micro/config/source/service/service.go
2020-05-27 12:12:34 +01:00

107 lines
2.2 KiB
Go

package service
import (
"context"
"net/http"
"github.com/micro/go-micro/v2/client"
"github.com/micro/go-micro/v2/config/source"
proto "github.com/micro/go-micro/v2/config/source/service/proto"
"github.com/micro/go-micro/v2/errors"
"github.com/micro/go-micro/v2/logger"
)
var (
DefaultName = "go.micro.config"
DefaultNamespace = "global"
DefaultPath = ""
)
type service struct {
serviceName string
namespace string
path string
opts source.Options
client proto.ConfigService
}
func (m *service) Read() (set *source.ChangeSet, err error) {
client := proto.NewConfigService(m.serviceName, m.opts.Client)
req, err := client.Read(context.Background(), &proto.ReadRequest{
Namespace: m.namespace,
Path: m.path,
})
if verr, ok := err.(*errors.Error); ok && verr.Code == http.StatusNotFound {
return &source.ChangeSet{Data: []byte{}}, nil
} else if err != nil {
return nil, err
}
return toChangeSet(req.Change.ChangeSet), nil
}
func (m *service) Watch() (w source.Watcher, err error) {
client := proto.NewConfigService(m.serviceName, m.opts.Client)
stream, err := client.Watch(context.Background(), &proto.WatchRequest{
Namespace: m.namespace,
Path: m.path,
})
if err != nil {
if logger.V(logger.ErrorLevel, logger.DefaultLogger) {
logger.Error("watch err: ", err)
}
return
}
return newWatcher(stream)
}
// Write is unsupported
func (m *service) Write(cs *source.ChangeSet) error {
return nil
}
func (m *service) String() string {
return "service"
}
func NewSource(opts ...source.Option) source.Source {
var options source.Options
for _, o := range opts {
o(&options)
}
addr := DefaultName
namespace := DefaultNamespace
path := DefaultPath
if options.Context != nil {
a, ok := options.Context.Value(serviceNameKey{}).(string)
if ok {
addr = a
}
k, ok := options.Context.Value(namespaceKey{}).(string)
if ok {
namespace = k
}
p, ok := options.Context.Value(pathKey{}).(string)
if ok {
path = p
}
}
if options.Client == nil {
options.Client = client.DefaultClient
}
s := &service{
serviceName: addr,
opts: options,
namespace: namespace,
path: path,
}
return s
}