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|
package protocol
import (
"fmt"
"sort"
"strings"
"text/tabwriter"
)
type Cluster struct {
ClusterID string
Controller int32
Brokers map[int32]Broker
Topics map[string]Topic
}
func (c Cluster) BrokerIDs() []int32 {
brokerIDs := make([]int32, 0, len(c.Brokers))
for id := range c.Brokers {
brokerIDs = append(brokerIDs, id)
}
sort.Slice(brokerIDs, func(i, j int) bool {
return brokerIDs[i] < brokerIDs[j]
})
return brokerIDs
}
func (c Cluster) TopicNames() []string {
topicNames := make([]string, 0, len(c.Topics))
for name := range c.Topics {
topicNames = append(topicNames, name)
}
sort.Strings(topicNames)
return topicNames
}
func (c Cluster) IsZero() bool {
return c.ClusterID == "" && c.Controller == 0 && len(c.Brokers) == 0 && len(c.Topics) == 0
}
func (c Cluster) Format(w fmt.State, _ rune) {
tw := new(tabwriter.Writer)
fmt.Fprintf(w, "CLUSTER: %q\n\n", c.ClusterID)
tw.Init(w, 0, 8, 2, ' ', 0)
fmt.Fprint(tw, " BROKER\tHOST\tPORT\tRACK\tCONTROLLER\n")
for _, id := range c.BrokerIDs() {
broker := c.Brokers[id]
fmt.Fprintf(tw, " %d\t%s\t%d\t%s\t%t\n", broker.ID, broker.Host, broker.Port, broker.Rack, broker.ID == c.Controller)
}
tw.Flush()
fmt.Fprintln(w)
tw.Init(w, 0, 8, 2, ' ', 0)
fmt.Fprint(tw, " TOPIC\tPARTITIONS\tBROKERS\n")
topicNames := c.TopicNames()
brokers := make(map[int32]struct{}, len(c.Brokers))
brokerIDs := make([]int32, 0, len(c.Brokers))
for _, name := range topicNames {
topic := c.Topics[name]
for _, p := range topic.Partitions {
for _, id := range p.Replicas {
brokers[id] = struct{}{}
}
}
for id := range brokers {
brokerIDs = append(brokerIDs, id)
}
fmt.Fprintf(tw, " %s\t%d\t%s\n", topic.Name, len(topic.Partitions), formatBrokerIDs(brokerIDs, -1))
for id := range brokers {
delete(brokers, id)
}
brokerIDs = brokerIDs[:0]
}
tw.Flush()
fmt.Fprintln(w)
if w.Flag('+') {
for _, name := range topicNames {
fmt.Fprintf(w, " TOPIC: %q\n\n", name)
tw.Init(w, 0, 8, 2, ' ', 0)
fmt.Fprint(tw, " PARTITION\tREPLICAS\tISR\tOFFLINE\n")
for _, p := range c.Topics[name].Partitions {
fmt.Fprintf(tw, " %d\t%s\t%s\t%s\n", p.ID,
formatBrokerIDs(p.Replicas, -1),
formatBrokerIDs(p.ISR, p.Leader),
formatBrokerIDs(p.Offline, -1),
)
}
tw.Flush()
fmt.Fprintln(w)
}
}
}
func formatBrokerIDs(brokerIDs []int32, leader int32) string {
if len(brokerIDs) == 0 {
return ""
}
if len(brokerIDs) == 1 {
return itoa(brokerIDs[0])
}
sort.Slice(brokerIDs, func(i, j int) bool {
id1 := brokerIDs[i]
id2 := brokerIDs[j]
if id1 == leader {
return true
}
if id2 == leader {
return false
}
return id1 < id2
})
brokerNames := make([]string, len(brokerIDs))
for i, id := range brokerIDs {
brokerNames[i] = itoa(id)
}
return strings.Join(brokerNames, ",")
}
var (
_ fmt.Formatter = Cluster{}
)
|
