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 breaks 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

Nested Class Summary

Nested Classes

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

Method Summary

Modifier and Type	Method and Description
void	addTransactionCommitListener(TransactionCommitListener listener) Adds new listener to listen transaction commits (post commits) events.
void	commit() Stops transaction.
java.util.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	runTransaction(java.lang.Runnable r) Runs given code in new transaction.
void	runTransaction(java.lang.Runnable r, TransactionManager.TransactionOptions options) Runs given code in new transaction.
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 Detail

runTransaction

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

Runs given code in new transaction.

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(java.lang.Runnable r)
             throws RollbackException,
                    TransactionAlreadyStartedException

Runs given code in new transaction. If currently transaction is running TransactionAlreadyStartedException is thrown.

Parameters:

r - code to run.

Throws:

RollbackException - when model verification fails, and InvalidModelHandler

TransactionAlreadyStartedException - If currently transaction is running.

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

Stops transaction. During stop, 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.

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

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 new listener to listen transaction commits (post commits) events.

Parameters:

listener - listener to add.

removeTransactionCommitListener

void removeTransactionCommitListener(TransactionCommitListener listener)

Removes listener from transaction commit listeners.

Parameters:

listener - listener to remove.

getListeners

java.util.Collection<TransactionCommitListener> getListeners()

Returns:

transaction commit listeners.