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Simon

2007-Apr-23 17:40 UTC

backgroundrb and REXML issue

Hi,

I have an application that receives XML files, and then hands each one
off to a backgroundrb worker to parse and store the info.  Everything
was working, until I needed to support a larger character set.  So I
added the following to the top of my XML files: <?xml version="1.0"
encoding="ISO-8859-1"?>

Adding this worked fine when I tested it without using backgroundrb.
That is, when parsing within the main application, I get the expected
behaviour.  However, when I try to hand it off to a worker, I get the
following error in backgroundrb.log:

20070423-13:36:41 (8456) Connection reset by peer -
(DRb::DRbConnError)
20070423-13:36:41 (8456) /usr/lib/ruby/1.8/drb/drb.rb:563:in `read''
20070423-13:36:41 (8456) /usr/lib/ruby/1.8/drb/drb.rb:563:in `load''
20070423-13:36:41 (8456) /usr/lib/ruby/1.8/drb/drb.rb:629:in
`recv_reply''
20070423-13:36:41 (8456) /usr/lib/ruby/1.8/drb/drb.rb:918:in
`recv_reply''
20070423-13:36:41 (8456) /usr/lib/ruby/1.8/drb/drb.rb:1192:in
`send_message''
20070423-13:36:41 (8456) /usr/lib/ruby/1.8/drb/drb.rb:1083:in
`method_missing''
20070423-13:36:41 (8456) /usr/lib/ruby/1.8/drb/drb.rb:1167:in `open''
20070423-13:36:41 (8456) /usr/lib/ruby/1.8/drb/drb.rb:1082:in
`method_missing''
20070423-13:36:41 (8456) /usr/lib/ruby/1.8/drb/drb.rb:1100:in
`with_friend''
20070423-13:36:41 (8456) /usr/lib/ruby/1.8/drb/drb.rb:1081:in
`method_missing''
20070423-13:36:41 (8456) /usr/lib/ruby/1.8/drb/drb.rb:1069:in
`respond_to?''
20070423-13:36:41 (8456) /usr/lib/ruby/1.8/rexml/xpath_parser.rb:
205:in `expr''
20070423-13:36:41 (8456) /usr/lib/ruby/1.8/rexml/xpath_parser.rb:
203:in `expr''
20070423-13:36:41 (8456) /usr/lib/ruby/1.8/rexml/xpath_parser.rb:
125:in `match''
20070423-13:36:41 (8456) /usr/lib/ruby/1.8/rexml/xpath_parser.rb:56:in
`parse''
20070423-13:36:41 (8456) /usr/lib/ruby/1.8/rexml/xpath.rb:53:in `each''
20070423-13:36:41 (8456) /usr/local/src/rails/434Wireless/lib/workers/
parser_worker.rb:376:in `do_work''
20070423-13:36:41 (8456) /usr/local/src/rails/434Wireless/vendor/
plugins/backgroundrb/server/lib/backgroundrb/worker.rb:55:in
`work_thread''
20070423-13:36:41 (8456) /usr/local/src/rails/434Wireless/vendor/
plugins/backgroundrb/server/lib/backgroundrb/worker.rb:69:in
`work_thread''
20070423-13:36:41 (8456) /usr/local/src/rails/434Wireless/vendor/
plugins/backgroundrb/server/lib/backgroundrb/worker.rb:67:in
`work_thread''
20070423-13:36:41 (8456) /usr/lib/ruby/1.8/drb/drb.rb:1552:in
`perform_without_block''
20070423-13:36:41 (8456) /usr/lib/ruby/1.8/drb/drb.rb:1512:in
`perform''
20070423-13:36:41 (8456) /usr/lib/ruby/1.8/drb/drb.rb:1586:in
`main_loop''
20070423-13:36:41 (8456) /usr/lib/ruby/1.8/drb/drb.rb:1582:in
`main_loop''
20070423-13:36:41 (8456) /usr/lib/ruby/1.8/drb/drb.rb:1578:in
`main_loop''
20070423-13:36:41 (8456) /usr/lib/ruby/1.8/drb/drb.rb:1427:in `run''
20070423-13:36:41 (8456) /usr/lib/ruby/1.8/drb/drb.rb:1424:in `run''
