leveldb-orm

An ORM wrapper for Rust leveldb KV APIs. Use bincode to encoder / decoder key and object.

Rust version policy

Base on rust leveldb:

leveldb is built and tested on stable releases of Rust. This are currently 1.31.0 and 1.43.1. Nightlies might not build at any point and failures are allowed. There are no known issues with nightlies, though.

Prerequisites

snappy and leveldb need to be installed. On Ubuntu, I recommend:

sudo apt-get install libleveldb-dev libsnappy-dev

Usage

The struct should impl Serialize and Deserialize, so we need serde

Derive by macros

[dependencies]
leveldb = "0.8"
leveldb-orm = { version = "0.1", features = ["macros"]}
serde = { version = "1.0", features = ["derive"] }

Then, on your main.rs:

Example

use leveldb::database::Database;
use leveldb::options::Options;
use leveldb_orm::{KVOrm, KeyOrm, LeveldbOrm};
use serde::{Deserialize, Serialize};

#[derive(LeveldbOrm, Serialize, Deserialize)]
#[leveldb_key(executable, args)]
pub struct Command {
    pub executable: u8,
    pub args: Vec<String>,
    pub current_dir: Option<String>,
}

fn main() {
    let cmd = Command {
        executable: 1,
        args: vec!["arg1".into(), "arg2".into(), "arg3".into()],
        current_dir: Some("\\dir".into()),
    };

    let mut options = Options::new();
    options.create_if_missing = true;
    let database = Database::open(std::path::Path::new("./mypath"), options).unwrap();

    cmd.put(&database).unwrap();

    let key = Command::encode_key((&cmd.executable, &cmd.args)).unwrap();
    // or `let key = cmd.key().unwrap();`
    Command::get(&database, &key).unwrap();

    Command::delete(&database, false, &key).unwrap();
}

Without macros feature

Only have to impl KeyOrm trait manually.

Test

• cargo test
• cargo test --features "macros"