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// 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 (
"time"
"github.com/go-kit/kit/log"
"github.com/go-kit/kit/log/level"
"github.com/prometheus/client_golang/prometheus"
)
type timeCollector struct {
desc *prometheus.Desc
logger log.Logger
}
func init() {
registerCollector("time", defaultEnabled, NewTimeCollector)
}
// NewTimeCollector returns a new Collector exposing the current system time in
// seconds since epoch.
func NewTimeCollector(logger log.Logger) (Collector, error) {
return &timeCollector{
desc: prometheus.NewDesc(
namespace+"_time_seconds",
"System time in seconds since epoch (1970).",
nil, nil,
),
logger: logger,
}, nil
}
func (c *timeCollector) Update(ch chan<- prometheus.Metric) error {
now := float64(time.Now().UnixNano()) / 1e9
level.Debug(c.logger).Log("msg", "Return time", "now", now)
ch <- prometheus.MustNewConstMetric(c.desc, prometheus.GaugeValue, now)
return nil
}
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