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|
package middleware
import (
"context"
"github.com/sirupsen/logrus"
"gitlab.com/gitlab-org/gitaly/internal/praefect/metrics"
"gitlab.com/gitlab-org/gitaly/internal/praefect/protoregistry"
"google.golang.org/grpc"
)
// MethodTypeUnaryInterceptor returns a Unary Interceptor that records the method type of incoming RPC requests
func MethodTypeUnaryInterceptor(r *protoregistry.Registry) grpc.UnaryServerInterceptor {
return func(ctx context.Context, req interface{}, info *grpc.UnaryServerInfo, handler grpc.UnaryHandler) (interface{}, error) {
observeMethodType(r, info.FullMethod)
res, err := handler(ctx, req)
return res, err
}
}
// MethodTypeStreamInterceptor returns a Stream Interceptor that records the method type of incoming RPC requests
func MethodTypeStreamInterceptor(r *protoregistry.Registry) grpc.StreamServerInterceptor {
return func(srv interface{}, stream grpc.ServerStream, info *grpc.StreamServerInfo, handler grpc.StreamHandler) error {
observeMethodType(r, info.FullMethod)
err := handler(srv, stream)
return err
}
}
func observeMethodType(registry *protoregistry.Registry, fullMethod string) {
if registry.IsInterceptedMethod(fullMethod) {
return
}
mi, err := registry.LookupMethod(fullMethod)
if err != nil {
logrus.WithField("full_method_name", fullMethod).WithError(err).Warn("error when looking up method info")
}
var opType string
switch mi.Operation {
case protoregistry.OpAccessor:
opType = "accessor"
case protoregistry.OpMutator:
opType = "mutator"
default:
return
}
metrics.MethodTypeCounter.WithLabelValues(opType).Inc()
}
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