Refer to Technologies 104 of

https://wiki.onap.org/display/DW/TOSCA+based+Control+Loops+with+the+existing+CLAMP+code+in+the+Policy+Framework

Policy Models, integrated serialization and persistence for most TOSCA entities CLAMP TOSCA handling (more info) TOSCA Handling Policy Models, integrated serialization and persistence for most TOSCA entities CLAMP TOSCA handling (more info) Separate study ongoing in the Policy Framework on this
We should try and get this framework on Spring, which would enable further merging

Also, the following points should be considered (Potential Issues noticed back in March):

• Service Template update does not seem to work correctly. While the method does run, it does not change any of the values in the database, but returning a good response, seemingly doing nothing.
• Get Service templates works even when the service template name and version don't match. 
• Delete Service Template also deletes the service template present in the DB even if the service template name and version don't match, i.e. works even when you input anything else which doesn't even match the default values that the service template was created with.

Include the suggestions and approach for using Spring with the existing DAO approach using eclipselink.

• A trial of using Spring with the existing Dao and Eclipselink underway for Istanbul, Kevin Timoney from Policy Framework group will build and test using the policy-api component

Also check the TOSCA version (1.3?) a.sreekumar