org.hibernate.search.store.impl

Class DirectoryProviderHelper

java.lang.Object

org.hibernate.search.store.impl.DirectoryProviderHelper

public final class DirectoryProviderHelper
extends Object

Author:

Emmanuel Bernard, Sanne Grinovero, Hardy Ferentschik

Method Summary

Methods

Modifier and Type	Method and Description
static boolean	configurationExplicitlySetsLockFactory(Properties dirConfiguration)
static FSDirectory	createFSIndex(File indexDir, Properties properties) Creates an FSDirectory in provided directory and initializes an index if not already existing.
static LockFactory	createLockFactory(File indexDir, Properties dirConfiguration) Creates a LockFactory as selected in the configuration for the DirectoryProvider.
static long	getCopyBufferSize(String indexName, Properties properties) Users may configure the number of MB to use as "chunk size" for large file copy operations performed by DirectoryProviders.
static File	getSourceDirectory(String indexName, Properties properties, boolean needWritePermissions) Build a directory name out of a root and relative path, guessing the significant part and checking for the file availability
static File	getVerifiedIndexDir(String annotatedIndexName, Properties properties, boolean verifyIsWritable) Verify the index directory exists and is writable, or creates it if not existing.
static void	initializeIndexIfNeeded(Directory directory) Initialize the Lucene Directory if it isn't already.
static boolean	isNativeLockingStrategy(Properties dirConfiguration)

Methods inherited from class java.lang.Object

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

Method Detail

getSourceDirectory

public static File getSourceDirectory(String indexName,
                      Properties properties,
                      boolean needWritePermissions)

Build a directory name out of a root and relative path, guessing the significant part and checking for the file availability

Parameters:

indexName - the name of the index (directory) to create

properties - the configuration properties

needWritePermissions - when true the directory will be tested for read-write permissions.

Returns:

The file representing the source directory

createFSIndex

public static FSDirectory createFSIndex(File indexDir,
                        Properties properties)
                                 throws IOException

Creates an FSDirectory in provided directory and initializes an index if not already existing.

Parameters:

indexDir - the directory where to write a new index

properties - the configuration properties

Returns:

the created FSDirectory instance

Throws:

IOException - if an error

initializeIndexIfNeeded

public static void initializeIndexIfNeeded(Directory directory)

Initialize the Lucene Directory if it isn't already.

Parameters:

directory - the Directory to initialize

Throws:

SearchException - in case of lock acquisition timeouts, IOException, or if a corrupt index is found

configurationExplicitlySetsLockFactory

public static boolean configurationExplicitlySetsLockFactory(Properties dirConfiguration)

Parameters:

dirConfiguration - the properties representing the configuration for this index

Returns:

true if the configuration contains an override for the locking_strategy

isNativeLockingStrategy

public static boolean isNativeLockingStrategy(Properties dirConfiguration)

createLockFactory

public static LockFactory createLockFactory(File indexDir,
                            Properties dirConfiguration)

Creates a LockFactory as selected in the configuration for the DirectoryProvider. The SimpleFSLockFactory and NativeFSLockFactory need a File to know where to stock the filesystem based locks; other implementations ignore this parameter.

Parameters:

indexDir - the directory to use to store locks, if needed by implementation

dirConfiguration - the configuration of current DirectoryProvider

Returns:

the LockFactory as configured, or a SimpleFSLockFactory in case of configuration errors or as a default.

Throws:

IOException - if any.

getVerifiedIndexDir

public static File getVerifiedIndexDir(String annotatedIndexName,
                       Properties properties,
                       boolean verifyIsWritable)

Verify the index directory exists and is writable, or creates it if not existing.

Parameters:

annotatedIndexName - The index name declared on the @Indexed annotation

properties - The properties may override the indexname.

verifyIsWritable - Verify the directory is writable

Returns:

the File representing the Index Directory

Throws:

SearchException - if any.

getCopyBufferSize

public static long getCopyBufferSize(String indexName,
                     Properties properties)

Users may configure the number of MB to use as "chunk size" for large file copy operations performed by DirectoryProviders.

Parameters:

indexName - the index name

properties - the configuration properties

Returns:

the number of Bytes to use as "chunk size" in file copy operations.