sql

package

v1.1.0 Latest Latest Go to latest Published: Mar 8, 2021 License: Apache-2.0 Imports: 5 Imported by: 2

Details

Package sql implements the prometheus.Collector interface for bigquery.

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type Collector struct {
	// contains filtered or unexported fields
}

Collector manages a prometheus.Collector for queries performed by a QueryRunner.

func NewCollector(runner QueryRunner, valType prometheus.ValueType, metricName, query string) *Collector

NewCollector creates a new BigQuery Collector instance.

func (col *Collector) Collect(ch chan<- prometheus.Metric)

Collect satisfies the prometheus.Collector interface. Collect reports values from cached metrics.

func (col *Collector) Describe(ch chan<- *prometheus.Desc)

Describe satisfies the prometheus.Collector interface. Describe is called immediately after registering the collector.

func (col *Collector) String() string

String satisfies the Stringer interface. String returns the metric name.

func (col *Collector) Update() error

Update runs the collector query and atomically updates the cached metrics. Update is called automaticlly after the collector is registered.

type Metric struct {
	LabelKeys   []string
	LabelValues []string
	Values      map[string]float64
}

Metric holds raw data from query results needed to create a prometheus.Metric.

func NewMetric(labelKeys []string, labelValues []string, values map[string]float64) Metric

NewMetric creates a Metric with given values.

type QueryRunner interface {
	Query(q string) ([]Metric, error)
}

QueryRunner defines the interface used to run a query and return an array of metrics.