May 21
Update: Do not forget to get rid of autogenerated backgroundrb etcetera files that were generated during last run of rake backgroundrb:setup.
A plain fork() is evil under Ruby and hence there are some issues with memory usage of BackgrounDRb. I have made some changes to packet library so as it uses fork and exec rather than just fork for better memory usage. However, there were quite bit of changes and BackgrounDRb is affected by them. You can try bleeding edge version as following.Also you need rspec for building packet gem.
clone the packet git repo:
git clone git://github.com/gnufied/packet.git cd packet;rake gem cd pkg; sudo gem install --local packet-0.1.6.gem
Go to your vendor/plugins directory of your rails directory and remove or
backup older version of backgroundrb plugin and backup related config
file as well.
from vendor/plugins directory:
git clone git://github.com/gnufied/backgroundrb.git cd RAILS_ROOT rake backgroundrb:setup ./script/backgroundrb start
Let me know,how it goes.
Hey Hemant,
I’m running this version but I have problems when I try to get data using a model that uses a acts_as_list plugin. Do I need to add something to my code to get this to work?
~ mel
Melvin Ram
4 Jun 08 at 1:23 pm
Thanks for your report. I will test this and try to fix it asap.
Hemant
6 Jun 08 at 5:09 am
Hi Hemant,
using the released packet gem and backgroundrb i got errors as mentioned in http://rubyforge.org/pipermail/backgroundrb-devel/2008-May/001768.html …
the bleeding edge version seems to work for me now - thank you!
best
Paul
Paul
6 Jun 08 at 5:48 am
Melvin,
Models, which make use of AR plugins are now working with git version of bdrb. Give it a try and let me know.
Hemant
10 Jun 08 at 1:35 am
[...] http://gnufied.org/2008/05/21/bleeding-edge-version-of-backgroundrb-for-better-memory-usage/ [...]
A Place for my head » Unthreaded threads of hobbiton
12 Jun 08 at 3:46 pm
Hi Hemant,
this is a great plugin - I sure would give my 1 if you’d consider pushing for including it with Rails 2.2!!
Anywas, I’m not sure if the above patch to packet applies to me - I’m on packet 0.1.5, and my backgrounDRB Changelog has last entry 2008-02-28
My problem is that I can do
invoice = Invoice.find(26)
invoice.print_invoice “some_path_and_filename”
from the script/console just perfectly
But when I try calling invoice.print_invoice from my billing_worker.rb - it gives me the first logger.info - and that is it. I do not know if I can debug it any further - and I do not know if there is some Rails specific environment, I’m missing!
I’ve attached my billing_worker if you can see me doing something terribly wrong (I know it’s not really sleak and elegant code) - can you spot it will not fly?
cheers,
walt
class BillingWorker < BackgrounDRb::MetaWorker
set_worker_name :billing_worker
def create(args = nil)
# this method is called, when worker is loaded for the first time
logger.info “Faktura baggrundsjob startet!”
end
def build_invoice(invoice_id = nil)
invoice = Invoice.find(invoice_id) unless invoice_id.nil?
logger.info “Faktura ID #{invoice_id} skal dannes!” # I only reach this!
unless invoice.nil?
result = false
logger.info “Faktura ID #{invoice_id} dannes!”
result = invoice.print_invoice “public/forms/invoices/html/#{invoice.invoice_number}.html”
#result = %x[script/get_invoice #{invoice.id} #{invoice.invoice_number}]
if result
logger.info “Faktura nr #{invoice.invoice_number} blev dannet - som HTML!”
result = %x[script/get_invoice_pdf #{invoice.invoice_number} #{invoice.invoice_number}]
#result=false
if result
logger.info “Faktura nr #{invoice.invoice_number} blev dannet - som PDF!”
invoice.pdf_resource = “forms/invoices/pdf/#{invoice.invoice_number}.pdf”
invoice.invoice_items.each { |ii| Task.find(ii.task_id).update_attribute( :invoiced_at, DateTime.now) unless ii.task_id.nil? }
invoice.save
logger.info “Faktura nr #{invoice.invoice_number} blev dannet med faktura linier!”
else
logger.info “Faktura med ID #{invoice_id} blev ikke dannet - som PDF!”
