Contents

class Nagios::Runner

  def initialize(params, &callback)
    @params = params.with_indifferent_access
    @callback = callback
    @method = @params.delete(:method).to_s
    @method = @method.gsub(/[^:_\.\-a-z0-9]/i, '')
    @klass_name = "Nagios::#{@method.camelize}"

    raise "method should be" if @method.blank?

    Nagios.load_initializers
    load_class

    run
  rescue Exception, Timeout::Error => ex
    Nagios.logger.info "T= #{params.inspect} #{ex.message} (#{ex.backtrace.inspect})"
    callback[ Nagios::Check.default_error(ex.message) ]
  end

  # synchrony check, for manual call
  def self.check(params = {})
    result = nil

    self.new(params) do |res|
      result = res
    end

    result
  end

protected

  def constantize
    c = @klass_name.constantize
    if c.ancestors.detect { |an| an == Nagios::Check || an == Nagios::CheckEM }
      c
    end
  rescue LoadError, NameError
    nil
  end

  def load_class
    klass = constantize

    unless klass
      Dir[Nagios.root + "/**/#{@method}.rb"].each do |file|
        require File.expand_path(file)
      end

      klass = constantize
    end

    raise "unknown klass #{@klass_name}" unless klass

    @klass = klass
    @ancestor = klass.ancestors.detect { |an| an == Nagios::Check || an == Nagios::CheckEM }
  end

  def run
    if @ancestor == Nagios::Check
      script = @klass.new(@params, &@callback)
      script.run
    elsif @ancestor == Nagios::CheckEM
      raise "cant run EM check in Sync Runner"
    else
      raise "unknown klass #{@klass.inspect}"
    end
  end

end

Version data entries

3 entries across 3 versions & 1 rubygems

Version	Path
nagios_helper-0.2.2	lib/nagios/runner.rb
nagios_helper-0.2.1	lib/nagios/runner.rb
nagios_helper-0.2	lib/nagios/runner.rb