Class: SfxBackchannelRecord

Inherits:
Service
  • Object
show all
Defined in:
app/service_adaptors/sfx_backchannel_record.rb

Constant Summary

Constants inherited from Service

Service::LinkOutFilterTask, Service::StandardTask

Instance Attribute Summary

Attributes inherited from Service

#group, #name, #priority, #request, #service_id, #status, #task, #url

Instance Method Summary collapse

Methods inherited from Service

#credits, #display_name, #handle_wrapper, #preempted_by, required_config_params, #response_url, #service_types_generated, #translate

Constructor Details

#initialize(config) ⇒ SfxBackchannelRecord

Returns a new instance of SfxBackchannelRecord.



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# File 'app/service_adaptors/sfx_backchannel_record.rb', line 19

def initialize(config)
  @display_name = "SFX Statistics"
  super(config)
  @timeout ||= 5
end

Instance Method Details

#handle(request) ⇒ Object

This is meant to be called as task:link_out_filter, it doesn’t have an implementation for handle, it implements link_out_filter() instead.



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# File 'app/service_adaptors/sfx_backchannel_record.rb', line 27

def handle(request)
   raise "Not implemented."
end

#link_out_filter(orig_url, service_response, other_args = {}) ⇒ Object

Hook method called by Umlaut. We always return nil because we aren’t interested in modifying the url, just using the callback to record the click with SFX.



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# File 'app/service_adaptors/sfx_backchannel_record.rb', line 34

def link_out_filter(orig_url, service_response, other_args = {})
  # Only work on responses that came from SFX.
  unless (service_response.service.class.to_s == "Sfx")
     return nil
  end
  make_backchannel_request( service_response )
  
  
  return nil
end

#make_backchannel_request(service_response) ⇒ Object

Does everything in a background thread to avoid slowing down the user.



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# File 'app/service_adaptors/sfx_backchannel_record.rb', line 46

def make_backchannel_request(service_response)

  Thread.new do
    begin
      direct_sfx_url = Sfx.pass_through_url(service_response.data_values)
      # now we call that url through a back channel just to record it
      # with SFX.
      
      parsed_uri = URI.parse(direct_sfx_url )
      sfx_response = Net::HTTP.get_response( parsed_uri  )
      
      #raise if not 200 OK response
      unless ( sfx_response.kind_of?(Net::HTTPSuccess) ||
               sfx_response.kind_of?(Net::HTTPRedirection) )
             # raise
             sfx_response.value
      end                
    rescue Exception => e
      Rails.logger.error("Could not record sfx backchannel click for service_response id #{service_response.id} ; sfx backchannel url attempted: #{direct_sfx_url} ; problem: #{e}")
      Rails.logger.error( e.backtrace.join("\n"))
    end
  end
end