feat: support redis transaction

[panlei-coder]

#11

Summary by CodeRabbit

Summary by CodeRabbit

• New Features

  • Introduced a transaction management system allowing clients to watch keys, execute multi-commands, and handle notifications for changes.
  • Added new commands for transaction management: Multi, Watch, UnWatch, Exec, and Discard.
  • Enhanced command handling with improved error reporting and validation processes.
  • Added new response types and methods in the command response handling system.

• Bug Fixes

  • Improved error handling and command execution feedback for clients.

• Documentation

  • Updated test suite to reflect new naming conventions and transaction handling logic.

• Chores

  • Reduced the maximum number of databases from 16 to 6 in configuration.

[coderabbitai]

Walkthrough

The changes encompass modifications to several files within the codebase, including updates to naming conventions, enhancements in command handling and transaction management, the introduction of new methods and enumerators, and adjustments to configuration files. These alterations collectively improve the functionality and maintainability of the system, particularly in relation to command execution and error handling.

Changes

Files	Change Summary
src/base_cmd.h	Renamed constant kCmdNameUnwatch to kCmdNameUnWatch.
src/client.cc, src/client.h	Enhanced command handling in PClient, added new enumerators in CmdRes, and introduced new methods.
src/cmd_table_manager.cc	Added transaction-related commands in InitCmdTable.
src/cmd_thread_pool_worker.cc, src/cmd_thread_pool_worker.h	Updated error handling and declared cmd_table_manager_ as an external variable.
src/net/callback_function.h, src/net/event_server.h, src/net/thread_manager.h	Made formatting changes to improve readability without altering functionality.
src/store.cc, src/store.h	Introduced new overloaded Propagate functions and declared external variable g_dirtyKeys.
tests/assets/default.conf	Reduced the number of databases from 16 to 6.

Sequence Diagram(s)

sequenceDiagram
    participant Client
    participant PTransaction
    participant Database

    Client->>PTransaction: Watch(key)
    PTransaction->>Database: NotifyDirty(key)
    Database-->>PTransaction: Acknowledge
    PTransaction-->>Client: Confirmation

Loading

🐇 "In the garden where changes bloom,
New commands dance, dispelling gloom.
With each hop, I see the light,
Transactions handled, all feels right!
A world of data, bright and clear,
Hopping forward, no need to fear!" 🐇

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Recent review details

Commits

Files that changed from the base of the PR and between 540e641 and f0264f5.

Files selected for processing (12)

• src/base_cmd.h (1 hunks)
• src/client.cc (5 hunks)
• src/client.h (4 hunks)
• src/cmd_table_manager.cc (2 hunks)
• src/cmd_thread_pool_worker.cc (1 hunks)
• src/cmd_thread_pool_worker.h (2 hunks)
• src/net/callback_function.h (1 hunks)
• src/net/event_server.h (2 hunks)
• src/net/thread_manager.h (3 hunks)
• src/store.cc (2 hunks)
• src/store.h (1 hunks)
• tests/assets/default.conf (1 hunks)

---

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[longfar-ncy]

@Iam-WenYi 麻煩review一下

[Iam-WenYi]

需要做更多了解才行，现在还不可以下定论。
首先，项目目前是 Kiwi，已经不再是 PikiwiDB，因此注释方面需要调整。
指令方面，建议把 Multi 指令的注释迁移到 Multi 处，不要放在 Watch 处。
其它的话，可以看出这种事务的思路是参考了 Redis 的，即把要处理的任务放到一个队列之中，同时结合了 Kiwi 项目自身任务池的特点来的，但是我个人认为还需要进一步优化，因此还不能够予以通过。