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key.go
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key.go
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package client
import (
"context"
"time"
"github.com/Ferlab-Ste-Justine/etcd-sdk/keymodels"
clientv3 "go.etcd.io/etcd/client/v3"
)
func (cli *EtcdClient) putKeyWithRetries(key string, val string, retries uint64) error {
ctx, cancel := context.WithTimeout(context.Background(), cli.RequestTimeout)
defer cancel()
_, err := cli.Client.Put(ctx, key, val)
if err != nil {
if !shouldRetry(err, retries) {
return err
}
time.Sleep(100 * time.Millisecond)
return cli.putKeyWithRetries(key, val, retries - 1)
}
return nil
}
func (cli *EtcdClient) PutKey(key string, val string) error {
return cli.putKeyWithRetries(key, val, cli.Retries)
}
func (cli *EtcdClient) getKeyWithRetries(key string, revision int64, retries uint64) (keymodels.KeyInfo, bool, error) {
ctx, cancel := context.WithTimeout(context.Background(), cli.RequestTimeout)
defer cancel()
var err error
var getRes *clientv3.GetResponse
if revision == -1 {
getRes, err = cli.Client.Get(ctx, key)
} else {
getRes, err = cli.Client.Get(ctx, key, clientv3.WithRev(revision))
}
if err != nil {
if !shouldRetry(err, retries) {
return keymodels.KeyInfo{}, false, err
}
time.Sleep(100 * time.Millisecond)
return cli.getKeyWithRetries(key, revision, retries - 1)
}
if len(getRes.Kvs) == 0 {
return keymodels.KeyInfo{}, false, nil
}
return keymodels.KeyInfo{
Key: key,
Value: string(getRes.Kvs[0].Value),
Version: getRes.Kvs[0].Version,
CreateRevision: getRes.Kvs[0].CreateRevision,
ModRevision: getRes.Kvs[0].ModRevision,
Lease: getRes.Kvs[0].Lease,
}, true, nil
}
func (cli *EtcdClient) GetKey(key string) (keymodels.KeyInfo, bool, error) {
return cli.getKeyWithRetries(key, -1, cli.Retries)
}
func (cli *EtcdClient) GetKeyAtRevision(key string, revision int64) (keymodels.KeyInfo, bool, error) {
return cli.getKeyWithRetries(key, revision, cli.Retries)
}
func (cli *EtcdClient) deleteKeyWithRetries(key string, retries uint64) error {
ctx, cancel := context.WithTimeout(context.Background(), cli.RequestTimeout)
defer cancel()
_, err := cli.Client.Delete(ctx, key)
if err != nil {
if !shouldRetry(err, retries) {
return err
}
time.Sleep(100 * time.Millisecond)
return cli.deleteKeyWithRetries(key, retries - 1)
}
return nil
}
func (cli *EtcdClient) DeleteKey(key string) error {
return cli.deleteKeyWithRetries(key, cli.Retries)
}