# Uses of Class
org.apache.lucene.store.FSDirectory

Packages that use FSDirectory
Package
Description
org.apache.lucene.store
Binary i/o API, used for all index data.
org.apache.lucene.util
Some utility classes.

## Uses of FSDirectory in org.apache.lucene.store

Subclasses of FSDirectory in org.apache.lucene.store
Modifier and Type
Class
Description
`class`
`MMapDirectory`
File-based `Directory` implementation that uses mmap for reading, and `FSDirectory.FSIndexOutput` for writing.
`class`
`NIOFSDirectory`
An `FSDirectory` implementation that uses java.nio's FileChannel's positional read, which allows multiple threads to read from the same file without synchronizing.
Methods in org.apache.lucene.store that return FSDirectory
Modifier and Type
Method
Description
`static FSDirectory`
FSDirectory.`open(Path path)`
Creates an FSDirectory instance, trying to pick the best implementation given the current environment.
`static FSDirectory`
FSDirectory.`open(Path path, LockFactory lockFactory)`
Just like `open(Path)`, but allows you to also specify a custom `LockFactory`.
Methods in org.apache.lucene.store with parameters of type FSDirectory
Modifier and Type
Method
Description
`protected abstract Lock`
FSLockFactory.`obtainFSLock(FSDirectory dir, String lockName)`
Implement this method to obtain a lock for a FSDirectory instance.
`protected Lock`
NativeFSLockFactory.`obtainFSLock(FSDirectory dir, String lockName)`
`protected Lock`
SimpleFSLockFactory.`obtainFSLock(FSDirectory dir, String lockName)`

## Uses of FSDirectory in org.apache.lucene.util

Methods in org.apache.lucene.util that return FSDirectory
Modifier and Type
Method
Description
`static FSDirectory`
CommandLineUtil.`newFSDirectory(Class<? extends FSDirectory> clazz, Path path)`
Creates a new specific FSDirectory instance
`static FSDirectory`
CommandLineUtil.`newFSDirectory(Class<? extends FSDirectory> clazz, Path path, LockFactory lf)`
Creates a new specific FSDirectory instance
`static FSDirectory`
CommandLineUtil.`newFSDirectory(String clazzName, Path path)`
Creates a specific FSDirectory instance starting from its class name, using the default lock factory
`static FSDirectory`
CommandLineUtil.`newFSDirectory(String clazzName, Path path, LockFactory lf)`
Creates a specific FSDirectory instance starting from its class name
Methods in org.apache.lucene.util that return types with arguments of type FSDirectory
Modifier and Type
Method
Description
`static Class<? extends FSDirectory>`
CommandLineUtil.`loadFSDirectoryClass(String clazzName)`
Loads a specific FSDirectory implementation
Method parameters in org.apache.lucene.util with type arguments of type FSDirectory
Modifier and Type
Method
Description
`static FSDirectory`
CommandLineUtil.`newFSDirectory(Class<? extends FSDirectory> clazz, Path path)`
Creates a new specific FSDirectory instance
`static FSDirectory`
CommandLineUtil.`newFSDirectory(Class<? extends FSDirectory> clazz, Path path, LockFactory lf)`
Creates a new specific FSDirectory instance