com.hp.hpl.jena.graph
Interface TransactionHandler

All Known Implementing Classes:

BaseInfGraph.InfTransactionHandler, com.hp.hpl.jena.graph.impl.TransactionHandlerBase

public interface TransactionHandler

Preliminary interface for graphs supporting transactions.

Author:

kers

Method Summary

void	abort() If transactions are supported and there is a tranaction in progress, abort it.
void	begin() If transactions are supported, begin a new transaction.
void	commit() If transactions are supported and there is a tranaction in progress, commit it.
Object	executeInTransaction(Command c) If transactions are supported, execute the command c within a transaction and return its result.
boolean	transactionsSupported() Does this handler support transactions at all?

Method Detail

transactionsSupported

boolean transactionsSupported()

Does this handler support transactions at all?

Returns:

true iff begin/abort/commit are implemented and make sense.

begin

void begin()

If transactions are supported, begin a new transaction. If tranactions are not supported, or they are but this tranaction is nested and nested transactions are not supported, throw an UnsupportedOperationException.

abort

void abort()

If transactions are supported and there is a tranaction in progress, abort it. If transactions are not supported, or there is no transaction in progress, throw an UnsupportedOperationException.

commit

void commit()

If transactions are supported and there is a tranaction in progress, commit it. If transactions are not supported, , or there is no transaction in progress, throw an UnsupportedOperationException.

executeInTransaction

Object executeInTransaction(Command c)

If transactions are supported, execute the command c within a transaction and return its result. If not, throw an UnsupportedOperationException.