-
Notifications
You must be signed in to change notification settings - Fork 3
/
plugin.go
40 lines (34 loc) · 1.05 KB
/
plugin.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
package plugin
import (
"fmt"
"plugin"
"github.com/bitflow-stream/go-bitflow/script/reg"
log "github.com/sirupsen/logrus"
)
const BitflowPluginSymbol = "Plugin"
type BitflowPlugin interface {
Init(registry reg.ProcessorRegistry) error
Name() string
}
func LoadPlugin(registry reg.ProcessorRegistry, path string) (string, error) {
return LoadPluginSymbol(registry, path, BitflowPluginSymbol)
}
func LoadPluginSymbol(registry reg.ProcessorRegistry, path string, symbol string) (string, error) {
log.Debugln("Loading plugin", path)
openedPlugin, err := plugin.Open(path)
if err != nil {
return "", err
}
symbolObject, err := openedPlugin.Lookup(symbol)
if err != nil {
return "", err
}
sourcePlugin, ok := symbolObject.(*BitflowPlugin)
if !ok || sourcePlugin == nil {
return "", fmt.Errorf("Symbol '%v' from plugin '%v' has type %T instead of plugin.BitflowPlugin",
symbol, path, symbolObject)
}
p := *sourcePlugin
log.Debugf("Initializing plugin '%v' loaded from symbol '%v' in %v...", p.Name(), symbol, path)
return p.Name(), p.Init(registry)
}