org.alfresco.service.cmr.lock

Interface LockService

All Known Implementing Classes:

LockServiceImpl

@AlfrescoPublicApi
public interface LockService

Interface for public and internal lock operations.

Author:

Roy Wetherall

Method Summary

Methods

Modifier and Type	Method and Description
void	checkForLock(org.alfresco.service.cmr.repository.NodeRef nodeRef) Checks to see if the current user has access to the specified node.
void	enableLocks() After calling suspendLocks turn the locks back on.
String	getAdditionalInfo(org.alfresco.service.cmr.repository.NodeRef nodeRef) Retrieve the additional lock info associated with a node ref.
LockState	getLockState(org.alfresco.service.cmr.repository.NodeRef nodeRef) Retrieve the lock properties for the given NodeRef.
LockStatus	getLockStatus(org.alfresco.service.cmr.repository.NodeRef nodeRef) Gets the lock status for the node reference relative to the current user.
LockStatus	getLockStatus(org.alfresco.service.cmr.repository.NodeRef nodeRef, String userName) Gets the lock status for the node reference for the specified user.
LockType	getLockType(org.alfresco.service.cmr.repository.NodeRef nodeRef) Gets the lock type for the node indicated.
void	lock(Collection<org.alfresco.service.cmr.repository.NodeRef> nodeRefs, LockType lockType, int timeToExpire) Places a lock on all the nodes referenced in the passed list.
void	lock(org.alfresco.service.cmr.repository.NodeRef nodeRef, LockType lockType) Places a lock on a node.
void	lock(org.alfresco.service.cmr.repository.NodeRef nodeRef, LockType lockType, int timeToExpire) Places a persistent lock on a node.
void	lock(org.alfresco.service.cmr.repository.NodeRef nodeRef, LockType lockType, int timeToExpire, boolean lockChildren) Places a lock on a node and optionally on all its children.
void	lock(org.alfresco.service.cmr.repository.NodeRef nodeRef, LockType lockType, int timeToExpire, Lifetime lifetime) Places a lock on a node.
void	lock(org.alfresco.service.cmr.repository.NodeRef nodeRef, LockType lockType, int timeToExpire, Lifetime lifetime, String additionalInfo) Places a lock on a node.
void	suspendLocks() Allow the current transaction to update a node despite any locks that may be on it.
void	unlock(Collection<org.alfresco.service.cmr.repository.NodeRef> nodeRefs) Removes a lock on the nodes provided.
void	unlock(org.alfresco.service.cmr.repository.NodeRef nodeRef) Removes the lock on a node; if there is no lock then nothing is done.
void	unlock(org.alfresco.service.cmr.repository.NodeRef nodeRef, boolean lockChildren) Removes the lock on a node and optional on its children.
void	unlock(org.alfresco.service.cmr.repository.NodeRef nodeRef, boolean lockChildren, boolean allowCheckedOut) Removes the lock on a node and optional on its children.

Method Detail

lock

@Auditable(parameters={"nodeRef","lockType"})
void lock(org.alfresco.service.cmr.repository.NodeRef nodeRef,
                  LockType lockType)
          throws UnableToAquireLockException

Places a lock on a node.

The lock prevents any other user or process from comitting updates to the node until the lock is released.

The lock will be owned by the current user.

A lock made with this call will never expire.

Parameters:

nodeRef - a reference to a node

userName - a reference to the user that will own the lock

lockType - the lock type

Throws:

UnableToAquireLockException - thrown if the lock could not be obtained

lock

@Auditable(parameters={"nodeRef","lockType","timeToExpire"})
void lock(org.alfresco.service.cmr.repository.NodeRef nodeRef,
                  LockType lockType,
                  int timeToExpire)
          throws UnableToAquireLockException

Places a persistent lock on a node.

The lock prevents any other user or process from comitting updates to the node until the lock is released.

The lock will be owned by the current user.

If the time to expire is 0 then the lock will never expire. Otherwise the timeToExpire indicates the number of seconds before the lock expires. When a lock expires the lock is considered to have been released.

If the node is already locked and the user is the lock owner then the lock will be renewed with the passed timeToExpire.

Parameters:

nodeRef - a reference to a node

lockType - the lock type

timeToExpire - the number of seconds before the locks expires.

Throws:

UnableToAquireLockException - thrown if the lock could not be obtained

lock

@Auditable(parameters={"nodeRef","lockType","timeToExpire","lifetime"})
void lock(org.alfresco.service.cmr.repository.NodeRef nodeRef,
                  LockType lockType,
                  int timeToExpire,
                  Lifetime lifetime)
          throws UnableToAquireLockException

Places a lock on a node.

