Rakesh Chander - Comviva Technologies NETWORK LAYER ABSTRACTION • Interceptors • Validators • Dependency Injection 

Rakesh Chander - Comviva Technologies Problem Statement – Common Request / Response operations – Serialization / Deserialization – Bearer Token Management – End to End Encryption – Testable Code 

Rakesh Chander - Comviva Technologies Unfolding – Common code templates & patterns – Generics – Abstraction – Over-riding behavior – Dependency Injection 

Rakesh Chander - Comviva Technologies Interceptors ■ Interceptors are a powerful mechanism that can pre-process or post-process a request 

Rakesh Chander - Comviva Technologies Interceptors (Request Header Definition) 

Rakesh Chander - Comviva Technologies Interceptors (Request Body Definition) 

Rakesh Chander - Comviva Technologies Interceptors (Response Body Definition) 

Rakesh Chander - Comviva Technologies Interceptors (Usage) 

Rakesh Chander - Comviva Technologies Validators ■ Serialization / Deserialization ■ Fallback Mechanism ■ Common Error Generation ■ Bearer Token Management 

Rakesh Chander - Comviva Technologies Adoption ■ API call can be declared using structs, its simple ■ Implement Protocols for required Request Type viz GET, POST, PUT, DELETE etc 

Rakesh Chander - Comviva Technologies Adoption (Overriding defaults) 

Rakesh Chander - Comviva Technologies Adoption (Execution) 

Rakesh Chander - Comviva Technologies Conclusion ■ Increased Productivity ■ Lesser error scenarios 

Rakesh Chander - Comviva Technologies Dependency Injection ■ Multiple Network Clients ■ Unit Tests 

Rakesh Chander - Comviva Technologies Dependency Injection (Network Client Implementation) 

Rakesh Chander - Comviva Technologies Dependency Injection (Network Client Mock) 

Rakesh Chander - Comviva Technologies Summary Scalable, Maintainable, Reusable & Testable Interceptors – Wrappers, Parsers, End to End Encryption Validators – Serialization/ Deserialization, Fallback Response DAO, Token Management 

Rakesh Chander - Comviva Technologies Try It Out! ■ https://github.com/rakeshchander/RCNetworkClient