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Converter provides translation between the transient representation to the persistent representation and back again. Converters are part of the persistency service.
Service
Tool
Fermi's Use of Gaudi
Started in 2000 as part of our upgrade of the simulation and reconstruction software named Gleam, now often referred to as GlastRelease. See this diagram from our online workbook.
Gaudi Provides Services/Tools Fermi Uses
ChronoSvc - monitors the cpu usage for all algorithms and provides a report at the end of the job.
JobOptionsSvc - Handles ASCII jobOptions files which allow setting of runtime parameters for all algorithm, services, tools, etc as well as determining the sequence of execution. Allows for conditional execution based on user-defined conditions.
MessageSvc - provides logging at prescribed "levels": DEBUG, INFO, WARNING, ERROR
Fermi-defined servies and algorithms
G4Generator - Algorithm that is our interface to Geant4. G4 generates one event, and the resulting data are then posted to the TDS.
Detector Description
Calibrations
ntupleWriterSvc - rather than utilize Gaudi's historgram service we chose to write our own. Over the years it has been extended to handle not only writing our outupt ROOT ntuples, but also provides a mechanism to read in ntuples for reprocessing.