Hello,
I'm trying to learn how to use BackgroundRB to run a long running process while
showing status to the user via a webpage.
1. I tried using Advanced Rails Recipe 43, however, it appears as though
backgroundrb has been updated since that book was published (2 months ago) as
methods like "register_status", "ask_stutus" no longer exist.
2. I tried reading the everything on http://backgroundrb.rubyforge.org/
3. I tried to update the recipe code with what I learned from reading the
backgroundrb webpage
4. I failed spectacularly
Here's my code reworked to be simpler:
---------------
class BillingWorker < BackgrounDRb::MetaWorker
set_worker_name :billing_worker
set_no_auto_load(true)
def create(args = nil)
cache[worker_key] = 0
index = 0
args.times do
sleep(4)
index = index + 1
cache[worker_key] =(index * 100) / args
end
exit
end
end
class PaymentsController < ApplicationController
def async_test
session[:job_key] = Bill.find(1).start_test
redirect_to :action => 'check_async_test_status'
end
def check_async_test_status
@percent_complete = Bill.test_status(session[:job_key])
if request.xhr?
if @percent_complete == 100
render :update do |page|
flash[:notice] = "test is complete"
session[:job_key] = nil
page.redirect_to :action => "pending"
end
else
render :update do |page|
page[:billingStatus].setStyle :width => "[EMAIL PROTECTED] *2}px"
page[:billingStatus].replace_html "[EMAIL PROTECTED]"
end
end
end
end
end
class Bill < ActiveRecord::Base
def start_test
MiddleMan.new_worker(:worker => :billing_worker, :worker_key => "foobar",
:data => 5)
end
def self.test_status(job_key)
MiddleMan.worker(:billing_worker, "foobar").ask_result(job_key)
# also tried MiddleMan.worker(:billing_worker).ask_result(job_key)
end
end
---------------
hitting /payments/async_test always results in
Packet::InvalidWorker
/usr/local/lib/ruby/gems/1.8/gems/packet-0.1.8/lib/packet/packet_connection.rb:52:in
`ask_worker'
/home/derrek/repos/prod/riderway/trunk/vendor/plugins/backgroundrb/server/lib/master_worker.rb:123:in
`get_result_object'
I can't seem to get at the cache[worker_key] value. Any help would be greatly
appreciated.
Thanks,
-Derrek
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