Source file src/github.com/docker/go-metrics/counter.go

Documentation: github.com/docker/go-metrics

     1  package metrics
     2  
     3  import "github.com/prometheus/client_golang/prometheus"
     4  
     5  // Counter is a metrics that can only increment its current count
     6  type Counter interface {
     7  	// Inc adds Sum(vs) to the counter. Sum(vs) must be positive.
     8  	//
     9  	// If len(vs) == 0, increments the counter by 1.
    10  	Inc(vs ...float64)
    11  }
    12  
    13  // LabeledCounter is counter that must have labels populated before use.
    14  type LabeledCounter interface {
    15  	WithValues(vs ...string) Counter
    16  }
    17  
    18  type labeledCounter struct {
    19  	pc *prometheus.CounterVec
    20  }
    21  
    22  func (lc *labeledCounter) WithValues(vs ...string) Counter {
    23  	return &counter{pc: lc.pc.WithLabelValues(vs...)}
    24  }
    25  
    26  func (lc *labeledCounter) Describe(ch chan<- *prometheus.Desc) {
    27  	lc.pc.Describe(ch)
    28  }
    29  
    30  func (lc *labeledCounter) Collect(ch chan<- prometheus.Metric) {
    31  	lc.pc.Collect(ch)
    32  }
    33  
    34  type counter struct {
    35  	pc prometheus.Counter
    36  }
    37  
    38  func (c *counter) Inc(vs ...float64) {
    39  	if len(vs) == 0 {
    40  		c.pc.Inc()
    41  	}
    42  
    43  	c.pc.Add(sumFloat64(vs...))
    44  }
    45  
    46  func (c *counter) Describe(ch chan<- *prometheus.Desc) {
    47  	c.pc.Describe(ch)
    48  }
    49  
    50  func (c *counter) Collect(ch chan<- prometheus.Metric) {
    51  	c.pc.Collect(ch)
    52  }
    53  

View as plain text