Richard Eckart de Castilho wrote: > Hello everybody, > > recently the question of replacing all our CasConsumers with > AnalysisEngines comes up quite frequently and the potential myth that > CasCosumers should no longer be used and instead AnalysisEngines > should be preferred crops up every once in a while. I tried finding a > definitive information about this in the mailing list archives, but I > did not. > > In 2007 Adam Lally stated: > >> In recent versions of UIMA there is essentially no difference between >> an AnalysisEngine and a CasConsumer > > I think at least in CPEs it makes a difference, since with the first > CasConsumer the CPE supposed to be run in a single thread, so the > CasConsumer sees all the documents. The CPE, however, is afaik > deprecated and replaced by UIMA AS. > > If an AnalysisEngine has "allow multiple deployment" set to "false", > that should have the same affect within a CPE or within UIMA AS. > > So the questions are: > > - Is there any reason why CasConsumers are still required? > > - Is there any reason that a CasConsumer cannot be replaced "as is" > (minus inheriting from a different base class and changing the > descriptor type) by an AnalysisEngine that may not be deployed multiply?
I think this is basically correct. The one thing I'm not completely sure of because I haven't checked (:-) ) is whether calling something a Cas Consumer moves the component in the default flow to the end of the pipe line, in a CPE. In UIMA-AS, it doesn't, I think.. -Marshall > > Best regards, > > Richard Eckart de Castilho >
