googleapis
Encode any Enums in Routing Header as an Int
See go/clientlibs-routine-headers-numeric-enums for more information.
Enums in every implicit/ explicit routing header should be encoded as an Int.
The Routing Headers seem to be encoded here via a ParamsExtractor. Example: https://github.com/googleapis/sdk-platform-java/blob/44701e88de88428fb8a94692ffcc85ac815cc203/showcase/gapic-showcase/src/main/java/com/google/showcase/v1beta1/stub/HttpJsonComplianceStub.java#L850-L855 This should be modified to get the Int value instead.
Generator changes:
Affect the AbstractTransportServiceStubClassComposer. Specifically around: https://github.com/googleapis/sdk-platform-java/blob/44701e88de88428fb8a94692ffcc85ac815cc203/gapic-generator-java/src/main/java/com/google/api/generator/gapic/composer/common/AbstractTransportServiceStubClassComposer.java#L1252-L1258
Both methods should be modified so that the changes are applied for both implicit and explicit routing headers.
Created a new issue for implicit routing headers case - https://github.com/googleapis/sdk-platform-java/issues/2368 . Implemenation PR - https://github.com/googleapis/sdk-platform-java/pull/2328
FYI, only implicit routing headers can be fixed currently because explicit routing headers are implemented as strings by design. See this doc for more details.
Implicit Routing Headers were implemented. Discussion is pending explicit routing headers and how to properly implement it.