-
Notifications
You must be signed in to change notification settings - Fork 0
/
ServiceController.go
166 lines (151 loc) · 4.01 KB
/
ServiceController.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
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
package ServiceController
import (
"context"
"sync"
"time"
"go.uber.org/zap"
)
type ServiceController struct {
logger *zap.Logger
ticker *time.Ticker
services *serviceRegistry
}
type ServiceManager struct {
l *zap.Logger
c *ServiceController
sync.Mutex
}
func NewServiceManager(l *zap.Logger) *ServiceManager {
return &ServiceManager{l: l}
}
func (m *ServiceManager) GetController() *ServiceController {
m.Lock()
defer m.Unlock()
if m.l == nil {
panic("Logger not initialized.")
}
if m.c == nil {
m.c = &ServiceController{
ticker: time.NewTicker(30 * time.Millisecond),
services: newServiceRegistry(),
}
m.c.logger = m.l.Named("svcManager")
if err := m.c.NewService(NewServiceConfig("default"), NewDefaultService()); err != nil {
m.c.logger.Panic("default service creation failed", zap.Error(err), zap.Stack("trace"))
}
}
return m.c
}
func (s *ServiceController) Log() *zap.Logger {
return s.logger
}
func (s *ServiceController) GetService(name string) Service {
return s.services.getService(name)
}
func (s *ServiceController) RestartService(name string) error {
svc := s.GetService(name)
if svc == nil {
return ServiceError{
Name: name,
Reason: "does not exist",
}
}
newsvc := svc.New()
cfg := svc.GetConfig()
s.Log().Info("Restarting Service", zap.String("ServiceName", name), zap.String("ServiceType", GetType(svc).String()))
return s.NewService(cfg, newsvc)
}
func (s *ServiceController) KillService(name string) error {
svc := s.GetService(name)
if svc == nil {
return ServiceError{
Name: name,
Reason: "does not exist",
}
}
s.Log().Info("Stopping Service", zap.String("ServiceName", name), zap.String("ServiceType", GetType(svc).String()))
if err := svc.Stop(); err != nil {
return err
}
s.services.deleteService(name)
// s.Lock()
// delete(s.services, name)
// s.Unlock()
return nil
}
func (s *ServiceController) NewService(config *ServiceConfig, svc Service) error {
msvc := s.GetService(config.Name())
if msvc != nil {
if err := s.KillService(config.Name()); err != nil {
return err
}
}
s.Log().Info("Creating service", zap.String("ServiceName", config.Name()), zap.String("ServiceType", GetType(svc).String()))
svc.SetLastRestart(time.Now())
// hystrix
//
// s.Lock()
// s.services[config.Name()] = svc
// s.Unlock()
s.services.addService(config.Name(), svc)
if err := svc.Init(s.Log().Named(config.Name()), config); err != nil {
svc.SetState(Failed)
return err
}
svc.SetState(Ready)
return nil
}
func (s *ServiceController) Run(ctx context.Context) error {
serviceSync := sync.WaitGroup{}
for {
serviceList := s.services.listServices()
select {
case <-ctx.Done():
s.Log().Warn("Interrupt Received, Waiting all processes to finish.")
serviceSync.Wait()
s.Log().Warn("Interrupt Received, Stopping all services.")
loopStop := sync.WaitGroup{}
loopStop.Add(len(serviceList))
for _, name := range serviceList {
go func(name string) {
defer loopStop.Done()
_ = s.KillService(name)
}(name)
}
loopStop.Wait()
return nil
case <-s.ticker.C:
for _, name := range serviceList {
svc := s.GetService(name)
if svc == nil {
continue
}
switch svc.GetState() {
case Failed:
serviceSync.Add(1)
go func(name string, svc Service) {
defer serviceSync.Done()
if time.Since(svc.GetLastRestart()) < 5*time.Second {
return
}
if err := s.RestartService(name); err != nil {
s.Log().Error("Restart Service failed", zap.Error(err), zap.String("ServiceName", name), zap.String("ServiceType", GetType(svc).String()))
}
}(name, svc)
case Ready:
serviceSync.Add(1)
go func(name string, svc Service) {
defer serviceSync.Done()
svc.SetState(Busy)
if err := svc.Run(); err != nil {
s.Log().Error("Run Failed", zap.Error(err), zap.String("ServiceName", name), zap.String("ServiceType", GetType(svc).String()))
svc.SetState(Failed)
return
}
svc.SetState(Ready)
}(name, svc)
}
}
}
}
}