New API to populate raw Common Schema 4.0 fields

[maxgolov]

There are several fields that cannot be currently populated by SDK. Example:

• ext.app.env
• ext.container
• etc.

Feature request:

• add new CS4.0 fields definition and regenerate the C++ bond-related code
• introduce a generic schema mapping mechanism that would allow to expose any new CS protocol field via SetProperty and SetContext API to the app caller

Request comes from MS Edge team.

[maxgolov]

This is also identical to MS Edge team ask "CS 3.0: Need a general method for updating all CS 3.0 optional fields." tracked under Task 22164965.

[maxgolov]

As discussed in several other threads: currently there is no more practical need to add more semantic APIs for individual common schema fields. Instead there's a new custom decorator pattern that allows to efficiently adjust the raw Common Schema Protocol Record fields. Customers who know they use Common Schema, and need to set specific schema field value - can use this pattern to populate the fields.

Example:

cpp_client_telemetry/tests/functests/APITest.cpp

Line 1089 in 83bb444

class CustomDecorator: public IDecoratorModule

I'm closing this issue in favor a custom decorator concept suggested above.