Santosh kumar created OLINGO-1034:

             Summary: Provide Call backs for CRUD operations
                 Key: OLINGO-1034
             Project: Olingo
          Issue Type: New Feature
          Components: odata2-core, odata2-jpa
    Affects Versions: V2 2.0.7
            Reporter: Santosh kumar

OData V2.0.7 doesn't have exit points for CRUD operations on Entities. Instead 
of exit points Olingo supports extending its API class 
{{ODataJPAProcessorDefault}} for any custom CRUD operation. The drawback of 
this approach is that the developer has to duplicate all the operations even if 
only {{readEntity}} has to be customized. Also any modification to the request 
parameters of these operations will require re-writing the Olingo code again. 

The proposal is to introduce a call back mechanism(similar to existing debug 
call back) which allows the developer to introduce custom code for CRUD 
operations (ex: {{readEntity}}). This approach also prevents Olingo code 
duplication in client code

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