win32utils devel - Apr 2004 - Issues with win32-service Daemon

Hi all,

I wrote a little echo client to run as a service.  I have a couple of 
problems with this.   First, any time I try to define anything in 
"initialize", the service fails to start.  Any idea why?

Also, this service runs for a while, then just quits for no reason that I 
can see.  The Event Log merely says, "The Abba service terminated 
unexpectedly".

Any ideas on either issue?

Dan

# myservice.rb
require "socket"
require "win32/service"
include Win32

class MyDaemon < Daemon
	def service_main
		File.open("c:\\test.log","a+"){ |f|
f.puts("service_main entered") }
		s = TCPServer.new(8888)
		while socket = s.accept
			rv = socket.gets.chomp
			File.open("c:\\test.log","a+"){ |f| f.puts "GOT:
#{rv}" }
			socket.puts "Thanks!"
		end
		File.open("c:\\test.log","a+") { |f|
f.puts("service_main left") }
		#s.close
	end
end

m = MyDaemon.new
m.mainloop

# run_service.rb
require "win32/service"
include Win32

Name 		= "AbbaSvc"
DisplayName = "Abba"

file =
''c:\eclipse\workspace\ruby_foo\service_stuff\myservice.rb''
bin = "ruby " + file

if Service.exists?(Name)
	if Service.status(Name).current_state == "running"
		Service.stop(Name)
		sleep 3
		puts "Stopped service"
	end
	n = 3
	begin
		Service.delete(Name)
	rescue Win32::ServiceError => e
		puts "Unable to delete: #{e}"
		if n > 0
			puts "Retrying..."
			sleep 2
			n -= 1
			retry
		else
			STDERR.puts "Unable to delete.  Exiting..."
			exit
		end
	end
	puts "Deleted service"
end

svc = Service.new
svc.create_service{ |s|
	s.service_name 		= Name
	s.display_name 		= DisplayName
	s.binary_path_name 	= ''c:\ruby\bin\ruby '' + file
	s.dependencies 		= []
}
svc.close

puts "Service installed.  Attempting to start service"
sleep 2

Service.start(Name)
sleep 1
puts "Service started..."

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Hi Dan,

> Hi all,
>
> I wrote a little echo client to run as a service.  I have a couple of
> problems with this.   First, any time I try to define anything in
> "initialize", the service fails to start.  Any idea why?
>
> Also, this service runs for a while, then just quits for no reason that I
> can see.  The Event Log merely says, "The Abba service terminated
> unexpectedly".
>
> Any ideas on either issue?
>
1. You can solve the problem by breaking off the relation between Daemon
class and Service class.
Modify service.c line 1579
  cDaemon  = rb_define_class_under(mWin32, "Daemon", rb_cService);
with
  cDaemon  = rb_define_class_under(mWin32, "Daemon", rb_cObject);

2. Try begin ... rescue for exception handling. You will see what cause the
termination.

Park Heesob

# myservice.rb
require "socket"
require "win32/service"
include Win32

class MyDaemon < Daemon
def initialize
  @a = "10"
end

def service_main
    begin
  File.open("c:\\test.log","a+"){ |f|
f.puts("service_main entered with
#{@a}") }
  s = TCPServer.new(8888)
  while socket = s.accept
   rv = socket.gets.chomp
   File.open("c:\\test.log","a+"){ |f| f.puts "GOT:
#{rv}" }
   socket.puts "Thanks!"
  end
  File.open("c:\\test.log","a+") { |f|
f.puts("service_main left") }
  #s.close
    end
    rescue StandardError, Interrupt
        File.open("c:\\test.log","a+") { |f|
f.puts("Error: #{$!}") }
    end

end

m = MyDaemon.new
m.mainloop

> -----Original Message-----
> From: win32utils-devel-bounces@rubyforge.org 
> [mailto:win32utils-devel-bounces@rubyforge.org] On Behalf Of 
> win32utils-devel@rubyforge.org
> Sent: Saturday, April 10, 2004 1:46 AM
> To: win32utils-devel@rubyforge.org
> Subject: Re: [Win32utils-devel] Issues with win32-service Daemon
> 
> 
> Hi Dan,
> 
> 
> > Hi all,
> >
> > I wrote a little echo client to run as a service.  I have a 
> couple of
> > problems with this.   First, any time I try to define anything in
> > "initialize", the service fails to start.  Any idea why?
> >
> > Also, this service runs for a while, then just quits for no reason 
> > that I can see.  The Event Log merely says, "The Abba service 
> > terminated unexpectedly".
> >
> > Any ideas on either issue?
> >
> 1. You can solve the problem by breaking off the relation 
> between Daemon class and Service class. Modify service.c line 1579
>   cDaemon  = rb_define_class_under(mWin32, "Daemon", 
> rb_cService); with
>   cDaemon  = rb_define_class_under(mWin32, "Daemon", rb_cObject);
Perhaps we should do this.  I''m trying to remember if we had a good
reason for making it a subclass of Service.
> 
> 2. Try begin ... rescue for exception handling. You will see 
> what cause the termination.
> 
> Park Heesob
> 
> # myservice.rb
> require "socket"
> require "win32/service"
> include Win32
> 
> class MyDaemon < Daemon
> def initialize
>   @a = "10"
> end
> 
> def service_main
>     begin
>   File.open("c:\\test.log","a+"){ |f|
f.puts("service_main
> entered with
> #{@a}") }
>   s = TCPServer.new(8888)
>   while socket = s.accept
>    rv = socket.gets.chomp
>    File.open("c:\\test.log","a+"){ |f| f.puts
"GOT: #{rv}" }
>    socket.puts "Thanks!"
>   end
>   File.open("c:\\test.log","a+") { |f|
f.puts("service_main left") }
>   #s.close
>     end
>     rescue StandardError, Interrupt
>         File.open("c:\\test.log","a+") { |f|
f.puts("Error: #{$!}") }
>     end
> 
> end
> 
> m = MyDaemon.new
> m.mainloop
Actually it doesn''t seem to help - nothing gets logged except in the
Event Log.  It takes about 10-15 minutes for this to happen, btw.  A
little Google searching indicates that the SCM is receiving an
unexpected exit somehow, so I may slap some extra code in to "watch"
the
SCM to see what''s going on.

Regards,

Dan