drb_test_case.rb
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require 'drb'
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# pass anything as an arg to make this script fail
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borked_mode = ARGV.shift
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# The RPC Server Class
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class Foo |
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def a |
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"AAAA"
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end
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def b |
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"BBBB"
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end
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def c |
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"CCCC"
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end
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end
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# Save all the child pids
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pids = [] |
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# Run the RPC Server in a seperate process
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pids << Kernel.fork do |
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DRb.start_service("druby://127.0.0.1:13370",Foo.new) |
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sleep # until process gets killed
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end
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sleep(1)
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# If the parent process calls any remote method at all, the child PIDs get invalid data
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client = DRbObject.new_with_uri("druby://127.0.0.1:13370") |
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# Comment this line and this script works, otherwise data gets mixed up.
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client.c if borked_mode
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# Startup 10 child processes that call 'a' on the rpc server
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10.times do |
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pids << Kernel.fork do |
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require 'drb'
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begin
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client = DRbObject.new_with_uri("druby://127.0.0.1:13370") |
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while true |
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res = client.a |
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if res !~ /AAAA/ |
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puts "A BAD RESULT (#{res.inspect})"
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else
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puts "a ok"
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end
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sleep(0.2)
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end
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rescue
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puts "a exiting"
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end
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end
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end
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# Startup 10 child processes that call 'b' on the rpc server
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10.times do |
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pids << Kernel.fork do |
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require 'drb'
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begin
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client = DRbObject.new_with_uri("druby://127.0.0.1:13370") |
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while true |
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res = client.b |
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if res !~ /BBBB/ |
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puts "B BAD RESULT (#{res.inspect})"
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else
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puts "b ok"
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end
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sleep(0.2)
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end
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rescue
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puts "b exiting"
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end
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end
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end
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sleep(5)
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pids.each do |p|
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Process.kill('KILL',p) rescue nil |
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Process.waitpid(p,Process::WNOHANG) |
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end
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exit |