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This is an automated cherry-pick of pingcap#4520
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| Original file line number | Diff line number | Diff line change |
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| // Copyright 2021 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 owner | ||
|
|
||
| import ( | ||
| "context" | ||
| "sync" | ||
| "sync/atomic" | ||
| "time" | ||
|
|
||
| "github.com/pingcap/errors" | ||
| "github.com/pingcap/failpoint" | ||
| "github.com/pingcap/log" | ||
| "github.com/pingcap/tiflow/cdc/model" | ||
| "github.com/pingcap/tiflow/cdc/sink" | ||
| cdcContext "github.com/pingcap/tiflow/pkg/context" | ||
| cerror "github.com/pingcap/tiflow/pkg/errors" | ||
| "github.com/pingcap/tiflow/pkg/filter" | ||
| "github.com/pingcap/tiflow/pkg/util" | ||
| "go.uber.org/zap" | ||
| ) | ||
|
|
||
| const ( | ||
| defaultErrChSize = 1024 | ||
| ) | ||
|
|
||
| // DDLSink is a wrapper of the `Sink` interface for the owner | ||
| // DDLSink should send `DDLEvent` and `CheckpointTs` to downstream sink, | ||
| // If `SyncPointEnabled`, also send `syncPoint` to downstream. | ||
| type DDLSink interface { | ||
| // run the DDLSink | ||
| run(ctx cdcContext.Context, id model.ChangeFeedID, info *model.ChangeFeedInfo) | ||
| // emitCheckpointTs emits the checkpoint Ts to downstream data source | ||
| // this function will return after recording the checkpointTs specified in memory immediately | ||
| // and the recorded checkpointTs will be sent and updated to downstream data source every second | ||
| emitCheckpointTs(ctx cdcContext.Context, ts uint64) | ||
| // emitDDLEvent emits DDL event and return true if the DDL is executed | ||
| // the DDL event will be sent to another goroutine and execute to downstream | ||
| // the caller of this function can call again and again until a true returned | ||
| emitDDLEvent(ctx cdcContext.Context, ddl *model.DDLEvent) (bool, error) | ||
| emitSyncPoint(ctx cdcContext.Context, checkpointTs uint64) error | ||
| // close the sink, cancel running goroutine. | ||
| close(ctx context.Context) error | ||
| } | ||
|
|
||
| type ddlSinkImpl struct { | ||
| lastSyncPoint model.Ts | ||
| syncPointStore sink.SyncpointStore | ||
|
|
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| checkpointTs model.Ts | ||
| ddlFinishedTs model.Ts | ||
| ddlSentTs model.Ts | ||
|
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| ddlCh chan *model.DDLEvent | ||
| errCh chan error | ||
|
|
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| sink sink.Sink | ||
| // `sinkInitHandler` can be helpful in unit testing. | ||
| sinkInitHandler ddlSinkInitHandler | ||
|
|
||
| // cancel would be used to cancel the goroutine start by `run` | ||
| cancel context.CancelFunc | ||
| wg sync.WaitGroup | ||
| } | ||
|
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| func newDDLSink() DDLSink { | ||
| return &ddlSinkImpl{ | ||
| ddlCh: make(chan *model.DDLEvent, 1), | ||
| errCh: make(chan error, defaultErrChSize), | ||
| sinkInitHandler: ddlSinkInitializer, | ||
| cancel: func() {}, | ||
| } | ||
| } | ||
|
|
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| type ddlSinkInitHandler func(ctx cdcContext.Context, a *ddlSinkImpl, id model.ChangeFeedID, info *model.ChangeFeedInfo) error | ||
|
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| func ddlSinkInitializer(ctx cdcContext.Context, a *ddlSinkImpl, id model.ChangeFeedID, info *model.ChangeFeedInfo) error { | ||
| filter, err := filter.NewFilter(info.Config) | ||
| if err != nil { | ||
| return errors.Trace(err) | ||
| } | ||
|
|
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| stdCtx := util.PutChangefeedIDInCtx(ctx, id) | ||
| stdCtx = util.PutRoleInCtx(stdCtx, util.RoleOwner) | ||
| s, err := sink.New(stdCtx, id, info.SinkURI, filter, info.Config, info.Opts, a.errCh) | ||
| if err != nil { | ||
| return errors.Trace(err) | ||
| } | ||
| a.sink = s | ||
|
|
||
| if !info.SyncPointEnabled { | ||
| return nil | ||
| } | ||
| syncPointStore, err := sink.NewSyncpointStore(stdCtx, id, info.SinkURI) | ||
| if err != nil { | ||
| return errors.Trace(err) | ||
