class Pwwka::ErrorHandlers::Chain

Given a chain of error handlers, calls them until either one returns false/aborts or we exhaust the chain of handlers

Public Class Methods

new(default_handler_chain=[]) click to toggle source
# File lib/pwwka/error_handlers/chain.rb, line 7
def initialize(default_handler_chain=[])
  @error_handlers = default_handler_chain
end

Public Instance Methods

handle_error(message_handler_klass,receiver,queue_name,payload,delivery_info,exception) click to toggle source
# File lib/pwwka/error_handlers/chain.rb, line 10
def handle_error(message_handler_klass,receiver,queue_name,payload,delivery_info,exception)
  logf "Error Processing Message in %{message_handler_klass} due to %{exception} from payload '%{payload}'", at: :error, message_handler_klass: message_handler_klass, exception: exception.message, payload: payload
  if message_handler_klass.respond_to?(:error_handler)
    @error_handlers.unshift(message_handler_klass.send(:error_handler))
  end
  @error_handlers.reduce(true) { |keep_going,error_handler|
    begin
      logf "%{error_handler_class} is being evaluated as part of pwwka's error-handling chain", error_handler_class: error_handler
      if keep_going
        keep_going = error_handler.new.handle_error(receiver,queue_name,payload,delivery_info,exception)
        if keep_going
          logf "%{error_handler_class} has asked to continue pwwka's error-handling chain", error_handler_class: error_handler
        else
          logf "%{error_handler_class} has halted pwwka's error-handling chain", error_handler_class: error_handler
        end
      else
        logf "Skipping %{error_handler_class} as we were asked to abort pwwka's error-handling chain", error_handler_class: error_handler
      end
      keep_going
    rescue StandardError => exception
      logf "'%{error_handler_class}' aborting due to unhandled exception '%{exception}'", at: :fatal, error_handler_class: error_handler, exception: exception
      false
    end
  }
end