20070423-13:36:41 (8456) /usr/lib/ruby/1.8/drb/drb.rb:1344:in
`initialize''
20070423-13:36:41 (8456) /usr/lib/ruby/1.8/drb/drb.rb:1624:in
`start_service''
20070423-13:36:41 (8456) /usr/lib/ruby/gems/1.8/gems/slave-1.2.0/lib/
slave.rb:396:in `initialize''
20070423-13:36:41 (8456) /usr/lib/ruby/gems/1.8/gems/slave-1.2.0/lib/
slave.rb:391:in `initialize''
20070423-13:36:41 (8456) /usr/local/src/rails/434Wireless/vendor/
plugins/backgroundrb/server/lib/backgroundrb/middleman.rb:210:in
`new_worker''
20070423-13:36:41 (8456) /usr/local/src/rails/434Wireless/vendor/
plugins/backgroundrb/server/lib/backgroundrb/thread_pool.rb:36:in
`dispatch''
20070423-13:36:41 (8456) /usr/local/src/rails/434Wireless/vendor/
plugins/backgroundrb/server/lib/backgroundrb/thread_pool.rb:22:in
`dispatch''
20070423-13:36:41 (8456) /usr/local/src/rails/434Wireless/vendor/
plugins/backgroundrb/server/lib/backgroundrb/middleman.rb:199:in
`new_worker''
20070423-13:36:41 (8456) /usr/lib/ruby/1.8/drb/drb.rb:1552:in
`perform_without_block''
20070423-13:36:41 (8456) /usr/lib/ruby/1.8/drb/drb.rb:1512:in
`perform''
20070423-13:36:41 (8456) /usr/lib/ruby/1.8/drb/drb.rb:1586:in
`main_loop''
20070423-13:36:41 (8456) /usr/lib/ruby/1.8/drb/drb.rb:1582:in
`main_loop''
20070423-13:36:41 (8456) /usr/lib/ruby/1.8/drb/drb.rb:1578:in
`main_loop''
20070423-13:36:41 (8456) /usr/lib/ruby/1.8/drb/drb.rb:1427:in `run''
20070423-13:36:41 (8456) /usr/lib/ruby/1.8/drb/drb.rb:1424:in `run''
20070423-13:36:41 (8456) /usr/lib/ruby/1.8/drb/drb.rb:1344:in
`initialize''
20070423-13:36:41 (8456) /usr/lib/ruby/1.8/drb/drb.rb:1624:in
`start_service''
20070423-13:36:41 (8456) /usr/local/src/rails/434Wireless/vendor/
plugins/backgroundrb/server/lib/backgroundrb_server.rb:315:in `run''
20070423-13:36:41 (8456) /usr/lib/ruby/gems/1.8/gems/daemons-1.0.5/lib/
daemons/application.rb:187:in `start_proc''
20070423-13:36:41 (8456) /usr/lib/ruby/gems/1.8/gems/daemons-1.0.5/lib/
daemons/daemonize.rb:192:in `call_as_daemon''
20070423-13:36:41 (8456) /usr/lib/ruby/gems/1.8/gems/daemons-1.0.5/lib/
daemons/application.rb:191:in `start_proc''
20070423-13:36:41 (8456) /usr/lib/ruby/gems/1.8/gems/daemons-1.0.5/lib/
daemons/application.rb:227:in `start''
20070423-13:36:41 (8456) /usr/lib/ruby/gems/1.8/gems/daemons-1.0.5/lib/
daemons/controller.rb:69:in `run''
20070423-13:36:41 (8456) /usr/lib/ruby/gems/1.8/gems/daemons-1.0.5/lib/
daemons.rb:182:in `run_proc''
20070423-13:36:41 (8456) /usr/lib/ruby/gems/1.8/gems/daemons-1.0.5/lib/
daemons/cmdline.rb:105:in `catch_exceptions''
20070423-13:36:41 (8456) /usr/lib/ruby/gems/1.8/gems/daemons-1.0.5/lib/
daemons.rb:181:in `run_proc''
20070423-13:36:41 (8456) /usr/local/src/rails/434Wireless/vendor/
plugins/backgroundrb/server/lib/backgroundrb_server.rb:301:in `run''
20070423-13:36:41 (8456) script/backgroundrb:29

I tried removing the line that gives the XML version from the top of
the same test file, and then it crashes where I expect it to, when it
encounters invalid characters.  Any ideas as to what is happening?

