Integrated wal with ironhawk server #1661
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WalkthroughThe changes integrate write-ahead logging into the command execution and shard management processes. In the command execution flow (in Changes
Sequence Diagram(s)sequenceDiagram
participant Cmd as Command
participant WAL as WAL Interface
participant Handler as Command Handler
Cmd->>Handler: Execute command
alt Command is not a replay and WAL exists
Handler->>WAL: LogCommand(formatted command & args)
alt Logging fails
WAL-->>Handler: Return error
Handler-->>Cmd: Return result with error
else Logging succeeds
WAL-->>Handler: Acknowledge logging
Handler-->>Cmd: Continue execution
end
else
Handler-->>Cmd: Continue execution without logging
end
sequenceDiagram
participant Server as Server
participant SMConstructor as NewShardManager
participant WAL as WAL Instance
Server->>+SMConstructor: NewShardManager(numShards, serverErrCh, wal)
SMConstructor->>SMConstructor: Initialize ShardManager with new Wal field
SMConstructor-->>-Server: Return new ShardManager with WAL dependency
Poem
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Actionable comments posted: 0
🧹 Nitpick comments (1)
internal/cmd/cmds.go (1)
58-62: Good implementation of WAL integration for command execution.The code correctly logs non-replay commands to the Write-Ahead Log before execution, ensuring command durability. This approach properly handles error cases by returning early if logging fails.
Two suggestions for improvement:
- Consider using a more robust serialization method than string formatting for commands with complex arguments that might contain spaces or special characters.
- Add a debug log when WAL logging fails to help with troubleshooting.
if !c.IsReplay && sm.Wal != nil { - if err := sm.Wal.LogCommand([]byte(fmt.Sprintf("%s %s", c.C.Cmd, strings.Join(c.C.Args, " ")))); err != nil { + cmdStr := fmt.Sprintf("%s %s", c.C.Cmd, strings.Join(c.C.Args, " ")) + if err := sm.Wal.LogCommand([]byte(cmdStr)); err != nil { + slog.Debug("failed to log command to WAL", + slog.String("command", cmdStr), + slog.Any("error", err)) return res, err } }
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📒 Files selected for processing (3)
internal/cmd/cmds.go(1 hunks)internal/shardmanager/main.go(2 hunks)server/main.go(1 hunks)
🧰 Additional context used
🧬 Code Definitions (2)
server/main.go (1)
internal/shardmanager/main.go (1)
NewShardManager(28-43)
internal/shardmanager/main.go (1)
internal/shard/main.go (1)
Shard(8-11)
🔇 Additional comments (5)
server/main.go (1)
124-124: LGTM: Updated ShardManager instantiation to include WAL parameter.The change correctly passes the initialized WAL instance to the ShardManager constructor, enabling write-ahead logging functionality.
internal/shardmanager/main.go (4)
18-18: LGTM: Added import for WAL package.The import is correctly added to support the new WAL functionality in the ShardManager.
24-24: LGTM: Added WAL field to ShardManager struct.The field is appropriately named and has the correct type (wal.AbstractWAL).
28-28: LGTM: Updated constructor signature to include WAL parameter.The constructor now accepts a WAL instance as a parameter, which is a good approach for dependency injection.
41-41: LGTM: Added WAL assignment in ShardManager initialization.The WAL parameter is correctly assigned to the Wal field in the ShardManager struct.
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Integrated WAL with ironhawk engine by putting the initialized WAL in ShardManager struct and consuming it from there to Log the commands
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