1#!/usr/bin/env ruby 2# 3# Copyright 2016 gRPC authors. 4# 5# Licensed under the Apache License, Version 2.0 (the "License"); 6# you may not use this file except in compliance with the License. 7# You may obtain a copy of the License at 8# 9# http://www.apache.org/licenses/LICENSE-2.0 10# 11# Unless required by applicable law or agreed to in writing, software 12# distributed under the License is distributed on an "AS IS" BASIS, 13# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 14# See the License for the specific language governing permissions and 15# limitations under the License. 16 17ENV['GRPC_ENABLE_FORK_SUPPORT'] = "1" 18fail "forking only supported on linux" unless RUBY_PLATFORM =~ /linux/ 19 20this_dir = File.expand_path(File.dirname(__FILE__)) 21protos_lib_dir = File.join(this_dir, 'lib') 22grpc_lib_dir = File.join(File.dirname(this_dir), 'lib') 23$LOAD_PATH.unshift(grpc_lib_dir) unless $LOAD_PATH.include?(grpc_lib_dir) 24$LOAD_PATH.unshift(protos_lib_dir) unless $LOAD_PATH.include?(protos_lib_dir) 25$LOAD_PATH.unshift(this_dir) unless $LOAD_PATH.include?(this_dir) 26 27require 'grpc' 28require 'end2end_common' 29 30def do_rpc(stub) 31 stub.echo(Echo::EchoRequest.new(request: 'hello'), deadline: Time.now + 1) 32rescue GRPC::Unavailable => e 33 STDERR.puts "RPC terminated with expected error: #{e}" 34rescue GRPC::DeadlineExceeded => e 35 STDERR.puts "RPC terminated with expected error: #{e}" 36end 37 38def main 39 # TODO(apolcyn): point this to a guaranteed-non-listening port 40 stub = Echo::EchoServer::Stub.new("localhost:443", :this_channel_is_insecure) 41 do_rpc(stub) 42 with_logging("GRPC.pre_fork") { GRPC.prefork } 43 pid = fork do 44 with_logging("child: GRPC.postfork_child") { GRPC.postfork_child } 45 with_logging("child: first post-fork RPC") { do_rpc(stub) } 46 with_logging("child: second post-fork RPC") { do_rpc(stub) } 47 STDERR.puts "child: done" 48 end 49 with_logging("parent: GRPC.postfork_parent") { GRPC.postfork_parent } 50 with_logging("parent: first post-fork RPC") { do_rpc(stub) } 51 with_logging("parent: second post-fork RPC") { do_rpc(stub) } 52 Process.wait pid 53 STDERR.puts "parent: done" 54end 55 56main 57