Thanks,

Simon


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Zack Chandler

2007-Apr-24 03:46 UTC

head link

Re: backgroundrb and REXML issue

> I have an application that receives XML files, and then hands each one
> off to a backgroundrb worker to parse and store the info.  Everything
> was working, until I needed to support a larger character set.  So I
> added the following to the top of my XML files: <?xml
version="1.0"
> encoding="ISO-8859-1"?>
>
> Adding this worked fine when I tested it without using backgroundrb.
> That is, when parsing within the main application, I get the expected
> behaviour.  However, when I try to hand it off to a worker, I get the
> following error in backgroundrb.log:
>
> 20070423-13:36:41 (8456) Connection reset by peer -
> (DRb::DRbConnError)
> 20070423-13:36:41 (8456) /usr/lib/ruby/1.8/drb/drb.rb:563:in
`read''
> 20070423-13:36:41 (8456) /usr/lib/ruby/1.8/drb/drb.rb:563:in
`load''
> 20070423-13:36:41 (8456) /usr/lib/ruby/1.8/drb/drb.rb:629:in
> `recv_reply''
> 20070423-13:36:41 (8456) /usr/lib/ruby/1.8/drb/drb.rb:918:in
> `recv_reply''
> 20070423-13:36:41 (8456) /usr/lib/ruby/1.8/drb/drb.rb:1192:in
> `send_message''
> 20070423-13:36:41 (8456) /usr/lib/ruby/1.8/drb/drb.rb:1083:in
> `method_missing''
> 20070423-13:36:41 (8456) /usr/lib/ruby/1.8/drb/drb.rb:1167:in
`open''
> 20070423-13:36:41 (8456) /usr/lib/ruby/1.8/drb/drb.rb:1082:in
> `method_missing''
> 20070423-13:36:41 (8456) /usr/lib/ruby/1.8/drb/drb.rb:1100:in
> `with_friend''
> 20070423-13:36:41 (8456) /usr/lib/ruby/1.8/drb/drb.rb:1081:in
> `method_missing''
> 20070423-13:36:41 (8456) /usr/lib/ruby/1.8/drb/drb.rb:1069:in
> `respond_to?''
> 20070423-13:36:41 (8456) /usr/lib/ruby/1.8/rexml/xpath_parser.rb:
> 205:in `expr''
> 20070423-13:36:41 (8456) /usr/lib/ruby/1.8/rexml/xpath_parser.rb:
> 203:in `expr''
> 20070423-13:36:41 (8456) /usr/lib/ruby/1.8/rexml/xpath_parser.rb:
> 125:in `match''
> 20070423-13:36:41 (8456) /usr/lib/ruby/1.8/rexml/xpath_parser.rb:56:in
> `parse''
> 20070423-13:36:41 (8456) /usr/lib/ruby/1.8/rexml/xpath.rb:53:in
`each''
> 20070423-13:36:41 (8456) /usr/local/src/rails/434Wireless/lib/workers/
> parser_worker.rb:376:in `do_work''
> 20070423-13:36:41 (8456) /usr/local/src/rails/434Wireless/vendor/
> plugins/backgroundrb/server/lib/backgroundrb/worker.rb:55:in
> `work_thread''
> 20070423-13:36:41 (8456) /usr/local/src/rails/434Wireless/vendor/
> plugins/backgroundrb/server/lib/backgroundrb/worker.rb:69:in
> `work_thread''
> 20070423-13:36:41 (8456) /usr/local/src/rails/434Wireless/vendor/
> plugins/backgroundrb/server/lib/backgroundrb/worker.rb:67:in
> `work_thread''
> 20070423-13:36:41 (8456) /usr/lib/ruby/1.8/drb/drb.rb:1552:in
> `perform_without_block''
> 20070423-13:36:41 (8456) /usr/lib/ruby/1.8/drb/drb.rb:1512:in
> `perform''
> 20070423-13:36:41 (8456) /usr/lib/ruby/1.8/drb/drb.rb:1586:in
> `main_loop''
> 20070423-13:36:41 (8456) /usr/lib/ruby/1.8/drb/drb.rb:1582:in
> `main_loop''
> 20070423-13:36:41 (8456) /usr/lib/ruby/1.8/drb/drb.rb:1578:in
> `main_loop''
> 20070423-13:36:41 (8456) /usr/lib/ruby/1.8/drb/drb.rb:1427:in
`run''
> 20070423-13:36:41 (8456) /usr/lib/ruby/1.8/drb/drb.rb:1424:in
