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schema_validator_test.go
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schema_validator_test.go
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// Copyright 2016 PingCAP, Inc.
//
// 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,
// See the License for the specific language governing permissions and
// limitations under the License.
package domain
import (
"math/rand"
"sync"
"time"
. "github.com/pingcap/check"
"github.com/pingcap/tidb/sessionctx/variable"
"github.com/pingcap/tidb/store/tikv"
"github.com/pingcap/tidb/store/tikv/oracle"
"github.com/pingcap/tidb/util/testleak"
)
type leaseGrantItem struct {
leaseGrantTS uint64
oldVer int64
schemaVer int64
}
func (*testSuite) TestSchemaValidator(c *C) {
defer testleak.AfterTest(c)()
lease := 10 * time.Millisecond
leaseGrantCh := make(chan leaseGrantItem)
oracleCh := make(chan uint64)
exit := make(chan struct{})
var wg sync.WaitGroup
wg.Add(1)
go serverFunc(lease, leaseGrantCh, oracleCh, exit, &wg)
validator := NewSchemaValidator(lease, nil).(*schemaValidator)
c.Assert(validator.IsStarted(), IsTrue)
for i := 0; i < 10; i++ {
delay := time.Duration(100+rand.Intn(900)) * time.Microsecond
time.Sleep(delay)
// Reload can run arbitrarily, at any time.
item := <-leaseGrantCh
validator.Update(item.leaseGrantTS, item.oldVer, item.schemaVer, nil)
}
// Take a lease, check it's valid.
item := <-leaseGrantCh
validator.Update(item.leaseGrantTS, item.oldVer, item.schemaVer,
&tikv.RelatedSchemaChange{PhyTblIDS: []int64{10}, ActionTypes: []uint64{10}})
_, valid := validator.Check(item.leaseGrantTS, item.schemaVer, []int64{10})
c.Assert(valid, Equals, ResultSucc)
// Stop the validator, validator's items value is nil.
validator.Stop()
c.Assert(validator.IsStarted(), IsFalse)
_, isTablesChanged := validator.isRelatedTablesChanged(item.schemaVer, []int64{10})
c.Assert(isTablesChanged, IsTrue)
_, valid = validator.Check(item.leaseGrantTS, item.schemaVer, []int64{10})
c.Assert(valid, Equals, ResultUnknown)
validator.Restart()
// Increase the current time by 2 leases, check schema is invalid.
ts := uint64(time.Now().Add(2 * lease).UnixNano()) // Make sure that ts has timed out a lease.
_, valid = validator.Check(ts, item.schemaVer, []int64{10})
c.Assert(valid, Equals, ResultUnknown, Commentf("validator latest schema ver %v, time %v, item schema ver %v, ts %v",
validator.latestSchemaVer, validator.latestSchemaExpire, 0, oracle.GetTimeFromTS(ts)))
// Make sure newItem's version is greater than item.schema.
newItem := getGreaterVersionItem(c, lease, leaseGrantCh, item.schemaVer)
currVer := newItem.schemaVer
validator.Update(newItem.leaseGrantTS, newItem.oldVer, currVer, nil)
_, valid = validator.Check(ts, item.schemaVer, nil)
c.Assert(valid, Equals, ResultFail, Commentf("currVer %d, newItem %v", currVer, item))
_, valid = validator.Check(ts, item.schemaVer, []int64{0})
c.Assert(valid, Equals, ResultFail, Commentf("currVer %d, newItem %v", currVer, item))
// Check the latest schema version must changed.
c.Assert(item.schemaVer, Less, validator.latestSchemaVer)
// Make sure newItem's version is greater than currVer.
newItem = getGreaterVersionItem(c, lease, leaseGrantCh, currVer)
// Update current schema version to newItem's version and the delta table IDs is 1, 2, 3.
validator.Update(ts, currVer, newItem.schemaVer, &tikv.RelatedSchemaChange{PhyTblIDS: []int64{1, 2, 3}, ActionTypes: []uint64{1, 2, 3}})
// Make sure the updated table IDs don't be covered with the same schema version.
validator.Update(ts, newItem.schemaVer, newItem.schemaVer, nil)
_, isTablesChanged = validator.isRelatedTablesChanged(currVer, nil)
c.Assert(isTablesChanged, IsFalse)
_, isTablesChanged = validator.isRelatedTablesChanged(currVer, []int64{2})
c.Assert(isTablesChanged, IsTrue, Commentf("currVer %d, newItem %v", currVer, newItem))
// The current schema version is older than the oldest schema version.
