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Code Issues Releases Activity

feat: support load balance for streaming connection creation (#2669)

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* feat: support load balance for streaming connection creation

* fix lint
This commit is contained in:
包子 2023-02-27 15:43:21 +08:00 committed by GitHub
parent 19f008b483
commit 834b781ee2
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1 changed files with 23 additions and 3 deletions
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26
transport/grpc/client.go
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@ -146,16 +146,22 @@ func dial(ctx context.Context, insecure bool, opts ...ClientOption) (*grpc.Clien
ints := []grpc.UnaryClientInterceptor{
unaryClientInterceptor(options.middleware, options.timeout, options.filters),
}
sints := []grpc.StreamClientInterceptor{
streamClientInterceptor(options.filters),
}
if len(options.ints) > 0 {
ints = append(ints, options.ints...)
}
if len(options.streamInts) > 0 {
sints = append(sints, options.streamInts...)
}
grpcOpts := []grpc.DialOption{
grpc.WithDefaultServiceConfig(fmt.Sprintf(`{"loadBalancingConfig": [{"%s":{}}]}`, options.balancerName)),
grpc.WithChainUnaryInterceptor(ints...),
grpc.WithChainStreamInterceptor(sints...),
}
if len(options.streamInts) > 0 {
grpcOpts = append(grpcOpts, grpc.WithChainStreamInterceptor(options.streamInts...))
}
if options.discovery != nil {
grpcOpts = append(grpcOpts,
grpc.WithResolvers(
@ -211,3 +217,17 @@ func unaryClientInterceptor(ms []middleware.Middleware, timeout time.Duration, f
return err
}
}
func streamClientInterceptor(filters []selector.NodeFilter) grpc.StreamClientInterceptor {
return func(ctx context.Context, desc *grpc.StreamDesc, cc *grpc.ClientConn, method string, streamer grpc.Streamer, opts ...grpc.CallOption) (grpc.ClientStream, error) { // nolint
ctx = transport.NewClientContext(ctx, &Transport{
endpoint: cc.Target(),
operation: method,
reqHeader: headerCarrier{},
nodeFilters: filters,
})
var p selector.Peer
ctx = selector.NewPeerContext(ctx, &p)
return streamer(ctx, desc, cc, method, opts...)
}
}