1# Copyright 2015 gRPC authors. 2# 3# Licensed under the Apache License, Version 2.0 (the "License"); 4# you may not use this file except in compliance with the License. 5# You may obtain a copy of the License at 6# 7# http://www.apache.org/licenses/LICENSE-2.0 8# 9# Unless required by applicable law or agreed to in writing, software 10# distributed under the License is distributed on an "AS IS" BASIS, 11# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 12# See the License for the specific language governing permissions and 13# limitations under the License. 14 15# GRPC contains the General RPC module. 16module GRPC 17 def self.logger=(logger_obj) 18 # Need a free variable here to keep value of logger_obj for logger closure 19 @logger = logger_obj 20 21 extend( 22 Module.new do 23 def logger 24 @logger 25 end 26 end 27 ) 28 end 29 30 # DefaultLogger is a module included in GRPC if no other logging is set up for 31 # it. See ../spec/spec_helpers an example of where other logging is added. 32 module DefaultLogger 33 def logger 34 LOGGER 35 end 36 37 private 38 39 # NoopLogger implements the methods of Ruby's conventional logging interface 40 # that are actually used internally within gRPC with a noop implementation. 41 class NoopLogger 42 def info(_ignored) 43 end 44 45 def debug(_ignored) 46 end 47 48 def warn(_ignored) 49 end 50 end 51 52 LOGGER = NoopLogger.new 53 end 54 55 # Inject the noop #logger if no module-level logger method has been injected. 56 extend DefaultLogger unless methods.include?(:logger) 57end 58