org.hibernate
Class LockOptions

java.lang.Object
  extended by org.hibernate.LockOptions
All Implemented Interfaces:
Serializable

public class LockOptions
extends Object
implements Serializable

Contains locking details (LockMode, Timeout and Scope).

See Also:
Serialized Form

Field Summary
static int NO_WAIT
          Indicates that the database should not wait at all to acquire the pessimistic lock.
static LockOptions NONE
          NONE represents LockMode.NONE (timeout + scope do not apply)
static LockOptions READ
          READ represents LockMode.READ (timeout + scope do not apply)
static LockOptions UPGRADE
          UPGRADE represents LockMode.UPGRADE (will wait forever for lock and scope of false meaning only entity is locked)
static int WAIT_FOREVER
          Indicates that there is no timeout for the acquisition.
 
Constructor Summary
LockOptions()
           
LockOptions(LockMode lockMode)
           
 
Method Summary
static LockOptions copy(LockOptions source, LockOptions destination)
          Perform a shallow copy
 LockMode findGreatestLockMode()
          Currently needed for follow-on locking
 int getAliasLockCount()
          Get the number of aliases that have specific lock modes defined.
 Iterator getAliasLockIterator()
          Iterator for accessing Alias (key) and LockMode (value) as Map.Entry
 LockMode getAliasSpecificLockMode(String alias)
          Get the LockMode explicitly specified for the given alias via setAliasSpecificLockMode(java.lang.String, org.hibernate.LockMode)

Differs from getEffectiveLockMode(java.lang.String) in that here we only return explicitly specified alias-specific lock modes.

 LockMode getEffectiveLockMode(String alias)
          Determine the LockMode to apply to the given alias.
 LockMode getLockMode()
          Retrieve the overall lock mode in effect for this set of options.
 boolean getScope()
          Retrieve the current lock scope setting.
 int getTimeOut()
          Retrieve the current timeout setting.
 boolean hasAliasSpecificLockModes()
           
 LockOptions makeCopy()
           
 LockOptions setAliasSpecificLockMode(String alias, LockMode lockMode)
          Specify the LockMode to be used for a specific query alias.
 LockOptions setLockMode(LockMode lockMode)
          Set the overall LockMode to be used.
 LockOptions setScope(boolean scope)
          Set the cope.
 LockOptions setTimeOut(int timeout)
          Set the timeout setting.
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 

Field Detail

NONE

public static final LockOptions NONE
NONE represents LockMode.NONE (timeout + scope do not apply)


READ

public static final LockOptions READ
READ represents LockMode.READ (timeout + scope do not apply)


UPGRADE

public static final LockOptions UPGRADE
UPGRADE represents LockMode.UPGRADE (will wait forever for lock and scope of false meaning only entity is locked)


NO_WAIT

public static final int NO_WAIT
Indicates that the database should not wait at all to acquire the pessimistic lock.

See Also:
getTimeOut(), Constant Field Values

WAIT_FOREVER

public static final int WAIT_FOREVER
Indicates that there is no timeout for the acquisition.

See Also:
getTimeOut(), Constant Field Values
Constructor Detail

LockOptions

public LockOptions()

LockOptions

public LockOptions(LockMode lockMode)
Method Detail

getLockMode

public LockMode getLockMode()
Retrieve the overall lock mode in effect for this set of options.

In certain contexts (hql and criteria), lock-modes can be defined in an even more granular per-alias fashion

Returns:
The overall lock mode.

setLockMode

public LockOptions setLockMode(LockMode lockMode)
Set the overall LockMode to be used. The default is LockMode.NONE

Parameters:
lockMode - The new overall lock mode to use.
Returns:
this (for method chaining).

setAliasSpecificLockMode

public LockOptions setAliasSpecificLockMode(String alias,
                                            LockMode lockMode)
Specify the LockMode to be used for a specific query alias.

Parameters:
alias - used to reference the LockMode.
lockMode - The lock mode to apply to the given alias
Returns:
this LockRequest instance for operation chaining.
See Also:
Query.setLockMode(String, LockMode), Criteria.setLockMode(LockMode), Criteria.setLockMode(String, LockMode)

getAliasSpecificLockMode

public LockMode getAliasSpecificLockMode(String alias)
Get the LockMode explicitly specified for the given alias via setAliasSpecificLockMode(java.lang.String, org.hibernate.LockMode)

Differs from getEffectiveLockMode(java.lang.String) in that here we only return explicitly specified alias-specific lock modes.

Parameters:
alias - The alias for which to locate the explicit lock mode.
Returns:
The explicit lock mode for that alias.

getEffectiveLockMode

public LockMode getEffectiveLockMode(String alias)
Determine the LockMode to apply to the given alias. If no mode was explicitly set, the overall mode is returned. If the overall lock mode is null as well, LockMode.NONE is returned.

Differs from getAliasSpecificLockMode(java.lang.String) in that here we fallback to we only return the overall lock mode.

Parameters:
alias - The alias for which to locate the effective lock mode.
Returns:
The effective lock mode.

hasAliasSpecificLockModes

public boolean hasAliasSpecificLockModes()

getAliasLockCount

public int getAliasLockCount()
Get the number of aliases that have specific lock modes defined.

Returns:
the number of explicitly defined alias lock modes.

getAliasLockIterator

public Iterator getAliasLockIterator()
Iterator for accessing Alias (key) and LockMode (value) as Map.Entry

Returns:
Iterator for accessing the Map.Entry's

findGreatestLockMode

public LockMode findGreatestLockMode()
Currently needed for follow-on locking

Returns:
The greatest of all requested lock modes.

getTimeOut

public int getTimeOut()
Retrieve the current timeout setting.

The timeout is the amount of time, in milliseconds, we should instruct the database to wait for any requested pessimistic lock acquisition.

NO_WAIT and WAIT_FOREVER represent 2 "magic" values.

Returns:
timeout in milliseconds, or NO_WAIT or WAIT_FOREVER

setTimeOut

public LockOptions setTimeOut(int timeout)
Set the timeout setting.

See getTimeOut() for a discussion of meaning.

Parameters:
timeout - The new timeout setting.
Returns:
this (for method chaining).
See Also:
getTimeOut()

getScope

public boolean getScope()
Retrieve the current lock scope setting.

"scope" is a JPA defined term. It is basically a cascading of the lock to associations.

Returns:
true if locking will be extended to owned associations

setScope

public LockOptions setScope(boolean scope)
Set the cope.

Parameters:
scope - The new scope setting
Returns:
this (for method chaining).

copy

public static LockOptions copy(LockOptions source,
                               LockOptions destination)
Perform a shallow copy

Parameters:
source - Source for the copy (copied from)
destination - Destination for the copy (copied to)
Returns:
destination

makeCopy

public LockOptions makeCopy()


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