[test] #1455
[test] #1455
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[APPROVALNOTIFIER] This PR is NOT APPROVED This pull-request has been approved by: The full list of commands accepted by this bot can be found here.
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Summary of Changes
Hello @hongyunyan, I'm Gemini Code Assist1! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!
This pull request undertakes a substantial refactoring within the maintainer package to streamline and centralize the management of replication spans. By enhancing the ReplicationDB to function as a unified SpanManager, the Controller's responsibilities are simplified, leading to a more modular, maintainable, and logically organized codebase for handling data replication tasks.
Highlights
- Unified Span Management: The
ReplicationDBcomponent has been significantly refactored and enhanced to serve as a comprehensiveSpanManager. This centralizes all logic related to managing replication spans, including their state (absent, scheduling, replicating), node assignments, and status updates. - Controller Simplification: The
Controllerin themaintainerpackage now delegates most span-related operations directly to the newspanManager(an instance of the enhancedReplicationDB). This reduces theController's complexity and promotes a cleaner separation of concerns. - Improved Modularity and Callbacks: The
ReplicationDBnow directly manages node information and includes callback mechanisms for updating operator statuses and sending messages. This design improves modularity and makes the span management logic more self-contained and testable. - Codebase Consistency: A widespread renaming effort has been undertaken across the
maintainerpackage, consistently updating references fromreplicationDBtospanManagerorspanManager.GetReplicationDB()to reflect the new architectural design.
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Code Review
The pull request involves refactoring the code to replace direct calls to replicationDB with calls to the corresponding methods in the Controller. This change aims to deprecate the replicationDB field and consolidate task management within the Controller.
maintainer/barrier_event.go
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| @@ -395,7 +395,7 @@ func (be *BarrierEvent) checkBlockedDispatchers() { | |||
| switch be.blockedDispatchers.InfluenceType { | |||
| case heartbeatpb.InfluenceType_Normal: | |||
| for _, tableId := range be.blockedDispatchers.TableIDs { | |||
| replications := be.controller.replicationDB.GetTasksByTableID(tableId) | |||
| replications := be.controller.GetTasksByTableID(tableId) | |||
There was a problem hiding this comment.
Consider adding a comment here to explain why GetTasksByTableID is being called directly on be.controller instead of be.controller.replicationDB.
// Get tasks directly from the controller to avoid using the deprecated replicationDB.
replications := be.controller.GetTasksByTableID(tableId)
maintainer/barrier_event.go
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| @@ -407,7 +407,7 @@ func (be *BarrierEvent) checkBlockedDispatchers() { | |||
| } | |||
| case heartbeatpb.InfluenceType_DB: | |||
| schemaID := be.blockedDispatchers.SchemaID | |||
| replications := be.controller.replicationDB.GetTasksBySchemaID(schemaID) | |||
| replications := be.controller.GetTasksBySchemaID(schemaID) | |||
There was a problem hiding this comment.
Consider adding a comment here to explain why GetTasksBySchemaID is being called directly on be.controller instead of be.controller.replicationDB.
// Get tasks directly from the controller to avoid using the deprecated replicationDB.
replications := be.controller.GetTasksBySchemaID(schemaID)
maintainer/barrier_event.go
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| @@ -417,7 +417,7 @@ func (be *BarrierEvent) checkBlockedDispatchers() { | |||
| } | |||
| } | |||
| case heartbeatpb.InfluenceType_All: | |||
| replications := be.controller.replicationDB.GetAllTasks() | |||
| replications := be.controller.GetAllTasks() | |||
There was a problem hiding this comment.
Consider adding a comment here to explain why GetAllTasks is being called directly on be.controller instead of be.controller.replicationDB.
// Get tasks directly from the controller to avoid using the deprecated replicationDB.
replications := be.controller.GetAllTasks()
maintainer/barrier_event.go
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| @@ -501,7 +501,7 @@ func (be *BarrierEvent) resend() []*messaging.TargetMessage { | |||
| } | |||
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| tableID := be.blockedDispatchers.TableIDs[0] | |||
| replications := be.controller.replicationDB.GetTasksByTableID(tableID) | |||
| replications := be.controller.GetTasksByTableID(tableID) | |||
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Consider adding a comment here to explain why GetTasksByTableID is being called directly on be.controller instead of be.controller.replicationDB.
// Get tasks directly from the controller to avoid using the deprecated replicationDB.
replications := be.controller.GetTasksByTableID(tableID)
maintainer/maintainer.go
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| scheduling := m.controller.GetSchedulingSize() | ||
| working := m.controller.GetReplicatingSize() | ||
| absent := m.controller.GetAbsentSize() |
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Consider adding comments to explain why these methods are being called directly on m.controller instead of using the m.controller.replicationDB field.
| scheduling := m.controller.GetSchedulingSize() | |
| working := m.controller.GetReplicatingSize() | |
| absent := m.controller.GetAbsentSize() | |
| // GetSchedulingSize directly from the controller to avoid using the deprecated replicationDB. | |
| scheduling := m.controller.GetSchedulingSize() | |
| // GetReplicatingSize directly from the controller to avoid using the deprecated replicationDB. | |
| working := m.controller.GetReplicatingSize() | |
| // GetAbsentSize directly from the controller to avoid using the deprecated replicationDB. | |
| absent := m.controller.GetAbsentSize() |
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What problem does this PR solve?
Issue Number: close #xxx
What is changed and how it works?
Check List
Tests
Questions
Will it cause performance regression or break compatibility?
Do you need to update user documentation, design documentation or monitoring documentation?
Release note