1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
|
# frozen_string_literal: true
# Disable the UnusedMethodArgument linter, since we need to declare the kwargs
# in the methods, but we don't actually use them.
require "opentracing"
require "grpc"
require "singleton"
module Labkit
module Tracing
module GRPC
# GRPCClientInterceptor is a client-side GRPC interceptor
# for instrumenting GRPC calls with distributed tracing
class ClientInterceptor < ::GRPC::ClientInterceptor
include Singleton
def request_response(request:, call:, method:, metadata:)
wrap_with_tracing(method, "unary", metadata) { yield }
end
def client_streamer(requests:, call:, method:, metadata:)
wrap_with_tracing(method, "client_stream", metadata) { yield }
end
def server_streamer(request:, call:, method:, metadata:)
wrap_with_tracing(method, "server_stream", metadata) { yield }
end
def bidi_streamer(requests:, call:, method:, metadata:)
wrap_with_tracing(method, "bidi_stream", metadata) { yield }
end
private
def wrap_with_tracing(method, grpc_type, metadata)
tags = { "component" => "grpc", "span.kind" => "client", "grpc.method" => method, "grpc.type" => grpc_type }
TracingUtils.with_tracing(operation_name: "grpc:#{method}", tags: tags) do |span|
OpenTracing.inject(span.context, OpenTracing::FORMAT_TEXT_MAP, metadata)
yield
end
end
end
end
end
end
|
