Class: ARII::JSONDetector

Inherits:
Detector show all
Defined in:
lib/arii/jsondetector.rb

Overview

JSONDetector

Detect changes in JSON content files (uses JSONPath).

Instance Attribute Summary

Attributes inherited from Detector

#agent, #content, #identifier, #objects, #payloads, #templates

Instance Method Summary collapse

Methods inherited from Detector

#checkup, #initialize

Constructor Details

This class inherits a constructor from ARII::Detector

Instance Method Details

#detect(object) ⇒ Object

Detect the changes



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# File 'lib/arii/jsondetector.rb', line 19

def detect object
  ARII::Config.log.info(self.class.name) { "Monitoring #{object[:uri]}" } unless object[:uri].nil?

  begin
    if object[:uri] == '' then
      @doc = object[:content]
    else
      url = RestClient.get object[:uri]
      @doc = url.to_str
    end
    JsonPath.on(@doc, object[:query]).each do |element|
      JsonPath.on(element, object[:cache]).each do |c|
        @response = Cashier.verify c, object, c, object[:seed]
      end

      # Process ARII cache response
      @cache = JSON.parse(@response, {:symbolize_names => true})
      unless @cache[:templates].nil? then
        @cache[:templates].each do |t|
          @templates.push t
        end
      end

      ##
      # If not on cache, add to payload for processing
      #
      if @cache[:cache][:status] == 100 then
        ARII::Config.log.info(self.class.name) { "Not on cache, generating payload" }
        # add row data to payload from selectors (key => key, value => column name)
        payload = Hash.new
        object[:selectors].each do |selector|
          selector.each do |k, v|
            JsonPath.on(element, v).each do |el|
              payload[k] = el
            end
          end
        end
        # add payload object to payloads list
        @payloads.push payload
      end

    end
  rescue Exception => e
    ARII::Config.log.error(self.class.name) { "Loading error: #{e}" }
  end
  @cache[:templates]
end