/
cluster.go
142 lines (111 loc) · 2.79 KB
/
cluster.go
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
package protocol
import (
"fmt"
"sort"
"strconv"
"strings"
"text/tabwriter"
)
type Cluster struct {
ClusterID string
Controller int
Brokers map[int]Broker
Topics map[string]Topic
}
func (c Cluster) BrokerIDs() []int {
brokerIDs := make([]int, 0, len(c.Brokers))
for id := range c.Brokers {
brokerIDs = append(brokerIDs, id)
}
sort.Ints(brokerIDs)
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[int]struct{}, len(c.Brokers))
brokerIDs := make([]int, 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 []int, leader int) string {
if len(brokerIDs) == 0 {
return ""
}
if len(brokerIDs) == 1 {
return strconv.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] = strconv.Itoa(id)
}
return strings.Join(brokerNames, ",")
}
var (
_ fmt.Formatter = Cluster{}
)