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nacos.go
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nacos.go
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package source
import (
"fmt"
"github.com/mykube-run/kindling/pkg/log"
"github.com/mykube-run/kindling/pkg/utils"
"github.com/nacos-group/nacos-sdk-go/clients"
configclient "github.com/nacos-group/nacos-sdk-go/clients/config_client"
"github.com/nacos-group/nacos-sdk-go/common/constant"
"github.com/nacos-group/nacos-sdk-go/vo"
"net/url"
"strconv"
"strings"
)
var (
NacosTimeout uint64 = 5000
NacosLogDir = "/tmp/nacos/log"
NacosCacheDir = "/tmp/nacos/cache"
NacosLogLevel = "debug"
)
type nacos struct {
lg log.Logger
namespace string
group string
key string
client configclient.IConfigClient
eventC chan Event
closing bool
}
func NewNacosSource(addrs []string, namespace, group, key string, lg log.Logger) (ConfigSource, error) {
cfg := constant.ClientConfig{
NamespaceId: namespace,
TimeoutMs: NacosTimeout,
NotLoadCacheAtStart: true,
LogDir: NacosLogDir,
CacheDir: NacosCacheDir,
LogLevel: NacosLogLevel,
}
scs, err := ParseNacosAddrs(addrs)
if err != nil {
return nil, err
}
client, err := clients.NewConfigClient(vo.NacosClientParam{
ClientConfig: &cfg,
ServerConfigs: scs,
})
if err != nil {
return nil, fmt.Errorf("failed to create nacos config client: %w", err)
}
s := &nacos{
lg: lg,
namespace: namespace,
group: group,
key: key,
client: client,
eventC: make(chan Event, 1),
closing: false,
}
return s, nil
}
func (s *nacos) Read() ([]byte, error) {
v, err := s.client.GetConfig(vo.ConfigParam{
DataId: s.key,
Group: s.group,
})
if err != nil {
return nil, fmt.Errorf("failed to read config: %w", err)
}
return []byte(v), nil
}
func (s *nacos) Watch() (<-chan Event, error) {
fn := func(namespace, group, dataId, data string) {
if s.closing {
s.lg.Trace("nacos watcher has been closed, ignore event")
return
}
byt := []byte(data)
e := Event{
Md5: utils.Md5(byt),
Data: byt,
}
s.lg.Trace(fmt.Sprintf("namespace: %v, group: %v, key: %v, md5: %v", s.namespace, s.group, s.key, e.Md5))
s.eventC <- e
}
err := s.client.ListenConfig(vo.ConfigParam{
DataId: s.key,
Group: s.group,
OnChange: fn,
})
if err != nil {
return nil, fmt.Errorf("failed to watch nacos config: %w", err)
}
return s.eventC, nil
}
func (s *nacos) Close() error {
s.closing = true
if err := s.client.CancelListenConfig(vo.ConfigParam{
DataId: s.key,
Group: s.group,
}); err != nil {
return err
}
close(s.eventC)
return nil
}
func ParseNacosAddrs(addrs []string) ([]constant.ServerConfig, error) {
scs := make([]constant.ServerConfig, 0, len(addrs))
for _, v := range addrs {
sc := constant.ServerConfig{}
if !strings.HasPrefix(v, "http") {
v = "http://" + v
}
u, err := url.Parse(v)
if err != nil {
return nil, fmt.Errorf("failed to parse url (%v): %w", v, err)
}
sc.Scheme = u.Scheme
port, err := strconv.Atoi(u.Port())
if err != nil {
return nil, fmt.Errorf("failed to parse port (%v): %w", v, err)
}
sc.Port = uint64(port)
spl := strings.Split(u.Host, ":")
sc.IpAddr = spl[0]
sc.ContextPath = u.Path
scs = append(scs, sc)
}
return scs, nil
}