Class: Jcr

Inherits:
Service show all
Includes:
MetadataHelper
Defined in:
app/service_adaptors/jcr.rb

Overview

Link to Thomson JCR impact report for journal title.

REQUIREMENTS: You must be an ISI customer if you want these links to actually work for your users. Off-campus users should be sent through EZProxy, see the EZProxy plug-in.

You need to register for the the Thomson ‘Links Article Match Retrieval’ (LAMR) service api, which is used here (and also in the Isi plugin). To register, see: wokinfo.com/products_tools/products/related/amr/

You register by IP address, so no auth info is needed once your registration goes through – or you can receive a username and password, in which case you should configure keys ‘username’ and ‘password’

If you later need to change the IP addresses entitled to use this API, use scientific.thomson.com/scientific/techsupport/cpe/form.html. to request a change.

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 included from MetadataHelper

#get_doi, #get_epage, #get_gpo_item_nums, #get_identifier, #get_isbn, #get_issn, #get_lccn, #get_month, #get_oclcnum, #get_pmid, #get_search_creator, #get_search_terms, #get_search_title, #get_spage, #get_sudoc, #get_top_level_creator, #get_year, #normalize_lccn, #normalize_title, #raw_search_title, title_is_serial?

Methods included from MarcHelper

#add_856_links, #edition_statement, #get_title, #get_years, #gmd_values, #service_type_for_856, #should_skip_856_link?, #strip_gmd

Methods inherited from Service

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

Constructor Details

#initialize(config) ⇒ Jcr

Returns a new instance of Jcr.



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# File 'app/service_adaptors/jcr.rb', line 35

def initialize(config)
  #defaults
  @wos_app_name = "Umlaut"
  @display_name = "Journal Citation Reports\xc2\xae" # trademark symbol, utf-8
  @link_text = "Journal impact factor"
  @api_url = "https://ws.isiknowledge.com/cps/xrpc"
  @include_for_article_level = true
  
  @credits = {
    @display_name => "http://thomsonreuters.com/products_services/science/science_products/a-z/journal_citation_reports/"
  }
  
  super(config)
end

Instance Method Details

#add_responses(request, isi_response) ⇒ Object 



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# File 'app/service_adaptors/jcr.rb', line 128

def add_responses(request, isi_response)
  # raise if it's an HTTP error code
  isi_response.value
  
  nokogiri = Nokogiri::XML(isi_response.body)

  # Check for errors.
  if (error = (nokogiri.at('val[@name = "error"]') || nokogiri.at('error') || nokogiri.at('null[@name = "error"]')))
    raise Exception.new("Third party service error: #{error.inner_text}")
  end


  results = nokogiri.at('map[@name ="cite_id"] map[@name="JCR"]')

  impact_url = results.at('val[@name ="impactGraphURL"]')
  
  if (impact_url )
    request.add_service_response(:service=>self, 
      :display_text => @link_text,          
      :url => impact_url.inner_text, 
      :service_type_value => :highlighted_link,
      :debug_info => "url: #{impact_url.inner_text}")
  end
  
  
end

#do_lamr_request(xml) ⇒ Object 



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# File 'app/service_adaptors/jcr.rb', line 118

def do_lamr_request(xml)
  uri = URI.parse(@api_url)
  http = Net::HTTP.new(uri.host, uri.port)
  http.use_ssl = true if (uri.scheme == 'https')

  headers = {'Content-Type' => 'application/xml'}
  
  return http.post(uri.request_uri, xml, headers)
end

#gen_lamr_request(request) ⇒ Object

produces XML to be posted to Thomson ‘Links Article Match Retrieval’ service api.



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# File 'app/service_adaptors/jcr.rb', line 71

def gen_lamr_request(request)
  output = ""
  
  builder = Builder::XmlMarkup.new(:target => output, :indent => 2)
  builder.instruct!(:xml, :encoding => "UTF-8")    

  builder.request(:xmlns => "http://www.isinet.com/xrpc41", :src => "app.id=Umlaut") do
    builder.fn(:name => "LinksAMR.retrieve") do
      builder.list do
        # first map is authentication info. empty 'map' element if we are IP authenticated.
        if @username && @password
          builder.map do
            builder.val(@username, :name => "username")
            builder.val(@password, :name => "password")
          end
        else
          builder.map
        end

        # specify what we're requesting
        builder.map do
          builder.list(:name=>"JCR") do
            builder.val("impactGraphURL")              
          end
        end
        # specify our query
        builder.map do            
          builder.map(:name => "cite_id") do
            metadata = request.referent.metadata
            if (issn = request.referent.issn)                              
              issn = issn[0,4] + '-' + issn[4,7] unless issn =~ /\-/
              builder.val(issn, :name => "issn")
            end
            # Journal title.  
            if (! metadata['jtitle'].blank? )
              builder.val(metadata['jtitle'], :name => "stitle" )
            elsif (! metadata['title'].blank? )
              builder.val(metadata['title'], :name => 'stitle' )
            end
          end
        end          
      end
    end
  end
  return output
end

#handle(request) ⇒ Object 



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# File 'app/service_adaptors/jcr.rb', line 50

def handle(request)
  
  unless ( sufficient_metadata?(request.referent))
     return request.dispatched(self, true)
  end
      
  xml = gen_lamr_request(request)
  
  isi_response = do_lamr_request(xml)
  
  add_responses( request, isi_response )
  
  return request.dispatched(self, true)
end

#service_types_generated ⇒ Object 



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# File 'app/service_adaptors/jcr.rb', line 31

def service_types_generated
  return [ServiceTypeValue[:highlighted_link]]
end

#sufficient_metadata?(referent) ⇒ Boolean

Need an ISSN.

Returns:

  • (Boolean) 


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# File 'app/service_adaptors/jcr.rb', line 66

def sufficient_metadata?(referent)
  return ! referent.issn.blank? 
end