Module: Vanity::Metric::Remote

Defined in:
lib/vanity/metric/remote.rb

Overview

To update a remote metric, make a POST request to the metric URL with the content type “application/x-www-form-urlencoded” and the following fields:

  • The metric identifier,

  • The timestamp must be RFC 2616 formatted (in Ruby just call httpdate on the Time object),

  • The identity (optional),

  • Pass consecutive values using the field values[], or

  • Set values by their index using values[0], values[1], etc or

  • Set values by series name using values[foo], values[bar], etc.

Since:

  • 1.1.0

Instance Method Summary collapse

Instance Method Details

#track!(args = nil) ⇒ Object

Since:

  • 1.1.0



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# File 'lib/vanity/metric/remote.rb', line 28

def track!(args = nil)
  return unless @playground.collecting?

  timestamp, identity, values = track_args(args)
  params = ["metric=#{CGI.escape @id.to_s}", "timestamp=#{CGI.escape timestamp.httpdate}"]
  params << "identity=#{CGI.escape identity.to_s}" if identity
  params.concat values.map { |v| "values[]=#{v.to_i}" }
  params << @remote_url.query if @remote_url.query
  @mutex.synchronize do
    @http ||= Net::HTTP.start(@remote_url.host, @remote_url.port)
    @http.request Net::HTTP::Post.new(@remote_url.path, "Content-Type" => "application/x-www-form-urlencoded"), params.join("&")
  end
rescue Timeout::Error, StandardError # rubocop:todo Lint/ShadowedException
  @playground.logger.error "Error sending data for metric #{name}: #{$!}"
  @http = nil
ensure
  call_hooks timestamp, identity, values
end