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This is an automated cherry-pick of pingcap#6833
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,115 @@ | ||
| // 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 runtime | ||
|
|
||
| import ( | ||
| "time" | ||
|
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| "github.com/pingcap/tiflow/engine/framework" | ||
| frameModel "github.com/pingcap/tiflow/engine/framework/model" | ||
| ) | ||
|
|
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| // HeartbeatInterval is heartbeat interval for checking worker stage | ||
| // TODO: expose this config in lib | ||
| var HeartbeatInterval = 3 * time.Second | ||
|
|
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| /* | ||
| ,──────────────. ,────────────. ,─────────────. ,──────────────. | ||
| │WorkerCreating│ │WorkerOnline│ │WorkerOffline│ │WorkerFinished│ | ||
| `──────┬───────' `─────┬──────' `──────┬──────' `──────┬───────' | ||
| │ │ │ │ | ||
| CreateWorker │ │ │ │ | ||
| ───────────────►│ │ │ │ | ||
| │ OnWorkerOnline │ │ │ | ||
| ├───────────────────►│ │ │ | ||
| │ │ OnWorkerOffline │ │ | ||
| │ ├───────────────────►│ │ | ||
| │ │ │ │ | ||
| │ │ │ │ | ||
| │ │ OnWorkerFinished │ │ | ||
| │ ├────────────────────┼──────────────────►│ | ||
| │ │ │ │ | ||
| │ OnWorkerOffline/OnWorkerDispacth │ │ | ||
| ├────────────────────┬───────────────────►│ │ | ||
| │ │ │ │ | ||
| │ │ │ │ | ||
| │ │ │ │ | ||
| │ │ │ │ | ||
| │ OnWorkerFinished │ │ │ | ||
| ├────────────────────┼────────────────────┼──────────────────►│ | ||
| │ │ │ │ | ||
| │ │ │ │ | ||
| */ | ||
|
|
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| // WorkerStage represents the stage of a worker. | ||
| type WorkerStage int | ||
|
|
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| // All available WorkerStage | ||
| const ( | ||
| WorkerCreating WorkerStage = iota | ||
| WorkerOnline | ||
| WorkerFinished | ||
| WorkerOffline | ||
| // WorkerDestroying | ||
| ) | ||
|
|
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| // WorkerStatus manages worker state machine | ||
| type WorkerStatus struct { | ||
| TaskID string | ||
| ID frameModel.WorkerID | ||
| Unit framework.WorkerType | ||
| Stage WorkerStage | ||
| CfgModRevision uint64 | ||
| // only use when creating, change to updatedTime if needed. | ||
| createdTime time.Time | ||
| } | ||
|
|
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| // IsOffline checks whether worker stage is offline | ||
| func (w *WorkerStatus) IsOffline() bool { | ||
| return w.Stage == WorkerOffline | ||
| } | ||
|
|
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| // IsTombStone returns whether the worker is tombstone, which means we don't need to stop it. | ||
| func (w *WorkerStatus) IsTombStone() bool { | ||
| return w.Stage == WorkerOffline || w.Stage == WorkerFinished || w.CreateFailed() | ||
| } | ||
|
|
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| // CreateFailed checks whether the worker creation is failed | ||
| func (w *WorkerStatus) CreateFailed() bool { | ||
| return w.Stage == WorkerCreating && w.createdTime.Add(2*HeartbeatInterval).Before(time.Now()) | ||
| } | ||
|
|
||
| // RunAsExpected returns whether a worker is running. | ||
| // Currently, we regard worker run as expected except it is offline. | ||
| func (w *WorkerStatus) RunAsExpected() bool { | ||
| return w.Stage == WorkerOnline || w.Stage == WorkerCreating || w.Stage == WorkerFinished | ||
| } | ||
|
|
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| // InitWorkerStatus creates a new worker status and initializes it | ||
| func InitWorkerStatus(taskID string, unit framework.WorkerType, id frameModel.WorkerID) WorkerStatus { | ||
| workerStatus := NewWorkerStatus(taskID, unit, id, WorkerCreating, 0) | ||
| workerStatus.createdTime = time.Now() | ||
| return workerStatus | ||
| } | ||
|
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| // NewWorkerStatus creates a new WorkerStatus instance | ||
| func NewWorkerStatus(taskID string, unit framework.WorkerType, id frameModel.WorkerID, stage WorkerStage, cfgModRevision uint64) WorkerStatus { | ||
| return WorkerStatus{ | ||
| TaskID: taskID, | ||
| ID: id, | ||
| Unit: unit, | ||
| Stage: stage, | ||
| CfgModRevision: cfgModRevision, | ||
| } | ||
| } |
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