This release is a pre-release and may not be stable for production use.
benzene-grpc
The gRPC edge of the Benzene Python port's wire contract. Ships the Benzene ↔ gRPC status mapping (wire-contracts.md §4.2) — the foundation of a gRPC transport binding.
Depends on benzene-core.
pip install benzene-grpc
from benzene.grpc import to_grpc, from_grpc, BENZENE_STATUS_TRAILER
to_grpc("not-found") # -> "NotFound"
to_grpc("created") # -> "OK" (all success statuses collapse to OK)
from_grpc("InvalidArgument") # -> "bad-request"
Because several Benzene statuses collapse to one gRPC code, a gRPC server MUST attach a
benzene-status trailer carrying the raw status verbatim; a client, seeing it, uses it in
preference to re-deriving from the code:
from_grpc("OK", trailer="created") # -> "created" (the trailer wins verbatim)
The mapping needs no grpcio dependency (codes are canonical name strings). The server/client
transport builds on it and adds the [transport] extra:
pip install 'benzene-grpc[transport]'
from concurrent.futures import ThreadPoolExecutor
import grpc
from benzene.core import BenzeneMessageApplication
from benzene.grpc import add_benzene_handler, GrpcMessageSender
server = grpc.server(ThreadPoolExecutor(max_workers=8))
add_benzene_handler(server, BenzeneMessageApplication(registry)) # every topic -> a unary method
server.add_insecure_port("[::]:50051"); server.start()
sender = GrpcMessageSender(grpc.insecure_channel("localhost:50051")) # a MessageSender
result = await sender.send_message("orders:place", {"sku": "A"})
The method name is the topic; the benzene-status trailer preserves the exact status across the
codes that collapse to one gRPC code. Mirrors .NET's Benzene.Grpc, and contributes the benzene.grpc
subpackage to the shared benzene namespace.
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