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# frozen_string_literal: true
require 'opentracing'
require 'grpc'
module Gitlab
module Tracing
class GRPCInterceptor < GRPC::ClientInterceptor
include Common
include Singleton
def request_response(request:, call:, method:, metadata:)
wrap_with_tracing(method, 'unary', metadata) do
yield
end
end
def client_streamer(requests:, call:, method:, metadata:)
wrap_with_tracing(method, 'client_stream', metadata) do
yield
end
end
def server_streamer(request:, call:, method:, metadata:)
wrap_with_tracing(method, 'server_stream', metadata) do
yield
end
end
def bidi_streamer(requests:, call:, method:, metadata:)
wrap_with_tracing(method, 'bidi_stream', metadata) do
yield
end
end
private
def wrap_with_tracing(method, grpc_type, metadata)
tags = {
'component' => 'grpc',
'span.kind' => 'client',
'grpc.method' => method,
'grpc.type' => grpc_type
}
in_tracing_span(operation_name: "grpc:#{method}", tags: tags) do |span|
OpenTracing.inject(span.context, OpenTracing::FORMAT_TEXT_MAP, metadata)
yield
end
end
end
end
end
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