aQute.libg.shacache

Class ShaCache

java.lang.Object

aQute.libg.shacache.ShaCache

public class ShaCache
extends Object

Provide a standardized cache based on the SHA-1 of a file.

Constructor Summary

Constructors

Constructor and Description
ShaCache(File root) Create a SHA-1 cache on a directory.

Method Summary

Modifier and Type	Method and Description
File	getFile(String sha, ShaSource... sources) Small variation on the cache that returns a file instead of a stream
File	getRoot() Get the root to the cache
InputStream	getStream(String sha, ShaSource... sources) Return a stream that is associated with a SHA.
void	purge() Clean the cache

Methods inherited from class java.lang.Object

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

Constructor Detail

ShaCache

public ShaCache(File root)

Create a SHA-1 cache on a directory.

Parameters:

root - the directory

Method Detail

getStream

public InputStream getStream(String sha,
                             ShaSource... sources)
                      throws Exception

Return a stream that is associated with a SHA. If the SHA is not in the local cache, the given sources parameter can specify a way to get the content.

Parameters:

sha - the sha

sources - objects that can retrieve the original data

Returns:

the stream or null if not found.

Throws:

Exception

getFile

public File getFile(String sha,
                    ShaSource... sources)
             throws Exception

Small variation on the cache that returns a file instead of a stream

Parameters:

sha - the SHA-1

sources - the inputs

Returns:

a file or null

Throws:

Exception

purge

public void purge()
           throws Exception

Clean the cache

Throws:

Exception

getRoot

public File getRoot()

Get the root to the cache