The lock prevents any other user or process from comitting updates to the node until the lock is released.

The lock will be owned by the current user.

If the time to expire is 0 then the lock will never expire. Otherwise the timeToExpire indicates the number of seconds before the lock expires. When a lock expires the lock is considered to have been released.

If the node is already locked and the user is the lock owner then the lock will be renewed with the passed timeToExpire.

Parameters:

nodeRef - a reference to a node

lockType - the lock type

timeToExpire - the number of seconds before the locks expires.

lifetime - allows persistent or ephemeral locks to be specified.

Throws:

UnableToAquireLockException - thrown if the lock could not be obtained

lock

@Auditable(parameters={"nodeRef","lockType","timeToExpire","lifetime"})
void lock(org.alfresco.service.cmr.repository.NodeRef nodeRef,
                  LockType lockType,
                  int timeToExpire,
                  Lifetime lifetime,
                  String additionalInfo)
          throws UnableToAquireLockException

Places a lock on a node.

The lock prevents any other user or process from comitting updates to the node until the lock is released.

The lock will be owned by the current user.

If the time to expire is 0 then the lock will never expire. Otherwise the timeToExpire indicates the number of seconds before the lock expires. When a lock expires the lock is considered to have been released.

If the node is already locked and the user is the lock owner then the lock will be renewed with the passed timeToExpire.

Parameters:

nodeRef - a reference to a node

lockType - the lock type

timeToExpire - the number of seconds before the locks expires.

lifetime - allows persistent or ephemeral locks to be specified.

additionalInfo - additional lock data stored alongside core lock data such as timeToExpire. NOTE: only valid for ephemeral locks.

Throws:

UnableToAquireLockException - thrown if the lock could not be obtained

lock

@Auditable(parameters={"nodeRef","lockType","timeToExpire","lockChildren"})
void lock(org.alfresco.service.cmr.repository.NodeRef nodeRef,
                  LockType lockType,
                  int timeToExpire,
                  boolean lockChildren)
          throws UnableToAquireLockException

Places a lock on a node and optionally on all its children.

The lock prevents any other user or process from comitting updates to the node until the lock is released.

The lock will be owned by the current user.

If any one of the child locks can not be taken then an exception will be raised and all locks canceled.

If the time to expire is 0 then the lock will never expire. Otherwise the timeToExpire indicates the number of seconds before the lock expires. When a lock expires the lock is considered to have been released.

If the node is already locked and the user is the lock owner then the lock will be renewed with the passed timeToExpire.

Parameters:

nodeRef - a reference to a node

lockType - the lock type

timeToExpire - the number of seconds before the locks expires.

lockChildren - if true indicates that all the children (and grandchildren, etc) of the node will also be locked, false otherwise

Throws:

UnableToAquireLockException - thrown if the lock could not be obtained

lock

@Auditable(parameters={"nodeRefs","lockType","timeToExpire"})
void lock(Collection<org.alfresco.service.cmr.repository.NodeRef> nodeRefs,
                  LockType lockType,
                  int timeToExpire)
          throws UnableToAquireLockException

Places a lock on all the nodes referenced in the passed list.

The lock prevents any other user or process from comitting updates to the node until the lock is released.

The lock will be owned by the current user.

If the time to expire is 0 then the lock will never expire. Otherwise the timeToExpire indicates the number of seconds before the lock expires. When a lock expires the lock is considered to have been released.

If the node is already locked and the current user is the lock owner then the lock will be renewed with the passed timeToExpire.

Parameters:

nodeRefs - a list of node references

lockType - the type of lock being created

timeToExpire - the number of seconds before the locks expires.

Throws:

UnableToAquireLockException - thrown if the lock could not be obtained

unlock

@Auditable(parameters="nodeRef")
void unlock(org.alfresco.service.cmr.repository.NodeRef nodeRef)
            throws UnableToReleaseLockException

Removes the lock on a node; if there is no lock then nothing is done.

The user must have sufficient permissions to remove the lock (ie: be the owner of the lock or have admin rights) and the node must not be checked out. Otherwise an exception will be raised.

Parameters:

nodeRef - a reference to a node

Throws:

UnableToReleaseLockException - thrown if the lock could not be released

unlock

@Auditable(parameters={"nodeRef","lockChildren"})
void unlock(org.alfresco.service.cmr.repository.NodeRef nodeRef,
                    boolean lockChildren)
            throws UnableToReleaseLockException

Removes the lock on a node and optional on its children.

