Class: Common::Client::Configuration::Base

Inherits:
Object
  • Object
show all
Includes:
Singleton
Defined in:
lib/common/client/configuration/base.rb

Overview

Base class for HTTP service configurations. This class should not be used directly. Use REST or SOAP instead.

Direct Known Subclasses

REST, SOAP

Class Attributes collapse

Class Attributes collapse

Instance Attribute Details

#base_request_headers ⇒ Object

headers to include in all requests



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# File 'lib/common/client/configuration/base.rb', line 39

class_attribute :base_request_headers

#open_timeout ⇒ Object

rubocop:disable ThreadSafety/ClassAndModuleAttributes These attributes are inherited by subclasses so that they can change their own value without impacting the parent class timeout for opening the connection



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# File 'lib/common/client/configuration/base.rb', line 19

class_attribute :open_timeout

#read_timeout ⇒ Object

timeout for reading a response



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# File 'lib/common/client/configuration/base.rb', line 24

class_attribute :read_timeout

#request_types ⇒ Object

allowed requests types e.g. ‘%i[get put post delete].freeze`



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# File 'lib/common/client/configuration/base.rb', line 29

class_attribute :request_types

#user_agent ⇒ Object

value for the User-Agent header



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# File 'lib/common/client/configuration/base.rb', line 34

class_attribute :user_agent

Instance Method Details

#base_path ⇒ Object

The base path to use for all requests. Implemented by sub classes.

Raises:

  • (NotImplementedError) 


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# File 'lib/common/client/configuration/base.rb', line 55

def base_path
  raise NotImplementedError, "Subclass #{self.class.name} of Configuration must implement base_path"
end

#breakers_error_threshold ⇒ Integer

The percentage of errors over which an outage will be reported as part of breakers gem

Returns:

  • (Integer) —

    corresponding to percentage



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# File 'lib/common/client/configuration/base.rb', line 137

def breakers_error_threshold
  50
end

#breakers_exception_handler ⇒ Object 



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# File 'lib/common/client/configuration/base.rb', line 110

def breakers_exception_handler
  proc do |exception|
    case exception
    when Common::Exceptions::BackendServiceException
      (500..599).cover?(exception.response_values[:status])
    when Common::Client::Errors::HTTPError
      (500..599).cover?(exception.status)
    when Faraday::ServerError
      (500..599).cover?(exception.response&.[](:status))
    else
      false
    end
  end
end

#breakers_matcher ⇒ Object 



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# File 'lib/common/client/configuration/base.rb', line 102

def breakers_matcher
  base_uri = URI.parse(base_path)
  proc do |request_env|
    request_env.url.host == base_uri.host && request_env.url.port == base_uri.port &&
      request_env.url.path =~ /^#{base_uri.path}/
  end
end

#breakers_service ⇒ Object

Default request options, sets the read and open timeouts.

Returns:

  • Hash default request options.



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# File 'lib/common/client/configuration/base.rb', line 96

def breakers_service
  return @service if defined?(@service)

  @service = create_new_breakers_service(breakers_matcher, breakers_exception_handler)
end

#create_new_breakers_service(matcher, exception_handler) ⇒ Object 



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# File 'lib/common/client/configuration/base.rb', line 125

def create_new_breakers_service(matcher, exception_handler)
  Breakers::Service.new(
    name: service_name,
    request_matcher: matcher,
    error_threshold: breakers_error_threshold,
    exception_handler:
  )
end

#current_module ⇒ Object (private)

deconstantize fetches “AA::BB::” from AA::BB::ClassName, and constantize returns that as a constant.



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# File 'lib/common/client/configuration/base.rb', line 144

def current_module
  self.class.name.deconstantize.constantize
end

#request_options ⇒ Object

Default request options, sets the read and open timeouts.

Returns:

  • Hash default request options.



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# File 'lib/common/client/configuration/base.rb', line 84

def request_options
  {
    open_timeout:,
    timeout: read_timeout
  }
end

#service_exception ⇒ Object

Creates a custom service exception with the same namespace as the implementing class.

Returns:

  • Common::Exceptions::BackendServiceException execption with the class’ namespace



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# File 'lib/common/client/configuration/base.rb', line 71

def service_exception
  if current_module.const_defined?('ServiceException')
    current_module.const_get('ServiceException')
  else
    current_module.const_set('ServiceException', Class.new(Common::Exceptions::BackendServiceException))
  end
end

#service_name ⇒ Object

The service name that shows up in breakers metrics and logs. Implemented by sub classes.

Raises:

  • (NotImplementedError) 


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# File 'lib/common/client/configuration/base.rb', line 62

def service_name
  raise NotImplementedError, "Subclass #{self.class.name} of Configuration must implement service_name"
end