CommonAjaxCall.coffee

# Common way of making async call via underlying Ext.Ajax call
loadCompanies: ->
  @companyService.loadCompanies(
    success: ( response ) ->
      results = Ext.decode( response.responseText )
      # Do something with results
      # Do something whether the call succeeded or failed

    failure: ( response ) ->
      # Do something with the error
      # Do something whether the call succeeded or failed
)

# CompanyService method using Ext.Ajax call
loadCompanies: ( config ) ->
  Ext.Ajax.request(
    url: "company/loadCompanies.json"
    success: config.success
    failure: config.failure
  )