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123 lines
3.6 KiB
123 lines
3.6 KiB
// 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
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import (
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"context"
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"fmt"
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"time"
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. "github.com/pingcap/check"
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"github.com/pingcap/errors"
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"github.com/pingcap/parser/terror"
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"github.com/pingcap/tidb/kv"
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)
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type testSafePointSuite struct {
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OneByOneSuite
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store *tikvStore
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prefix string
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}
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var _ = Suite(&testSafePointSuite{})
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func (s *testSafePointSuite) SetUpSuite(c *C) {
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s.OneByOneSuite.SetUpSuite(c)
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s.store = NewTestStore(c).(*tikvStore)
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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(c *C) {
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err := s.store.Close()
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c.Assert(err, IsNil)
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s.OneByOneSuite.TearDownSuite(c)
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}
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func (s *testSafePointSuite) beginTxn(c *C) *tikvTxn {
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txn, err := s.store.Begin()
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c.Assert(err, IsNil)
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return txn.(*tikvTxn)
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}
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func mymakeKeys(rowNum int, prefix string) []kv.Key {
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keys := make([]kv.Key, 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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saveSafePoint(s.store.GetSafePointKV(), t+10)
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cachedTime := time.Now()
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newSafePoint, err := loadSafePoint(s.store.GetSafePointKV())
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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(c *C) {
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txn := s.beginTxn(c)
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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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c.Assert(err, IsNil)
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}
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err := txn.Commit(context.Background())
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c.Assert(err, IsNil)
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// for txn get
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txn2 := s.beginTxn(c)
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_, err = txn2.Get(context.TODO(), encodeKey(s.prefix, s08d("key", 0)))
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c.Assert(err, IsNil)
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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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c.Assert(geterr2, NotNil)
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isFallBehind := terror.ErrorEqual(errors.Cause(geterr2), ErrGCTooEarly)
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isMayFallBehind := terror.ErrorEqual(errors.Cause(geterr2), ErrPDServerTimeout.GenWithStackByArgs("start timestamp may fall behind safe point"))
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isBehind := isFallBehind || isMayFallBehind
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c.Assert(isBehind, IsTrue)
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// for txn seek
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txn3 := s.beginTxn(c)
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s.waitUntilErrorPlugIn(txn3.startTS)
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_, seekerr := txn3.Iter(encodeKey(s.prefix, ""), nil)
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c.Assert(seekerr, NotNil)
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isFallBehind = terror.ErrorEqual(errors.Cause(geterr2), ErrGCTooEarly)
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isMayFallBehind = terror.ErrorEqual(errors.Cause(geterr2), ErrPDServerTimeout.GenWithStackByArgs("start timestamp may fall behind safe point"))
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isBehind = isFallBehind || isMayFallBehind
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c.Assert(isBehind, IsTrue)
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// for snapshot batchGet
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keys := mymakeKeys(10, s.prefix)
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txn4 := s.beginTxn(c)
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s.waitUntilErrorPlugIn(txn4.startTS)
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snapshot := newTiKVSnapshot(s.store, kv.Version{Ver: txn4.StartTS()}, 0)
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_, batchgeterr := snapshot.BatchGet(context.Background(), keys)
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c.Assert(batchgeterr, NotNil)
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isFallBehind = terror.ErrorEqual(errors.Cause(geterr2), ErrGCTooEarly)
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isMayFallBehind = terror.ErrorEqual(errors.Cause(geterr2), ErrPDServerTimeout.GenWithStackByArgs("start timestamp may fall behind safe point"))
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isBehind = isFallBehind || isMayFallBehind
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c.Assert(isBehind, IsTrue)
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}
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