2 releases
0.1.1 | Aug 15, 2023 |
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0.1.0 | Aug 14, 2023 |
#229 in Caching
13KB
222 lines
CrudeCache
CrudeCache
is a simple utility for good enough concurrent caching needs. Inspired by Play Framework's cache.getOrElseUpdate.
//Returns non-expired cached item. If one does not exist, new item will be cached & returned
cache.get_or_else_update("cache_key", Duration::from_secs(60), async_function).await
Disclaimer: Please note that CrudeCache
was developed for personal projects, it is not battle-tested in production and might contain bugs. Feedback, suggestions, and contributions are more than welcome.
Features
- Expiration of cached items are evaluated lazily.
- To minimize contention points, items are stored in a
ShardedMap
, which splits the data across multiple shards (HashMaps
). No bells and whistles, and no resharding. - Each shard is behind
tokio::sync::RwLock
Installation
Add this to your Cargo.toml
:
[dependencies]
crude_cache = "0.1.1"
Example usage
use crude_cache::CrudeCache;
#[derive(Clone)]
pub struct DataService {
cache: Arc<CrudeCache>,
db: Arc<Db>
}
impl DataService {
pub async fn get_big_data(&self) -> SomeBigType {
self.cache.get_or_else_update("big_data", Duration::from_secs(60), || self.db.big_data()).await
}
pub async fn get_other_data(&self) -> OtherType {
self.cache.get_or_else_update("other_data", Duration::from_secs(60), || self.db.other_data()).await
}
}
Similar Crates
More sophisticated alternative:
Dependencies
~2.3–8MB
~64K SLoC