`run''
> 20070423-13:36:41 (8456) /usr/lib/ruby/1.8/drb/drb.rb:1344:in
> `initialize''
> 20070423-13:36:41 (8456) /usr/lib/ruby/1.8/drb/drb.rb:1624:in
> `start_service''
> 20070423-13:36:41 (8456) /usr/lib/ruby/gems/1.8/gems/slave-1.2.0/lib/
> slave.rb:396:in `initialize''
> 20070423-13:36:41 (8456) /usr/lib/ruby/gems/1.8/gems/slave-1.2.0/lib/
> slave.rb:391:in `initialize''
> 20070423-13:36:41 (8456) /usr/local/src/rails/434Wireless/vendor/
> plugins/backgroundrb/server/lib/backgroundrb/middleman.rb:210:in
> `new_worker''
> 20070423-13:36:41 (8456) /usr/local/src/rails/434Wireless/vendor/
> plugins/backgroundrb/server/lib/backgroundrb/thread_pool.rb:36:in
> `dispatch''
> 20070423-13:36:41 (8456) /usr/local/src/rails/434Wireless/vendor/
> plugins/backgroundrb/server/lib/backgroundrb/thread_pool.rb:22:in
> `dispatch''
> 20070423-13:36:41 (8456) /usr/local/src/rails/434Wireless/vendor/
> plugins/backgroundrb/server/lib/backgroundrb/middleman.rb:199:in
> `new_worker''
> 20070423-13:36:41 (8456) /usr/lib/ruby/1.8/drb/drb.rb:1552:in
> `perform_without_block''
> 20070423-13:36:41 (8456) /usr/lib/ruby/1.8/drb/drb.rb:1512:in
> `perform''
> 20070423-13:36:41 (8456) /usr/lib/ruby/1.8/drb/drb.rb:1586:in
> `main_loop''
> 20070423-13:36:41 (8456) /usr/lib/ruby/1.8/drb/drb.rb:1582:in
> `main_loop''
> 20070423-13:36:41 (8456) /usr/lib/ruby/1.8/drb/drb.rb:1578:in
> `main_loop''
> 20070423-13:36:41 (8456) /usr/lib/ruby/1.8/drb/drb.rb:1427:in
`run''
> 20070423-13:36:41 (8456) /usr/lib/ruby/1.8/drb/drb.rb:1424:in
`run''
> 20070423-13:36:41 (8456) /usr/lib/ruby/1.8/drb/drb.rb:1344:in
> `initialize''
> 20070423-13:36:41 (8456) /usr/lib/ruby/1.8/drb/drb.rb:1624:in
> `start_service''
> 20070423-13:36:41 (8456) /usr/local/src/rails/434Wireless/vendor/
> plugins/backgroundrb/server/lib/backgroundrb_server.rb:315:in
`run''
> 20070423-13:36:41 (8456) /usr/lib/ruby/gems/1.8/gems/daemons-1.0.5/lib/
> daemons/application.rb:187:in `start_proc''
> 20070423-13:36:41 (8456) /usr/lib/ruby/gems/1.8/gems/daemons-1.0.5/lib/
> daemons/daemonize.rb:192:in `call_as_daemon''
> 20070423-13:36:41 (8456) /usr/lib/ruby/gems/1.8/gems/daemons-1.0.5/lib/
> daemons/application.rb:191:in `start_proc''
> 20070423-13:36:41 (8456) /usr/lib/ruby/gems/1.8/gems/daemons-1.0.5/lib/
> daemons/application.rb:227:in `start''
> 20070423-13:36:41 (8456) /usr/lib/ruby/gems/1.8/gems/daemons-1.0.5/lib/
> daemons/controller.rb:69:in `run''
> 20070423-13:36:41 (8456) /usr/lib/ruby/gems/1.8/gems/daemons-1.0.5/lib/
> daemons.rb:182:in `run_proc''
> 20070423-13:36:41 (8456) /usr/lib/ruby/gems/1.8/gems/daemons-1.0.5/lib/
> daemons/cmdline.rb:105:in `catch_exceptions''
> 20070423-13:36:41 (8456) /usr/lib/ruby/gems/1.8/gems/daemons-1.0.5/lib/
> daemons.rb:181:in `run_proc''
> 20070423-13:36:41 (8456) /usr/local/src/rails/434Wireless/vendor/
> plugins/backgroundrb/server/lib/backgroundrb_server.rb:301:in
`run''
> 20070423-13:36:41 (8456) script/backgroundrb:29
>
> I tried removing the line that gives the XML version from the top of
> the same test file, and then it crashes where I expect it to, when it
> encounters invalid characters.  Any ideas as to what is happening?
Simon,

