engram-cache 0.1.0

An asynchronous, multi-tier cache backed by Moka and SQLite
Documentation 
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use thiserror::Error;

/// Failures returned by Engram operations.
#[derive(Debug, Error)]
pub enum Error {
    #[error("failed to serialize cached value: {0}")]
    Serialize(#[source] bincode::Error),
    #[error("failed to deserialize cached value: {0}")]
    Deserialize(#[source] bincode::Error),
    #[error("SQLite operation failed: {0}")]
    Sqlite(#[from] sqlx::Error),
    #[error("Zstandard operation failed: {0}")]
    Compression(#[source] std::io::Error),
    #[error("cached value for key `{key}` has type `{actual}`, not requested type `{requested}`")]
    TypeMismatch {
        key: String,
        requested: String,
        actual: String,
    },
    #[error("background compression task failed: {0}")]
    BackgroundTask(#[from] tokio::task::JoinError),
}

pub type Result<T> = std::result::Result<T, Error>;