org.openorb.ccs.kernel
Class TransactionalLockSet

java.lang.Object
  org.omg.PortableServer.Servant
      org.omg.CosConcurrencyControl.TransactionalLockSetPOA
          org.openorb.ccs.kernel.TransactionalLockSet

All Implemented Interfaces:

org.omg.CORBA.portable.InvokeHandler, TransactionalLockSetOperations

public class TransactionalLockSet
extends TransactionalLockSetPOA

This class provides operations to acquire and release locks on behalf a specific transaction Each transaction lock set will be related to the coordinator of a transaction

Author:

Marina Daniel

Constructor Summary

TransactionalLockSet()

Method Summary

void	change_mode(org.omg.CosTransactions.Coordinator current, lock_mode held_mode, lock_mode new_mode) Changes the mode of a single lock for a specific transaction.
LockCoordinator	get_coordinator(org.omg.CosTransactions.Coordinator which) returns the lock coordinator associated with the specified transaction
boolean	isLockable(lock_mode mode) return whether the current lock mode permits the required lock mode
void	lock(org.omg.CosTransactions.Coordinator current, lock_mode mode) Acquires a lock in the specified mode for a specific transaction
void	setRelatedLockSet(TransactionalLockSet relatedLockSet) sets the related lock set
void	storeRolledBackedTransactions(org.omg.CosTransactions.Coordinator current) stores the rolledBacked transactions, since they cannot be locked again
boolean	try_lock(org.omg.CosTransactions.Coordinator current, lock_mode mode) Attempts to acquire a lock on the specified lock set for a specific transaction.
void	unlock(org.omg.CosTransactions.Coordinator current, lock_mode mode) Drops a single lock on the specified lock set in the specified mode for a specific transaction.
void	unlockAll(org.omg.CosTransactions.Coordinator current) drop all locks held by the specified transaction

Methods inherited from class org.omg.CosConcurrencyControl.TransactionalLockSetPOA

_all_interfaces, _invoke, _this, _this

Methods inherited from class org.omg.PortableServer.Servant

_default_POA, _get_delegate, _get_interface_def, _is_a, _non_existent, _object_id, _orb, _poa, _set_delegate, _this_object, _this_object

Methods inherited from class java.lang.Object

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

Constructor Detail

TransactionalLockSet

public TransactionalLockSet()

Method Detail

lock

public void lock(org.omg.CosTransactions.Coordinator current,
                 lock_mode mode)

Acquires a lock in the specified mode for a specific transaction

Parameters:

current - the reference to the coordinator of the transaction

mode - the specified mode

try_lock

public boolean try_lock(org.omg.CosTransactions.Coordinator current,
                        lock_mode mode)

Attempts to acquire a lock on the specified lock set for a specific transaction.

Parameters:

current - The reference to the coordinator of the transaction.

mode - The lock mode.

Returns:

True whether the lock was successful, false otherwise.

unlock

public void unlock(org.omg.CosTransactions.Coordinator current,
                   lock_mode mode)
            throws LockNotHeld

Drops a single lock on the specified lock set in the specified mode for a specific transaction.

Parameters:

current - The reference to the coordinator of the transaction.

mode - The lock mode.

Throws:

LockNotHeld - If called on a lock that is not held.

change_mode

public void change_mode(org.omg.CosTransactions.Coordinator current,
                        lock_mode held_mode,
                        lock_mode new_mode)
                 throws LockNotHeld

Changes the mode of a single lock for a specific transaction.

Parameters:

current - The reference to the coordinator of the transaction.

held_mode - The current held mode.

new_mode - The new mode.

Throws:

LockNotHeld - When no lock is held.

get_coordinator

public LockCoordinator get_coordinator(org.omg.CosTransactions.Coordinator which)

returns the lock coordinator associated with the specified transaction

Parameters:

which - the reference to the coordinator of the transaction

Returns:

the lock coordinator

unlockAll

public void unlockAll(org.omg.CosTransactions.Coordinator current)

drop all locks held by the specified transaction

Parameters:

current - the reference to the coordinator of the transaction

isLockable

public boolean isLockable(lock_mode mode)

return whether the current lock mode permits the required lock mode

Parameters:

mode - the required lock mode

Returns:

true if the lock set can be locked to this mode

setRelatedLockSet

public void setRelatedLockSet(TransactionalLockSet relatedLockSet)

sets the related lock set

Parameters:

relatedLockSet - the related lock set

storeRolledBackedTransactions

public void storeRolledBackedTransactions(org.omg.CosTransactions.Coordinator current)

stores the rolledBacked transactions, since they cannot be locked again

Parameters:

current - the reference to the coordinator of the transaction