Class FileSystemState

java.lang.Object

com.google.common.jimfs.FileSystemState

All Implemented Interfaces:

Closeable, AutoCloseable

final class FileSystemState
extends Object
implements Closeable

Object that manages the open/closed state of a file system, ensuring that all open resources are closed when the file system is closed and that file system methods throw an exception when the file system has been closed.

Field Summary

Fields

Modifier and Type	Field	Description
private final FileTimeSource	fileTimeSource
private final Runnable	onClose
private final AtomicBoolean	open
private final AtomicInteger	registering	Count of resources currently in the process of being registered.
private final Set<Closeable>	resources

Constructor Summary

Constructors

Constructor	Description
FileSystemState(FileTimeSource fileTimeSource, Runnable onClose)

Method Summary

Modifier and Type	Method	Description
void	checkOpen()	Checks that the file system is open, throwing ClosedFileSystemException if it is not.
void	close()	Closes the file system, runs the onClose callback and closes all registered resources.
boolean	isOpen()	Returns whether or not the file system is open.
FileTime	now()	Returns the current FileTime.
<C extends Closeable> C	register(C resource)	Registers the given resource to be closed when the file system is closed.
void	unregister(Closeable resource)	Unregisters the given resource.

Methods inherited from class Object

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

Field Details

resources

private final Set<Closeable> resources

fileTimeSource

private final FileTimeSource fileTimeSource

onClose

private final Runnable onClose

open

private final AtomicBoolean open

registering

private final AtomicInteger registering

Count of resources currently in the process of being registered.

Constructor Details

FileSystemState

FileSystemState(FileTimeSource fileTimeSource,
 Runnable onClose)

Method Details

isOpen

public boolean isOpen()

Returns whether or not the file system is open.

checkOpen

public void checkOpen()

Checks that the file system is open, throwing ClosedFileSystemException if it is not.

register

@CanIgnoreReturnValue
public <C extends Closeable> C register(C resource)

Registers the given resource to be closed when the file system is closed. Should be called when the resource is opened.

unregister

public void unregister(Closeable resource)

Unregisters the given resource. Should be called when the resource is closed.

now

public FileTime now()

Returns the current FileTime.

close

public void close()
           throws IOException

Closes the file system, runs the onClose callback and closes all registered resources.

Specified by:

close in interface AutoCloseable

Specified by:

close in interface Closeable

Throws:

IOException