System Gems

The following gems and code libraries are supported because they either have binary dependencies or they are very large gems. To use the ones on this list, simply use a require at the top of your worker.

bson_ext 

curb 

em-http-request 

eventmachine 

mysql2 

net-scp 

net-sftp 

net-ssh 

nokogiri

rmagick # Use require 'RMagick'

sqlite3 

typhoeus

yajl-ruby

Here's an example of all that you need to do to make use of one of these supported gems:

require 'iron_worker'
require 'nokogiri'

class PageWorker < IronWorker::Base

  def run
    ...
   end
end

We update the gems on a regular basis. And while older versions may be retained, if you need a specific version, we recommend using the merge_gem command to bring in the specific version you need.

merge_gem "some_other_gem_with_version", "1.2.3"

Unmerging Binary Gems

In some situations you may receive errors with respect to system gems. In these cases, you made need to unmerge it. One reason for this is because it could be a binary gem and with the auto-merging of dependencies, binary gems might be loaded but not able to execute within IronWorker. (Many binary gems are included in the IronWorker system for just this reason.)

unmerge_gem 'nokogiri'