103 lines
2.2 KiB
Go
103 lines
2.2 KiB
Go
package storage
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import (
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"context"
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"encoding/json"
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"errors"
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"fmt"
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"time"
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"github.com/spf13/viper"
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clientv3 "go.etcd.io/etcd/client/v3"
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"go.etcd.io/etcd/client/v3/namespace"
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)
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type EtcdKVStore struct {
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Client *clientv3.Client
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}
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func NewEtcdKVStore(cfg *viper.Viper) (EtcdKVStore, error) {
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var (
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endpoints = cfg.GetStringSlice("storage.kv.etcd.endpoints")
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prefix = cfg.GetString("storage.kv.etcd.prefix")
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)
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cli, err := clientv3.New(clientv3.Config{
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Endpoints: endpoints,
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DialTimeout: 5 * time.Second,
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})
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if err != nil {
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return EtcdKVStore{}, err
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}
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cli.KV = namespace.NewKV(cli.KV, prefix)
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cli.Watcher = namespace.NewWatcher(cli.Watcher, prefix)
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cli.Lease = namespace.NewLease(cli.Lease, prefix)
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return EtcdKVStore{
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Client: cli,
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}, nil
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}
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func (s EtcdKVStore) Put(k string, v any) error {
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data, err := json.Marshal(v)
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if err != nil {
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return err
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}
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ctx, cancel := context.WithTimeout(context.Background(), 5*time.Second)
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_, err = s.Client.KV.Put(ctx, k, string(data))
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cancel()
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if err != nil {
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return err
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}
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return nil
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}
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func (s EtcdKVStore) PutWithTTL(k string, v any, duration time.Duration) error {
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lease, err := s.Client.Lease.Grant(context.TODO(), int64(duration.Seconds()))
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if err != nil {
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return err
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}
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data, err := json.Marshal(v)
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if err != nil {
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return err
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}
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ctx, cancel := context.WithTimeout(context.Background(), 5*time.Second)
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_, err = s.Client.KV.Put(ctx, k, string(data), clientv3.WithLease(lease.ID))
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cancel()
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if err != nil {
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return err
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}
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return nil
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}
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func (s EtcdKVStore) Get(k string) (any, error) {
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ctx, cancel := context.WithTimeout(context.Background(), 5*time.Second)
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resp, err := s.Client.KV.Get(ctx, k)
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cancel()
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if err != nil {
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return nil, err
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}
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for _, v := range resp.Kvs {
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var data any
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err := json.Unmarshal([]byte(v.Value), &data)
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if err != nil {
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return nil, err
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}
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// We return directly as we want to last revision of value
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return data, nil
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}
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return nil, errors.New(fmt.Sprintf("no value %v", k))
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}
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func (s EtcdKVStore) Delete(k string) error {
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ctx, cancel := context.WithTimeout(context.Background(), 5*time.Second)
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_, err := s.Client.KV.Delete(ctx, k)
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cancel()
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if err != nil {
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return err
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}
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return nil
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}
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