org.apache.solr.core
Class CachingDirectoryFactory

java.lang.Object
  org.apache.solr.core.DirectoryFactory
      org.apache.solr.core.CachingDirectoryFactory

All Implemented Interfaces:

Closeable, NamedListInitializedPlugin

Direct Known Subclasses:

EphemeralDirectoryFactory, HdfsDirectoryFactory, StandardDirectoryFactory

public abstract class CachingDirectoryFactory
extends DirectoryFactory

A DirectoryFactory impl base class for caching Directory instances per path. Most DirectoryFactory implementations will want to extend this class and simply implement DirectoryFactory.create(String, DirContext). This is an expert class and these API's are subject to change.

Nested Class Summary

protected class	CachingDirectoryFactory.CacheValue
static interface	CachingDirectoryFactory.CloseListener

Nested classes/interfaces inherited from class org.apache.solr.core.DirectoryFactory

DirectoryFactory.DirContext

Field Summary

protected Map<Directory,CachingDirectoryFactory.CacheValue>	byDirectoryCache
protected Map<String,CachingDirectoryFactory.CacheValue>	byPathCache
protected Map<Directory,List<CachingDirectoryFactory.CloseListener>>	closeListeners
protected Set<CachingDirectoryFactory.CacheValue>	removeEntries

Fields inherited from class org.apache.solr.core.DirectoryFactory

IOCONTEXT_NO_CACHE

Constructor Summary

CachingDirectoryFactory()

Method Summary

void	addCloseListener(Directory dir, CachingDirectoryFactory.CloseListener closeListener) Adds a close listener for a Directory.
void	close() Close the this and all of the Directories it contains.
protected abstract Directory	create(String path, DirectoryFactory.DirContext dirContext) Creates a new Directory for a given path.
void	doneWithDirectory(Directory directory) Indicates a Directory will no longer be used, and when it's ref count hits 0, it can be closed.
boolean	exists(String path) Returns true if a Directory exists for a given path.
Directory	get(String path, DirectoryFactory.DirContext dirContext, String rawLockType) Returns the Directory for a given path, using the specified rawLockType.
Set<String>	getLivePaths() Test only method for inspecting the cache
void	incRef(Directory directory) Increment the number of references to the given Directory.
void	init(NamedList args)
String	normalize(String path) Normalize a given path.
void	release(Directory directory) Releases the Directory so that it may be closed when it is no longer referenced.
void	remove(Directory dir) Removes the Directory's persistent storage.
void	remove(Directory dir, boolean deleteAfterCoreClose) Removes the Directory's persistent storage.
void	remove(String path) This remove is special in that it may be called even after the factory has been closed.
void	remove(String path, boolean deleteAfterCoreClose) This remove is special in that it may be called even after the factory has been closed.
protected void	removeDirectory(CachingDirectoryFactory.CacheValue cacheValue)
protected String	stripTrailingSlash(String path)

Methods inherited from class org.apache.solr.core.DirectoryFactory

empty, getDataHome, isAbsolute, isPersistent, move, searchersReserveCommitPoints, sizeOf, sizeOfDirectory

Methods inherited from class java.lang.Object

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

Field Detail

byPathCache

protected Map<String,CachingDirectoryFactory.CacheValue> byPathCache

byDirectoryCache

protected Map<Directory,CachingDirectoryFactory.CacheValue> byDirectoryCache

closeListeners

protected Map<Directory,List<CachingDirectoryFactory.CloseListener>> closeListeners

removeEntries

protected Set<CachingDirectoryFactory.CacheValue> removeEntries

Constructor Detail

CachingDirectoryFactory

public CachingDirectoryFactory()

Method Detail

addCloseListener

public void addCloseListener(Directory dir,
                             CachingDirectoryFactory.CloseListener closeListener)

Description copied from class: DirectoryFactory

Adds a close listener for a Directory.

Specified by:

addCloseListener in class DirectoryFactory

doneWithDirectory

public void doneWithDirectory(Directory directory)
                       throws IOException

Description copied from class: DirectoryFactory

Indicates a Directory will no longer be used, and when it's ref count hits 0, it can be closed. On shutdown all directories will be closed whether this has been called or not. This is simply to allow early cleanup.

