[C++] Status of tracing / census / OpenTracing integration?

[tud...@gmail.com]

Hello,

What's the status of tracing in the C++ gRPC implementation?

I see a lot of references to census, and an implementation in the tree, but census_supported() returns CENSUS_FEATURE_NONE (with a TODO(aveitch): improve this as we implement features...), and the bindings between gRPC and census are incomplete (there are no calls to any census_start_* functions).

Alternatively, is there any (planned) support for interceptors, so we can build our own monitoring (perhaps on top of http://opentracing.io/)? I'd like to be able to intercept the begin and end of server calls, and to be able to store a custom (tracing) context in ClientContext and ServerContext (with propagation support in ClientContext::FromServerContext, so I can link tracing spans together).

Thank you,

-Tudor.

[gopi...@google.com]

C++ Tracing library will be released sometime in Q4 2017 or later. Its still in planning.

thanks,

Gopi

[Tudor Bosman]

Thanks!

How about interceptors?

Thanks,

-Tudor.

[Yang Gao]

There are currently non-public API under src/cpp/common/ for channel filters. You can try that out. I think its current form is not ready for moving to public headers.