mirror of https://github.com/tikv/client-go.git
81 lines
1.8 KiB
Go
81 lines
1.8 KiB
Go
// Copyright 2021 TiKV Authors
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package main
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import (
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"context"
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"flag"
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"fmt"
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"os"
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"github.com/tikv/client-go/v2/txnkv"
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"github.com/tikv/client-go/v2/util"
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)
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var (
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client *txnkv.Client
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pdAddr = flag.String("pd", "127.0.0.1:2379", "pd address")
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)
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// Init initializes information.
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func initStore() {
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var err error
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client, err = txnkv.NewClient([]string{*pdAddr})
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if err != nil {
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panic(err)
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}
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}
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func errMustBeNil(err error) {
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if err != nil {
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panic(err)
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}
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}
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func main() {
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pdAddr := os.Getenv("PD_ADDR")
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if pdAddr != "" {
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os.Args = append(os.Args, "-pd", pdAddr)
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}
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flag.Parse()
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initStore()
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txn, err := client.Begin()
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if err != nil {
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panic(err)
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}
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// it will try to use async commit.
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txn.SetEnableAsyncCommit(true)
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k1 := []byte("k1")
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k2 := []byte("k2")
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// Async commit wouldn't work if the number or the total size of updated keys exceed the limit:
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// - The number of keys to update should be less than 256(configable)
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// - The size of keys should less than 4KB(configable)
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err = txn.Set(k1, k1)
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errMustBeNil(err)
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err = txn.Set(k2, k2)
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errMustBeNil(err)
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ctx := context.Background()
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// async commit would not work if sessionID is 0(default value).
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util.SetSessionID(ctx, uint64(10001))
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err = txn.Commit(ctx)
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errMustBeNil(err)
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fmt.Println("Example for async commit: commit success!")
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}
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