grpc-middleware-example

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GRPC-Middleware-Example

This is an example usage of interceptor chaining in GRPC-Go.

1. Generate the pb file.

$ protoc -I releases releases.proto --go_out=plugins=grpc:releases

1. Start server

$ go run server/main.go

Console(server) shows the following message.

2019/10/23 16:23:57 Listening on  localhost:10000

1. Run Client

$ go run client/main.go

Console(client) shows the following logs

PS \GOPATH\src\GRPC-Middleware-Example> go run .\client\main.go
2019/10/23 16:24:04 A - start:  2019-10-23 16:24:04.913782 +0530 IST m=+0.011979601
2019/10/23 16:24:04 B - start:  2019-10-23 16:24:04.913782 +0530 IST m=+0.011979601
2019/10/23 16:24:04 B - Invoked RPC method=/releases.GoReleaseService/ListReleases; Duration=16.4963ms; Error=<nil>
2019/10/23 16:24:04 B - End:  2019-10-23 16:24:04.9302785 +0530 IST m=+0.028475901
2019/10/23 16:24:04 A - Invoked RPC method=/releases.GoReleaseService/ListReleases; Duration=17.0375ms; Error=<nil>
2019/10/23 16:24:04 A - End:  2019-10-23 16:24:04.9312815 +0530 IST m=+0.029478901
Version Release Date    Release Notes
1.1     21.10.2009      First release
1.13    22.10.2019      Latest release

and console(server) shows the following logs

2019/10/23 16:23:57 Listening on  localhost:10000
2019/10/23 16:24:04 A - start:  2019-10-23 16:24:04.927779 +0530 IST m=+7.782712601
2019/10/23 16:24:04 B - start:  2019-10-23 16:24:04.9282791 +0530 IST m=+7.783212701
2019/10/23 16:24:04 B - Request - Method:/releases.GoReleaseService/ListReleases        Duration:499.6µs        Error:<nil>
2019/10/23 16:24:04 B - End:  2019-10-23 16:24:04.9287787 +0530 IST m=+7.783712301
2019/10/23 16:24:04 A - Request - Method:/releases.GoReleaseService/ListReleases        Duration:1.5014ms       Error:<nil>
2019/10/23 16:24:04 A - End:  2019-10-23 16:24:04.929779 +0530 IST m=+7.784712501