org.mmbase.bridge

Interface Transaction

All Superinterfaces:

Cloud

All Known Implementing Classes:

BasicTransaction, MockTransaction, RemoteTransaction_Proxy

public interface Transaction
extends Cloud

A transaction is an environment that allows for the editing of nodes within a 'safe' context. Either all edits in a transaction are comitted, or all fail. A transaction acts as a cloud. All that can be done in a cloud can be done in a transaction. For example a node retrieved using the transaction's getNode method resides in the transaction, if you change or remove the node, you can later roll it back by calling the transaction's cancel method.

Version:

$Id$

Author:

Pierre van Rooden

Field Summary

Fields inherited from interface org.mmbase.bridge.Cloud

PROP_IGNOREVALIDATION, PROP_REQUEST, PROP_RESPONSE, PROP_SESSIONNAME, PROP_XMLMODE

Method Summary

Modifier and Type	Method and Description
void	cancel() Cancels this transaction.
boolean	commit() Commits this transaction.
String	getCloudName() Returns the name of the cloud this transaction uses
NodeList	getNodes()
boolean	isCanceled() Returns whether the transaction is canceled
boolean	isCommitted() Returns whether the transaction is committed

Methods inherited from interface org.mmbase.bridge.Cloud

createAggregatedQuery, createNodeList, createNodeManagerList, createNodeQuery, createQuery, createRelationList, createRelationManagerList, createTransaction, createTransaction, createTransaction, getCloudContext, getDescription, getFunction, getFunctions, getList, getList, getLocale, getName, getNode, getNode, getNodeByAlias, getNodeManager, getNodeManager, getNodeManagers, getNonTransactionalCloud, getPossibleContexts, getProperties, getProperty, getRelation, getRelation, getRelationManager, getRelationManager, getRelationManager, getRelationManager, getRelationManagers, getRelationManagers, getRelationManagers, getTransaction, getUser, hasNode, hasNode, hasNodeManager, hasRelation, hasRelation, hasRelationManager, hasRelationManager, hasRelationManager, hasRole, may, mayRead, mayRead, setLocale, setProperty, shutdown

Method Detail

commit

boolean commit()

Commits this transaction. This has no effect if the transaction itself was 'nested' in another transaction. In that case, nothing happens until the 'outer' transaction commits. This routine also removes the transaction as an 'active' transaction (it cannot be opened again).

Returns:

true if the commit succeeded, false otherwise

cancel

void cancel()

Cancels this transaction. If the transaction itself was 'nested' in another transaction, that 'outer' transaction is also canceled. This routine also removes the transaction (and all outer transactions) as an 'active' transaction (it cannot be opened again).

isCommitted

boolean isCommitted()

Returns whether the transaction is committed

Returns:

true when committed

Since:

MMBase-1.8

isCanceled

boolean isCanceled()

Returns whether the transaction is canceled

Returns:

true when canceled

Since:

MMBase-1.8

getNodes

NodeList getNodes()

Since:

MMBase-1.9

getCloudName

String getCloudName()

Returns the name of the cloud this transaction uses

Returns:

the name of the cloud

Since:

MMBase-1.8