forked from hashicorp/go-plugin
-
Notifications
You must be signed in to change notification settings - Fork 0
/
main.go
81 lines (67 loc) · 1.67 KB
/
main.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
package main
import (
"fmt"
"io/ioutil"
"log"
"os"
"os/exec"
"strconv"
"github.com/byzk-project-deploy/go-plugin"
"github.com/byzk-project-deploy/go-plugin/examples/bidirectional/shared"
)
type addHelper struct{}
func (*addHelper) Sum(a, b int64) (int64, error) {
return a + b, nil
}
func main() {
// We don't want to see the plugin logs.
log.SetOutput(ioutil.Discard)
// We're a host. Start by launching the plugin process.
client := plugin.NewClient(&plugin.ClientConfig{
HandshakeConfig: shared.Handshake,
Plugins: shared.PluginMap,
Cmd: exec.Command("sh", "-c", os.Getenv("COUNTER_PLUGIN")),
AllowedProtocols: []plugin.Protocol{
plugin.ProtocolNetRPC, plugin.ProtocolGRPC},
})
defer client.Kill()
// Connect via RPC
rpcClient, err := client.Client()
if err != nil {
fmt.Println("Error:", err.Error())
os.Exit(1)
}
// Request the plugin
raw, err := rpcClient.Dispense("counter")
if err != nil {
fmt.Println("Error:", err.Error())
os.Exit(1)
}
// We should have a Counter store now! This feels like a normal interface
// implementation but is in fact over an RPC connection.
counter := raw.(shared.Counter)
os.Args = os.Args[1:]
switch os.Args[0] {
case "get":
result, err := counter.Get(os.Args[1])
if err != nil {
fmt.Println("Error:", err.Error())
os.Exit(1)
}
fmt.Println(result)
case "put":
i, err := strconv.Atoi(os.Args[2])
if err != nil {
fmt.Println("Error:", err.Error())
os.Exit(1)
}
err = counter.Put(os.Args[1], int64(i), &addHelper{})
if err != nil {
fmt.Println("Error:", err.Error())
os.Exit(1)
}
default:
fmt.Println("Please only use 'get' or 'put'")
os.Exit(1)
}
}