How to pass data from rpc server call to server interceptor in java?

[preeth...@gmail.com]

Hi all,

I am trying to set some metadata after the rpc server call has been processed. The plan was to use server interceptor and override `close` method. 

Something like this: https://github.com/dconnelly/grpc-error-example/blob/master/src/main/java/example/Errors.java#L38 

But the metadata value depends on the response. So I need some way to pass data from rpc server call to server interceptor. 

In  Golang, the metadata can be set easily in the rpc call `grpc.SetTrailer` after processing but in java there is no way to do it  in rpc call. So I am trying to use server interceptor for the same.

Can someone help?

[Kun Zhang]

You can also override sendMessage() on the forwarding ServerCall, save the information you need from the response, and use it in the overridden close().