_, isTablesChanged = validator.isRelatedTablesChanged(-1, nil)
c.Assert(isTablesChanged, IsTrue, Commentf("currVer %d, newItem %v", currVer, newItem))
// All schema versions is expired.
ts = uint64(time.Now().Add(2 * lease).UnixNano())
_, valid = validator.Check(ts, newItem.schemaVer, nil)
c.Assert(valid, Equals, ResultUnknown)
close(exit)
wg.Wait()
}
func getGreaterVersionItem(c *C, lease time.Duration, leaseGrantCh chan leaseGrantItem, currVer int64) leaseGrantItem {
var newItem leaseGrantItem
for i := 0; i < 10; i++ {
time.Sleep(lease / 2)
newItem = <-leaseGrantCh
if newItem.schemaVer > currVer {
break
}
}
c.Assert(newItem.schemaVer, Greater, currVer, Commentf("currVer %d, newItem %v", currVer, newItem))
return newItem
}
// serverFunc plays the role as a remote server, runs in a separate goroutine.
// It can grant lease and provide timestamp oracle.
// Caller should communicate with it through channel to mock network.
func serverFunc(lease time.Duration, requireLease chan leaseGrantItem, oracleCh chan uint64, exit chan struct{}, wg *sync.WaitGroup) {
defer wg.Done()
var version int64
leaseTS := uint64(time.Now().UnixNano())
ticker := time.NewTicker(lease)
defer ticker.Stop()
for {
select {
case now := <-ticker.C:
version++
leaseTS = uint64(now.UnixNano())
case requireLease <- leaseGrantItem{
leaseGrantTS: leaseTS,
oldVer: version - 1,
schemaVer: version,
}:
case oracleCh <- uint64(time.Now().UnixNano()):
case <-exit:
return
}
}
}
func (*testSuite) TestEnqueue(c *C) {
lease := 10 * time.Millisecond
originalCnt := variable.GetMaxDeltaSchemaCount()
defer variable.SetMaxDeltaSchemaCount(originalCnt)
validator := NewSchemaValidator(lease, nil).(*schemaValidator)
c.Assert(validator.IsStarted(), IsTrue)
// maxCnt is 0.
variable.SetMaxDeltaSchemaCount(0)
validator.enqueue(1, &tikv.RelatedSchemaChange{PhyTblIDS: []int64{11}, ActionTypes: []uint64{11}})
c.Assert(validator.deltaSchemaInfos, HasLen, 0)
// maxCnt is 10.
variable.SetMaxDeltaSchemaCount(10)
ds := []deltaSchemaInfo{
{0, []int64{1}, []uint64{1}},
{1, []int64{1}, []uint64{1}},
{2, []int64{1}, []uint64{1}},
{3, []int64{2, 2}, []uint64{2, 2}},
{4, []int64{2}, []uint64{2}},
{5, []int64{1, 4}, []uint64{1, 4}},
{6, []int64{1, 4}, []uint64{1, 4}},
{7, []int64{3, 1, 3}, []uint64{3, 1, 3}},
{8, []int64{1, 2, 3}, []uint64{1, 2, 3}},
{9, []int64{1, 2, 3}, []uint64{1, 2, 3}},
}
for _, d := range ds {
validator.enqueue(d.schemaVersion, &tikv.RelatedSchemaChange{PhyTblIDS: d.relatedIDs, ActionTypes: d.relatedActions})
}
validator.enqueue(10, &tikv.RelatedSchemaChange{PhyTblIDS: []int64{1}, ActionTypes: []uint64{1}})
ret := []deltaSchemaInfo{
{0, []int64{1}, []uint64{1}},
{2, []int64{1}, []uint64{1}},
{3, []int64{2, 2}, []uint64{2, 2}},
{4, []int64{2}, []uint64{2}},
{6, []int64{1, 4}, []uint64{1, 4}},
{9, []int64{1, 2, 3}, []uint64{1, 2, 3}},
{10, []int64{1}, []uint64{1}},
}
c.Assert(validator.deltaSchemaInfos, DeepEquals, ret)
// The Items' relatedTableIDs have different order.