What I recommend doing is implementing the worker functionality in a
helper class and then simply delegate from the backgroundrb worker to
the helper.  This way you can unit test the helper and don''t need to
worry about backgroundrb.

# lib/app_xml_helper.rb
class AppXmlHelper

  def self.do_stuff(options={})
    ...
  end

end

# lib/workers/app_xml_worker.rb
class AppXmlWorker < BackgrounDRb::Worker::RailsBase

  def do_work(args)
    AppXmlHelper.do_stuff(args) # delegate
  end

end
AppXmlWorker.register

Now it''s easy to test and you can isolate your biz logic from
backgroundrb.

Hope this helps,

--
Zack Chandler
http://depixelate.com

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Simon

2007-Apr-24 18:06 UTC

head link

Re: backgroundrb and REXML issue

Hi,

Yeah, I''ll try that to try and help figure out what the issue is.
Just one quick question, can I just create that helper class file by
itself, or does it need to be created through the use of any "script/
something ...."?  And do I need to register it with any of my Models
or anything like that, so that the helper class has access to them?

Thanks again,

Simon




On Apr 23, 11:46 pm, "Zack Chandler"
<zackchand...-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
wrote:> > I have an application that receives XML files, and then hands each one
> > off to a backgroundrb worker to parse and store the info.  Everything
> > was working, until I needed to support a larger character set.  So I
> > added the following to the top of my XML files: <?xml
version="1.0"
> > encoding="ISO-8859-1"?>
>
> > Adding this worked fine when I tested it without using backgroundrb.
> > That is, when parsing within the main application, I get the expected
> > behaviour.  However, when I try to hand it off to a worker, I get the
> > following error in backgroundrb.log:
>
> > 20070423-13:36:41 (8456) Connection reset by peer -
> > (DRb::DRbConnError)
> > 20070423-13:36:41 (8456) /usr/lib/ruby/1.8/drb/drb.rb:563:in
`read''
> > 20070423-13:36:41 (8456) /usr/lib/ruby/1.8/drb/drb.rb:563:in
`load''
> > 20070423-13:36:41 (8456) /usr/lib/ruby/1.8/drb/drb.rb:629:in
> > `recv_reply''
> > 20070423-13:36:41 (8456) /usr/lib/ruby/1.8/drb/drb.rb:918:in
> > `recv_reply''
> > 20070423-13:36:41 (8456) /usr/lib/ruby/1.8/drb/drb.rb:1192:in
> > `send_message''
> > 20070423-13:36:41 (8456) /usr/lib/ruby/1.8/drb/drb.rb:1083:in
> > `method_missing''
> > 20070423-13:36:41 (8456) /usr/lib/ruby/1.8/drb/drb.rb:1167:in
`open''
> > 20070423-13:36:41 (8456) /usr/lib/ruby/1.8/drb/drb.rb:1082:in
> > `method_missing''
> > 20070423-13:36:41 (8456) /usr/lib/ruby/1.8/drb/drb.rb:1100:in
> > `with_friend''
> > 20070423-13:36:41 (8456) /usr/lib/ruby/1.8/drb/drb.rb:1081:in
> > `method_missing''
> > 20070423-13:36:41 (8456) /usr/lib/ruby/1.8/drb/drb.rb:1069:in
