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  1. UIMA
  2. UIMA-5280 UIMA-AS V3: Redesign to simplify embedding in applications
  3. UIMA-5500

UIMA-AS V3: Replace dd2spring with java based DD processing



    • Sub-task
    • Status: Open
    • Major
    • Resolution: Unresolved
    • None
    • 3.0.1AS
    • Async Scaleout
    • None


      Current UIMA-AS uses dd2spring to parse DD into intermediate format (Spring Context) which is than fed into Spring Framework to instantiate components of the UIMA-AS at runtime. The dd2spring uses saxon and custom xslt stylesheet to process a DD. The xslt is quite complex and difficult to maintain. The saxon library requires that the DD is provided as a fully qualified file preventing from loading it from a classpath or datapath.
      Instead of dd2spring, the UIMA-AS can use xmlbeans to parse the DD and instantiate on object model representing it. There already exists a schema for the DD in UIMA-AS from which an object model can be generated.
      New java only code can than use the model to create components necessary to deploy UIMA-AS service. The wiring of components will be done in java instead of relying on Spring which hides much of this process.
      The removal of dd2spring is largely an internal UIMA-AS concern and user code impact of this change should be minimal. The user no longer will have to specify Saxon nor the dd2springXsltFilePath when launching or deploying a service.




            cwiklik Jaroslaw Cwiklik
            cwiklik Jaroslaw Cwiklik
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