Quickstart
SlateDB is a Rust library. It doesn't currently ship with any language bindings, so you must use Rust or generate your own bindings.
Installation
Add the following to your Cargo.toml
to use SlateDB:
[dependencies]
slatedb = "*"
tokio = "*"
Usage
SlateDB uses tokio
as its async runtime and object_store
to interact with object storage. The code below shows a simple in-memory example.
use slatedb::{Db, SlateDBError};
use slatedb::object_store::{ObjectStore, memory::InMemory};
use std::sync::Arc;
#[tokio::main]
async fn main() -> Result<(), SlateDBError> {
// Setup
let object_store: Arc<dyn ObjectStore> = Arc::new(InMemory::new());
let kv_store = Db::open("/tmp/test_kv_store", object_store).await?;
// Put
let key = b"test_key";
let value = b"test_value";
kv_store.put(key, value).await?;
// Get
assert_eq!(
kv_store.get(key).await?,
Some("test_value".into())
);
// Delete
kv_store.delete(key).await?;
assert!(kv_store.get(key).await?.is_none());
kv_store.put(b"test_key1", b"test_value1").await?;
kv_store.put(b"test_key2", b"test_value2").await?;
kv_store.put(b"test_key3", b"test_value3").await?;
kv_store.put(b"test_key4", b"test_value4").await?;
// Scan over unbound range
let mut iter = kv_store.scan::<Vec<u8>, _>(..).await?;
let mut count = 1;
while let Ok(Some(item)) = iter.next().await {
assert_eq!(
item.key,
format!("test_key{count}").into_bytes()
);
assert_eq!(
item.value,
format!("test_value{count}").into_bytes()
);
count += 1;
}
// Scan over bound range
let mut iter = kv_store.scan("test_key1"..="test_key2").await?;
assert_eq!(
iter.next().await?,
Some((b"test_key1", b"test_value1").into())
);
assert_eq!(
iter.next().await?,
Some((b"test_key2", b"test_value2").into())
);
// Seek ahead to next key
let mut iter = kv_store.scan::<Vec<u8>, _>(..).await?;
let next_key = b"test_key4";
iter.seek(next_key).await?;
assert_eq!(
iter.next().await?,
Some((b"test_key4", b"test_value4").into())
);
assert_eq!(iter.next().await?, None);
// Close
kv_store.close().await?;
Ok(())
}