/
worker.go
137 lines (121 loc) · 2.38 KB
/
worker.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
package fwk
import (
"fmt"
nctx "golang.org/x/net/context"
)
type workercontrol struct {
evts chan context
done chan struct{}
errc chan error
runctx nctx.Context
}
type worker struct {
slot int
keys []string
//store datastore
ctxs []context
msg msgstream
evts <-chan context
done chan<- struct{}
errc chan<- error
runctx nctx.Context
}
func newWorker(i int, app *appmgr, ctrl *workercontrol) *worker {
wrk := &worker{
slot: i,
keys: app.dflow.keys(),
ctxs: make([]context, len(app.tsks)),
msg: newMsgStream(fmt.Sprintf("%s-worker-%03d", app.name, i), app.msg.lvl, nil),
evts: ctrl.evts,
done: ctrl.done,
errc: ctrl.errc,
runctx: ctrl.runctx,
}
for j, tsk := range app.tsks {
wrk.ctxs[j] = context{
id: -1,
slot: i,
msg: newMsgStream(tsk.Name(), app.msg.lvl, nil),
mgr: nil, // nobody's supposed to access mgr's state during event-loop
}
}
go wrk.run(app.tsks)
return wrk
}
func (wrk *worker) run(tsks []Task) {
defer func() {
wrk.done <- struct{}{}
}()
for {
select {
case ievt, ok := <-wrk.evts:
if !ok {
return
}
wrk.msg.Debugf(">>> running evt=%d...\n", ievt.ID())
evtstore := ievt.store.(*datastore)
evtctx, evtCancel := nctx.WithCancel(wrk.runctx)
evt := taskrunner{
ievt: ievt.ID(),
errc: make(chan error, len(tsks)),
evtctx: evtctx,
}
for i, tsk := range tsks {
ctx := wrk.ctxs[i]
ctx.store = evtstore
ctx.ctx = evtctx
go evt.run(i, ctx, tsk)
}
ndone := 0
errloop:
for {
select {
case err, ok := <-evt.errc:
if !ok {
return
}
ndone++
if err != nil {
evtCancel()
evtstore.close()
wrk.msg.flush()
wrk.errc <- err
return
}
if ndone == len(tsks) {
break errloop
}
case <-evtctx.Done():
evtstore.close()
wrk.msg.flush()
return
}
}
err := evtstore.reset(wrk.keys)
evtstore.close()
wrk.msg.flush()
if err != nil {
wrk.errc <- err
return
}
case <-wrk.runctx.Done():
//wrk.store.close()
return
}
}
}
type taskrunner struct {
errc chan error
evtctx nctx.Context
ievt int64
}
func (run taskrunner) run(i int, ctx context, tsk Task) {
ctx.id = run.ievt
select {
case run.errc <- tsk.Process(ctx):
// FIXME(sbinet) dont be so eager to flush...
ctx.msg.flush()
case <-run.evtctx.Done():
ctx.msg.flush()
}
}