Module grpc 

gRPC dispatcher for the A2A server.

GrpcDispatcher serves the canonical lf.a2a.v1.A2AService — the protobuf-native A2A v1.0 binding, wire-compatible with the official Go, Python, and Java A2A SDKs. Request and response messages are the prost-generated types from a2a_protocol_types::proto, converted to the same domain types the JSON-RPC and REST bindings use before being routed to the underlying crate::RequestHandler.

Legacy JSON tunnel

Releases before 0.7 tunneled JSON inside a protobuf bytes envelope on a non-standard service (a2a.v1.A2aService). Enabling the grpc-legacy-json feature serves that service alongside the canonical one (the two have distinct fully-qualified names) so 0.6 gRPC clients keep working during rolling upgrades. The tunnel is deprecated and will be removed in 0.8.

Configuration

Use GrpcConfig to control message size limits and concurrency.

Example

use std::sync::Arc;
use a2a_protocol_server::dispatch::grpc::{GrpcDispatcher, GrpcConfig};
use a2a_protocol_server::RequestHandlerBuilder;
let handler = Arc::new(
    RequestHandlerBuilder::new(MyExec).build().unwrap()
);
let config = GrpcConfig::default();
let dispatcher = GrpcDispatcher::new(handler, config);
dispatcher.serve("127.0.0.1:50051").await?;

Structs

A2aServiceImpl

The tonic service implementation for the canonical A2A binding.

A2aServiceServer

Provides operations for interacting with agents using the A2A protocol.

GrpcConfig

Configuration for the gRPC dispatcher.

GrpcDispatcher

gRPC dispatcher that routes A2A requests to a RequestHandler.

LegacyA2aServiceServer

A2A gRPC service.

LegacyGrpcServiceImpl

The tonic service implementation for the deprecated JSON tunnel.