Class: ServiceStore

Inherits:
Object
  • Object
show all
Defined in:
app/models/service_store.rb

Overview

Loads Service definitions from Rails.root/config/umlaut_services.yml instantiates services from definitions, by id.

It’s terrible we need to do this globally like this, but too hard to back out of legacy design now.

Class Method Summary collapse

Class Method Details

.config ⇒ Object

Returns complete hash loaded from services.yml



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# File 'app/models/service_store.rb', line 9

def self.config
  # cache hash loaded from YAML, ensure it has the keys we expect. 
  unless defined? @@services_config_list
    yaml_path = File.expand_path("config/umlaut_services.yml", Rails.root)
    if File.exists? yaml_path
      @@services_config_list = YAML::load(File.open( yaml_path ))        
    else
      @@services_config_list = {}
    end
    @@services_config_list["default"] ||= {}
    @@services_config_list["default"]["services"] ||= {}
  end
  return @@services_config_list
end

.instantiate_service!(service, request) ⇒ Object

pass in string unique key OR a service definition hash, and a current UmlautRequest. get back instantiated Service object.



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# File 'app/models/service_store.rb', line 47

def self.instantiate_service!(service, request)
  definition = service.kind_of?(Hash) ? service : service_definition_for(service.to_s)
      
  if definition.nil?
    raise "Service '#{service}'' does not exist in umlaut-services.yml"
  end
  
  className = definition["type"] || definition["service_id"]
  classConst = Kernel.const_get(className)
  service = classConst.new(definition)
  service.request = request

  return service    
end

.service_definition_for(service_id) ⇒ Object 



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# File 'app/models/service_store.rb', line 40

def self.service_definition_for(service_id)
  return service_definitions[service_id]
end

.service_definitions ⇒ Object

Returns hash keyed by unique service name, value service definition hash.



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# File 'app/models/service_store.rb', line 26

def self.service_definitions
  unless defined? @@service_definitions
    @@service_definitions = {}
    config.each_pair do |group_name, group|
      @@service_definitions.merge!(  group["services"]  ) if group["services"]
    end
    # set service_id key in each based on hash key
    @@service_definitions.each_pair do |key, hash|
      hash["service_id"] =  key
    end
  end
  return @@service_definitions
end