Specified by:

doneWithDirectory in class DirectoryFactory

Throws:

IOException - If there is a low-level I/O error.

close

public void close()
           throws IOException

Description copied from class: DirectoryFactory

Close the this and all of the Directories it contains.

Specified by:

close in interface Closeable

Specified by:

close in class DirectoryFactory

Throws:

IOException - If there is a low-level I/O error.

create

protected abstract Directory create(String path,
                                    DirectoryFactory.DirContext dirContext)
                             throws IOException

Description copied from class: DirectoryFactory

Creates a new Directory for a given path.

Specified by:

create in class DirectoryFactory

Throws:

IOException - If there is a low-level I/O error.

exists

public boolean exists(String path)
               throws IOException

Description copied from class: DirectoryFactory

Returns true if a Directory exists for a given path.

Specified by:

exists in class DirectoryFactory

Throws:

IOException - If there is a low-level I/O error.

get

public final Directory get(String path,
                           DirectoryFactory.DirContext dirContext,
                           String rawLockType)
                    throws IOException

Description copied from class: DirectoryFactory

Returns the Directory for a given path, using the specified rawLockType. Will return the same Directory instance for the same path.

Specified by:

get in class DirectoryFactory

Throws:

IOException - If there is a low-level I/O error.

incRef

public void incRef(Directory directory)

Description copied from class: DirectoryFactory

Increment the number of references to the given Directory. You must call release for every call to this method.

Specified by:

incRef in class DirectoryFactory

init

public void init(NamedList args)

release

public void release(Directory directory)
             throws IOException

Description copied from class: DirectoryFactory

Releases the Directory so that it may be closed when it is no longer referenced.

Specified by:

release in class DirectoryFactory

Throws:

IOException - If there is a low-level I/O error.

remove

public void remove(String path)
            throws IOException

Description copied from class: DirectoryFactory

This remove is special in that it may be called even after the factory has been closed. Remove only makes sense for persistent directory factories.

Specified by:

remove in class DirectoryFactory

Parameters:

path - to remove

Throws:

IOException - If there is a low-level I/O error.

remove

public void remove(Directory dir)
            throws IOException

Description copied from class: DirectoryFactory

Removes the Directory's persistent storage. For example: A file system impl may remove the on disk directory.

Specified by:

remove in class DirectoryFactory

Throws:

IOException - If there is a low-level I/O error.

remove

public void remove(String path,
                   boolean deleteAfterCoreClose)
            throws IOException

Description copied from class: DirectoryFactory

This remove is special in that it may be called even after the factory has been closed. Remove only makes sense for persistent directory factories.

Specified by:

remove in class DirectoryFactory

Parameters:

path - to remove

deleteAfterCoreClose - whether to wait until after the core is closed.

Throws:

IOException - If there is a low-level I/O error.

remove

public void remove(Directory dir,
                   boolean deleteAfterCoreClose)
            throws IOException

Description copied from class: DirectoryFactory

Removes the Directory's persistent storage. For example: A file system impl may remove the on disk directory.

Specified by:

remove in class DirectoryFactory

Throws:

IOException - If there is a low-level I/O error.

removeDirectory

protected void removeDirectory(CachingDirectoryFactory.CacheValue cacheValue)
                        throws IOException

Throws:

IOException

normalize

public String normalize(String path)
                 throws IOException

Description copied from class: DirectoryFactory

Normalize a given path.

Overrides:

normalize in class DirectoryFactory

Parameters:

path - to normalize

Returns:

normalized path

Throws:

IOException - on io error

stripTrailingSlash

protected String stripTrailingSlash(String path)

getLivePaths

public Set<String> getLivePaths()

Test only method for inspecting the cache

Returns:

paths in the cache which have not been marked "done"

See Also:

doneWithDirectory(org.apache.lucene.store.Directory)

NOTE: This API is for internal purposes only and might change in incompatible ways in the next release.