A fully typed LMDB wrapper with minimum overhead, uses zerocopy internally.
This library is able to serialize all kind of types, not just bytes slices, even Serde types are supported.
fs::create_dir_all("target/zerocopy.mdb")?;
let env = EnvOpenOptions::new().open("target/zerocopy.mdb")?;
// we will open the default unamed database
let db: Database<Str, OwnedType<i32>> = env.create_database(None)?;
// opening a write transaction
let mut wtxn = env.write_txn()?;
db.put(&mut wtxn, "seven", &7)?;
db.put(&mut wtxn, "zero", &0)?;
db.put(&mut wtxn, "five", &5)?;
db.put(&mut wtxn, "three", &3)?;
wtxn.commit()?;
// opening a read transaction
// to check if those values are now available
let mut rtxn = env.read_txn()?;
let ret = db.get(&rtxn, "zero")?;
assert_eq!(ret, Some(0));
let ret = db.get(&rtxn, "five")?;
assert_eq!(ret, Some(5));Yo want to see more about all the possibilities? Go check out the example.
I am currently not sure about the library name, so, I did not published a version on crates.io. To be able to see the documentation you will need to have a nightly rust version, clone the repository and generate the documentation by yourself.
git clone https://github.com/Kerollmops/heed.git
cd heed
# rustup override set nighlty
cargo doc --open