Contents

require 'sanford/service_handler'

module Sanford

  class HostData

    # When trying to run a server for a host, we need to build up the host's
    # data to increase the performance of the server. This is done by
    # constantizing a host's handlers and merging a host's configuration with
    # optional overrides.

    # NOTE: The `name` attribute shouldn't be removed, it is used to identify
    # a `HostData`, particularly in error handlers

    attr_reader :name, :logger, :verbose, :keep_alive, :runner, :error_procs

    def initialize(service_host, options = nil)
      service_host.configuration.init_proc.call

      overrides = self.remove_nil_values(options || {})
      configuration = service_host.configuration.to_hash.merge(overrides)

      @name        = configuration[:name]
      @logger      = configuration[:logger]
      @verbose     = configuration[:verbose_logging]
      @keep_alive  = configuration[:receives_keep_alive]
      @runner      = configuration[:runner]
      @error_procs = configuration[:error_procs]

      @handlers = service_host.services.inject({}) do |h, (name, handler_class_name)|
        h.merge({ name => self.constantize(handler_class_name) })
      end
    end

    def run(handler_class, request)
      self.runner.new(handler_class, request, self.logger).run
    end

    def handler_class_for(service)
      @handlers[service] || raise(Sanford::NotFoundError)
    end

    protected

    def constantize(handler_class_name)
      Sanford::ServiceHandler.constantize(handler_class_name) ||
        raise(Sanford::NoHandlerClassError.new(handler_class_name))
    end

    def remove_nil_values(hash)
      hash.inject({}){|h, (k, v)| !v.nil? ? h.merge({ k => v }) : h }
    end

  end

  NotFoundError = Class.new(RuntimeError)

  class NoHandlerClassError < RuntimeError
    def initialize(handler_class_name)
      super "Sanford couldn't find the service handler '#{handler_class_name}'. " \
        "It doesn't exist or hasn't been required in yet."
    end
  end

end

Version data entries

1 entries across 1 versions & 1 rubygems

Version	Path
sanford-0.8.0	lib/sanford/host_data.rb