> > `respond_to?''
> > 20070423-13:36:41 (8456) /usr/lib/ruby/1.8/rexml/xpath_parser.rb:
> > 205:in `expr''
> > 20070423-13:36:41 (8456) /usr/lib/ruby/1.8/rexml/xpath_parser.rb:
> > 203:in `expr''
> > 20070423-13:36:41 (8456) /usr/lib/ruby/1.8/rexml/xpath_parser.rb:
> > 125:in `match''
> > 20070423-13:36:41 (8456) /usr/lib/ruby/1.8/rexml/xpath_parser.rb:56:in
> > `parse''
> > 20070423-13:36:41 (8456) /usr/lib/ruby/1.8/rexml/xpath.rb:53:in
`each''
> > 20070423-13:36:41 (8456) /usr/local/src/rails/434Wireless/lib/workers/
> > parser_worker.rb:376:in `do_work''
> > 20070423-13:36:41 (8456) /usr/local/src/rails/434Wireless/vendor/
> > plugins/backgroundrb/server/lib/backgroundrb/worker.rb:55:in
> > `work_thread''
> > 20070423-13:36:41 (8456) /usr/local/src/rails/434Wireless/vendor/
> > plugins/backgroundrb/server/lib/backgroundrb/worker.rb:69:in
> > `work_thread''
> > 20070423-13:36:41 (8456) /usr/local/src/rails/434Wireless/vendor/
> > plugins/backgroundrb/server/lib/backgroundrb/worker.rb:67:in
> > `work_thread''
> > 20070423-13:36:41 (8456) /usr/lib/ruby/1.8/drb/drb.rb:1552:in
> > `perform_without_block''
> > 20070423-13:36:41 (8456) /usr/lib/ruby/1.8/drb/drb.rb:1512:in
> > `perform''
> > 20070423-13:36:41 (8456) /usr/lib/ruby/1.8/drb/drb.rb:1586:in
> > `main_loop''
> > 20070423-13:36:41 (8456) /usr/lib/ruby/1.8/drb/drb.rb:1582:in
> > `main_loop''
> > 20070423-13:36:41 (8456) /usr/lib/ruby/1.8/drb/drb.rb:1578:in
> > `main_loop''
> > 20070423-13:36:41 (8456) /usr/lib/ruby/1.8/drb/drb.rb:1427:in
`run''
> > 20070423-13:36:41 (8456) /usr/lib/ruby/1.8/drb/drb.rb:1424:in
`run''
> > 20070423-13:36:41 (8456) /usr/lib/ruby/1.8/drb/drb.rb:1344:in
> > `initialize''
> > 20070423-13:36:41 (8456) /usr/lib/ruby/1.8/drb/drb.rb:1624:in
> > `start_service''
> > 20070423-13:36:41 (8456) /usr/lib/ruby/gems/1.8/gems/slave-1.2.0/lib/
> > slave.rb:396:in `initialize''
> > 20070423-13:36:41 (8456) /usr/lib/ruby/gems/1.8/gems/slave-1.2.0/lib/
> > slave.rb:391:in `initialize''
> > 20070423-13:36:41 (8456) /usr/local/src/rails/434Wireless/vendor/
> > plugins/backgroundrb/server/lib/backgroundrb/middleman.rb:210:in
> > `new_worker''
> > 20070423-13:36:41 (8456) /usr/local/src/rails/434Wireless/vendor/
> > plugins/backgroundrb/server/lib/backgroundrb/thread_pool.rb:36:in
> > `dispatch''
> > 20070423-13:36:41 (8456) /usr/local/src/rails/434Wireless/vendor/
> > plugins/backgroundrb/server/lib/backgroundrb/thread_pool.rb:22:in
> > `dispatch''
> > 20070423-13:36:41 (8456) /usr/local/src/rails/434Wireless/vendor/
> > plugins/backgroundrb/server/lib/backgroundrb/middleman.rb:199:in
> > `new_worker''
> > 20070423-13:36:41 (8456) /usr/lib/ruby/1.8/drb/drb.rb:1552:in
> > `perform_without_block''
> > 20070423-13:36:41 (8456) /usr/lib/ruby/1.8/drb/drb.rb:1512:in
> > `perform''
