org.apache.jackrabbit.core.lock

Interface LockManager

All Known Implementing Classes:

LockManagerImpl, XALockManager

public interface LockManager

Defines the functionality needed for locking and unlocking nodes.

Method Summary

Methods

Modifier and Type	Method and Description
void	addLockToken(SessionImpl session, String lt) Invoked by a session to inform that a lock token has been added.
void	checkLock(NodeImpl node) Check whether the node given is locked by somebody else than the current session.
void	checkLock(Path path, javax.jcr.Session session) Check whether the path given is locked by somebody else than the session described.
void	checkUnlock(javax.jcr.Session session, NodeImpl node) Check whether a session is allowed to unlock a node.
javax.jcr.lock.Lock	getLock(NodeImpl node) Returns the Lock object that applies to a node.
javax.jcr.lock.Lock[]	getLocks(SessionImpl session) Returns all locks owned by the specified session.
boolean	holdsLock(NodeImpl node) Returns true if the node given holds a lock; otherwise returns false.
boolean	isLocked(NodeImpl node) Returns true if this node is locked either as a result of a lock held by this node or by a deep lock on a node above this node; otherwise returns false
javax.jcr.lock.Lock	lock(NodeImpl node, boolean isDeep, boolean isSessionScoped) Lock a node.
javax.jcr.lock.Lock	lock(NodeImpl node, boolean isDeep, boolean isSessionScoped, long timeoutHint, String ownerInfo) Lock a node.
void	removeLockToken(SessionImpl session, String lt) Invoked by a session to inform that a lock token has been removed.
void	unlock(NodeImpl node) Removes the lock on a node given by its path.

Method Detail

lock

javax.jcr.lock.Lock lock(NodeImpl node,
                       boolean isDeep,
                       boolean isSessionScoped)
                         throws javax.jcr.lock.LockException,
                                javax.jcr.RepositoryException

Lock a node. Checks whether the node is not locked and then returns a lock object for this node.

Parameters:

node - node

isDeep - whether the lock applies to this node only

isSessionScoped - whether the lock is session scoped

Returns:

lock object

Throws:

javax.jcr.lock.LockException - if this node already is locked, or some descendant node is locked and isDeep is true

javax.jcr.RepositoryException

See Also:

Node.lock(boolean, boolean)

lock

javax.jcr.lock.Lock lock(NodeImpl node,
                       boolean isDeep,
                       boolean isSessionScoped,
                       long timeoutHint,
                       String ownerInfo)
                         throws javax.jcr.lock.LockException,
                                javax.jcr.RepositoryException

Lock a node. Checks whether the node is not locked and then returns a lock object for this node.

Parameters:

node - Node to create the lock for.

isDeep - whether the lock applies to this node only

isSessionScoped - whether the lock is session scoped

timeoutHint - Desired lock timeout in seconds.

ownerInfo - Optional string acting as information about the owner.

Returns:

the lock.

Throws:

javax.jcr.lock.LockException - if this node already is locked, or some descendant node is locked and isDeep is true

javax.jcr.RepositoryException

See Also:

LockManager.lock(String, boolean, boolean, long, String)

getLock

javax.jcr.lock.Lock getLock(NodeImpl node)
                            throws javax.jcr.lock.LockException,
                                   javax.jcr.RepositoryException

Returns the Lock object that applies to a node. This may be either a lock on this node itself or a deep lock on a node above this node.

Parameters:

node - node

Returns:

lock object

Throws:

javax.jcr.lock.LockException - if this node is not locked

javax.jcr.RepositoryException

See Also:

Node.getLock()

getLocks

javax.jcr.lock.Lock[] getLocks(SessionImpl session)
                               throws javax.jcr.RepositoryException

Returns all locks owned by the specified session.

Parameters:

session - session

Returns:

an array of lock objects

Throws:

javax.jcr.RepositoryException - if an error occurs

See Also:

SessionImpl.getLocks()

unlock

void unlock(NodeImpl node)
            throws javax.jcr.lock.LockException,
                   javax.jcr.RepositoryException

Removes the lock on a node given by its path.

Parameters:

node - node

Throws:

javax.jcr.lock.LockException - if this node is not locked or the session does not have the correct lock token

javax.jcr.RepositoryException

See Also:

Node.unlock()

holdsLock

boolean holdsLock(NodeImpl node)
                  throws javax.jcr.RepositoryException

Returns true if the node given holds a lock; otherwise returns false.

Parameters:

node - node

Returns:

true if the node given holds a lock; otherwise returns false

Throws:

javax.jcr.RepositoryException - If an exception occurs.

See Also:

Node.holdsLock()

isLocked

boolean isLocked(NodeImpl node)
                 throws javax.jcr.RepositoryException

Returns true if this node is locked either as a result of a lock held by this node or by a deep lock on a node above this node; otherwise returns false

Parameters:

node - node

Returns:

true if this node is locked either as a result of a lock held by this node or by a deep lock on a node above this node; otherwise returns false

Throws:

javax.jcr.RepositoryException - If an exception occurs.

See Also:

Node.isLocked()

checkLock

void checkLock(NodeImpl node)
               throws javax.jcr.lock.LockException,
                      javax.jcr.RepositoryException

Check whether the node given is locked by somebody else than the current session. Access is allowed if the node is not locked or if the session itself holds the lock to this node, i.e. the session contains the lock token for the lock.

Parameters:

node - node to check

Throws:

javax.jcr.lock.LockException - if write access to the specified node is not allowed

javax.jcr.RepositoryException - if some other error occurs

checkLock

void checkLock(Path path,
             javax.jcr.Session session)
               throws javax.jcr.lock.LockException,
                      javax.jcr.RepositoryException

Check whether the path given is locked by somebody else than the session described. Access is allowed if the node is not locked or if the session itself holds the lock to this node, i.e. the session contains the lock token for the lock.

Parameters:

path - path to check

session - session

Throws:

javax.jcr.lock.LockException - if write access to the specified path is not allowed

javax.jcr.RepositoryException - if some other error occurs

checkUnlock

void checkUnlock(javax.jcr.Session session,
               NodeImpl node)
                 throws javax.jcr.lock.LockException,
                        javax.jcr.RepositoryException

Check whether a session is allowed to unlock a node.

Throws:

javax.jcr.lock.LockException - if unlocking is denied

javax.jcr.RepositoryException - if some other error occurs

addLockToken

void addLockToken(SessionImpl session,
                String lt)
                  throws javax.jcr.lock.LockException,
                         javax.jcr.RepositoryException

Invoked by a session to inform that a lock token has been added.

Parameters:

session - session that has a added lock token

lt - added lock token

Throws:

javax.jcr.lock.LockException

javax.jcr.RepositoryException

removeLockToken

void removeLockToken(SessionImpl session,
                   String lt)
                     throws javax.jcr.lock.LockException,
                            javax.jcr.RepositoryException

Invoked by a session to inform that a lock token has been removed.

Parameters:

session - session that has a removed lock token

lt - removed lock token

Throws:

javax.jcr.lock.LockException

javax.jcr.RepositoryException