685531 SzGeCERN 20230314180600.0 oai:cds.cern.ch:685531 cerncds:FULLTEXT cerncds:CERN:FULLTEXT cerncds:CERN SPIRES 5582946 WAI01 000011974 Inspire 621340 arXiv cs/0306089 cs.SE CHEP-2003-MOJT008 ATL-SOFT-2003-009 eng ATL-SOFT-2003-009 ATL-COM-SOFT-2003-010 CERN-ATL-SOFT-2003-009 cs/0306089 Calafiura, P. INSPIRE-00070566 LBL, Berkeley The StoreGate: a Data Model for the Atlas Software Architecture A TOROIDAL LHC APPARATUS 2003 Berkeley, CA Lawrence Berkeley Nat. Lab. 14 Jun 2003 4 p arXiv The Atlas collaboration at CERN has adopted the Gaudi software architecture which belongs to the blackboard family: data objects produced by knowledge sources (e.g. reconstruction modules) are posted to a common in-memory data base from where other modules can access them and produce new data objects. The StoreGate has been designed, based on the Atlas requirements and the experience of other HENP systems such as Babar, CDF, CLEO, D0 and LHCB, to identify in a simple and efficient fashion (collections of) data objects based on their type and/or the modules which posted them to the Transient Data Store (the blackboard). The developer also has the freedom to use her preferred key class to uniquely identify a data object according to any other criterion. Besides this core functionality, the StoreGate provides the developers with a powerful interface to handle in a coherent fashion persistable references, object lifetimes, memory management and access control policy for the data objects in the Store. It also provides a Handle/Proxy mechanism to define and hide the cache fault mechanism: upon request, a missing Data Object can be transparently created and added to the Transient Store presumably retrieving it from a persistent data-base, or even reconstructing it on demand. arXiv The Atlas collaboration at CERN has adopted the Gaudi software architecture which belongs to the blackboard family: data objects produced by knowledge sources (e.g. reconstruction modules) are posted to a common in-memory data base from where other modules can access them and produce new data objects. The StoreGate has been designed, based on the Atlas requirements and the experience of other HENP systems such as Babar, CDF, CLEO, D0 and LHCB, to identify in a simple and efficient fashion (collections of) data objects based on their type and/or the modules which posted them to the Transient Data Store (the blackboard). The developer also has the freedom to use her preferred key class to uniquely identify a data object according to any other criterion. Besides this core functionality, the StoreGate provides the developers with a powerful interface to handle in a coherent fashion persistable references, object lifetimes, memory management and access control policy for the data objects in the Store. It also provides a Handle/Proxy mechanism to define and hide the cache fault mechanism: upon request, a missing Data Object can be transparently created and added to the Transient Store presumably retrieving it from a persistent data-base, or even reconstructing it on demand. CC-BY-4.0 Preprint PUB CDS LANL EDS SIS ATLAS2003 SIS CERN EDS SzGeCERN Computing and Computers SzGeCERN Detectors and Experimental Techniques SzGeCERN Software CERN Athena CERN Gaudi CERN architecture CERN blackboard CERN Internal Note INTNOTEATLASPUBL INTNOTE PUBLATLAS CERN CERN LHC ATLAS LANL EDS Software Engineering ACM-class: D.2.11 LANL EDS Computer Science Software Engineering cs.SE Leggett, C.G. INSPIRE-00100895 LBL, Berkeley Quarrie, D.R. INSPIRE-00222245 LBL, Berkeley Ma, H. Brookhaven Rajagopalan, S. INSPIRE-00222308 Brookhaven EP CHEP 2003 Computing in High Energy Physics MOJT008 eConf C0303241 C03-03-24.1 2003 http://weblib.cern.ch/abstract?ATL-SOFT-2003-009 http://www.slac.stanford.edu/econf/C0303241/proc/papers/MOJT008.PDF Proceedings write-up on eConf 2434593 97669 http://cds.cern.ch/record/685531/files/arXiv:cs_0306089.pdf 1187511 81950 http://cds.cern.ch/record/685531/files/MOJT008.PDF Published version 1259922 104561 http://cds.cern.ch/record/685531/files/abstract.htm ATLAS 15999 141734 http://cds.cern.ch/record/685531/files/soft-2003-009.pdf Access to fulltext 15999 1610273 http://cds.cern.ch/record/685531/files/soft-2003-009.ps Access to fulltext 15999 33804 http://cds.cern.ch/record/685531/files/soft-2003-009.ps.gz Access to fulltext pcalafiura@lbl.gov n 200325 13 20110218 1649 CER01 20031121 597895 MOJT008 lajolla20030324 PUBLIC 002411914CER INTNOTEATLASPUBL NOTE ARTICLE ConferencePaper