The user must have sufficient permissions to remove the lock(s) (ie: be the owner of the lock(s) or have admin rights) and the node(s) must not be checked out. Otherwise an exception will be raised.

If one of the child nodes is not locked then it will be ignored and the process continue without error.

If the lock on any one of the child nodes cannot be released then an exception will be raised.

Parameters:

nodeRef - a node reference

lockChildren - if true then all the children (and grandchildren, etc) of the node will also be unlocked, false otherwise

Throws:

UnableToReleaseLockException - thrown if the lock could not be released

unlock

@Auditable(parameters={"nodeRef","lockChildren","allowCheckedOut"})
void unlock(org.alfresco.service.cmr.repository.NodeRef nodeRef,
                    boolean lockChildren,
                    boolean allowCheckedOut)
            throws UnableToReleaseLockException

Removes the lock on a node and optional on its children.

The user must have sufficient permissions to remove the lock(s) (ie: be the owner of the lock(s) or have admin rights) otherwise an exception will be raised.

If one of the child nodes is not locked then it will be ignored and the process continue without error.

If the lock on any one of the child nodes cannot be released then an exception will be raised.

Parameters:

nodeRef - a node reference

lockChildren - if true then all the children (and grandchildren, etc) of the node will also be unlocked, false otherwise

allowCheckedOut - is it permissable for a node to be a checked out node?

Throws:

UnableToReleaseLockException - thrown if the lock could not be released

unlock

@Auditable(parameters="nodeRefs")
void unlock(Collection<org.alfresco.service.cmr.repository.NodeRef> nodeRefs)
            throws UnableToReleaseLockException

Removes a lock on the nodes provided.

The user must have sufficient permissions to remove the locks (ie: be the owner of the locks or have admin rights) otherwise an exception will be raised.

If one of the nodes is not locked then it will be ignored and the process will continue without an error.

If the lock on any one of the nodes cannot be released than an exception will be raised and the process rolled back.

Parameters:

nodeRefs - the node references

userName - the user reference

Throws:

UnableToReleaseLockException - thrown if the lock could not be released

getLockStatus

@Auditable(parameters="nodeRef")
LockStatus getLockStatus(org.alfresco.service.cmr.repository.NodeRef nodeRef)

Gets the lock status for the node reference relative to the current user.

Parameters:

nodeRef - the node reference

Returns:

the lock status

See Also:

LockService#getLockStatus(NodeRef, NodeRef)

getLockStatus

@Auditable(parameters={"nodeRef","userName"})
LockStatus getLockStatus(org.alfresco.service.cmr.repository.NodeRef nodeRef,
                                 String userName)

Gets the lock status for the node reference for the specified user.

Parameters:

nodeRef - the node reference

userName - the user name

Returns:

the lock status

See Also:

LockService#getLockStatus(NodeRef, NodeRef)

getLockType

@Auditable(parameters="nodeRef")
LockType getLockType(org.alfresco.service.cmr.repository.NodeRef nodeRef)

Gets the lock type for the node indicated.

Returns null if the node is not locked.

Throws an exception if the node does not have the lock aspect.

Parameters:

nodeRef - the node reference

Returns:

the lock type, null is returned if the object in question has no lock

checkForLock

@Auditable(parameters="nodeRef")
void checkForLock(org.alfresco.service.cmr.repository.NodeRef nodeRef)

Checks to see if the current user has access to the specified node.

If the node is locked by another user then a NodeLockedException is thrown.

Gets the user reference from the current session.

Parameters:

nodeRef - the node reference

Throws:

NodeLockedException - thrown if the node is locked by someone else. This is based on the lock status of the lock, the user ref and the lock type.

suspendLocks

void suspendLocks()

Allow the current transaction to update a node despite any locks that may be on it.

Used for the system to be able to update locked nodes.

enableLocks

void enableLocks()

After calling suspendLocks turn the locks back on.

getAdditionalInfo

String getAdditionalInfo(org.alfresco.service.cmr.repository.NodeRef nodeRef)

Retrieve the additional lock info associated with a node ref.

Parameters:

nodeRef -

Returns:

Additional info string or null

getLockState

LockState getLockState(org.alfresco.service.cmr.repository.NodeRef nodeRef)

Retrieve the lock properties for the given NodeRef.

Do NOT use the returned information to determine the actual state of a lock, use getLockStatus(NodeRef) and other LockService methods for this purpose.

The returned data is intended for information purposes only, e.g. returning the timeout in a WebDAV response.

Parameters:

nodeRef -

Returns:

LockState