mirror of https://github.com/docker/docs.git
54 lines
1014 B
Go
54 lines
1014 B
Go
package file
|
|
|
|
import (
|
|
"io/ioutil"
|
|
"strings"
|
|
"time"
|
|
|
|
"github.com/docker/swarm/discovery"
|
|
)
|
|
|
|
type FileDiscoveryService struct {
|
|
heartbeat int
|
|
path string
|
|
}
|
|
|
|
func init() {
|
|
discovery.Register("file", &FileDiscoveryService{})
|
|
}
|
|
|
|
func (s *FileDiscoveryService) Initialize(path string, heartbeat int) error {
|
|
s.path = path
|
|
s.heartbeat = heartbeat
|
|
return nil
|
|
}
|
|
|
|
func (s *FileDiscoveryService) Fetch() ([]*discovery.Node, error) {
|
|
data, err := ioutil.ReadFile(s.path)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
var nodes []*discovery.Node
|
|
|
|
for _, line := range strings.Split(string(data), "\n") {
|
|
if line != "" {
|
|
nodes = append(nodes, discovery.NewNode(line))
|
|
}
|
|
}
|
|
return nodes, nil
|
|
}
|
|
|
|
func (s *FileDiscoveryService) Watch(callback discovery.WatchCallback) {
|
|
for _ = range time.Tick(time.Duration(s.heartbeat) * time.Second) {
|
|
nodes, err := s.Fetch()
|
|
if err == nil {
|
|
callback(nodes)
|
|
}
|
|
}
|
|
}
|
|
|
|
func (s *FileDiscoveryService) Register(addr string) error {
|
|
return discovery.ErrNotImplemented
|
|
}
|