Class: MonitorTypeHttpGetJsonList

Inherits:
MonitorTypeThreshold show all
Defined in:
lib/monitor_type/http_get_json_list.rb

Overview

An http class for checking the length of a json list. For example,

Get the list of outstandinig errors
=> check that the number is not greater than 2

Instance Method Summary collapse

Methods inherited from MonitorTypeThreshold

#check, #initialize, #process

Methods inherited from MonitorType

#alert, #initialize, #process, #run, #setup, #teardown

Constructor Details

This class inherits a constructor from MonitorTypeThreshold

Instance Method Details

#derived_value ⇒ Object 



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# File 'lib/monitor_type/http_get_json_list.rb', line 32

def derived_value
  content = RestClient.get(@uri.to_s)
  list = JSON.parse(content)
  str = "Expected type, Array - Actual type, #{list.class.name}"
  fail MonitorTypeExceptionHandled, str unless list.class.name == 'Array'
  list.length
rescue MonitorTypeExceptionHandled
  raise e

rescue StandardError
  string = '*** HttpGetJsonList encountered an error while running the ' \
           'HTTP Get\n' \
           "*** uri: #{@uri}\n" \
            "*** Please fix the query and run again\n"
  raise MonitorTypeExceptionHandled, string
end

#extract_params ⇒ Object

Extract parameters

Parameters:

  • uri (String) —

    Connection string to db

  • sql (String) —

    SQL statement to gather a single value



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# File 'lib/monitor_type/http_get_json_list.rb', line 12

def extract_params
  if @params[:uri].nil?
    string = "*** HttpGetJsonList parameter missing, uri\n" \
             '*** :uri => <uri pointing to url to be monitored>'
    fail MonitorTypeParameterMissingError, string
  end

  begin
    @uri = URI.parse(@params[:uri])
  rescue URI::InvalidURIError
    str = '*** HttpGetJsonList encountered an error while parsing the uri' \
          "*** uri: #{@params[:uri]}" \
          '*** Please fix the uri and run again'
    raise MonitorTypeParameterMissingError, str
  end

  url = "#{@uri.scheme}://#{@uri.host}#{@uri.path}"
  @context_sentence = "Checking size of json list returned from, #{url}"
end