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fix: add layer to set concurrent limits for gRPC #302

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Merged
merged 1 commit into from
May 21, 2025
Merged

fix: add layer to set concurrent limits for gRPC #302

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2 changes: 1 addition & 1 deletion tap_aggregator/Cargo.toml
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Original file line number Diff line number Diff line change
Expand Up @@ -32,7 +32,7 @@ tap_graph.workspace = true
thegraph-core = { workspace = true, features = ["alloy-eip712"] }
tokio.workspace = true
tonic.workspace = true
tower.workspace = true
tower = { workspace = true, features = ["util", "steer", "limit"] }
tracing-subscriber.workspace = true

[build-dependencies]
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8 changes: 7 additions & 1 deletion tap_aggregator/src/server.rs
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Expand Up @@ -378,8 +378,14 @@ pub async fn run_server(

let grpc_service = create_grpc_service(rpc_impl)?;

let grpc_router = Router::new()
.layer(tower::limit::ConcurrencyLimitLayer::new(
max_concurrent_connections as usize,
))
.merge(grpc_service.into_axum_router());

let service = tower::steer::Steer::new(
[json_rpc_router, grpc_service.into_axum_router()],
[json_rpc_router, grpc_router],
|req: &hyper::Request<_>, _services: &[_]| {
if req
.headers()
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