/
helpers.go
90 lines (75 loc) · 1.84 KB
/
helpers.go
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package main
import (
"bytes"
"sort"
"github.com/DataDog/kafka-kit/kafkametrics"
)
// bmapBundle holds several maps
// used as sets. Reduces return params
// for mapsFromReassigments.
type bmapBundle struct {
src map[int]struct{}
dst map[int]struct{}
all map[int]struct{}
throttled map[string]map[string][]string
}
// lists returns a []int of broker IDs for the
// src, dst and all bmapBundle maps.
func (bm bmapBundle) lists() ([]int, []int, []int) {
srcBrokers := []int{}
dstBrokers := []int{}
for n, m := range []map[int]struct{}{bm.src, bm.dst} {
for b := range m {
if n == 0 {
srcBrokers = append(srcBrokers, b)
} else {
dstBrokers = append(dstBrokers, b)
}
}
}
allBrokers := []int{}
for b := range bm.all {
allBrokers = append(allBrokers, b)
}
// Sort.
sort.Ints(srcBrokers)
sort.Ints(dstBrokers)
sort.Ints(allBrokers)
return srcBrokers, dstBrokers, allBrokers
}
// incompleteBrokerMetrics takes a []int of all broker IDs involved in
// the current replication event and a kafkametrics.BrokerMetrics. If
// any brokers in the ID list are not found in the BrokerMetrics, our
// metrics are considered incomplete.
func incompleteBrokerMetrics(ids []int, metrics kafkametrics.BrokerMetrics) bool {
for _, id := range ids {
if _, exists := metrics[id]; !exists {
return true
}
}
return false
}
// mergeMaps takes two maps and merges them.
func mergeMaps(a map[int]struct{}, b map[int]struct{}) map[int]struct{} {
m := map[int]struct{}{}
// Merge from each.
for k := range a {
m[k] = struct{}{}
}
for k := range b {
m[k] = struct{}{}
}
return m
}
// sliceToString takes []string and
// returns a comma delimited string.
func sliceToString(l []string) string {
var b bytes.Buffer
for n, i := range l {
b.WriteString(i)
if n < len(l)-1 {
b.WriteString(",")
}
}
return b.String()
}