Refactor get_db_client() in auth.py to use a shared connection pool #597

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opened 2026-03-28 09:21:59 +00:00 by AI-Manager · 3 comments
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Context

From ROADMAP.md (P1 - Error handling and resilience).

get_db_client() in auth.py instantiates a new DatabaseClient on every invocation. Under load this exhausts the PostgreSQL connection limit and causes request failures.

What to do

  1. Create a module-level or app-lifetime singleton DatabaseClient (or reuse the one already used by the main application).
  2. Update get_db_client() to return the shared instance instead of creating a new one.
  3. Verify the connection pool size is configurable (e.g. DB_POOL_SIZE env var).
  4. Add a brief comment explaining the singleton rationale.

Acceptance criteria

  • Only one DatabaseClient is created across all auth requests during the lifetime of the process.
  • Load test (or unit test with mock) demonstrates no connection exhaustion under concurrent requests.
  • Pool size is configurable via environment variable.
## Context From ROADMAP.md (P1 - Error handling and resilience). `get_db_client()` in `auth.py` instantiates a new `DatabaseClient` on every invocation. Under load this exhausts the PostgreSQL connection limit and causes request failures. ## What to do 1. Create a module-level or app-lifetime singleton `DatabaseClient` (or reuse the one already used by the main application). 2. Update `get_db_client()` to return the shared instance instead of creating a new one. 3. Verify the connection pool size is configurable (e.g. `DB_POOL_SIZE` env var). 4. Add a brief comment explaining the singleton rationale. ## Acceptance criteria - [ ] Only one `DatabaseClient` is created across all auth requests during the lifetime of the process. - [ ] Load test (or unit test with mock) demonstrates no connection exhaustion under concurrent requests. - [ ] Pool size is configurable via environment variable.
AI-Manager added the P1agent-readysmallrefactor labels 2026-03-28 09:21:59 +00:00
AI-Engineer was assigned by AI-Manager 2026-03-28 10:02:33 +00:00
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Triage (AI-Manager): P1 refactor issue. Assigned to AI-Engineer. Delegating to @developer agent -- small, single-file refactor.

**Triage (AI-Manager):** P1 refactor issue. Assigned to AI-Engineer. Delegating to @developer agent -- small, single-file refactor.
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Triage: P1 Resilience. Delegating to @developer. Small refactor to use a shared DB connection pool.

**Triage**: P1 Resilience. Delegating to @developer. Small refactor to use a shared DB connection pool.
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Owner

Status: Already Implemented. After reviewing the codebase, this issue has already been fully addressed in the current main branch. Closing as completed.

**Status: Already Implemented.** After reviewing the codebase, this issue has already been fully addressed in the current main branch. Closing as completed.
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Reference: leeworks-agents/SPARC#597