Tosca-Driven Java Model (tdjam) is a new feature that allows for implementation of control loops exclusively using the Java framework including the new actor model.
JIRA:
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High-Level Presentation: https://wiki.onap.org/download/attachments/84648019/ONAP%20ATT%20Policy%20Drools%20Guilin%20Contribution.pptx?api=v2
Deep-Dive Presentation: https://wikilf-onap.onapatlassian.orgnet/wiki/download/attachments/8464801916426095/TdjamDeepDive.pptx?api=v2
Deep-Dive Recording: <TBD> https://wiki.onap.org/download/attachments/84648019/ONAP%20Policy%20Guilin%20tdjam%20Deep%20Dive-20200519%201403-1.mp4?api=v2 (Recording password: 22vMTmdZ)
Overview
In order to streamline control loop operation, we are contributing a feature to allow for a pure Java based control loop implementation using the same TOSCA client created specification. This will achieve many benefits including:
- Remove reliance on Drools for TOSCA defined loops
- Improve performance and scalability
- Improve maintainability
- Avoid limitations of Drools including single-threaded nature and memory constraints
- Next generation of m1 and m2 predecessor models, building on our experience with those models
- Fully integrated with the new ONAP actor framework
- Transparent infrastructure change, no client impact
Design
Some design considerations include:
- Reducing/removing the use of frankfurt.drl for tdjam
- Refactoring/generalizing controller code to support Drools and non-Drools controllers
Next Steps
- Create Java layer to eliminate Drools entirely
- Develop tdjam layer on top of actor model
- Finalize deployment implementation
- Test extensively with server pool and tosca flow
- Test extensively with guards and CLC
- Update ONAP use cases to use new converged approach