org.openanzo.model.transaction
Interface ITransactionGraph

All Superinterfaces:

INamedGraph

All Known Implementing Classes:

TransactionNamedGraphProxy

public interface ITransactionGraph
extends INamedGraph

ITransactionGraph is a graph whose transactions are handled by a transaction queue. These functions are encapsulated by an enhanced TransactionHandler, an ITransactionQueueManager.

Author:

Matthew Roy ( mroy@cambridgesemantics.com )

Method Summary

boolean	commitTransactionQueue() Commit the transaction queue.
ITransactionQueueManager	getTransactionQueueManager() Get the ITransactionQueueManager for this graph.
boolean	processTransactions(java.util.List<ITransaction> queue) Process a list of transactions, most commonly from another ITransactionGraph.
void	redo() Redo the last command in the current transaction.
void	undo() Undo the last command in the current transaction.

Methods inherited from interface org.openanzo.model.INamedGraph

add, add, add, clear, close, contains, contains, delete, delete, delete, find, getEventManager, getNamedGraphUri, getStatements, getTransactionManager, isClosed, isEmpty, setNamedGraphUri, size

Method Detail

getTransactionQueueManager

ITransactionQueueManager getTransactionQueueManager()

Get the ITransactionQueueManager for this graph.

Returns:

the ITransactionQueueManager for this graph.

processTransactions

boolean processTransactions(java.util.List<ITransaction> queue)

Process a list of transactions, most commonly from another ITransactionGraph. Useful when applying transactions from different graph types in order to filter or transform the format of the triples from one graph to another.

Parameters:

queue - List of transactions to apply to local queue.

Returns:

Whether or not processing of list was successful.

commitTransactionQueue

boolean commitTransactionQueue()
                               throws java.lang.Throwable

Commit the transaction queue.

Returns:

if committing was successful

Throws:

java.lang.Throwable

undo

void undo()
          throws AnzoException

Undo the last command in the current transaction.

Throws:

AnzoException - if there was an error undoing last command on graph

redo

void redo()
          throws AnzoException

Redo the last command in the current transaction.

Throws:

AnzoException - if there was an error undoing last command on graph