130 lines
4.3 KiB
Go
130 lines
4.3 KiB
Go
// 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"
|
|
"time"
|
|
|
|
. "github.com/pingcap/check"
|
|
"github.com/pingcap/tidb/terror"
|
|
"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 := 5 * time.Millisecond
|
|
leaseGrantCh := make(chan leaseGrantItem)
|
|
oracleCh := make(chan uint64)
|
|
exit := make(chan struct{})
|
|
go serverFunc(lease, leaseGrantCh, oracleCh, exit)
|
|
|
|
validator := NewSchemaValidator(lease)
|
|
|
|
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.
|
|
reload(validator, leaseGrantCh, 0)
|
|
}
|
|
|
|
// Take a lease, check it's valid.
|
|
item := <-leaseGrantCh
|
|
validator.Update(item.leaseGrantTS, 0, item.schemaVer, nil)
|
|
valid := validator.Check(item.leaseGrantTS, item.schemaVer)
|
|
c.Assert(valid, IsTrue)
|
|
|
|
// Stop the validator, validator's items value is nil.
|
|
validator.Stop()
|
|
isTablesChanged, err := validator.IsRelatedTablesChanged(item.leaseGrantTS, item.schemaVer, nil)
|
|
c.Assert(terror.ErrorEqual(err, ErrInfoSchemaExpired), IsTrue)
|
|
c.Assert(isTablesChanged, IsFalse)
|
|
valid = validator.Check(item.leaseGrantTS, item.schemaVer)
|
|
c.Assert(valid, IsFalse)
|
|
validator.Restart()
|
|
|
|
// Sleep for a long time, check schema is invalid.
|
|
time.Sleep(lease)
|
|
ts := <-oracleCh
|
|
valid = validator.Check(ts, item.schemaVer)
|
|
c.Assert(valid, IsFalse)
|
|
|
|
currVer := reload(validator, leaseGrantCh, 0)
|
|
valid = validator.Check(ts, item.schemaVer)
|
|
c.Assert(valid, IsFalse)
|
|
// Check the latest schema version must changed.
|
|
c.Assert(item.schemaVer, Less, validator.Latest())
|
|
|
|
// Make sure newItem's version is bigger than currVer.
|
|
time.Sleep(lease * 2)
|
|
newItem := <-leaseGrantCh
|
|
// Update current schema version to newItem's version and the delta table IDs is 1, 2, 3.
|
|
validator.Update(ts, currVer, newItem.schemaVer, []int64{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, err = validator.IsRelatedTablesChanged(ts, currVer, nil)
|
|
c.Assert(err, IsNil)
|
|
c.Assert(isTablesChanged, IsFalse)
|
|
isTablesChanged, err = validator.IsRelatedTablesChanged(ts, currVer, []int64{2})
|
|
c.Assert(err, IsNil)
|
|
c.Assert(isTablesChanged, IsTrue)
|
|
// The current schema version is older than the oldest schema version.
|
|
isTablesChanged, err = validator.IsRelatedTablesChanged(ts, -1, nil)
|
|
c.Assert(terror.ErrorEqual(err, ErrInfoSchemaChanged), IsTrue)
|
|
c.Assert(isTablesChanged, IsFalse)
|
|
// All schema versions is expired.
|
|
ts = uint64(time.Now().Add(lease).UnixNano())
|
|
isTablesChanged, err = validator.IsRelatedTablesChanged(ts, currVer, nil)
|
|
c.Assert(terror.ErrorEqual(err, ErrInfoSchemaExpired), IsTrue)
|
|
c.Assert(isTablesChanged, IsFalse)
|
|
|
|
exit <- struct{}{}
|
|
}
|
|
|
|
func reload(validator SchemaValidator, leaseGrantCh chan leaseGrantItem, ids ...int64) int64 {
|
|
item := <-leaseGrantCh
|
|
validator.Update(item.leaseGrantTS, item.oldVer, item.schemaVer, ids)
|
|
return item.schemaVer
|
|
}
|
|
|
|
// 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{}) {
|
|
var version int64
|
|
leaseTS := uint64(time.Now().UnixNano())
|
|
ticker := time.NewTicker(lease)
|
|
for {
|
|
select {
|
|
case <-ticker.C:
|
|
version++
|
|
leaseTS = uint64(time.Now().UnixNano())
|
|
case requireLease <- leaseGrantItem{
|
|
leaseGrantTS: leaseTS,
|
|
oldVer: version - 1,
|
|
schemaVer: version,
|
|
}:
|
|
case oracleCh <- uint64(time.Now().UnixNano()):
|
|
case <-exit:
|
|
return
|
|
}
|
|
}
|
|
}
|