Icon class icon_class fas fa-quote-left icon_class_computed fas fa-quote-left Related content Source Unified Modeling Language 2.5.1 Copyright information About Object Management Group copyright in text extracts quoted from OMG specifications for educational purposes Snippet kind INFO UML keywords Activity CentralBufferNode token object token DataStoreNode Previous snippet Full quote 15.4.3.4 Data Store Nodes A DataStoreNode is a CentralBufferNode that holds its object tokens persistently while its activity is executing. Next snippet When an offer for an object token held by a DataStoreNode is accepted by a downstream object node, the offered token is removed from the DataStoreNode, per the usual CentralBufferNode semantics. However, a copy is made of the removed object token ... Related snippets 15.4.3.3 Central Buffer Nodes - A CentralBufferNode acts as a buffer between incoming ObjectFlows and outgoing ObjectFlows. It accepts all object tokens offered to it on all incoming flows, which are then held by the node. Related snippets (backlinks) ... a copy is made of the removed object token, with the same value, and this is immediately placed back onto the DataStoreNode. Thus, the values held by a DataStoreNode appear to persist for the duration of each execution of its containing activity, even When a DataStoreNode accepts an object token, if that token contains an object with the same identity as an object contained in a token already held by the node, then the duplicate object token shall not be placed on the DataStoreNode. Unlike a regular CentralBufferNode, a DataStoreNode contains objects uniquely. The selection and transformation Behaviors on outgoing ObjectFlows can be used to get information out of a DataStoreNode as if a query were being performed. Visit also Visit also (backlinks) Flags
