Repository: DiceDB/dice
File: internal/worker/worker.go (Go)

Code before:
				}
			}

			err = w.isAuthenticated(cmds[0])
			if err != nil {
				werr := w.ioHandler.Write(ctx, err)
				if werr != nil {
					w.logger.Debug("Write error, connection closed possibly", slog.Any("error", errors.Join(err, werr)))
					return errors.Join(err, werr)
				}
			}
			// executeCommand executes the command and return the response back to the client
			func(errChan chan error) {
				execCtx, cancel := context.WithTimeout(ctx, 6*time.Second) // Timeout set to 6 seconds for integration tests
				defer cancel()
				w.executeCommandHandler(execCtx, errChan, cmds, false)
			}(errChan)
		case err := <-readErrChan:
			w.logger.Debug("Read error, connection closed possibly", slog.String("workerID", w.id), slog.Any("error", err))
			return err
		}
	}
}

func (w *BaseWorker) executeCommandHandler(execCtx context.Context, errChan chan error, cmds []*cmd.DiceDBCmd, isWatchChan bool) {
	err := w.executeCommand(execCtx, cmds[0], isWatchChan)
	if err != nil {
		w.logger.Error("Error executing command", slog.String("workerID", w.id), slog.Any("error", err))
		if errors.Is(err, net.ErrClosed) || errors.Is(err, syscall.EPIPE) || errors.Is(err, syscall.ECONNRESET) || errors.Is(err, syscall.ETIMEDOUT) {
			w.logger.Debug("Connection closed for worker", slog.String("workerID", w.id), slog.Any("error", err))
			errChan <- err
		}
	}
}

func (w *BaseWorker) executeCommand(ctx context.Context, diceDBCmd *cmd.DiceDBCmd, isWatchChan bool) error {
	// Break down the single command into multiple commands if multisharding is supported.
	// The length of cmdList helps determine how many shards to wait for responses.
	cmdList := make([]*cmd.DiceDBCmd, 0)

	// Retrieve metadata for the command to determine if multisharding is supported.
	meta, ok := CommandsMeta[diceDBCmd.Cmd]
	if !ok {
		// If no metadata exists, treat it as a single command and not migrated
		cmdList = append(cmdList, diceDBCmd)
	} else {
		// Depending on the command type, decide how to handle it.
		switch meta.CmdType {
		case Global:
			// If it's a global command, process it immediately without involving any shards.
			err := w.ioHandler.Write(ctx, meta.WorkerCommandHandler(diceDBCmd.Args))

Review comment (suggestion):
I feel this name is a little better?
```suggestion
	err := w.executeCommand(execCtx, cmds[0], isWatchNotification)
```

Code after:
				}
			}

			err = w.isAuthenticated(cmds[0])
			if err != nil {
				werr := w.ioHandler.Write(ctx, err)
				if werr != nil {
					w.logger.Debug("Write error, connection closed possibly", slog.Any("error", errors.Join(err, werr)))
					return errors.Join(err, werr)
				}
			}
			// executeCommand executes the command and return the response back to the client
			func(errChan chan error) {
				execCtx, cancel := context.WithTimeout(ctx, 6*time.Second) // Timeout set to 6 seconds for integration tests
				defer cancel()
				w.executeCommandHandler(execCtx, errChan, cmds, false)
			}(errChan)
		case err := <-readErrChan:
			w.logger.Debug("Read error, connection closed possibly", slog.String("workerID", w.id), slog.Any("error", err))
			return err
		}
	}
}

func (w *BaseWorker) executeCommandHandler(execCtx context.Context, errChan chan error, cmds []*cmd.DiceDBCmd, isWatchNotification bool) {
	err := w.executeCommand(execCtx, cmds[0], isWatchNotification)
	if err != nil {
		w.logger.Error("Error executing command", slog.String("workerID", w.id), slog.Any("error", err))
		if errors.Is(err, net.ErrClosed) || errors.Is(err, syscall.EPIPE) || errors.Is(err, syscall.ECONNRESET) || errors.Is(err, syscall.ETIMEDOUT) {
			w.logger.Debug("Connection closed for worker", slog.String("workerID", w.id), slog.Any("error", err))
			errChan <- err
		}
	}
}

func (w *BaseWorker) executeCommand(ctx context.Context, diceDBCmd *cmd.DiceDBCmd, isWatchNotification bool) error {
	// Break down the single command into multiple commands if multisharding is supported.
	// The length of cmdList helps determine how many shards to wait for responses.
	cmdList := make([]*cmd.DiceDBCmd, 0)

	// Retrieve metadata for the command to determine if multisharding is supported.
	meta, ok := CommandsMeta[diceDBCmd.Cmd]
	if !ok {
		// If no metadata exists, treat it as a single command and not migrated
		cmdList = append(cmdList, diceDBCmd)
	} else {
		// Depending on the command type, decide how to handle it.
		switch meta.CmdType {
		case Global:
			// If it's a global command, process it immediately without involving any shards.
			err := w.ioHandler.Write(ctx, meta.WorkerCommandHandler(diceDBCmd.Args))