Jyotsna oswal's Profile

#
# Install Tomcat and the admin webapps.
yum install tomcat5
yum install tomcat5-webapps
yum install tomcat5-admin-webapps

Example 1: Delay Something

Now the fun part: pick something to delay. A great place for delay is email. I’ve seen places where apps have broken due to email not being able to send. Maybe the client changed their email server and didn’t tell the programmer, or maybe the mail server was temporarily down for maintenance. Either way, it generally shouldn’t stop our app.

Jobs are simple ruby objects with a method called perform. Any object which responds to perform can be stuffed into the jobs table.

Job objects are serialized to yaml so that they can later be resurrected by the job runner.

class NewsletterJob < Struct.new(:text, :emails)
def perform
emails.each { |e| NewsletterMailer.deliver_text_to_email(text, e) }
end
end

Delayed::Job.enqueue NewsletterJob.new(‘lorem ipsum…’, Customers.find(:all).collect(&:email))

There is also a second way to get jobs in the queue: send_later.

BatchImporter.new(Shop.find(1)).send_later(:import_massive_csv, massive_csv)

This will simply create a Delayed::PerformableMethod job in the jobs table which serializes all the parameters you pass to it. There are some special smarts for active record objects

which are stored as their text representation and loaded from the database fresh when the job is actually run later.

My favorite one so far is:
delayed_job. Because its
simple to set up, simple to use and has lot of powerful features. However,
don’t forget to look at others to see what fits you needs and style
better. For an overview see here. In the rest of the article, I will explain how to install and use delayed_job.

I believe it should be ActionMailer::Base.smtp_settings, not server_settings

if RAILS_ENV != 'test'
email_settings = YAML::load(File.open("#{RAILS_ROOT}/config/email.yml"))
ActionMailer::Base.smtp_settings = email_settings[RAILS_ENV] unless email_settings[RAILS_ENV].nil?
end

And then create #{RAILS_ROOT}/config/email.yml with the following

root@host# apt-get install subversion
Reading package lists... Done
Building dependency tree... Done
The following extra packages will be installed:
db4.2-util libsvn0
Suggested packages:
subversion-tools
The following NEW packages will be installed:
db4.2-util libsvn0 subversion
0 upgraded, 3 newly installed, 0 to remove and 0 not upgraded.
Need to get 1821kB of archives.
After unpacking 6279kB of additional disk space will be used.
Do you want to continue [Y/n]?

root@host# apt-get install apache2
root@host# apt-get install subversion-tools
root@hotst apt-get install libsvn0

cd /usr/local/src/



wget http://subversion.tigris.org/downloa...n-1.4.5.tar.gz

wget http://subversion.tigris.org/downloa...s-1.4.5.tar.gz

wget http://www.sqlite.org/sqlite-3.5.2.tar.gz



tar xzf subversion-1.4.5.tar.gz

tar xzf subversion-deps-1.4.5.tar.gz

tar xzf sqlite-3.5.2.tar.gz



cd sqlite-3.5.2

./configure

make

make install

./sqlite3

.help

.exit

cd ..



cd subversion-1.4.5

./configure

make

make install

svn --version

"yum install subversion"

$ hgimportsvn http://url.to.repo/repo
...^^^Sets up the import
$ cd repo
...^^^Changes to the freshly created subdir
$ hgpullsvn
...^^^Pulls down all the changes from svn and creates an hg history
$ hg update (optional)