How to implement custom handlers - Cloud Application Programming Model

[miltonc]

Github repository:

To be published soon...

 

Introduction:

• In this session, we will look at how we can implement custom handlers in Cloud Application Programming Model

 

Synopsis:

• CAP model provides generic handlers that takes care of all the CRUD functionality right out-of-the-box


• Sometimes, this may be enough for your business needs, but other times you may need to do more based on business requirements


• We can add custom middleware functions that can run before, after or even instead of the generic handler

 

Steps:

• In this example, we will start with a basic custom handler that logs all requests that are sent to the OData Service


• Then we will add another custom handler that runs only for the Users entity - We will add a business requirement that all passwords need to be stored encrypted


• We will make use of bcryptjs npm package to encrypt the password and store it in our SAP HANA database

 

Youtube link:

https://youtu.be/YlHHmZxelmw

 

Conclusion:

• This video should give you a clear idea on how to implement custom handlers in Cloud Application Programming Model


• You can have multiple custom handlers that can run for the same entity before or after the generic handler


• In the next video, we will look at a more complex scenario involving the _req object and also how to debug and set breakpoints in our code


• If you have any questions or comments, please list them below and I will be happy to answer

 

Next post:

https://blogs.sap.com/2020/08/23/how-to-implement-functions-cloud-application-programming-model/

 

Previous post:

https://blogs.sap.com/2020/08/23/how-to-add-support-for-sap-hana-cloud-application-programming-model...