Graceful Stop Demo

This example demonstrates the intended shutdown behavior after the gRPC graceful-stop patch.

Run

go run ./examples/graceful-stop

Expected behavior

• one long-running RPC starts
• shutdown begins while that RPC is still running
• new RPCs stop being accepted shortly after shutdown starts
• the in-flight RPC is allowed to finish

Typical output:

long RPC is running; starting shutdown
new RPC rejected after shutdown began: ...
long RPC completed: slept for 1500ms
done

There may be a small race window where the first post-stop RPC is still accepted once before subsequent new RPCs are rejected. The important part is that in-flight RPCs are drained while new RPCs are cut off.

Automated check

go test ./server/grpc -run TestGracefulStopRejectsNewRPCsButAllowsInFlightRPCs -v

Environment

• no special environment variables are required
• the demo may print a TLS warning from go-micro; it is unrelated to this change