helpers.rb

module Memcached
  module Helpers
    def service_user
      value_for_platform_family(
        %w(suse fedora rhel amazon) => 'memcached',
        'debian' => 'memcache',
        'default' => 'nobody'
      )
    end

    def service_group
      value_for_platform_family(
        %w(suse fedora rhel amazon) => 'memcached',
        'debian' => 'memcache',
        'default' => 'nogroup'
      )
    end

    def binary_path
      new_resource.binary_path || value_for_platform_family(
        'suse' => '/usr/sbin/memcached',
        'default' => '/usr/bin/memcached'
      )
    end

    # if the instance name is memcached don't spit out memcached_memcached
    def memcached_instance_name
      new_resource.instance_name == 'memcached' ? 'memcached' : "memcached_#{new_resource.instance_name}"
    end

    def disable_default_memcached_instance
      return unless new_resource.disable_default_instance

      service 'disable default memcached' do
        service_name 'memcached'
        action [:stop, :disable]
        not_if { new_resource.instance_name == 'memcached' }
      end
    end

    def remove_default_memcached_configs
      return unless new_resource.remove_default_config

      %w(/etc/memcached.conf /etc/sysconfig/memcached /etc/default/memcached).each do |f|
        file f do
          action :delete
        end
      end
    end

    def cli_options
      options = "-m #{new_resource.memory} -u #{new_resource.user} -c #{new_resource.maxconn} \
-I #{new_resource.max_object_size}"
      # If sockets are used, ports are disabled by default
      if new_resource.socket.empty?
        options << " -U #{new_resource.udp_port} -p #{new_resource.port} -l #{new_resource.listen}"
      end

      options << " -s #{new_resource.socket}" unless new_resource.socket.empty?
      options << " -a #{new_resource.socket_mode}" unless new_resource.socket_mode.empty?
      options << " -o #{new_resource.experimental_options.join(',')}" unless new_resource.experimental_options.empty?

      log_arg = ''
      case new_resource.log_level
      when 'info'
        log_arg = 'v'
      when 'debug'
        log_arg = 'vv'
      when 'trace'
        log_arg = 'vvv'
      end
      options << " -#{log_arg}"

      options << " -t #{new_resource.threads}" if new_resource.threads
      options << " #{new_resource.extra_cli_options.join(' ')}" unless new_resource.extra_cli_options.empty?
      options
    end

    def log_file_name
      File.join(node['memcached']['logfilepath'], "#{memcached_instance_name}.log")
    end

    def create_log_file
      file log_file_name do
        user service_user
        group service_group
        mode '0644'
      end
    end
  end
end
Chef::DSL::Recipe.include Memcached::Helpers
Chef::Resource.include Memcached::Helpers