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grpc.go
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grpc.go
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package grpc
import (
"context"
ac "github.com/alexfalkowski/auth/client"
c "github.com/alexfalkowski/go-service/client"
"github.com/alexfalkowski/go-service/security"
"github.com/alexfalkowski/go-service/security/token"
"github.com/alexfalkowski/go-service/transport/grpc"
gt "github.com/alexfalkowski/go-service/transport/grpc/security/token"
"go.opentelemetry.io/otel/metric"
"go.opentelemetry.io/otel/trace"
"go.uber.org/fx"
"go.uber.org/zap"
g "google.golang.org/grpc"
)
// ClientOpts for gRPC.
type ClientOpts struct {
Lifecycle fx.Lifecycle
ClientConfig *c.Config
TokenConfig *token.Config
Logger *zap.Logger
Tracer trace.Tracer
Meter metric.Meter
Token *ac.Token
}
// NewClient for gRPC.
func NewClient(options ClientOpts) (*g.ClientConn, error) {
opts := []grpc.ClientOption{
grpc.WithClientLogger(options.Logger), grpc.WithClientTracer(options.Tracer),
grpc.WithClientMetrics(options.Meter), grpc.WithClientRetry(options.ClientConfig.Retry),
grpc.WithClientUserAgent(options.ClientConfig.UserAgent),
}
if IsAuth(options.TokenConfig) {
opts = append(opts, grpc.WithClientDialOption(g.WithPerRPCCredentials(gt.NewPerRPCCredentials(options.Token.Generator("jwt", "konfig")))))
}
if security.IsEnabled(options.ClientConfig.Security) {
sec, err := grpc.WithClientSecure(options.ClientConfig.Security)
if err != nil {
return nil, err
}
opts = append(opts, sec)
}
conn, err := grpc.NewClient(options.ClientConfig.Host, opts...)
if err != nil {
return nil, err
}
options.Lifecycle.Append(fx.Hook{
OnStop: func(_ context.Context) error {
return conn.Close()
},
})
return conn, nil
}