custom-storage-adapter

name	custom-storage-adapter
description	Implement a custom @eleven-labs/nest-profiler storage backend (Redis, a database, S3…) by implementing IProfilerStorageAdapter and wiring it via the `storage` option. Use when the built-in memory / file / sqlite backends don't fit — e.g. profiles must be shared across instances, survive deploys, or live in existing infrastructure.

Write a custom storage adapter

The core ships three backends: memory (default), file, and sqlite (via @eleven-labs/nest-profiler/sqlite). Reach for a custom adapter when profiles must live elsewhere — Redis, Postgres/Mongo, S3 — typically to share profiles across instances, or to persist where the local disk does not (ephemeral/serverless filesystems, or across a redeploy that wipes the volume). Note: file and sqlite already survive a plain process restart on a box with a persistent disk — a custom adapter is only warranted when there is no such disk or the store must be shared/remote. Confirm the core is set up first (setup-nest-profiler).

The contract — IProfilerStorageAdapter

Required methods: save(profile), findAll(options?), findOne(token), clear().

Important optionals:

• crossProcess (boolean) — set true for shared stores (Redis, DB, file). The commander/CLI profiler uses it to warn when command profiles land in a process-local store where the web UI can't see them. Omitted means "assume shared".
• query(query) — run the dashboard's structured list query (section + filters + sort + pagination) natively so a list render never loads every profile. Implement this for any store that can filter/paginate efficiently. When omitted, the service falls back to findAll + in-memory filtering (correct, not scalable).
• distinct(field, typeIn?) — distinct summary values for dynamic filter select options; falls back to deriving from findAll.
• setIndexAttributesProvider(provider) — called once at startup before the first save; needed if you persist a ProfileSummary for native query/distinct (to populate kind-specific summary.attributes).
• close() — release handles on shutdown (DB connection, file locks). Implement it for any native handle.

Wire it via the storage option

storage takes precedence over storageType. Build the adapter (usually async, from ConfigService) and pass the instance:

ProfilerModule.forRootAsync({
  isGlobal: true,
  inject: [ConfigService],
  useFactory: (config: ConfigService) => ({
    storage: new RedisStorageAdapter({
      url: config.get('redis.url'),
      ttl: config.get('profiler.ttl'),
    }),
  }),
});

Mirror the built-in SqliteStorageAdapter (in the core's /sqlite subpath) for shape, and FileStorageAdapter / MemoryStorageAdapter (both exported from @eleven-labs/nest-profiler) for the in-memory query fallback logic you may want to reuse.

Verify

• Boot the app, make a few requests, and confirm profiles appear at /_profiler and survive a restart (persistent stores).
• Confirm the list page filters/paginates (exercise your query/distinct or the fallback).
• Confirm close() runs on shutdown without leaking a handle.

Docs: https://nest-profiler.eleven-labs.com/docs/packages/nest-profiler/storage