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sun.nio.ch

pack-priv Class FileLockTable

Class Inheritance

extends Object

java.lang.Object
sun.nio.ch.FileLockTable

Imports

java.io.FileDescriptor, .IOException, java.lang.ref.ReferenceQueue, .WeakReference, java.nio.channels.Channel, .FileLock, .OverlappingFileLockException, java.util.ArrayList, .HashSet, .List, .Set, java.util.concurrent.ConcurrentHashMap

A file lock table that is over a system-wide map of all file locks.

Nested and Inner Type Summary

Modifier and Type	Class and Description
private static class	FileLockTable.FileLockReference A weak reference to a FileLock.

Field Summary

Modifier and Type	Field and Description
private final Channel	channel
private final FileKey	fileKey
private static final ConcurrentHashMap<FileKey, List<FileLockTable.FileLockReference>>	lockMap
private final Set<FileLock>	locks
private static final ReferenceQueue<FileLock>	queue

Constructor Summary

Access	Constructor and Description
pack-priv	FileLockTable(Channel channel, FileDescriptor fd) Creates a file lock table for a channel that is connected to the system-wide map of all file locks for the Java virtual machine.

Method Summary

Modifier and Type	Method and Description
pack-priv void	add(FileLock fl)
private void	checkList(List<FileLockTable.FileLockReference> list, long position, long size)
pack-priv void	remove(FileLock fl)
pack-priv List<FileLock>	removeAll()
private void	removeKeyIfEmpty(FileKey fk, List<FileLockTable.FileLockReference> list)
private void	removeStaleEntries()
pack-priv void	replace(FileLock fromLock, FileLock toLock)

Inherited from java.lang.Object:: clone equals finalize getClass hashCode notify notifyAll toString wait wait wait

Field Detail

channel	back to summary
private final Channel channel

fileKey	back to summary
private final FileKey fileKey

lockMap	back to summary
private static final ConcurrentHashMap<FileKey, List<FileLockTable.FileLockReference>> lockMap

locks	back to summary
private final Set<FileLock> locks

queue	back to summary
private static final ReferenceQueue<FileLock> queue

Constructor Detail

FileLockTable	back to summary
pack-priv FileLockTable(Channel channel, FileDescriptor fd) throws IOException Creates a file lock table for a channel that is connected to the system-wide map of all file locks for the Java virtual machine.

Method Detail

add	back to summary
pack-priv void add(FileLock fl) throws OverlappingFileLockException

checkList	back to summary
private void checkList(List<FileLockTable.FileLockReference> list, long position, long size) throws OverlappingFileLockException

remove	back to summary
pack-priv void remove(FileLock fl)

removeAll	back to summary
pack-priv List<FileLock> removeAll()

removeKeyIfEmpty	back to summary
private void removeKeyIfEmpty(FileKey fk, List<FileLockTable.FileLockReference> list)

removeStaleEntries	back to summary
private void removeStaleEntries()

replace	back to summary
pack-priv void replace(FileLock fromLock, FileLock toLock)

sun.nio.ch back to summary

private Class FileLockTable.FileLockReference

Class Inheritance

extends WeakReference<FileLock>

java.lang.Object
java.lang.ref.Reference
java.lang.ref.WeakReference
sun.nio.ch.FileLockTable.FileLockReference

A weak reference to a FileLock.

FileLockTable uses a list of file lock references to avoid keeping the FileLock (and FileChannel) alive.

Field Summary

Modifier and Type	Field and Description
private final FileKey	fileKey

Constructor Summary

Access	Constructor and Description
pack-priv	FileLockReference(FileLock referent, ReferenceQueue<FileLock> queue, FileKey key)

Method Summary

Modifier and Type	Method and Description
pack-priv FileKey	fileKey()

Field Detail

fileKey	back to summary
private final FileKey fileKey

Constructor Detail

FileLockReference	back to summary
pack-priv FileLockReference(FileLock referent, ReferenceQueue<FileLock> queue, FileKey key)

Method Detail

fileKey	back to summary
pack-priv FileKey fileKey()