase

Throws:

java.io.IOException

myAlternates

private CachedObjectDirectory[] myAlternates()

skipMe

private java.util.Set<ObjectDirectory.AlternateHandle.Id> skipMe(java.util.Set<ObjectDirectory.AlternateHandle.Id> skips)

resolve

void resolve(java.util.Set<ObjectId> matches,
             AbbreviatedObjectId id)
      throws java.io.IOException

Specified by:

resolve in class FileObjectDatabase

Throws:

java.io.IOException

has

public boolean has(AnyObjectId objectId)
            throws java.io.IOException

Does the requested object exist in this database?

This is a one-shot call interface which may be faster than allocating a ObjectDatabase.newReader() to perform the lookup.

Overrides:

has in class ObjectDatabase

Parameters:

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

Returns:

true if the specified object is stored in this database.

Throws:

java.io.IOException - the object store cannot be accessed.

has

private boolean has(AnyObjectId objectId,
                    java.util.Set<ObjectDirectory.AlternateHandle.Id> skips)
             throws java.io.IOException

Throws:

java.io.IOException

openObject

ObjectLoader openObject(WindowCursor curs,
                        AnyObjectId objectId)
                 throws java.io.IOException

Specified by:

openObject in class FileObjectDatabase

Throws:

java.io.IOException

openObject

private ObjectLoader openObject(WindowCursor curs,
                                AnyObjectId objectId,
                                java.util.Set<ObjectDirectory.AlternateHandle.Id> skips)
                         throws java.io.IOException

Throws:

java.io.IOException

getObjectSize

long getObjectSize(WindowCursor curs,
                   AnyObjectId objectId)
            throws java.io.IOException

Specified by:

getObjectSize in class FileObjectDatabase

Throws:

java.io.IOException

openLooseObject

ObjectLoader openLooseObject(WindowCursor curs,
                             AnyObjectId id)
                      throws java.io.IOException

Specified by:

openLooseObject in class FileObjectDatabase

Throws:

java.io.IOException

insertUnpackedObject

FileObjectDatabase.InsertLooseObjectResult insertUnpackedObject(java.io.File tmp,
                                                                ObjectId objectId,
                                                                boolean createDuplicate)
                                                         throws java.io.IOException

Specified by:

insertUnpackedObject in class FileObjectDatabase

Throws:

java.io.IOException

openPack

Pack openPack(java.io.File pack)
       throws java.io.IOException

Specified by:

openPack in class FileObjectDatabase

Throws:

java.io.IOException

selectObjectRepresentation

void selectObjectRepresentation(PackWriter packer,
                                ObjectToPack otp,
                                WindowCursor curs)
                         throws java.io.IOException

Specified by:

selectObjectRepresentation in class FileObjectDatabase

Throws:

java.io.IOException

getPacks

java.util.Collection<Pack> getPacks()

Specified by:

getPacks in class FileObjectDatabase

getAlternateId

private ObjectDirectory.AlternateHandle.Id getAlternateId()