Package org.apache.commons.vfs2.cache
Class DefaultFilesCache
- java.lang.Object
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- org.apache.commons.vfs2.provider.AbstractVfsComponent
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- org.apache.commons.vfs2.cache.AbstractFilesCache
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- org.apache.commons.vfs2.cache.DefaultFilesCache
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- All Implemented Interfaces:
FilesCache
,VfsComponent
public class DefaultFilesCache extends AbstractFilesCache
A simpleFilesCache
implementation.This implementation caches every file with no expire or limit. All files and filesystems are hard reachable references. This implementation holds a list of filesystem specific ConcurrentHashMaps in the main cache map.
Cached FileObjects as well as FileSystems are only removed when
clear(FileSystem)
is called (i.e. on filesystem close). When the usedFileSystemManager
is closed, it will also close this cache (which frees all entries).Despite its name, this is not the fallback implementation used by
DefaultFileSystemManager#init()
anymore.
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Constructor Summary
Constructors Constructor Description DefaultFilesCache()
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description void
clear(FileSystem filesystem)
Purges the entries corresponding to the FileSystem.void
close()
Closes the provider.FileObject
getFile(FileSystem filesystem, FileName name)
Retrieves a FileObject from the cache by name.protected java.util.concurrent.ConcurrentMap<FileName,FileObject>
getOrCreateFilesystemCache(FileSystem filesystem)
void
putFile(FileObject file)
Adds a FileObject to the cache.boolean
putFileIfAbsent(FileObject file)
Adds a FileObject to the cache if it isn't already present.void
removeFile(FileSystem filesystem, FileName name)
Removes a file from cache.-
Methods inherited from class org.apache.commons.vfs2.cache.AbstractFilesCache
touchFile
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Methods inherited from class org.apache.commons.vfs2.provider.AbstractVfsComponent
getContext, getLogger, init, setContext, setLogger
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Constructor Detail
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DefaultFilesCache
public DefaultFilesCache()
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Method Detail
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putFile
public void putFile(FileObject file)
Description copied from interface:FilesCache
Adds a FileObject to the cache.- Parameters:
file
- the file
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putFileIfAbsent
public boolean putFileIfAbsent(FileObject file)
Description copied from interface:FilesCache
Adds a FileObject to the cache if it isn't already present.- Parameters:
file
- the file- Returns:
- true if the file was stored, false otherwise.
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getFile
public FileObject getFile(FileSystem filesystem, FileName name)
Description copied from interface:FilesCache
Retrieves a FileObject from the cache by name.- Parameters:
filesystem
- The FileSystem.name
- the name- Returns:
- the file object or null if file is not cached
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clear
public void clear(FileSystem filesystem)
Description copied from interface:FilesCache
Purges the entries corresponding to the FileSystem.- Parameters:
filesystem
- The FileSystem.
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getOrCreateFilesystemCache
protected java.util.concurrent.ConcurrentMap<FileName,FileObject> getOrCreateFilesystemCache(FileSystem filesystem)
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close
public void close()
Description copied from class:AbstractVfsComponent
Closes the provider. This implementation does nothing.- Specified by:
close
in interfaceFilesCache
- Specified by:
close
in interfaceVfsComponent
- Overrides:
close
in classAbstractVfsComponent
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removeFile
public void removeFile(FileSystem filesystem, FileName name)
Description copied from interface:FilesCache
Removes a file from cache.- Parameters:
filesystem
- filesystemname
- filename
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