class Fluent::Plugin::Prometheus::Gauge
Public Class Methods
new(element, registry, labels)
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Calls superclass method
Fluent::Plugin::Prometheus::Metric::new
# File lib/fluent/plugin/prometheus.rb, line 198 def initialize(element, registry, labels) super if @key.nil? raise ConfigError, "gauge metric requires 'key' option" end begin @gauge = registry.gauge(element['name'].to_sym, docstring: element['desc'], labels: @base_labels.keys) rescue ::Prometheus::Client::Registry::AlreadyRegisteredError @gauge = Fluent::Plugin::Prometheus::Metric.get(registry, element['name'].to_sym, :gauge, element['desc']) end end
Public Instance Methods
instrument(record, expander)
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# File lib/fluent/plugin/prometheus.rb, line 211 def instrument(record, expander) if @key.is_a?(String) value = record[@key] else value = @key.call(record) end if value @gauge.set(value, labels: labels(record, expander)) end end