-
Notifications
You must be signed in to change notification settings - Fork 110
/
client.go
101 lines (89 loc) · 1.98 KB
/
client.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
package shell
import (
"context"
"sync"
"github.com/edaniels/golog"
pb "go.viam.com/api/service/shell/v1"
"go.viam.com/utils"
"go.viam.com/utils/rpc"
)
// client implements ShellServiceClient.
type client struct {
name string
conn rpc.ClientConn
client pb.ShellServiceClient
logger golog.Logger
activeBackgroundWorkers sync.WaitGroup
}
// NewClientFromConn constructs a new Client from connection passed in.
func NewClientFromConn(ctx context.Context, conn rpc.ClientConn, name string, logger golog.Logger) Service {
grpcClient := pb.NewShellServiceClient(conn)
c := &client{
name: name,
conn: conn,
client: grpcClient,
logger: logger,
}
return c
}
func (c *client) Shell(ctx context.Context) (chan<- string, <-chan Output, error) {
client, err := c.client.Shell(ctx)
if err != nil {
return nil, nil, err
}
c.activeBackgroundWorkers.Add(2)
input := make(chan string)
output := make(chan Output)
utils.PanicCapturingGo(func() {
defer c.activeBackgroundWorkers.Done()
for {
select {
case dataIn, ok := <-input:
if ok {
if err := client.Send(&pb.ShellRequest{
Name: c.name,
DataIn: dataIn,
}); err != nil {
c.logger.Errorw("error sending data", "error", err)
return
}
} else {
if err := client.CloseSend(); err != nil {
c.logger.Errorw("error closing input via CloseSend", "error", err)
return
}
return
}
case <-ctx.Done():
return
}
}
})
utils.PanicCapturingGo(func() {
defer c.activeBackgroundWorkers.Done()
for {
resp, err := client.Recv()
if err != nil {
select {
case output <- Output{
EOF: true,
}:
case <-ctx.Done():
}
close(output)
return
}
select {
case output <- Output{
Output: resp.DataOut,
Error: resp.DataErr,
EOF: resp.Eof,
}:
case <-ctx.Done():
close(output)
return
}
}
})
return input, output, nil
}