Struct MemStorage 

pub struct MemStorage { /* private fields */ }

In-memory blob store. Cheap to clone via Arc.

Implementations

impl MemStorage

pub fn new() -> Self

Trait Implementations

impl Default for MemStorage

fn default() -> MemStorage

Returns the “default value” for a type.

impl StorageBackend for MemStorage

fn get<'life0, 'life1, 'async_trait>( &'life0 self, key: &'life1 str, ) -> Pin<Box<dyn Future<Output = Result<Option<Vec<u8>>>> + Send + 'async_trait>>

where Self: 'async_trait, 'life0: 'async_trait, 'life1: 'async_trait,

Fetch an object by key. Returns Ok(None) if the key doesn’t exist.

fn put<'life0, 'life1, 'life2, 'async_trait>( &'life0 self, key: &'life1 str, data: &'life2 [u8], ) -> Pin<Box<dyn Future<Output = Result<()>> + Send + 'async_trait>>

where Self: 'async_trait, 'life0: 'async_trait, 'life1: 'async_trait, 'life2: 'async_trait,

Write an object. Overwrites if the key exists.

fn delete<'life0, 'life1, 'async_trait>( &'life0 self, key: &'life1 str, ) -> Pin<Box<dyn Future<Output = Result<()>> + Send + 'async_trait>>

where Self: 'async_trait, 'life0: 'async_trait, 'life1: 'async_trait,

Delete an object. Missing keys are not an error.

fn list<'life0, 'life1, 'life2, 'async_trait>( &'life0 self, prefix: &'life1 str, after: Option<&'life2 str>, ) -> Pin<Box<dyn Future<Output = Result<Vec<String>>> + Send + 'async_trait>>

where Self: 'async_trait, 'life0: 'async_trait, 'life1: 'async_trait, 'life2: 'async_trait,

List object keys with a given prefix.

fn exists<'life0, 'life1, 'async_trait>( &'life0 self, key: &'life1 str, ) -> Pin<Box<dyn Future<Output = Result<bool>> + Send + 'async_trait>>

where Self: 'async_trait, 'life0: 'async_trait, 'life1: 'async_trait,

Check whether an object exists. Cheaper than a full get for backends that support HEAD requests.

fn put_if_absent<'life0, 'life1, 'life2, 'async_trait>( &'life0 self, key: &'life1 str, data: &'life2 [u8], ) -> Pin<Box<dyn Future<Output = Result<CasResult>> + Send + 'async_trait>>

where Self: 'async_trait, 'life0: 'async_trait, 'life1: 'async_trait, 'life2: 'async_trait,

Write iff the key does not exist.

fn put_if_match<'life0, 'life1, 'life2, 'life3, 'async_trait>( &'life0 self, key: &'life1 str, data: &'life2 [u8], etag: &'life3 str, ) -> Pin<Box<dyn Future<Output = Result<CasResult>> + Send + 'async_trait>>

where Self: 'async_trait, 'life0: 'async_trait, 'life1: 'async_trait, 'life2: 'async_trait, 'life3: 'async_trait,

Write iff the current etag matches.

fn range_get<'life0, 'life1, 'async_trait>( &'life0 self, key: &'life1 str, start: u64, len: u32, ) -> Pin<Box<dyn Future<Output = Result<Option<Vec<u8>>>> + Send + 'async_trait>>

where Self: 'async_trait, 'life0: 'async_trait, 'life1: 'async_trait,

Byte-range GET. Default implementation fetches the full object and slices. Override when the backend supports Range headers (S3, HTTP).

fn backend_name(&self) -> &str

Short human-readable identifier for this backend. Used in logs.

fn delete_many<'life0, 'life1, 'async_trait>( &'life0 self, keys: &'life1 [String], ) -> Pin<Box<dyn Future<Output = Result<usize, Error>> + Send + 'async_trait>>

where 'life0: 'async_trait, 'life1: 'async_trait, Self: 'async_trait,

Batch delete. Default is serial delete calls; override for backends with native batch primitives (S3 DeleteObjects, HTTP bulk endpoints).

fn put_many<'life0, 'life1, 'async_trait>( &'life0 self, entries: &'life1 [(String, Vec<u8>)], ) -> Pin<Box<dyn Future<Output = Result<(), Error>> + Send + 'async_trait>>

where 'life0: 'async_trait, 'life1: 'async_trait, Self: 'async_trait,

Batch put. Default is serial put calls; override for backends with parallelism (HTTP with concurrent uploads, S3 with multipart).