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# 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 "grpc"
module Labkit
module Correlation
module GRPC
# ServerInterceptor is a server-side GRPC interceptor
# for injecting GRPC calls with a correlation-id passed from
# a GRPC client to the GRPC Ruby Service
class ServerInterceptor < ::GRPC::ServerInterceptor
include Labkit::Correlation::GRPC::GRPCCommon
def request_response(request: nil, call: nil, method: nil)
wrap_with_correlation_id(call) do
yield
end
end
def client_streamer(call: nil, method: nil)
wrap_with_correlation_id(call) do
yield
end
end
def server_streamer(request: nil, call: nil, method: nil)
wrap_with_correlation_id(call) do
yield
end
end
def bidi_streamer(requests: nil, call: nil, method: nil)
wrap_with_correlation_id(call) do
yield
end
end
private
def wrap_with_correlation_id(call, &block)
correlation_id = call.metadata[CORRELATION_METADATA_KEY]
correlation_id ||= Labkit::Correlation::CorrelationId.current_or_new_id
Labkit::Correlation::CorrelationId.use_id(correlation_id, &block)
end
end
end
end
end
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