Package com.nomagic.uml2.transaction

Interface TransactionManager

public interface TransactionManager

Transaction provides framework to keep consistent model after model modification. All model modifications during transaction is recorded and later these modifications are verified to check if they do not break model integrity.

Model verification and fixing must be implemented outside, and hooks must be passed to transaction.

Transaction can be read only - during such transaction no model modifications are allowed and any of model modification throws ReadOnlyModelException

Transaction managers offers three ways to attach the listeners.
1. Synchronize model changes - see addTransactionCommitListenerForExecute(TransactionCommitListener)
2. "Pseudo" synchronize model changes - see addTransactionCommitListener(TransactionCommitListener)
3. Regular transaction commit - see addTransactionCommitListenerIncludingUndoAndRedo(TransactionCommitListener).

Nested Class Summary

Nested Classes

Modifier and Type	Interface	Description
static class	TransactionManager.TransactionOptions	Transaction options.

Method Summary

Modifier and Type	Method	Description
void	addNotDeliveredEventsListener(TransactionCommitListener listener)	Adds transaction commit listener which will be invoked if event delivery is turned off.
void	addTransactionCommitListener(TransactionCommitListener listener)	Adds transaction commit listener which will be invoked on first command execution or on direct transaction execution (not called on command/session undo/redo).
void	addTransactionCommitListenerForExecute(TransactionCommitListener listener)	Adds transaction commit listener which will be invoked only on the first command/session execution (not called on command/session undo/redo nor direct transaction execution).
void	addTransactionCommitListenerIncludingUndoAndRedo(TransactionCommitListener listener)	Adds transaction commit listener which will be invoked on command/session execution/undo/redo or direct transaction execution.
void	commit()	Commits transaction.
void	commitExecute()	Commits transaction during execute operation.
void	commitUndoOrRedo()	Commits transaction during undo or redo operation.
void	executeInTransaction(Runnable r, TransactionManager.TransactionOptions options)	Runs given code in new transaction by calling commitExecute() If transaction is not yet started, then starts a new, runs the code, and commits the transaction.
Collection<TransactionCommitListener>	getListeners()
ModelValidator	getModelValidator()	Get validation hook which validates model integrity.
boolean	isStarted()
void	removeTransactionCommitListener(TransactionCommitListener listener)	Removes listener from transaction commit listeners.
void	runInTransaction(Runnable r, TransactionManager.TransactionOptions options)	Runs given code in a transaction.
void	runTransaction(Runnable r)	Runs given code in new transaction by calling commit()
void	runTransaction(Runnable r, TransactionManager.TransactionOptions options)	Runs given code in new transaction by calling commit()
void	setInvalidModelHandler(InvalidModelHandler handler)	Sets handler which fixes model with verification errors.
void	setModelValidator(ModelValidator validator)	Sets validation hook which validates model integrity.
void	start()	Starts transaction.
void	start(TransactionManager.TransactionOptions options)	Starts with given options.

Method Details

runTransaction

void runTransaction(Runnable r,
 TransactionManager.TransactionOptions options)
             throws RollbackException,
TransactionAlreadyStartedException

Runs given code in new transaction by calling commit()

Parameters:

r - code to run.

options - transaction options to run

Throws:

RollbackException - when model verification fails, and InvalidModelHandler

TransactionAlreadyStartedException - when transaction already running

runTransaction

void runTransaction(Runnable r)
             throws RollbackException,
TransactionAlreadyStartedException

Runs given code in new transaction by calling commit()

Parameters:

r - code to run

Throws:

RollbackException - when model verification fails, and InvalidModelHandler

TransactionAlreadyStartedException - If currently transaction is running

executeInTransaction

void executeInTransaction(Runnable r,
 TransactionManager.TransactionOptions options)
                   throws RollbackException

Runs given code in new transaction by calling commitExecute() If transaction is not yet started, then starts a new, runs the code, and commits the transaction. If transaction is already started then simply runs the code.

