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1. generate the app:
merb-gen app pooltesting --orm datamapper
2. add the setup string to config/environments/development.rb
Merb::BootLoader.after_app_loads do
DataMapper.setup(:default, 'mysql://root@localhost/test')
end
3. generate a resource
merb-gen resource tester
4. add route to config/router.rb:
resources :testers
5. define model in tester.rb
property :id, Serial, :key => true
property :name, String
6. automigrate
rake dm:db:automigrate
7. add some data
$ merb -i
Tester.create(:name => "mattetti")
8. start the merb cluster
$ merb -c2 -n
9. test with a browser
http://localhost:4000/testers/
FAIL undefined method `link_to' for #<Testers:0x1212784>
10. edit init.rb
uncomment dependency "merb-assets"
11. restart the server
$ ctrl + c
$ merb -c2 -n
12. browser testing
http://localhost:4000/testers/
13. put under load
$ ab -c 2 -n 5000 http://0.0.0.0:4000/testers/ (in a different shell)
14. change a model
in your editor save the model a few times (10-15 times in a row)
15. look at merb console:
merb: worker (port 4000) ~ Starting Mongrel at port 4000
merb: worker (port 4000) ~ Couldn't bind to port 4000.
merb: worker (port 4000) ~ Waiting for it to become available
Fri Oct 03 18:23:53 -0700 2008: Reaping 1 threads for slow workers because of 'shutdown'
Waiting for 1 requests to finish, could take 60.0 seconds.
Fri Oct 03 18:23:59 -0700 2008: Reaping 1 threads for slow workers because of 'shutdown'
Waiting for 1 requests to finish, could take 60.0 seconds.
Fri Oct 03 18:24:05 -0700 2008: Reaping 1 threads for slow workers because of 'shutdown'
Waiting for 1 requests to finish, could take 60.0 seconds.
Fri Oct 03 18:24:11 -0700 2008: Reaping 1 threads for slow workers because of 'shutdown'
Waiting for 1 requests to finish, could take 60.0 seconds.
Fri Oct 03 18:24:17 -0700 2008: Reaping 1 threads for slow workers because of 'shutdown'
Waiting for 1 requests to finish, could take 60.0 seconds.
Fri Oct 03 18:24:23 -0700 2008: Reaping 1 threads for slow workers because of 'shutdown'
Waiting for 1 requests to finish, could take 60.0 seconds.
Fri Oct 03 18:24:29 -0700 2008: Reaping 1 threads for slow workers because of 'shutdown'
Waiting for 1 requests to finish, could take 60.0 seconds.
Fri Oct 03 18:24:35 -0700 2008: Reaping 1 threads for slow workers because of 'shutdown'
Waiting for 1 requests to finish, could take 60.0 seconds.
merb: worker (port 4000) ~ Exiting port 4000
merb: worker (port 4000) ~ Successfully bound to port 4000
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