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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,159 @@ | ||
| // Copyright 2022 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 sinkmanager | ||
|
|
||
| import ( | ||
| "context" | ||
|
|
||
| "github.com/pingcap/errors" | ||
| "github.com/pingcap/tiflow/cdc/entry" | ||
| "github.com/pingcap/tiflow/cdc/model" | ||
| "github.com/pingcap/tiflow/cdc/processor/sourcemanager/engine" | ||
| "github.com/pingcap/tiflow/cdc/redo" | ||
| ) | ||
|
|
||
| type redoWorker struct { | ||
| changefeedID model.ChangeFeedID | ||
| mg entry.MounterGroup | ||
| sortEngine engine.SortEngine | ||
| memQuota *memQuota | ||
| redoManager redo.LogManager | ||
| eventCache *redoEventCache | ||
| splitTxn bool | ||
| enableOldValue bool | ||
| } | ||
|
|
||
| func newRedoWorker( | ||
| changefeedID model.ChangeFeedID, | ||
| mg entry.MounterGroup, | ||
| sortEngine engine.SortEngine, | ||
| quota *memQuota, | ||
| redoManager redo.LogManager, | ||
| eventCache *redoEventCache, | ||
| splitTxn bool, | ||
| enableOldValue bool, | ||
| ) *redoWorker { | ||
| return &redoWorker{ | ||
| changefeedID: changefeedID, | ||
| mg: mg, | ||
| sortEngine: sortEngine, | ||
| memQuota: quota, | ||
| redoManager: redoManager, | ||
| eventCache: eventCache, | ||
| splitTxn: splitTxn, | ||
| enableOldValue: enableOldValue, | ||
| } | ||
| } | ||
|
|
||
| func (w *redoWorker) handleTasks(ctx context.Context, taskChan <-chan *redoTask) error { | ||
| for { | ||
| select { | ||
| case <-ctx.Done(): | ||
| return ctx.Err() | ||
| case task := <-taskChan: | ||
| if err := w.handleTask(ctx, task); err != nil { | ||
| return errors.Trace(err) | ||
| } | ||
| } | ||
| } | ||
| } | ||
|
|
||
| func (w *redoWorker) handleTask(ctx context.Context, task *redoTask) error { | ||
| rows := make([]*model.RowChangedEvent, 0, 1024) | ||
| cache := w.eventCache.getAppender(task.tableID) | ||
|
|
||
| // Events are pushed into redoEventCache if possible. Otherwise, their memory will | ||
| // be released after they are written into redo files. Then we need to release their | ||
| // memory quota, which can be calculated based on batchSize and cachedSize. | ||
| batchSize := uint64(0) | ||
| cachedSize := uint64(0) | ||
|
|
||
| memAllocated := true | ||
|
|
||
| var lastPos engine.Position | ||
| maybeEmitBatchEvents := func(allFinished, txnFinished bool) error { | ||
| if batchSize == 0 || (!allFinished && batchSize < requestMemSize) { | ||
| return nil | ||
| } | ||
|
|
||
| releaseMem := func() { w.memQuota.refund(batchSize - cachedSize) } | ||
| err := w.redoManager.EmitRowChangedEvents(ctx, task.tableID, releaseMem, rows...) | ||
| if err != nil { | ||
| return errors.Trace(err) | ||
| } | ||
| if lastPos.Valid() { | ||
| err = w.redoManager.UpdateResolvedTs(ctx, task.tableID, lastPos.CommitTs) | ||
| if err != nil { | ||
| return errors.Trace(err) | ||
| } | ||
| } | ||
|
|
||
| rows = rows[0:] | ||
| if cap(rows) > 1024 { | ||
| rows = make([]*model.RowChangedEvent, 0, 1024) | ||
| } | ||
| batchSize = 0 | ||
| cachedSize = 0 | ||
|
|
||
| if !allFinished { | ||
| if !txnFinished { | ||
| w.memQuota.forceAcquire(requestMemSize) | ||
| } else { | ||
| memAllocated = w.memQuota.tryAcquire(requestMemSize) | ||
| } | ||
| } | ||
| return nil | ||
| } | ||
|
|
||
| // lowerBound and upperBound are both closed intervals. | ||
| iter := engine.NewMountedEventIter( | ||
| w.sortEngine.FetchByTable(task.tableID, task.lowerBound, task.getUpperBound()), | ||
| w.mg, 256) | ||
| defer iter.Close() | ||
| for memAllocated { | ||
| e, pos, err := iter.Next(ctx) | ||
| if err != nil { | ||
| return errors.Trace(err) | ||
| } | ||
| if e == nil { | ||
| // There is no more data. | ||
| if err = maybeEmitBatchEvents(true, true); e != nil { | ||
| return errors.Trace(err) | ||
| } | ||
| return nil | ||
| } | ||
| if pos.Valid() { | ||
| lastPos = pos | ||
| } | ||
|
|
||
| x, size, err := convertRowChangedEvents(w.changefeedID, task.tableID, w.enableOldValue, e) | ||
| if err != nil { | ||
| return errors.Trace(err) | ||
| } | ||
|
|
||
| rows = append(rows, x...) | ||
| batchSize += size | ||
| if cache.pushBatch(x, size, pos.Valid()) { | ||
| cachedSize += size | ||
| } else { | ||
| cachedSize -= cache.cleanBrokenEvents() | ||
| } | ||
| if err = maybeEmitBatchEvents(false, pos.Valid()); err != nil { | ||
| return errors.Trace(err) | ||
| } | ||
| } | ||
| // Can't allocate memory. | ||
| task.callback(lastPos) | ||
| return nil | ||
| } |
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