forked from pingcap/go-ycsb
/
db.go
163 lines (135 loc) · 3.64 KB
/
db.go
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package etcd
import (
"bytes"
"context"
"crypto/tls"
"encoding/json"
"fmt"
"strings"
"time"
clientv3 "go.etcd.io/etcd/client/v3"
"github.com/magiconair/properties"
"go.etcd.io/etcd/client/pkg/v3/transport"
"github.com/ikettaneh/go-ycsb/pkg/ycsb"
)
// properties
const (
etcdEndpoints = "etcd.endpoints"
etcdDialTimeout = "etcd.dial_timeout"
etcdCertFile = "etcd.cert_file"
etcdKeyFile = "etcd.key_file"
etcdCaFile = "etcd.cacert_file"
)
type etcdCreator struct{}
type etcdDB struct {
p *properties.Properties
client *clientv3.Client
}
func init() {
ycsb.RegisterDBCreator("etcd", etcdCreator{})
}
func (c etcdCreator) Create(p *properties.Properties) (ycsb.DB, error) {
cfg, err := getClientConfig(p)
if err != nil {
return nil, err
}
client, err := clientv3.New(*cfg)
if err != nil {
return nil, err
}
return &etcdDB{
p: p,
client: client,
}, nil
}
func getClientConfig(p *properties.Properties) (*clientv3.Config, error) {
endpoints := p.GetString(etcdEndpoints, "localhost:2379")
dialTimeout := p.GetDuration(etcdDialTimeout, 2*time.Second)
var tlsConfig *tls.Config
if strings.Contains(endpoints, "https") {
tlsInfo := transport.TLSInfo{
CertFile: p.MustGetString(etcdCertFile),
KeyFile: p.MustGetString(etcdKeyFile),
TrustedCAFile: p.MustGetString(etcdCaFile),
}
c, err := tlsInfo.ClientConfig()
if err != nil {
return nil, err
}
tlsConfig = c
}
return &clientv3.Config{
Endpoints: strings.Split(endpoints, ","),
DialTimeout: dialTimeout,
TLS: tlsConfig,
}, nil
}
func (db *etcdDB) Close() error {
return db.client.Close()
}
func (db *etcdDB) InitThread(ctx context.Context, _ int, _ int) context.Context {
return ctx
}
func (db *etcdDB) CleanupThread(_ context.Context) {
}
func getRowKey(table string, key string) string {
return fmt.Sprintf("%s:%s", table, key)
}
func (db *etcdDB) Read(ctx context.Context, table string, key string, _ []string) (map[string][]byte, error) {
rkey := getRowKey(table, key)
value, err := db.client.Get(ctx, rkey)
if err != nil {
return nil, err
}
if value.Count == 0 {
return nil, fmt.Errorf("could not find value for key [%s]", rkey)
}
var r map[string][]byte
err = json.NewDecoder(bytes.NewReader(value.Kvs[0].Value)).Decode(&r)
if err != nil {
return nil, err
}
return r, nil
}
func (db *etcdDB) Scan(ctx context.Context, table string, startKey string, count int, _ []string) ([]map[string][]byte, error) {
res := make([]map[string][]byte, count)
rkey := getRowKey(table, startKey)
values, err := db.client.Get(ctx, rkey, clientv3.WithFromKey(), clientv3.WithLimit(int64(count)))
if err != nil {
return nil, err
}
if values.Count != int64(count) {
return nil, fmt.Errorf("unexpected number of result for key [%s], expected %d but was %d", rkey, count, values.Count)
}
for _, v := range values.Kvs {
var r map[string][]byte
err = json.NewDecoder(bytes.NewReader(v.Value)).Decode(&r)
if err != nil {
return nil, err
}
res = append(res, r)
}
return res, nil
}
func (db *etcdDB) Update(ctx context.Context, table string, key string, values map[string][]byte) error {
rkey := getRowKey(table, key)
data, err := json.Marshal(values)
if err != nil {
return err
}
_, err = db.client.Put(ctx, rkey, string(data))
if err != nil {
return err
}
return nil
}
func (db *etcdDB) Insert(ctx context.Context, table string, key string, values map[string][]byte) error {
return db.Update(ctx, table, key, values)
}
func (db *etcdDB) Delete(ctx context.Context, table string, key string) error {
_, err := db.client.Delete(ctx, getRowKey(table, key))
if err != nil {
return err
}
return nil
}