---
id: 7864
title: Refactor SessionService for better error handling and config management
state: CLOSED
labels:
  - enhancement
  - ai
assignees:
  - tobiu
createdAt: '2025-11-22T19:03:34Z'
updatedAt: '2025-11-22T19:17:05Z'
githubUrl: 'https://github.com/neomjs/neo/issues/7864'
author: tobiu
commentsCount: 1
parentIssue: null
subIssues: []
subIssuesCompleted: 0
subIssuesTotal: 0
blockedBy: []
blocking: []
closedAt: '2025-11-22T19:17:05Z'
---
# Refactor SessionService for better error handling and config management

During a self-review of `ai/mcp/server/memory-core/services/SessionService.mjs`, the following potential improvements were identified:

1.  **Error Handling:** `findSessionsToSummarize` performs multiple database calls (memory fetch loop, summary fetch loop) without internal `try/catch` blocks. While the caller (`summarizeSessions` -> `initAsync`) likely handles errors, a failure in the *memory* fetch loop (e.g., partial network failure) currently causes the entire process to abort. Consider if granular error handling or retry logic is needed here.
2.  **Hardcoded Configuration:** The batch limit (`const limit = 2000;`) is hardcoded inside the method. This should be moved to `ai/mcp/server/memory-core/config.mjs` to allow for environment-based tuning (e.g., smaller batches for memory-constrained environments).
3.  **Loop Safety:** While `hasMore` is controlled by `batch.ids.length < limit`, adding a safety break (max iterations) could prevent infinite loops in case of weird driver behavior where it keeps returning full pages of the same data (though unlikely with `offset`).

**Goal:**
Refactor `SessionService.mjs` to address these code quality and robustness points.

## Timeline

- 2025-11-22T19:05:33Z @tobiu assigned to @tobiu
- 2025-11-22T19:05:44Z @tobiu added the `enhancement` label
- 2025-11-22T19:05:44Z @tobiu added the `ai` label
- 2025-11-22T19:16:19Z @tobiu referenced in commit `a2b3480` - "Refactor SessionService for better error handling and config management #7864"
### @tobiu - 2025-11-22T19:16:52Z

**Input from Gemini:**

> ✦ Refactoring completed.
> 
> **Summary of Changes:**
> 1.  **Config Management:** Added `summarizationBatchLimit` to `config.mjs` (default: 2000) to control database fetch sizes.
> 2.  **Robust Database Scanning:**
>     -   Updated `findSessionsToSummarize` to use pagination loops with safety breaks (`maxIterations: 1000`).
>     -   Ensured database queries use dynamically built configuration objects to avoid `where: undefined` errors.
>     -   Removed internal `try/catch` from `findSessionsToSummarize` to allow errors to propagate correctly.
> 3.  **Tool Error Handling:**
>     -   Updated `summarizeSessions` (the public tool method) to wrap logic in a `try/catch` block.
>     -   On failure, it now returns a structured error object (`{ error, message, code }`) instead of crashing or returning misleading empty results.
> 
> The service is now consistent with the project's error handling patterns and safe for large-scale deployments.

- 2025-11-22T19:17:05Z @tobiu closed this issue

