-
Notifications
You must be signed in to change notification settings - Fork 0
/
launcher.go
185 lines (157 loc) · 4.02 KB
/
launcher.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
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
package launcher
import (
"context"
"fmt"
"os"
"os/signal"
"slices"
"sync"
"github.com/tkcrm/mx/ops"
"github.com/tkcrm/mx/service"
signalutil "github.com/tkcrm/mx/util/signal"
"golang.org/x/sync/errgroup"
)
type ILauncher interface {
// Run launcher and all services
Run() error
// Stop launcher and all services
Stop()
// ServicesRunner return services runner
ServicesRunner() IServicesRunner
// Context return global context
Context() context.Context
}
type launcher struct {
opts Options
cancelFn context.CancelFunc
servicesRunner *servicesRunner
}
// New creates a new launcher
func New(opts ...Option) ILauncher {
l := &launcher{
opts: newOptions(opts...),
}
ctx, cancel := context.WithCancel(l.opts.Context)
l.opts.Context = ctx
l.cancelFn = cancel
l.servicesRunner = newServicesRunner(l.opts.Context, l.opts.logger)
return l
}
// Run runs launcher and all services
func (l *launcher) Run() error {
// register ops services
if l.opts.OpsConfig.Enabled {
if l.opts.OpsConfig.Healthy.Enabled {
l.opts.OpsConfig.Healthy.AddServicesList(l.servicesRunner.hcServices())
}
opsSvcs := ops.New(l.opts.logger, l.opts.OpsConfig)
svcs := make([]*service.Service, len(opsSvcs))
for i := range opsSvcs {
svcs[i] = service.New(service.WithService(opsSvcs[i]))
}
l.servicesRunner.Register(svcs...)
}
// before start
for _, fn := range l.opts.BeforeStart {
if err := fn(); err != nil {
return err
}
}
// start service
errChan := make(chan error, len(l.servicesRunner.Services()))
graceWait := new(sync.WaitGroup)
graceWait.Add(len(l.servicesRunner.Services()))
for i := range l.servicesRunner.Services() {
go func(svc *service.Service) {
defer graceWait.Done()
if err := svc.Start(); err != nil {
err := fmt.Errorf("failed to start service [%s]: %w", svc.Name(), err)
errChan <- err
}
}(l.servicesRunner.Services()[i])
}
// after start
for _, fn := range l.opts.AfterStart {
if err := fn(); err != nil {
return err
}
}
if l.opts.AppStartStopLog {
l.opts.logger.Infoln("app", l.opts.Name, "was started")
}
ch := make(chan os.Signal, 1)
if l.opts.Signal {
signal.Notify(ch, signalutil.Shutdown()...)
}
select {
// wait on services error
case err := <-errChan:
return err
// wait on kill signal
case <-ch:
l.cancelFn()
// wait on context cancel
case <-l.opts.Context.Done():
}
graceWait.Wait()
var stopErr error
// before stop
for _, fn := range l.opts.BeforeStop {
if err := fn(); err != nil {
stopErr = err
}
}
// stop services
switch l.opts.RunnerServicesSequence {
case RunnerServicesSequenceNone:
{
g := new(errgroup.Group)
for i := range l.servicesRunner.Services() {
svc := l.servicesRunner.Services()[i]
g.Go(func() error {
if err := svc.Stop(); err != nil {
l.opts.logger.Errorf("failed to stop service [%s] error: %s", svc.Name(), err)
}
return nil
})
}
// wait stop group
g.Wait()
}
case RunnerServicesSequenceFifo:
{
for _, svc := range l.servicesRunner.Services() {
if err := svc.Stop(); err != nil {
l.opts.logger.Errorf("failed to stop service [%s] error: %s", svc.Name(), err)
}
}
}
case RunnerServicesSequenceLifo:
{
reverted := make([]*service.Service, len(l.servicesRunner.Services()))
copy(reverted, l.servicesRunner.Services())
slices.Reverse(reverted)
for _, svc := range reverted {
if err := svc.Stop(); err != nil {
l.opts.logger.Errorf("failed to stop service [%s] error: %s", svc.Name(), err)
}
}
}
}
// after stop
for _, fn := range l.opts.AfterStop {
if err := fn(); err != nil {
stopErr = err
}
}
if l.opts.AppStartStopLog {
l.opts.logger.Infoln("app", l.opts.Name, "was stopped")
}
return stopErr
}
// Stop stops launcher and all services
func (l *launcher) Stop() { l.cancelFn() }
// ServicesRunner returns services runner
func (l *launcher) ServicesRunner() IServicesRunner { return l.servicesRunner }
// Context returns global context
func (l *launcher) Context() context.Context { return l.opts.Context }