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
186
187
188
189
|
package roadrunner
import (
"context"
"fmt"
"os/exec"
"strings"
"github.com/pkg/errors"
"github.com/spiral/goridge/v2"
)
// PipeFactory connects to stack using standard
// streams (STDIN, STDOUT pipes).
type PipeFactory struct {
}
// NewPipeFactory returns new factory instance and starts
// listening
// todo: review tests
func NewPipeFactory() *PipeFactory {
return &PipeFactory{}
}
type SpawnResult struct {
w WorkerBase
err error
}
// SpawnWorker creates new WorkerProcess and connects it to goridge relay,
// method Wait() must be handled on level above.
func (f *PipeFactory) SpawnWorkerWithContext(ctx context.Context, cmd *exec.Cmd) (WorkerBase, error) {
c := make(chan SpawnResult)
go func() {
w, err := InitBaseWorker(cmd)
if err != nil {
c <- SpawnResult{
w: nil,
err: err,
}
return
}
// TODO why out is in?
in, err := cmd.StdoutPipe()
if err != nil {
c <- SpawnResult{
w: nil,
err: err,
}
return
}
// TODO why in is out?
out, err := cmd.StdinPipe()
if err != nil {
c <- SpawnResult{
w: nil,
err: err,
}
return
}
// Init new PIPE relay
relay := goridge.NewPipeRelay(in, out)
w.AttachRelay(relay)
// Start the worker
err = w.Start()
if err != nil {
c <- SpawnResult{
w: nil,
err: errors.Wrap(err, "process error"),
}
return
}
// errors bundle
var errs []string
if pid, errF := fetchPID(relay); pid != w.Pid() {
if errF != nil {
errs = append(errs, errF.Error())
}
// todo kill timeout
errK := w.Kill()
if errK != nil {
errs = append(errs, fmt.Errorf("error killing the worker with PID number %d, Created: %s", w.Pid(), w.Created()).Error())
}
if wErr := w.Wait(ctx); wErr != nil {
errs = append(errs, wErr.Error())
}
if len(errs) > 0 {
c <- SpawnResult{
w: nil,
err: errors.New(strings.Join(errs, " : ")),
}
} else {
c <- SpawnResult{
w: nil,
err: nil,
}
}
return
}
// everything ok, set ready state
w.State().Set(StateReady)
// return worker
c <- SpawnResult{
w: w,
err: nil,
}
}()
select {
case <-ctx.Done():
return nil, ctx.Err()
case res := <-c:
if res.err != nil {
return nil, res.err
}
return res.w, nil
}
}
func (f *PipeFactory) SpawnWorker(cmd *exec.Cmd) (WorkerBase, error) {
w, err := InitBaseWorker(cmd)
if err != nil {
return nil, err
}
// TODO why out is in?
in, err := cmd.StdoutPipe()
if err != nil {
return nil, err
}
// TODO why in is out?
out, err := cmd.StdinPipe()
if err != nil {
return nil, err
}
// Init new PIPE relay
relay := goridge.NewPipeRelay(in, out)
w.AttachRelay(relay)
// Start the worker
err = w.Start()
if err != nil {
return nil, errors.Wrap(err, "process error")
}
// errors bundle
var errs []string
if pid, errF := fetchPID(relay); pid != w.Pid() {
if errF != nil {
errs = append(errs, errF.Error())
}
errK := w.Kill()
if errK != nil {
errs = append(errs, fmt.Errorf("error killing the worker with PID number %d, Created: %s", w.Pid(), w.Created()).Error())
}
if wErr := w.Wait(context.Background()); wErr != nil {
errs = append(errs, wErr.Error())
}
if len(errs) > 0 {
return nil, errors.New(strings.Join(errs, "/"))
}
}
// everything ok, set ready state
w.State().Set(StateReady)
return w, nil
}
// Close the factory.
func (f *PipeFactory) Close(ctx context.Context) error {
return nil
}
|