> > 20070423-13:36:41 (8456) /usr/lib/ruby/1.8/drb/drb.rb:1586:in
> > `main_loop''
> > 20070423-13:36:41 (8456) /usr/lib/ruby/1.8/drb/drb.rb:1582:in
> > `main_loop''
> > 20070423-13:36:41 (8456) /usr/lib/ruby/1.8/drb/drb.rb:1578:in
> > `main_loop''
> > 20070423-13:36:41 (8456) /usr/lib/ruby/1.8/drb/drb.rb:1427:in
`run''
> > 20070423-13:36:41 (8456) /usr/lib/ruby/1.8/drb/drb.rb:1424:in
`run''
> > 20070423-13:36:41 (8456) /usr/lib/ruby/1.8/drb/drb.rb:1344:in
> > `initialize''
> > 20070423-13:36:41 (8456) /usr/lib/ruby/1.8/drb/drb.rb:1624:in
> > `start_service''
> > 20070423-13:36:41 (8456) /usr/local/src/rails/434Wireless/vendor/
> > plugins/backgroundrb/server/lib/backgroundrb_server.rb:315:in
`run''
> > 20070423-13:36:41 (8456)
/usr/lib/ruby/gems/1.8/gems/daemons-1.0.5/lib/
> > daemons/application.rb:187:in `start_proc''
> > 20070423-13:36:41 (8456)
/usr/lib/ruby/gems/1.8/gems/daemons-1.0.5/lib/
> > daemons/daemonize.rb:192:in `call_as_daemon''
> > 20070423-13:36:41 (8456)
/usr/lib/ruby/gems/1.8/gems/daemons-1.0.5/lib/
> > daemons/application.rb:191:in `start_proc''
> > 20070423-13:36:41 (8456)
/usr/lib/ruby/gems/1.8/gems/daemons-1.0.5/lib/
> > daemons/application.rb:227:in `start''
> > 20070423-13:36:41 (8456)
/usr/lib/ruby/gems/1.8/gems/daemons-1.0.5/lib/
> > daemons/controller.rb:69:in `run''
> > 20070423-13:36:41 (8456)
/usr/lib/ruby/gems/1.8/gems/daemons-1.0.5/lib/
> > daemons.rb:182:in `run_proc''
> > 20070423-13:36:41 (8456)
/usr/lib/ruby/gems/1.8/gems/daemons-1.0.5/lib/
> > daemons/cmdline.rb:105:in `catch_exceptions''
> > 20070423-13:36:41 (8456)
/usr/lib/ruby/gems/1.8/gems/daemons-1.0.5/lib/
> > daemons.rb:181:in `run_proc''
> > 20070423-13:36:41 (8456) /usr/local/src/rails/434Wireless/vendor/
> > plugins/backgroundrb/server/lib/backgroundrb_server.rb:301:in
`run''
> > 20070423-13:36:41 (8456) script/backgroundrb:29
>
> > I tried removing the line that gives the XML version from the top of
> > the same test file, and then it crashes where I expect it to, when it
> > encounters invalid characters.  Any ideas as to what is happening?
>
> Simon,
>
> What I recommend doing is implementing the worker functionality in a
> helper class and then simply delegate from the backgroundrb worker to
> the helper.  This way you can unit test the helper and don''t need
to
> worry about backgroundrb.
>
> # lib/app_xml_helper.rb
> class AppXmlHelper
>
>   def self.do_stuff(options={})
>     ...
>   end
>
> end
>
> # lib/workers/app_xml_worker.rb
> class AppXmlWorker < BackgrounDRb::Worker::RailsBase
>
>   def do_work(args)
>     AppXmlHelper.do_stuff(args) # delegate
>   end
>
> end
> AppXmlWorker.register
>
> Now it''s easy to test and you can isolate your biz logic from
backgroundrb.
>
> Hope this helps,
>
> --
> Zack Chandlerhttp://depixelate.com

