Trait opendal::raw::adapters::kv::Adapter

pub trait Adapter: Send + Sync + Debug + Unpin + 'static {
    // Required methods
    fn metadata(&self) -> Metadata;
    fn get(
        &self,
        path: &str
    ) -> impl Future<Output = Result<Option<Buffer>>> + MaybeSend;
    fn set(
        &self,
        path: &str,
        value: Buffer
    ) -> impl Future<Output = Result<()>> + MaybeSend;
    fn delete(&self, path: &str) -> impl Future<Output = Result<()>> + MaybeSend;

    // Provided methods
    fn blocking_get(&self, path: &str) -> Result<Option<Buffer>> { ... }
    fn blocking_set(&self, path: &str, value: Buffer) -> Result<()> { ... }
    fn blocking_delete(&self, path: &str) -> Result<()> { ... }
    fn scan(
        &self,
        path: &str
    ) -> impl Future<Output = Result<Vec<String>>> + MaybeSend { ... }
    fn blocking_scan(&self, path: &str) -> Result<Vec<String>> { ... }
    fn append(
        &self,
        path: &str,
        value: &[u8]
    ) -> impl Future<Output = Result<()>> + MaybeSend { ... }
    fn blocking_append(&self, path: &str, value: &[u8]) -> Result<()> { ... }
}

KvAdapter is the adapter to underlying kv services.

By implement this trait, any kv service can work as an OpenDAL Service.

Required Methods

fn metadata(&self) -> Metadata

Return the metadata of this key value accessor.

fn get( &self, path: &str ) -> impl Future<Output = Result<Option<Buffer>>> + MaybeSend

Get a key from service.

• return Ok(None) if this key is not exist.

fn set( &self, path: &str, value: Buffer ) -> impl Future<Output = Result<()>> + MaybeSend

Set a key into service.

fn delete(&self, path: &str) -> impl Future<Output = Result<()>> + MaybeSend

Delete a key from service.

• return Ok(()) even if this key is not exist.

Provided Methods

fn blocking_get(&self, path: &str) -> Result<Option<Buffer>>

The blocking version of get.

fn blocking_set(&self, path: &str, value: Buffer) -> Result<()>

The blocking version of set.

fn blocking_delete(&self, path: &str) -> Result<()>

Delete a key from service in blocking way.

• return Ok(()) even if this key is not exist.

fn scan( &self, path: &str ) -> impl Future<Output = Result<Vec<String>>> + MaybeSend

Scan a key prefix to get all keys that start with this key.

fn blocking_scan(&self, path: &str) -> Result<Vec<String>>

Scan a key prefix to get all keys that start with this key in blocking way.

fn append( &self, path: &str, value: &[u8] ) -> impl Future<Output = Result<()>> + MaybeSend

Append a key into service

fn blocking_append(&self, path: &str, value: &[u8]) -> Result<()>

Append a key into service in blocking way.

Object Safety

This trait is not object safe.

Implementors