Package org.eclipse.jgit.lib

Class RepositoryCache

java.lang.Object

org.eclipse.jgit.lib.RepositoryCache

public class RepositoryCache
extends Object

Cache of active Repository instances.

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static class	RepositoryCache.FileKey	Location of a Repository, using the standard java.io.File API.
static interface	RepositoryCache.Key	Abstract hash key for RepositoryCache entries.

Method Summary

Modifier and Type	Method	Description
static void	clear()	Unregister all repositories from the cache.
static void	close(Repository db)	Remove a repository from the cache.
static Repository	open(RepositoryCache.Key location)	Open an existing repository, reusing a cached instance if possible.
static Repository	open(RepositoryCache.Key location, boolean mustExist)	Open a repository, reusing a cached instance if possible.
static void	register(Repository db)	Register one repository into the cache.

Methods inherited from class java.lang.Object

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

Method Detail

open

public static Repository open(RepositoryCache.Key location)
                       throws IOException,
                              RepositoryNotFoundException

Open an existing repository, reusing a cached instance if possible.

When done with the repository, the caller must call Repository.close() to decrement the repository's usage counter.

Parameters:

location - where the local repository is. Typically a RepositoryCache.FileKey.

Returns:

the repository instance requested; caller must close when done.

Throws:

IOException - the repository could not be read (likely its core.version property is not supported).

RepositoryNotFoundException - there is no repository at the given location.

open

public static Repository open(RepositoryCache.Key location,
                              boolean mustExist)
                       throws IOException

Open a repository, reusing a cached instance if possible.

When done with the repository, the caller must call Repository.close() to decrement the repository's usage counter.

Parameters:

location - where the local repository is. Typically a RepositoryCache.FileKey.

mustExist - If true, and the repository is not found, throws RepositoryNotFoundException. If false, a repository instance is created and registered anyway.

Returns:

the repository instance requested; caller must close when done.

Throws:

IOException - the repository could not be read (likely its core.version property is not supported).

RepositoryNotFoundException - There is no repository at the given location, only thrown if mustExist is true.

register

public static void register(Repository db)

Register one repository into the cache.

During registration the cache automatically increments the usage counter, permitting it to retain the reference. A RepositoryCache.FileKey for the repository's Repository.getDirectory() is used to index the repository in the cache.

If another repository already is registered in the cache at this location, the other instance is closed.

Parameters:

db - repository to register.

close

public static void close(Repository db)

Remove a repository from the cache.

Removes a repository from the cache, if it is still registered here, permitting it to close.

Parameters:

db - repository to unregister.

clear

public static void clear()

Unregister all repositories from the cache.