mirror of https://github.com/tikv/client-go.git
145 lines
4.1 KiB
Go
145 lines
4.1 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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// See the License for the specific language governing permissions and
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// limitations under the License.
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// NOTE: The code in this file is based on code from the
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// TiDB project, licensed under the Apache License v 2.0
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//
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// https://github.com/pingcap/tidb/tree/cc5e161ac06827589c4966674597c137cc9e809c/store/tikv/tests/safepoint_test.go
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//
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// Copyright 2017 PingCAP, Inc.
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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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// See the License for the specific language governing permissions and
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// limitations under the License.
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package tikv_test
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import (
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"context"
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"fmt"
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"testing"
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"time"
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"github.com/pingcap/errors"
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"github.com/pingcap/parser/terror"
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"github.com/stretchr/testify/suite"
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"github.com/tikv/client-go/v2/error"
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"github.com/tikv/client-go/v2/tikv"
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)
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func TestSafepoint(t *testing.T) {
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suite.Run(t, new(testSafePointSuite))
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}
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type testSafePointSuite struct {
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suite.Suite
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store tikv.StoreProbe
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prefix string
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}
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func (s *testSafePointSuite) SetupSuite() {
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s.store = tikv.StoreProbe{KVStore: NewTestStore(s.T())}
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s.prefix = fmt.Sprintf("seek_%d", time.Now().Unix())
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}
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func (s *testSafePointSuite) TearDownSuite() {
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err := s.store.Close()
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s.Require().Nil(err)
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}
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func (s *testSafePointSuite) beginTxn() tikv.TxnProbe {
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txn, err := s.store.Begin()
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s.Require().Nil(err)
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return txn
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}
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func mymakeKeys(rowNum int, prefix string) [][]byte {
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keys := make([][]byte, 0, rowNum)
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for i := 0; i < rowNum; i++ {
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k := encodeKey(prefix, s08d("key", i))
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keys = append(keys, k)
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}
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return keys
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}
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func (s *testSafePointSuite) waitUntilErrorPlugIn(t uint64) {
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for {
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s.store.SaveSafePoint(t + 10)
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cachedTime := time.Now()
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newSafePoint, err := s.store.LoadSafePoint()
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if err == nil {
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s.store.UpdateSPCache(newSafePoint, cachedTime)
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break
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}
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time.Sleep(time.Second)
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}
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}
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func (s *testSafePointSuite) TestSafePoint() {
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txn := s.beginTxn()
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for i := 0; i < 10; i++ {
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err := txn.Set(encodeKey(s.prefix, s08d("key", i)), valueBytes(i))
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s.Nil(err)
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}
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err := txn.Commit(context.Background())
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s.Nil(err)
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// for txn get
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txn2 := s.beginTxn()
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_, err = txn2.Get(context.TODO(), encodeKey(s.prefix, s08d("key", 0)))
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s.Nil(err)
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s.waitUntilErrorPlugIn(txn2.StartTS())
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_, geterr2 := txn2.Get(context.TODO(), encodeKey(s.prefix, s08d("key", 0)))
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s.NotNil(geterr2)
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_, isFallBehind := errors.Cause(geterr2).(*error.ErrGCTooEarly)
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isMayFallBehind := terror.ErrorEqual(errors.Cause(geterr2), error.NewErrPDServerTimeout("start timestamp may fall behind safe point"))
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isBehind := isFallBehind || isMayFallBehind
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s.True(isBehind)
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// for txn seek
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txn3 := s.beginTxn()
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s.waitUntilErrorPlugIn(txn3.StartTS())
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_, seekerr := txn3.Iter(encodeKey(s.prefix, ""), nil)
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s.NotNil(seekerr)
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_, isFallBehind = errors.Cause(geterr2).(*error.ErrGCTooEarly)
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isMayFallBehind = terror.ErrorEqual(errors.Cause(geterr2), error.NewErrPDServerTimeout("start timestamp may fall behind safe point"))
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isBehind = isFallBehind || isMayFallBehind
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s.True(isBehind)
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// for snapshot batchGet
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keys := mymakeKeys(10, s.prefix)
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txn4 := s.beginTxn()
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s.waitUntilErrorPlugIn(txn4.StartTS())
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_, batchgeterr := toTiDBTxn(&txn4).BatchGet(context.Background(), toTiDBKeys(keys))
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s.NotNil(batchgeterr)
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_, isFallBehind = errors.Cause(geterr2).(*error.ErrGCTooEarly)
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isMayFallBehind = terror.ErrorEqual(errors.Cause(geterr2), error.NewErrPDServerTimeout("start timestamp may fall behind safe point"))
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isBehind = isFallBehind || isMayFallBehind
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s.True(isBehind)
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}
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