Sync client in go and a tool to monitor sync for debugging using said client

[sergekh2]

No description provided.

[coderabbitai]

Walkthrough

This pull request introduces several new functionalities across multiple files, focusing on synchronization mechanisms in a distributed system. Key components include a stream checker for monitoring synchronization between blockchain and syncer states, a synchronization receiver for managing streaming updates, a command-line interface for debugging, and a generic typed wrapper around Go's sync.Map. These changes collectively enhance the system's ability to handle stream states and synchronization processes.

Changes

Files	Change Summary
core/client/syncer/checker/checker.go	Introduced streamChecker and streamState for monitoring synchronization; added methods for handling stream events and updates.
core/client/syncer/receiver.go	Implemented SyncReceiver interface and syncReceiver struct for managing streaming updates and states.
core/cmd/debug_cmd.go	Added CLI command for debugging synchronization from Ethereum nodes, including signal handling for graceful shutdowns.
core/utils/syncmap/typed.go	Created a generic typed wrapper around sync.Map for type-safe concurrent map operations.

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Recent review details

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Review profile: CHILL

Commits

Files that changed from the base of the PR and between 0bc97f9 and a5e7208.

Files selected for processing (4)

• core/client/syncer/checker/checker.go (1 hunks)
• core/client/syncer/receiver.go (1 hunks)
• core/cmd/debug_cmd.go (1 hunks)
• core/utils/syncmap/typed.go (1 hunks)

Additional comments not posted (20)

core/utils/syncmap/typed.go (7)

11-13: Approved: Method CompareAndDelete correctly delegates to sync.Map.

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15-17: Approved: Method CompareAndSwap correctly delegates to sync.Map.

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19-21: Approved: Method Delete correctly delegates to sync.Map.

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23-30: Approved: Method Load correctly handles type assertions and returns zero value appropriately.

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32-35: Approved: Method LoadOrStore correctly handles type assertions.

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37-41: Approved: Method Range correctly handles type conversions in the lambda function.

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47-54: Approved: Method Swap correctly handles type assertions and returns zero value appropriately.

core/client/syncer/checker/checker.go (11)

34-40: Initialization looks correct.

The newStreamState function correctly initializes the streamState struct.

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42-50: Proper synchronization handling.

The onUpdate function correctly uses mutex to ensure thread safety during updates.

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52-59: Correct synchronization logic.

The onSync function properly handles synchronization updates with appropriate locking mechanisms.

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62-65: Utility function implemented correctly.

The withinOne function is simple and serves its purpose effectively.

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99-110: Statistics tracking implemented correctly.

The streamCheckerStats struct is well-defined and correctly uses atomic operations for safe concurrent access.

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112-124: Core functionality structured well.

The streamChecker struct is central to the functionality and is well-structured to handle its responsibilities.

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126-191: Initialization and error handling are well-implemented.

The StartStreamChecker function correctly initializes components and handles errors appropriately, ensuring robustness.

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194-201: Event handling is correct.

The onAllocated function correctly handles the 'allocated' event, storing new stream states and updating statistics.

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203-220: Proper event and state management.

The onLastMiniblockUpdated function correctly handles the event and manages stream states effectively.

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226-244: Synchronization addition handled well.

The addToSync function effectively adds streams to synchronization, with appropriate error handling and logging.

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246-283: Main loop implemented correctly.

The run function is well-structured for handling updates and periodic logging of statistics.

core/cmd/debug_cmd.go (1)

16-35: Well-implemented function for debugging synchronization.

The use of context and channels for handling exit scenarios and system signals is correctly implemented.

core/client/syncer/receiver.go (1)

36-67: Proper initialization and error handling in StartSyncReceiver.

The function correctly initializes the SyncReceiver and handles potential errors robustly.

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[coderabbitai]

Actionable comments posted: 2

Outside diff range, codebase verification and nitpick comments (5)

core/cmd/debug_cmd.go (1)

38-54: Command setup is clear and follows best practices.

The setup for the debug sync command is well-structured. Consider adding more detail to the command description to enhance user understanding of its functionality.

core/client/syncer/receiver.go (4)

93-136: Efficient message handling in receive method.

The method efficiently handles different types of synchronization messages. Consider defining constants for repeated string literals like "syncId" to enhance maintainability.

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138-190: Well-structured update handling in synchronization.

The separation between handleUpdate and handleUpdateImpl ensures clarity and thread safety. Consider adding error handling for the channel send operation in handleUpdate.

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251-296: Robust stream addition mechanisms in AddStream and insertStream.

The methods handle errors and concurrency effectively. Improve the clarity of error messages to aid in debugging.

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309-340: Effective retry mechanism in retryDownStream.

The method uses exponential backoff and handles context cancellation effectively. Consider adding monitoring to confirm successful re-addition of streams.

[bas-vk]

Is it possible to send a ping periodically and store the last time the pong was received in stats?