Class: PrometheusExporter::Server::Collector

Inherits:
CollectorBase show all
Defined in:
lib/prometheus_exporter/server/collector.rb

Constant Summary collapse

MAX_PROCESS_METRIC_AGE = 
60
PROCESS_GAUGES = 
{
  heap_free_slots: "Free ruby heap slots",
  heap_live_slots: "Used ruby heap slots",
  v8_heap_size: "Total JavaScript V8 heap size (bytes)",
  v8_used_heap_size: "Total used JavaScript V8 heap size (bytes)",
  v8_physical_size: "Physical size consumed by V8 heaps",
  v8_heap_count: "Number of V8 contexts running",
  rss: "Total RSS used by process",
}
PROCESS_COUNTERS = 
{
  major_gc_count: "Major GC operations by process",
  minor_gc_count: "Minor GC operations by process",
  total_allocated_objects: "Total number of allocateds objects by process",
}

Instance Method Summary collapse

Constructor Details

#initialize ⇒ Collector

Returns a new instance of Collector.



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# File 'lib/prometheus_exporter/server/collector.rb', line 23

def initialize
  @process_metrics = []
  @metrics = {}
  @buffer = []
  @mutex = Mutex.new
end

Instance Method Details

#process(str) ⇒ Object 



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# File 'lib/prometheus_exporter/server/collector.rb', line 30

def process(str)
  obj = JSON.parse(str)
  @mutex.synchronize do
    if obj["type"] == "web"
      observe_web(obj)
    elsif obj["type"] == "process"
      observe_process(obj)
    else
      metric = @metrics[obj["name"]]
      if !metric
        metric = register_metric_unsafe(obj)
      end
      metric.observe(obj["value"], obj["keys"])
    end
  end
end

#prometheus_metrics_text ⇒ Object 



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# File 'lib/prometheus_exporter/server/collector.rb', line 47

def prometheus_metrics_text
  @mutex.synchronize do
    val = @metrics.values.map(&:to_prometheus_text).join("\n")

    metrics = {}

    if @process_metrics.length > 0
      val << "\n"

      @process_metrics.map do |m|
        metric_key = { pid: m["pid"], type: m["process_type"] }

        PROCESS_GAUGES.map do |k, help|
          k = k.to_s
          if v = m[k]
            g = metrics[k] ||= PrometheusExporter::Metric::Gauge.new(k, help)
            g.observe(v, metric_key)
          end
        end

        PROCESS_COUNTERS.map do |k, help|
          k = k.to_s
          if v = m[k]
            c = metrics[k] ||= PrometheusExporter::Metric::Counter.new(k, help)
            c.observe(v, metric_key)
          end
        end

      end

      val << metrics.values.map(&:to_prometheus_text).join("\n")
    end

    val
  end
end