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client.go
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client.go
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// Copyright 2021 TiKV Authors
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package txnkv
import (
"context"
"fmt"
"github.com/ab111404212/tikv/client-go/v2/config"
"github.com/ab111404212/tikv/client-go/v2/internal/retry"
"github.com/ab111404212/tikv/client-go/v2/oracle"
"github.com/ab111404212/tikv/client-go/v2/tikv"
"github.com/ab111404212/tikv/client-go/v2/txnkv/transaction"
)
// Client is a txn client.
type Client struct {
*tikv.KVStore
}
// NewClient creates a txn client with pdAddrs.
func NewClient(pdAddrs []string) (*Client, error) {
cfg := config.GetGlobalConfig()
pdClient, err := tikv.NewPDClient(pdAddrs)
if err != nil {
return nil, err
}
// init uuid
uuid := fmt.Sprintf("tikv-%v", pdClient.GetClusterID(context.TODO()))
tlsConfig, err := cfg.Security.ToTLSConfig()
if err != nil {
return nil, err
}
spkv, err := tikv.NewEtcdSafePointKV(pdAddrs, tlsConfig)
if err != nil {
return nil, err
}
s, err := tikv.NewKVStore(uuid, pdClient, spkv, tikv.NewRPCClient(tikv.WithSecurity(cfg.Security)))
if err != nil {
return nil, err
}
if cfg.TxnLocalLatches.Enabled {
s.EnableTxnLocalLatches(cfg.TxnLocalLatches.Capacity)
}
return &Client{KVStore: s}, nil
}
// GetTimestamp returns the current global timestamp.
func (c *Client) GetTimestamp(ctx context.Context) (uint64, error) {
bo := retry.NewBackofferWithVars(ctx, transaction.TsoMaxBackoff, nil)
startTS, err := c.GetTimestampWithRetry(bo, oracle.GlobalTxnScope)
if err != nil {
return 0, err
}
return startTS, nil
}