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/atomic"
)
var lastId int64 = 1 // access via atomic
type Backend interface {
Run()
}
type Worker struct {
Backend Backend
Actions chan WorkerMessage
Messages chan WorkerMessage
Logger *log.Logger
actionCallbacks map[int64]func(msg WorkerMessage)
messageCallbacks map[int64]func(msg WorkerMessage)
}
func NewWorker(logger *log.Logger) *Worker {
return &Worker{
Actions: make(chan WorkerMessage, 50),
Messages: make(chan WorkerMessage, 50),
Logger: logger,
actionCallbacks: make(map[int64]func(msg WorkerMessage)),
messageCallbacks: make(map[int64]func(msg WorkerMessage)),
}
}
func (worker *Worker) setId(msg WorkerMessage) {
id := atomic.AddInt64(&lastId, 1)
msg.setId(id)
}
func (worker *Worker) PostAction(msg WorkerMessage,
cb func(msg WorkerMessage)) {
worker.setId(msg)
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
if cb != nil {
worker.actionCallbacks[msg.getId()] = cb
}
}
func (worker *Worker) PostMessage(msg WorkerMessage,
cb func(msg WorkerMessage)) {
worker.setId(msg)
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
if cb != nil {
worker.messageCallbacks[msg.getId()] = 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 inResponseTo := msg.InResponseTo(); inResponseTo != nil {
if f, ok := worker.actionCallbacks[inResponseTo.getId()]; ok {
f(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 inResponseTo := msg.InResponseTo(); inResponseTo != nil {
if f, ok := worker.messageCallbacks[inResponseTo.getId()]; ok {
f(msg)
}
}
return msg
}
|