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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,131 @@ | ||
| // 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 entry | ||
|
|
||
| import ( | ||
| "context" | ||
| "strconv" | ||
| "sync/atomic" | ||
| "time" | ||
|
|
||
| "github.com/pingcap/errors" | ||
| "github.com/pingcap/tiflow/cdc/model" | ||
| "github.com/pingcap/tiflow/pkg/filter" | ||
| "golang.org/x/sync/errgroup" | ||
| ) | ||
|
|
||
| // MounterGroup is a group of mounter workers | ||
| type MounterGroup interface { | ||
| Run(ctx context.Context) error | ||
| AddEvent(ctx context.Context, event *model.PolymorphicEvent) error | ||
| } | ||
|
|
||
| type mounterGroup struct { | ||
| schemaStorage SchemaStorage | ||
| inputCh []chan *model.PolymorphicEvent | ||
| tz *time.Location | ||
| filter filter.Filter | ||
| enableOldValue bool | ||
|
|
||
| workerNum int | ||
| index uint64 | ||
|
|
||
| changefeedID model.ChangeFeedID | ||
| } | ||
|
|
||
| const ( | ||
| defaultMounterWorkerNum = 16 | ||
| defaultInputChanSize = 256 | ||
| defaultMetricInterval = 15 * time.Second | ||
| ) | ||
|
|
||
| // NewMounterGroup return a group of mounters. | ||
| func NewMounterGroup( | ||
| schemaStorage SchemaStorage, | ||
| workerNum int, | ||
| enableOldValue bool, | ||
| filter filter.Filter, | ||
| tz *time.Location, | ||
| changefeedID model.ChangeFeedID, | ||
| ) *mounterGroup { | ||
| if workerNum <= 0 { | ||
| workerNum = defaultMounterWorkerNum | ||
| } | ||
| inputCh := make([]chan *model.PolymorphicEvent, workerNum) | ||
| for i := 0; i < workerNum; i++ { | ||
| inputCh[i] = make(chan *model.PolymorphicEvent, defaultInputChanSize) | ||
| } | ||
| return &mounterGroup{ | ||
| schemaStorage: schemaStorage, | ||
| inputCh: inputCh, | ||
| enableOldValue: enableOldValue, | ||
| filter: filter, | ||
| tz: tz, | ||
|
|
||
| workerNum: workerNum, | ||
|
|
||
| changefeedID: changefeedID, | ||
| } | ||
| } | ||
|
|
||
| func (m *mounterGroup) Run(ctx context.Context) error { | ||
| defer func() { | ||
| mounterGroupInputChanSizeGauge.DeleteLabelValues(m.changefeedID.Namespace, m.changefeedID.ID) | ||
| }() | ||
| g, ctx := errgroup.WithContext(ctx) | ||
| for i := 0; i < m.workerNum; i++ { | ||
| idx := i | ||
| g.Go(func() error { | ||
| return m.runWorker(ctx, idx) | ||
| }) | ||
| } | ||
| return g.Wait() | ||
| } | ||
|
|
||
| func (m *mounterGroup) runWorker(ctx context.Context, index int) error { | ||
| mounter := NewMounter(m.schemaStorage, m.changefeedID, m.tz, m.filter, m.enableOldValue) | ||
| rawCh := m.inputCh[index] | ||
| metrics := mounterGroupInputChanSizeGauge. | ||
| WithLabelValues(m.changefeedID.Namespace, m.changefeedID.ID, strconv.Itoa(index)) | ||
| ticker := time.NewTicker(defaultMetricInterval) | ||
| for { | ||
| var pEvent *model.PolymorphicEvent | ||
| select { | ||
| case <-ctx.Done(): | ||
| return errors.Trace(ctx.Err()) | ||
| case <-ticker.C: | ||
| metrics.Set(float64(len(rawCh))) | ||
| case pEvent = <-rawCh: | ||
| if pEvent.RawKV.OpType == model.OpTypeResolved { | ||
| pEvent.MarkFinished() | ||
| continue | ||
| } | ||
| err := mounter.DecodeEvent(ctx, pEvent) | ||
| if err != nil { | ||
| return errors.Trace(err) | ||
| } | ||
| pEvent.MarkFinished() | ||
| } | ||
| } | ||
| } | ||
|
|
||
| func (m *mounterGroup) AddEvent(ctx context.Context, event *model.PolymorphicEvent) error { | ||
| index := atomic.AddUint64(&m.index, 1) % uint64(m.workerNum) | ||
| select { | ||
| case <-ctx.Done(): | ||
| return ctx.Err() | ||
| case m.inputCh[index] <- event: | ||
| return nil | ||
| } | ||
| } |
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