Import Prometheus time.go

collector/time.go

@@ -0,0 +1,69 @@
+// Copyright 2015 The Prometheus Authors
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// +build !notime
+
+package collector
+
+import (
+	"fmt"
+	"time"
+
+	"github.com/go-kit/log"
+	"github.com/go-kit/log/level"
+	"github.com/prometheus/client_golang/prometheus"
+)
+
+type timeCollector struct {
+	nowDesc  *prometheus.Desc
+	zoneDesc *prometheus.Desc
+	logger   log.Logger
+}
+
+func init() {
+	registerCollector("time", defaultEnabled, NewTimeCollector)
+	fmt.Println("init...")
+
+}
+
+// NewTimeCollector returns a new Collector exposing the current system time in
+// seconds since epoch.
+func NewTimeCollector(logger log.Logger) (Collector, error) {
+	const subsystem = "time"
+	return &timeCollector{
+		nowDesc: prometheus.NewDesc(
+			prometheus.BuildFQName(namespace, subsystem, "seconds"),
+			"System time in seconds since epoch (1970).",
+			nil, nil,
+		),
+		zoneDesc: prometheus.NewDesc(
+			prometheus.BuildFQName(namespace, subsystem, "zone_offset_seconds"),
+			"System time zone offset in seconds.",
+			[]string{"time_zone"}, nil,
+		),
+		logger: logger,
+	}, nil
+}
+
+func (c *timeCollector) Update(ch chan<- prometheus.Metric) error {
+	now := time.Now()
+	nowSec := float64(now.UnixNano()) / 1e9
+	zone, zoneOffset := now.Zone()
+
+	level.Debug(c.logger).Log("msg", "Return time", "now", nowSec)
+	ch <- prometheus.MustNewConstMetric(c.nowDesc, prometheus.GaugeValue, nowSec)
+	level.Debug(c.logger).Log("msg", "Zone offset", "offset", zoneOffset, "time_zone", zone)
+	ch <- prometheus.MustNewConstMetric(c.zoneDesc, prometheus.GaugeValue, float64(zoneOffset), zone)
+
+	return nil
+}