| } | ||
| a.syncPointStore = syncPointStore | ||
|
|
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| if err := a.syncPointStore.CreateSynctable(stdCtx); err != nil { | ||
| return errors.Trace(err) | ||
| } | ||
| return nil | ||
| } | ||
|
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| func (s *ddlSinkImpl) run(ctx cdcContext.Context, id model.ChangeFeedID, info *model.ChangeFeedInfo) { | ||
| ctx, cancel := cdcContext.WithCancel(ctx) | ||
| s.cancel = cancel | ||
|
|
||
| s.wg.Add(1) | ||
| go func() { | ||
| defer s.wg.Done() | ||
|
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| start := time.Now() | ||
| if err := s.sinkInitHandler(ctx, s, id, info); err != nil { | ||
| log.Warn("ddl sink initialize failed", | ||
| zap.Duration("duration", time.Since(start))) | ||
| ctx.Throw(err) | ||
| return | ||
| } | ||
| log.Info("ddl sink initialized, start processing...", | ||
| zap.Duration("duration", time.Since(start))) | ||
|
|
||
| // TODO make the tick duration configurable | ||
| ticker := time.NewTicker(time.Second) | ||
| defer ticker.Stop() | ||
| var lastCheckpointTs model.Ts | ||
| for { | ||
| select { | ||
| case <-ctx.Done(): | ||
| return | ||
| case err := <-s.errCh: | ||
| ctx.Throw(err) | ||
| return | ||
| case <-ticker.C: | ||
| checkpointTs := atomic.LoadUint64(&s.checkpointTs) | ||
| if checkpointTs == 0 || checkpointTs <= lastCheckpointTs { | ||
| continue | ||
| } | ||
| lastCheckpointTs = checkpointTs | ||
| if err := s.sink.EmitCheckpointTs(ctx, checkpointTs); err != nil { | ||
| ctx.Throw(errors.Trace(err)) | ||
| return | ||
| } | ||
| case ddl := <-s.ddlCh: | ||
| err := s.sink.EmitDDLEvent(ctx, ddl) | ||
| failpoint.Inject("InjectChangefeedDDLError", func() { | ||
| err = cerror.ErrExecDDLFailed.GenWithStackByArgs() | ||
| }) | ||
| if err == nil || cerror.ErrDDLEventIgnored.Equal(errors.Cause(err)) { | ||
| log.Info("Execute DDL succeeded", | ||
| zap.String("changefeed", ctx.ChangefeedVars().ID), | ||
| zap.Bool("ignored", err != nil), | ||
| zap.Reflect("ddl", ddl)) | ||
| atomic.StoreUint64(&s.ddlFinishedTs, ddl.CommitTs) | ||
| continue | ||
| } | ||
| // If DDL executing failed, and the error can not be ignored, throw an error and pause the changefeed | ||
| log.Error("Execute DDL failed", | ||
| zap.String("changefeed", ctx.ChangefeedVars().ID), | ||
| zap.Error(err), | ||
| zap.Reflect("ddl", ddl)) | ||
| ctx.Throw(errors.Trace(err)) | ||
| return | ||
| } | ||
| } | ||
| }() | ||
| } | ||
|
|
||
| func (s *ddlSinkImpl) emitCheckpointTs(ctx cdcContext.Context, ts uint64) { | ||
| atomic.StoreUint64(&s.checkpointTs, ts) | ||
| } | ||
|
|
||
| func (s *ddlSinkImpl) emitDDLEvent(ctx cdcContext.Context, ddl *model.DDLEvent) (bool, error) { | ||
| ddlFinishedTs := atomic.LoadUint64(&s.ddlFinishedTs) | ||
| if ddl.CommitTs <= ddlFinishedTs { | ||
| // the DDL event is executed successfully, and done is true | ||
| return true, nil | ||
| } | ||
| if ddl.CommitTs <= s.ddlSentTs { | ||
| // the DDL event is executing and not finished yet, return false | ||
| return false, nil | ||
| } | ||
| select { | ||
| case <-ctx.Done(): | ||
| return false, errors.Trace(ctx.Err()) | ||
| case s.ddlCh <- ddl: | ||
| s.ddlSentTs = ddl.CommitTs | ||
| default: | ||
| // if this hit, we think that ddlCh is full, | ||
| // just return false and send the ddl in the next round. | ||
| } | ||
| return false, nil | ||
| } | ||
|
|
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| func (s *ddlSinkImpl) emitSyncPoint(ctx cdcContext.Context, checkpointTs uint64) error { | ||
| if checkpointTs == s.lastSyncPoint { | ||
| return nil | ||
| } | ||
| s.lastSyncPoint = checkpointTs | ||
| // TODO implement async sink syncPoint | ||
| return s.syncPointStore.SinkSyncpoint(ctx, ctx.ChangefeedVars().ID, checkpointTs) | ||
| } | ||
|
|
||
| func (s *ddlSinkImpl) close(ctx context.Context) (err error) { | ||
| s.cancel() | ||
| if s.sink != nil { | ||
| err = s.sink.Close(ctx) | ||
| } | ||
| if s.syncPointStore != nil { | ||
| err = s.syncPointStore.Close() | ||
| } | ||
| s.wg.Wait() | ||
| return err | ||
| } |
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