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/
generate.go
63 lines (56 loc) · 1.77 KB
/
generate.go
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package main
import (
"fmt"
"github.com/grafana/metrictank/clock"
"github.com/grafana/metrictank/schema"
log "github.com/sirupsen/logrus"
"sync/atomic"
)
func produceTestMetrics(metrics []*schema.MetricData) {
for tick := range clock.AlignedTickLossless(testMetricsInterval) {
for _, metric := range metrics {
metric.Time = tick.Unix()
metric.Value = float64(tick.Unix())
}
publisher.Flush(metrics)
atomic.StoreInt64(&lastPublish, tick.Unix())
log.Infof("flushed metrics for ts %d", tick.Unix())
}
}
//generateMetrics generates a MetricData that hashes to each of numPartitions partitions
func generateMetrics(numPartitions int32) []*schema.MetricData {
var metrics []*schema.MetricData
for i := int32(0); i < numPartitions; i++ {
metrics = append(metrics, generateMetric(i))
}
return metrics
}
//generateMetric generates a single MetricData that hashes to the given partition
func generateMetric(desiredPartition int32) *schema.MetricData {
metric := schema.MetricData{
OrgId: orgId,
Unit: "partyparrots",
Mtype: "gauge",
Interval: int(testMetricsInterval.Seconds()),
}
for i := 1; true; i++ {
metric.Name = fmt.Sprintf("parrot.testdata.%d.identity.%s", desiredPartition, generatePartitionSuffix(i))
id, err := metric.PartitionID(partitionMethod, partitionCount)
if err != nil {
log.Fatal(err)
}
if id == desiredPartition {
log.Infof("metric for partition %d: %s", desiredPartition, metric.Name)
return &metric
}
}
return nil
}
var alphabet = []rune("abcdefghijklmnopqrstuvwxyz")
//generatePartitionSuffix deterministically generates a suffix for partition by brute force
func generatePartitionSuffix(i int) string {
if i > 25 {
return generatePartitionSuffix((i/26)-1) + string(alphabet[i%26])
}
return string(alphabet[i%26])
}