validator.enqueue(11, &tikv.RelatedSchemaChange{PhyTblIDS: []int64{1, 2, 3, 4}, ActionTypes: []uint64{1, 2, 3, 4}})
validator.enqueue(12, &tikv.RelatedSchemaChange{PhyTblIDS: []int64{4, 1, 2, 3, 1}, ActionTypes: []uint64{4, 1, 2, 3, 1}})
validator.enqueue(13, &tikv.RelatedSchemaChange{PhyTblIDS: []int64{4, 1, 3, 2, 5}, ActionTypes: []uint64{4, 1, 3, 2, 5}})
ret[len(ret)-1] = deltaSchemaInfo{13, []int64{4, 1, 3, 2, 5}, []uint64{4, 1, 3, 2, 5}}
c.Assert(validator.deltaSchemaInfos, DeepEquals, ret)
// The length of deltaSchemaInfos is greater then maxCnt.
validator.enqueue(14, &tikv.RelatedSchemaChange{PhyTblIDS: []int64{1}, ActionTypes: []uint64{1}})
validator.enqueue(15, &tikv.RelatedSchemaChange{PhyTblIDS: []int64{2}, ActionTypes: []uint64{2}})
validator.enqueue(16, &tikv.RelatedSchemaChange{PhyTblIDS: []int64{3}, ActionTypes: []uint64{3}})
validator.enqueue(17, &tikv.RelatedSchemaChange{PhyTblIDS: []int64{4}, ActionTypes: []uint64{4}})
ret = append(ret, deltaSchemaInfo{14, []int64{1}, []uint64{1}})
ret = append(ret, deltaSchemaInfo{15, []int64{2}, []uint64{2}})
ret = append(ret, deltaSchemaInfo{16, []int64{3}, []uint64{3}})
ret = append(ret, deltaSchemaInfo{17, []int64{4}, []uint64{4}})
c.Assert(validator.deltaSchemaInfos, DeepEquals, ret[1:])
}
func (*testSuite) TestEnqueueActionType(c *C) {
lease := 10 * time.Millisecond
originalCnt := variable.GetMaxDeltaSchemaCount()
defer variable.SetMaxDeltaSchemaCount(originalCnt)
validator := NewSchemaValidator(lease, nil).(*schemaValidator)
c.Assert(validator.IsStarted(), IsTrue)
// maxCnt is 0.
variable.SetMaxDeltaSchemaCount(0)
validator.enqueue(1, &tikv.RelatedSchemaChange{PhyTblIDS: []int64{11}, ActionTypes: []uint64{11}})
c.Assert(validator.deltaSchemaInfos, HasLen, 0)
// maxCnt is 10.
variable.SetMaxDeltaSchemaCount(10)
ds := []deltaSchemaInfo{
{0, []int64{1}, []uint64{1}},
{1, []int64{1}, []uint64{1}},
{2, []int64{1}, []uint64{1}},
{3, []int64{2, 2}, []uint64{2, 2}},
{4, []int64{2}, []uint64{2}},
{5, []int64{1, 4}, []uint64{1, 4}},
{6, []int64{1, 4}, []uint64{1, 4}},
{7, []int64{3, 1, 3}, []uint64{3, 1, 3}},
{8, []int64{1, 2, 3}, []uint64{1, 2, 3}},
{9, []int64{1, 2, 3}, []uint64{1, 2, 4}},
}
for _, d := range ds {
validator.enqueue(d.schemaVersion, &tikv.RelatedSchemaChange{PhyTblIDS: d.relatedIDs, ActionTypes: d.relatedActions})
}
validator.enqueue(10, &tikv.RelatedSchemaChange{PhyTblIDS: []int64{1}, ActionTypes: []uint64{15}})
ret := []deltaSchemaInfo{
{0, []int64{1}, []uint64{1}},
{2, []int64{1}, []uint64{1}},
{3, []int64{2, 2}, []uint64{2, 2}},
{4, []int64{2}, []uint64{2}},
{6, []int64{1, 4}, []uint64{1, 4}},
{8, []int64{1, 2, 3}, []uint64{1, 2, 3}},
{9, []int64{1, 2, 3}, []uint64{1, 2, 4}},
{10, []int64{1}, []uint64{15}},
}
c.Assert(validator.deltaSchemaInfos, DeepEquals, ret)
// Check the flag set by schema diff, note tableID = 3 has been set flag 0x3 in schema version 9, and flag 0x4
// in schema version 10, so the resActions for tableID = 3 should be 0x3 & 0x4 = 0x7.
relatedChanges, isTablesChanged := validator.isRelatedTablesChanged(5, []int64{1, 2, 3, 4})
c.Assert(isTablesChanged, Equals, true)
c.Assert(relatedChanges.PhyTblIDS, DeepEquals, []int64{1, 2, 3, 4})
c.Assert(relatedChanges.ActionTypes, DeepEquals, []uint64{15, 2, 7, 4})
}