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refactor(persistence): introduce ThreadMetaStore ABC for backend-agnostic thread metadata

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Add ThreadMetaStore abstract base class with create/get/search/update/delete
interface. ThreadMetaRepository (SQL) now inherits from it. New
MemoryThreadMetaStore wraps LangGraph BaseStore for memory-mode deployments.

deps.py now always provides a non-None thread_meta_repo, eliminating all
`if thread_meta_repo is not None` guards in services.py, worker.py, and
routers/threads.py. search_threads no longer needs a Store fallback branch.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
This commit is contained in:
rayhpeng
2026-04-06 17:45:41 +08:00
parent 51c68db376
commit 29547c0ee4
7 changed files with 203 additions and 78 deletions
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backend/app/gateway/services.py
+13 -14
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@@ -296,20 +296,19 @@ async def start_run(
if run_ctx.store is not None:
await _upsert_thread_in_store(run_ctx.store, thread_id, body.metadata)
# Upsert thread metadata in the SQL-backed threads_meta table
if run_ctx.thread_meta_repo is not None:
try:
existing = await run_ctx.thread_meta_repo.get(thread_id)
if existing is None:
await run_ctx.thread_meta_repo.create(
thread_id,
assistant_id=body.assistant_id,
metadata=body.metadata,
)
else:
await run_ctx.thread_meta_repo.update_status(thread_id, "running")
except Exception:
logger.warning("Failed to upsert thread_meta for %s (non-fatal)", sanitize_log_param(thread_id))
# Upsert thread metadata so the thread appears in /threads/search
try:
existing = await run_ctx.thread_meta_repo.get(thread_id)
if existing is None:
await run_ctx.thread_meta_repo.create(
thread_id,
assistant_id=body.assistant_id,
metadata=body.metadata,
)
else:
await run_ctx.thread_meta_repo.update_status(thread_id, "running")
except Exception:
logger.warning("Failed to upsert thread_meta for %s (non-fatal)", sanitize_log_param(thread_id))
agent_factory = resolve_agent_factory(body.assistant_id)
graph_input = normalize_input(body.input)