-
Notifications
You must be signed in to change notification settings - Fork 0
/
main.go
144 lines (125 loc) · 2.72 KB
/
main.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
143
144
package main
import (
"bytes"
"flag"
"fmt"
"math/rand"
"os"
"runtime/debug"
"sync/atomic"
"syscall"
"time"
"github.com/exonlabs/go-utils/pkg/xlog"
"github.com/exonlabs/go-utils/pkg/xputil"
)
var (
workers atomic.Int32
wrkIndx atomic.Int32
)
type Worker struct {
*xputil.BaseRoutine
close bool
}
func NewWorker() *Worker {
wk := &Worker{}
wk.BaseRoutine = xputil.NewBaseRoutine(wk)
return wk
}
func (wk *Worker) Initialize() error {
wk.Log.Info("initialized")
return nil
}
func (wk *Worker) Execute() error {
if rand.Intn(10) >= 8 {
wk.Log.Info("closing myself")
wk.close = true
wk.Stop()
return nil
}
wk.Log.Info("running")
wk.Sleep(2)
return nil
}
func (wk *Worker) Terminate() error {
if !wk.close && rand.Intn(10) >= 5 {
wk.Log.Info("i will not exit")
for {
time.Sleep(time.Second * 10)
break
}
}
wk.Log.Info("terminated")
return nil
}
func main() {
logger := xlog.NewStdoutLogger("main")
defer func() {
if r := recover(); r != nil {
stack := debug.Stack()
indx := bytes.Index(stack, []byte("panic({"))
logger.Panic("%s", r)
logger.Trace1("\n----------\n%s----------", stack[indx:])
os.Exit(1)
} else {
logger.Info("exit")
os.Exit(0)
}
}()
debug := flag.Int("x", 0, "set debug modes, (default: 0)")
flag.Parse()
switch {
case *debug >= 5:
logger.Level = xlog.TRACE4
case *debug >= 4:
logger.Level = xlog.TRACE3
case *debug >= 3:
logger.Level = xlog.TRACE2
case *debug >= 2:
logger.Level = xlog.TRACE1
case *debug >= 1:
logger.Level = xlog.DEBUG
}
logger.Info("**** starting ****")
workers.Store(3)
wrkIndx.Store(1)
rm := xputil.NewRtManager(logger)
rm.ProcTitle = "WrkManager"
for i := int32(1); i <= workers.Load(); i++ {
wname := fmt.Sprintf("wrk%d", i)
if err := rm.AddRoutine(wname, NewWorker(), true); err != nil {
logger.Error(err.Error())
return
}
}
rm.SetSignal(syscall.SIGUSR1, func() {
logger.Info("adding worker")
if (workers.Load() - wrkIndx.Load() + 1) >= 10 {
logger.Info("max concurrent workers")
return
}
wname := fmt.Sprintf("wrk%d", workers.Load()+1)
logger.Info("adding new worker: %s", wname)
if err := rm.AddRoutine(wname, NewWorker(), true); err != nil {
logger.Error(
"failed adding worker: %s - %s", wname, err.Error())
return
}
workers.Add(1)
})
rm.SetSignal(syscall.SIGUSR2, func() {
logger.Info("deleting worker")
if wrkIndx.Load() <= workers.Load() {
wname := fmt.Sprintf("wrk%d", wrkIndx.Load())
logger.Info("deleting worker: %s", wname)
if err := rm.DelRoutine(wname); err != nil {
logger.Error(
"failed deleting worker: %s - %s", wname, err.Error())
return
}
wrkIndx.Add(1)
} else {
logger.Info("no workers to delete")
}
})
rm.Start()
}