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
|
package types
import (
"log"
"sync"
)
type Backend interface {
Run()
}
type Worker struct {
Backend Backend
Actions chan WorkerMessage
Messages chan WorkerMessage
Logger *log.Logger
callbacks map[WorkerMessage]func(msg WorkerMessage) // protected by mutex
mutex sync.Mutex
}
func NewWorker(logger *log.Logger) *Worker {
return &Worker{
Actions: make(chan WorkerMessage, 50),
Messages: make(chan WorkerMessage, 50),
Logger: logger,
callbacks: make(map[WorkerMessage]func(msg WorkerMessage)),
}
}
func (worker *Worker) setCallback(msg WorkerMessage,
cb func(msg WorkerMessage)) {
if cb != nil {
worker.mutex.Lock()
worker.callbacks[msg] = cb
worker.mutex.Unlock()
}
}
func (worker *Worker) getCallback(msg WorkerMessage) (func(msg WorkerMessage),
bool) {
worker.mutex.Lock()
cb, ok := worker.callbacks[msg]
worker.mutex.Unlock()
return cb, ok
}
func (worker *Worker) PostAction(msg WorkerMessage,
cb func(msg WorkerMessage)) {
if resp := msg.InResponseTo(); resp != nil {
worker.Logger.Printf("(ui)=> %T:%T\n", msg, resp)
} else {
worker.Logger.Printf("(ui)=> %T\n", msg)
}
worker.Actions <- msg
worker.setCallback(msg, cb)
}
func (worker *Worker) PostMessage(msg WorkerMessage,
cb func(msg WorkerMessage)) {
if resp := msg.InResponseTo(); resp != nil {
worker.Logger.Printf("->(ui) %T:%T\n", msg, resp)
} else {
worker.Logger.Printf("->(ui) %T\n", msg)
}
worker.Messages <- msg
worker.setCallback(msg, cb)
}
func (worker *Worker) ProcessMessage(msg WorkerMessage) WorkerMessage {
if resp := msg.InResponseTo(); resp != nil {
worker.Logger.Printf("(ui)<= %T:%T\n", msg, resp)
} else {
worker.Logger.Printf("(ui)<= %T\n", msg)
}
if cb, ok := worker.getCallback(msg.InResponseTo()); ok {
cb(msg)
}
return msg
}
func (worker *Worker) ProcessAction(msg WorkerMessage) WorkerMessage {
if resp := msg.InResponseTo(); resp != nil {
worker.Logger.Printf("<-(ui) %T:%T\n", msg, resp)
} else {
worker.Logger.Printf("<-(ui) %T\n", msg)
}
if cb, ok := worker.getCallback(msg.InResponseTo()); ok {
cb(msg)
}
return msg
}
|