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Zack Chandler

2007-Apr-25 14:23 UTC

head link

Re: backgroundrb and REXML issue

> Yeah, I''ll try that to try and help figure out what the issue is.
> Just one quick question, can I just create that helper class file by
> itself, or does it need to be created through the use of any "script/
> something ...."?  And do I need to register it with any of my Models
> or anything like that, so that the helper class has access to them?
>
Simon,

Yes, just drop the helper class file in lib/ and you should be good to
go.  You will have access to your models.

--
Zack Chandler
http://depixelate.com

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Simon

2007-Apr-25 14:53 UTC

head link

Re: backgroundrb and REXML issue

Zack,

I tried that, and I get the following error:

20070425-10:51:11 (22978) undefined method `store_xml'' for
XmlHelper:Class - (NoMethodError)
20070425-10:51:11 (22978) /usr/local/src/rails/434Wireless/lib/workers/
parser_worker.rb:329:in `do_work''

store_xml is the function in my XmlHelper class, which is located at
lib/xml_helper.rb.  I''ve restarted both servers after adding the file
and making the changes.  Any idea on what I''m still missing?

Thanks again,

Simon


On Apr 25, 10:23 am, "Zack Chandler"
<zackchand...-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
wrote:> > Yeah, I''ll try that to try and help figure out what the issue
is.
> > Just one quick question, can I just create that helper class file by
> > itself, or does it need to be created through the use of any
"script/
> > something ...."?  And do I need to register it with any of my
Models
> > or anything like that, so that the helper class has access to them?
>
> Simon,
>
> Yes, just drop the helper class file in lib/ and you should be good to
> go.  You will have access to your models.
>
> --
> Zack Chandlerhttp://depixelate.com

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Zack Chandler

2007-Apr-25 16:10 UTC

head link

Re: backgroundrb and REXML issue

> I tried that, and I get the following error:
>
> 20070425-10:51:11 (22978) undefined method `store_xml'' for
> XmlHelper:Class - (NoMethodError)
> 20070425-10:51:11 (22978) /usr/local/src/rails/434Wireless/lib/workers/
> parser_worker.rb:329:in `do_work''
>
> store_xml is the function in my XmlHelper class, which is located at
> lib/xml_helper.rb.  I''ve restarted both servers after adding the
file
> and making the changes.  Any idea on what I''m still missing?
>
Check that store_xml is defined as a class method:

class XmlHelper
  def self.store_xml(args)
  end
end

--
Zack Chandler
http://depixelate.com

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Simon

2007-Apr-25 18:04 UTC

head link

Re: backgroundrb and REXML issue

That was it.  Thanks again.

Simon

On Apr 25, 12:10 pm, "Zack Chandler"
<zackchand...-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
wrote:> > I tried that, and I get the following error:
>
> > 20070425-10:51:11 (22978) undefined method `store_xml'' for
> > XmlHelper:Class - (NoMethodError)
> > 20070425-10:51:11 (22978)
/usr/local/src/rails/434Wireless/lib/workers/
> > parser_worker.rb:329:in `do_work''
>
> > store_xml is the function in my XmlHelper class, which is located at
> > lib/xml_helper.rb.  I''ve restarted both servers after adding
the file
> > and making the changes.  Any idea on what I''m still missing?
>
> Check that store_xml is defined as a class method:
>
> class XmlHelper
>   def self.store_xml(args)
>   end
> end
>
> --
> Zack Chandlerhttp://depixelate.com

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Rails - Apr 2007 - backgroundrb and REXML issue

backgroundrb and REXML issue

Re: backgroundrb and REXML issue

Re: backgroundrb and REXML issue

Re: backgroundrb and REXML issue

Re: backgroundrb and REXML issue

Re: backgroundrb and REXML issue

Re: backgroundrb and REXML issue