cesiumdb 0.1.0

Blazing fast, persistent key-value store for Rust
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use std::ops::Bound;

use bytes::Bytes;
use cesiumdb::{
    keypair::{
        DEFAULT_NS,
        KeyBytes,
        ValueBytes,
    },
    memtable::Memtable,
};

#[test]
fn test_memtable_multiple_versions() {
    let memtable = Memtable::new(0, 64 * 1024 * 1024);

    memtable
        .put(
            KeyBytes::new(DEFAULT_NS, Bytes::from("testkey"), 1),
            ValueBytes::new(DEFAULT_NS, Bytes::from("value1")),
        )
        .unwrap();
    memtable
        .put(
            KeyBytes::new(DEFAULT_NS, Bytes::from("testkey"), 2),
            ValueBytes::new(DEFAULT_NS, Bytes::from("value2")),
        )
        .unwrap();
    memtable
        .put(
            KeyBytes::new(DEFAULT_NS, Bytes::from("testkey"), 3),
            ValueBytes::new(DEFAULT_NS, Bytes::from("value3")),
        )
        .unwrap();

    let mut count = 0;
    for (k, v) in memtable.scan(Bound::Unbounded, Bound::Unbounded) {
        println!(
            "Entry {}: key={:?}, ts={}, value={:?}",
            count,
            String::from_utf8_lossy(k.as_ref()),
            k.ts(),
            String::from_utf8_lossy(v.as_bytes().as_ref())
        );
        count += 1;
    }
    println!("Total entries: {}", count);

    let got = memtable.get(&KeyBytes::new(DEFAULT_NS, Bytes::from("testkey"), 0));
    if let Some(v) = got {
        println!(
            "Direct get: {:?}",
            String::from_utf8_lossy(v.as_bytes().as_ref())
        );
    } else {
        println!("Direct get: None");
    }
}