Parameters:

r - code to run.

options - transaction options to run

Throws:

RollbackException - when model verification fails, and InvalidModelHandler

runInTransaction

void runInTransaction(Runnable r,
 TransactionManager.TransactionOptions options)
               throws RollbackException

Runs given code in a transaction. If transaction is not yet started, then starts a new, runs the code, and commits the transaction. If transaction is already started then simply runs the code.

Parameters:

r - code to run.

options - transaction options to run

Throws:

RollbackException - when model verification fails, and InvalidModelHandler

start

void start()
    throws TransactionAlreadyStartedException

Starts transaction. Any model modification after transaction is started is recorded.

Throws:

TransactionAlreadyStartedException - when there is running transaction

isStarted

boolean isStarted()

Returns:

true if transaction is started

commit

void commit()
     throws RollbackException,
TransactionAlreadyCommitedException

Commits transaction. During commit, model is verified and in case verification failed model is fixed. If the only one fix is to rollback model to previous state which was before transaction RollbackException is thrown

Throws:

RollbackException - when transaction validation fails, and there is no way to fix model except undoing last action

TransactionAlreadyCommitedException - when transaction is not started

commitUndoOrRedo

void commitUndoOrRedo()
               throws RollbackException,
TransactionAlreadyCommitedException

Commits transaction during undo or redo operation.

Throws:

RollbackException

TransactionAlreadyCommitedException

See Also:

• commit()

commitExecute

void commitExecute()
            throws RollbackException,
TransactionAlreadyCommitedException

Commits transaction during execute operation.

Throws:

RollbackException

TransactionAlreadyCommitedException

See Also:

• commit()

start

void start(TransactionManager.TransactionOptions options)
    throws TransactionAlreadyStartedException

Starts with given options. If transaction is read only any model modification after transaction is started throws ReadOnlyModelException

If transaction

Read only transactions are deprecated - normally queries on model can be done without transaction, and all modifications must be done through transaction.

Parameters:

options - transaction options

Throws:

TransactionAlreadyStartedException - if transaction is already started

setInvalidModelHandler

void setInvalidModelHandler(InvalidModelHandler handler)

Sets handler which fixes model with verification errors.

Parameters:

handler - handler which fixes model

setModelValidator

void setModelValidator(ModelValidator validator)

Sets validation hook which validates model integrity.

Parameters:

validator - which validates model integrity

getModelValidator

ModelValidator getModelValidator()

Get validation hook which validates model integrity.

Returns:

validator which validates model integrity

addTransactionCommitListener

void addTransactionCommitListener(TransactionCommitListener listener)

Adds transaction commit listener which will be invoked on first command execution or on direct transaction execution (not called on command/session undo/redo).

Parameters:

listener - listener to add

addTransactionCommitListenerIncludingUndoAndRedo

void addTransactionCommitListenerIncludingUndoAndRedo(TransactionCommitListener listener)

Adds transaction commit listener which will be invoked on command/session execution/undo/redo or direct transaction execution.

Parameters:

listener - listener

addTransactionCommitListenerForExecute

void addTransactionCommitListenerForExecute(TransactionCommitListener listener)

Adds transaction commit listener which will be invoked only on the first command/session execution (not called on command/session undo/redo nor direct transaction execution).

Parameters:

listener - listener

addNotDeliveredEventsListener

void addNotDeliveredEventsListener(TransactionCommitListener listener)

Adds transaction commit listener which will be invoked if event delivery is turned off. Usual transaction listeners will be not notified about such events.

Parameters:

listener - which is notified for events happened only when event delivery was turned off. Notification is done on event delivery restore.

removeTransactionCommitListener

void removeTransactionCommitListener(TransactionCommitListener listener)

Removes listener from transaction commit listeners.

Parameters:

listener - listener to remove

getListeners

Collection<TransactionCommitListener> getListeners()

Returns:

all registered transaction commit listeners.