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exporter.go
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exporter.go
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package awsclient
import (
"sync"
"github.com/aws/aws-sdk-go/aws/session"
"github.com/prometheus/client_golang/prometheus"
)
var AwsExporterMetrics *ExporterMetrics
// ExporterMetrics defines an instance of the exporter metrics
type ExporterMetrics struct {
sess *session.Session
APIRequestsCount float64
APIErrorsCount float64
APIRequests *prometheus.Desc
APIErrors *prometheus.Desc
mutex *sync.Mutex
}
// NewExporterMetrics creates a new exporter metrics instance
func NewExporterMetrics(namespace string) *ExporterMetrics {
return &ExporterMetrics{
APIRequests: prometheus.NewDesc(
prometheus.BuildFQName(namespace, "", "apirequests"),
"API requests made by the exporter.",
[]string{},
nil,
),
APIErrors: prometheus.NewDesc(
prometheus.BuildFQName(namespace, "", "apierrors"),
"API errors encountered by the exporter.",
[]string{},
nil,
),
mutex: &sync.Mutex{},
}
}
// Describe is used by the Prometheus client to return a description of the metrics
func (e *ExporterMetrics) Describe(ch chan<- *prometheus.Desc) {
ch <- e.APIRequests
ch <- e.APIErrors
}
// Collect is used by the Prometheus client to collect and return the metrics values
func (e *ExporterMetrics) Collect(ch chan<- prometheus.Metric) {
ch <- prometheus.MustNewConstMetric(e.APIRequests, prometheus.CounterValue, e.APIRequestsCount)
ch <- prometheus.MustNewConstMetric(e.APIErrors, prometheus.CounterValue, e.APIErrorsCount)
}
// IncrementRequests increments the API requests counter
func (e *ExporterMetrics) IncrementRequests() {
e.mutex.Lock()
e.APIRequestsCount++
e.mutex.Unlock()
}
// IncrementErrors increments the API requests error counter
func (e *ExporterMetrics) IncrementErrors() {
e.mutex.Lock()
e.APIErrorsCount++
e.mutex.Unlock()
}