end
else
logger.info “Faktura med ID #{invoice_id} blev ikke dannet - som HTML!”
end
else
logger.info “Faktura med ID #{invoice_id} blev ikke fundet!”
end
end
end
Walther
13 Jun 08 at 8:55 pm
Hi Hemant,
it’s me (again) > worker = MiddleMan.worker(:billing_worker)
=> #
>> worker.build_invoice(27)
{:type=>:do_work, :worker_method=>:build_invoice, :worker=>:billing_worker, :data=>27}
=> nil
>>
I get this:
# script/backgroundrb
true
/Library/Ruby/Gems/1.8/gems/activesupport-2.0.2/lib/active_support/dependencies.rb:478:in `const_missing’: uninitialized constant Invoice::ApplicationController (NameError)
from /Users/walther/Documents/RailsProjects/froeslev/app/models/invoice.rb:98:in `render_string’
from /Users/walther/Documents/RailsProjects/froeslev/app/models/invoice.rb:62:in `render_to_string’
from /Users/walther/Documents/RailsProjects/froeslev/app/models/invoice.rb:47:in `print_invoice’
from /Users/walther/Documents/RailsProjects/froeslev/lib/workers/billing_worker.rb:15:in `build_invoice’
from /Users/walther/Documents/RailsProjects/froeslev/vendor/plugins/backgroundrb/server/lib/meta_worker.rb:235:in `send’
from /Users/walther/Documents/RailsProjects/froeslev/vendor/plugins/backgroundrb/server/lib/meta_worker.rb:235:in `process_request’
from /Users/walther/Documents/RailsProjects/froeslev/vendor/plugins/backgroundrb/server/lib/meta_worker.rb:219:in `receive_data’
from /Library/Ruby/Gems/1.8/gems/packet-0.1.5/lib/packet/packet_worker.rb:53:in `receive_internal_data’
… 15 levels…
from /Library/Ruby/Gems/1.8/gems/packet-0.1.5/lib/packet/packet_master.rb:20:in `run’
from /Users/walther/Documents/RailsProjects/froeslev/vendor/plugins/backgroundrb/server/lib/master_worker.rb:166:in `initialize’
from script/backgroundrb:60:in `new’
from script/backgroundrb:60
Walther
13 Jun 08 at 9:10 pm
Hi Hemant,
sorry to post wall-to-wall comments - false
File.open(path_and_file, “w “) do |f|
f.puts( htmlstring)
f.close
end
true
# rescue
# false
end
Walther
13 Jun 08 at 9:17 pm
Okay,
so I try just once more
I wanted to show you that when I call my invoice.print_invoice from the console - everything is ok - but when I call it from my billing_worker - I only get the logger to write the first logger.info entry, and it does not finish work at all.
the first comment holds my billing_worker, the next comment shows how I call the worker from the console - and the stack trace from backgrounDRB started without the start argument. the comment right above shows the print_invoice method in my invoice.rb model
can you help me?
cheers,
walt
Walther
13 Jun 08 at 9:23 pm
Walther,
It would be a good idea to contact mailing list for such questions. But anyways, I guess, looks like you need to require some controller that you are using in your model or some crap like that. Wordpress is not letting code pass cleanly and hence you can use pastie to paste the code.
Hemant
14 Jun 08 at 11:51 am
I agree there should be a mailing list for asking questions and answering them as I didn’t know there was an update to my question till today.
I vote for using Google Groups.
PS: Thanks Hemant for the update. I give it a go over the next week.
Melvin Ram
17 Jul 08 at 9:16 am
Melvin:
There is already one:
http://rubyforge.org/mailman/listinfo/backgroundrb-devel
Hemant
17 Jul 08 at 9:46 am
Really Important is to REMOVE THE OLD FILES GENERATED FROM backgroundrb:setup!
This saved my day (and night probably too).
Thanks for sharing,
Have a nice day!
Lukas
Lukas Rieder
22 Jul 08 at 9:01 am
[...] the worker control code now is totally changed, and the Worker class itself needs to inherit from BackgrounDRb::MetaWorker now. Having taken care of these and a few other cleanups, we seem to be running with a much smaller [...]
chirp.syxyz.net » Blog Archive » upgrading backgroundrb, the fun way.
28 Jul 08 at 2:22 pm