Replace memcached with in-memory

README.md

@@ -49,7 +49,7 @@ uvicorn valis.wsgi:app --reload
 ```
 This will start a local web server at `http://localhost:8000/valis/`.  The API documentation will be located at `http://localhost:8000/valis/docs`.  Or to see the alternate documentation, go to `http://localhost:8000/valis/redoc/`
 
-By default, the app will try to cache some route responses to a Redis database in localhost. If you don't have a Redis instance running you can use `memcached` for testing. To do so, edit `~/.config/sdss/valis.yaml` and add `cache_backend: memcached`.
+By default, the app will try to cache some route responses to a Redis database in localhost. If you don't have a Redis instance running you can use `in-memory` for testing (this caches the response directly in RAM). To do so, edit `~/.config/sdss/valis.yaml` and add `cache_backend: in-memory`.
 
 ### Database Connection
 
@@ -95,7 +95,7 @@ Additionally, you can set the environment variable `VALIS_DB_RESET=false` or add
 This section describes a variety of deployment methods.  Valis uses gunicorn as its
 wsgi http server. It binds the app both to port 8000, and a unix socket.  The default mode is to start valis with an awsgi uvicorn server, with 4 workers.
 
-Valis requires a Redis database running at the default location in `localhost:6379`.  If this is not possible, caching can be done in memory by modifying `~/.config/sdss/valis.yaml` to use `cache_backend: memcached`.
+Valis requires a Redis database running at the default location in `localhost:6379`.  If this is not possible, caching can be done in memory by modifying `~/.config/sdss/valis.yaml` to use `cache_backend: in-memory`.
 
 ### Deploying Zora + Valis together
 See the SDSS [Zora+Valis Docker](https://github.com/sdss/zora_valis_dockers) repo page.

python/valis/cache.py

@@ -37,7 +37,7 @@
     get_typed_signature
 )
 from fastapi_cache import FastAPICache
-from fastapi_cache.backends.memcached import MemcachedBackend
+from fastapi_cache.backends.inmemory import InMemoryBackend
 from fastapi_cache.backends.redis import RedisBackend
 from fastapi_cache.decorator import _augment_signature, _locate_param
 from redis.asyncio.client import Redis
@@ -71,10 +71,9 @@
 @asynccontextmanager
 async def lifespan(_: FastAPI) -> AsyncIterator[None]:
     backend = settings.cache_backend
-    if backend == 'memcached':
-        logger.info('Using Memcached backend for caching')
-        memcache_client = MemcacheClient('localhost', 11211)
-        FastAPICache.init(MemcachedBackend(memcache_client),
+    if backend == 'in-memory':
+        logger.info('Using in-memory backend for caching')
+        FastAPICache.init(InMemoryBackend(),
                           prefix="fastapi-cache",
                           key_builder=valis_cache_key_builder)
     elif backend == 'redis':

python/valis/settings.py

@@ -34,7 +34,7 @@ class EnvEnum(str, Enum):
 
 
 class CacheBackendEnum(str, Enum):
-    memcached = 'memcached'
+    inmemory = 'in-memory'
     redis = 'redis'
 
 
@@ -48,7 +48,7 @@ class Settings(BaseSettings):
     db_host: Optional[str] = 'localhost'
     db_pass: Optional[str] = None
     db_reset: bool = True
-    cache_backend: CacheBackendEnum = CacheBackendEnum.redis
+    cache_backend: CacheBackendEnum = CacheBackendEnum.inmemory
     model_config = SettingsConfigDict(env_prefix="valis_")
 
     @field_validator('allow_origin')