Trait DataStore

pub trait DataStore:
    PinStore
    + Debug
    + Send
    + Sync {
    // Required methods
    fn init<'life0, 'async_trait>(
        &'life0 self,
    ) -> Pin<Box<dyn Future<Output = Result<(), Error>> + Send + 'async_trait>>
       where Self: 'async_trait,
             'life0: 'async_trait;
    fn contains<'life0, 'life1, 'async_trait>(
        &'life0 self,
        key: &'life1 [u8],
    ) -> Pin<Box<dyn Future<Output = Result<bool, Error>> + Send + 'async_trait>>
       where Self: 'async_trait,
             'life0: 'async_trait,
             'life1: 'async_trait;
    fn get<'life0, 'life1, 'async_trait>(
        &'life0 self,
        key: &'life1 [u8],
    ) -> Pin<Box<dyn Future<Output = Result<Option<Vec<u8>>, Error>> + Send + 'async_trait>>
       where Self: 'async_trait,
             'life0: 'async_trait,
             'life1: 'async_trait;
    fn put<'life0, 'life1, 'life2, 'async_trait>(
        &'life0 self,
        key: &'life1 [u8],
        value: &'life2 [u8],
    ) -> Pin<Box<dyn Future<Output = Result<(), Error>> + Send + 'async_trait>>
       where Self: 'async_trait,
             'life0: 'async_trait,
             'life1: 'async_trait,
             'life2: 'async_trait;
    fn remove<'life0, 'life1, 'async_trait>(
        &'life0 self,
        key: &'life1 [u8],
    ) -> Pin<Box<dyn Future<Output = Result<(), Error>> + Send + 'async_trait>>
       where Self: 'async_trait,
             'life0: 'async_trait,
             'life1: 'async_trait;
    fn iter<'life0, 'async_trait>(
        &'life0 self,
    ) -> Pin<Box<dyn Future<Output = BoxStream<'static, (Vec<u8>, Vec<u8>)>> + Send + 'async_trait>>
       where Self: 'async_trait,
             'life0: 'async_trait;

    // Provided method
    fn open<'life0, 'async_trait>(
        &'life0 self,
    ) -> Pin<Box<dyn Future<Output = Result<(), Error>> + Send + 'async_trait>>
       where Self: 'async_trait,
             'life0: 'async_trait { ... }
}

Generic layer of abstraction for a key-value data store.

Required Methods

fn init<'life0, 'async_trait>( &'life0 self, ) -> Pin<Box<dyn Future<Output = Result<(), Error>> + Send + 'async_trait>>

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

fn contains<'life0, 'life1, 'async_trait>( &'life0 self, key: &'life1 [u8], ) -> Pin<Box<dyn Future<Output = Result<bool, Error>> + Send + 'async_trait>>

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

Checks if a key is present in the datastore.

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

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

Returns the value associated with a key from the datastore.

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

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

Puts the value under the key in the datastore.

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

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

Removes a key-value pair from the datastore.

fn iter<'life0, 'async_trait>( &'life0 self, ) -> Pin<Box<dyn Future<Output = BoxStream<'static, (Vec<u8>, Vec<u8>)>> + Send + 'async_trait>>

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

Iterate over the k/v of the datastore

Provided Methods

fn open<'life0, 'async_trait>( &'life0 self, ) -> Pin<Box<dyn Future<Output = Result<(), Error>> + Send + 'async_trait>>

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

👎Deprecated

Implementors

impl DataStore for FsDataStore

The column operations are all unimplemented pending at least downscoping of the DataStore trait itself.

impl DataStore for MemDataStore