interceptors: migrate to otel and add logging interceptor

Signed-off-by: Adphi <philippe.adrien.nousse@gmail.com>

example/pb/example_grpc.pb.go

@@ -0,0 +1,163 @@
+// Code generated by protoc-gen-go-grpc. DO NOT EDIT.
+// versions:
+// - protoc-gen-go-grpc v1.5.1
+// - protoc             v5.28.2
+// source: example/pb/example.proto
+
+package pb
+
+import (
+	context "context"
+	grpc "google.golang.org/grpc"
+	codes "google.golang.org/grpc/codes"
+	status "google.golang.org/grpc/status"
+)
+
+// This is a compile-time assertion to ensure that this generated file
+// is compatible with the grpc package it is being compiled against.
+// Requires gRPC-Go v1.64.0 or later.
+const _ = grpc.SupportPackageIsVersion9
+
+const (
+	Greeter_SayHello_FullMethodName       = "/helloworld.Greeter/SayHello"
+	Greeter_SayHelloStream_FullMethodName = "/helloworld.Greeter/SayHelloStream"
+)
+
+// GreeterClient is the client API for Greeter service.
+//
+// For semantics around ctx use and closing/ending streaming RPCs, please refer to https://pkg.go.dev/google.golang.org/grpc/?tab=doc#ClientConn.NewStream.
+type GreeterClient interface {
+	SayHello(ctx context.Context, in *HelloRequest, opts ...grpc.CallOption) (*HelloReply, error)
+	SayHelloStream(ctx context.Context, in *HelloStreamRequest, opts ...grpc.CallOption) (grpc.ServerStreamingClient[HelloReply], error)
+}
+
+type greeterClient struct {
+	cc grpc.ClientConnInterface
+}
+
+func NewGreeterClient(cc grpc.ClientConnInterface) GreeterClient {
+	return &greeterClient{cc}
+}
+
+func (c *greeterClient) SayHello(ctx context.Context, in *HelloRequest, opts ...grpc.CallOption) (*HelloReply, error) {
+	cOpts := append([]grpc.CallOption{grpc.StaticMethod()}, opts...)
+	out := new(HelloReply)
+	err := c.cc.Invoke(ctx, Greeter_SayHello_FullMethodName, in, out, cOpts...)
+	if err != nil {
+		return nil, err
+	}
+	return out, nil
+}
+
+func (c *greeterClient) SayHelloStream(ctx context.Context, in *HelloStreamRequest, opts ...grpc.CallOption) (grpc.ServerStreamingClient[HelloReply], error) {
+	cOpts := append([]grpc.CallOption{grpc.StaticMethod()}, opts...)
+	stream, err := c.cc.NewStream(ctx, &Greeter_ServiceDesc.Streams[0], Greeter_SayHelloStream_FullMethodName, cOpts...)
+	if err != nil {
+		return nil, err
+	}
+	x := &grpc.GenericClientStream[HelloStreamRequest, HelloReply]{ClientStream: stream}
+	if err := x.ClientStream.SendMsg(in); err != nil {
+		return nil, err
+	}
+	if err := x.ClientStream.CloseSend(); err != nil {
+		return nil, err
+	}
+	return x, nil
+}
+
+// This type alias is provided for backwards compatibility with existing code that references the prior non-generic stream type by name.
+type Greeter_SayHelloStreamClient = grpc.ServerStreamingClient[HelloReply]
+
+// GreeterServer is the server API for Greeter service.
+// All implementations must embed UnimplementedGreeterServer
+// for forward compatibility.
+type GreeterServer interface {
+	SayHello(context.Context, *HelloRequest) (*HelloReply, error)
+	SayHelloStream(*HelloStreamRequest, grpc.ServerStreamingServer[HelloReply]) error
+	mustEmbedUnimplementedGreeterServer()
+}
+
+// UnimplementedGreeterServer must be embedded to have
+// forward compatible implementations.
+//
+// NOTE: this should be embedded by value instead of pointer to avoid a nil
+// pointer dereference when methods are called.
+type UnimplementedGreeterServer struct{}
+
+func (UnimplementedGreeterServer) SayHello(context.Context, *HelloRequest) (*HelloReply, error) {
+	return nil, status.Errorf(codes.Unimplemented, "method SayHello not implemented")
+}
+func (UnimplementedGreeterServer) SayHelloStream(*HelloStreamRequest, grpc.ServerStreamingServer[HelloReply]) error {
+	return status.Errorf(codes.Unimplemented, "method SayHelloStream not implemented")
+}
+func (UnimplementedGreeterServer) mustEmbedUnimplementedGreeterServer() {}
+func (UnimplementedGreeterServer) testEmbeddedByValue()                 {}
+
+// UnsafeGreeterServer may be embedded to opt out of forward compatibility for this service.
+// Use of this interface is not recommended, as added methods to GreeterServer will
+// result in compilation errors.
+type UnsafeGreeterServer interface {
+	mustEmbedUnimplementedGreeterServer()
+}
+
+func RegisterGreeterServer(s grpc.ServiceRegistrar, srv GreeterServer) {
+	// If the following call pancis, it indicates UnimplementedGreeterServer was
+	// embedded by pointer and is nil.  This will cause panics if an
+	// unimplemented method is ever invoked, so we test this at initialization
+	// time to prevent it from happening at runtime later due to I/O.
+	if t, ok := srv.(interface{ testEmbeddedByValue() }); ok {
+		t.testEmbeddedByValue()
+	}
+	s.RegisterService(&Greeter_ServiceDesc, srv)
+}
+
+func _Greeter_SayHello_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
+	in := new(HelloRequest)
+	if err := dec(in); err != nil {
+		return nil, err
+	}
+	if interceptor == nil {
+		return srv.(GreeterServer).SayHello(ctx, in)
+	}
+	info := &grpc.UnaryServerInfo{
+		Server:     srv,
+		FullMethod: Greeter_SayHello_FullMethodName,
+	}
+	handler := func(ctx context.Context, req interface{}) (interface{}, error) {
+		return srv.(GreeterServer).SayHello(ctx, req.(*HelloRequest))
+	}
+	return interceptor(ctx, in, info, handler)
+}
+
+func _Greeter_SayHelloStream_Handler(srv interface{}, stream grpc.ServerStream) error {
+	m := new(HelloStreamRequest)
+	if err := stream.RecvMsg(m); err != nil {
+		return err
+	}
+	return srv.(GreeterServer).SayHelloStream(m, &grpc.GenericServerStream[HelloStreamRequest, HelloReply]{ServerStream: stream})
+}
+
+// This type alias is provided for backwards compatibility with existing code that references the prior non-generic stream type by name.
+type Greeter_SayHelloStreamServer = grpc.ServerStreamingServer[HelloReply]
+
+// Greeter_ServiceDesc is the grpc.ServiceDesc for Greeter service.
+// It's only intended for direct use with grpc.RegisterService,
+// and not to be introspected or modified (even as a copy)
+var Greeter_ServiceDesc = grpc.ServiceDesc{
+	ServiceName: "helloworld.Greeter",
+	HandlerType: (*GreeterServer)(nil),
+	Methods: []grpc.MethodDesc{
+		{
+			MethodName: "SayHello",
+			Handler:    _Greeter_SayHello_Handler,
+		},
+	},
+	Streams: []grpc.StreamDesc{
+		{
+			StreamName:    "SayHelloStream",
+			Handler:       _Greeter_SayHelloStream_Handler,
+			ServerStreams: true,
+		},
+	},
+	Metadata: "example/pb/example.proto",
+}