wal-rs

This is an write-ahead-log implementation.

Usage

1. Add this lib as a dependency [dependencies] wal-rs = "1"

2. Add the crate reference extern crate wal_rs;

Example

``` extern crate rand; extern crate wal_rs;

use rand::{threadrng, Rng}; use std::fs; use walrs::*;

fn main() { let cfg = Config { entrypersegment: 100, check_crc32: false, };

let mut wal = WAL::open("./testdir", cfg).unwrap();

let entry_num: usize = 1024;
let mut buf = vec![0; entry_num];
thread_rng().fill(&mut buf[..]);

for i in 0..buf.len() {
    wal.write(&buf[..i + 1]).unwrap();
}

assert_eq!(wal.len(), entry_num);

let data = wal.read(entry_num * 2).unwrap();
assert_eq!(data.len(), entry_num);
assert_eq!(wal.len(), 0);
for (i, v) in data.iter().enumerate() {
    assert_eq!((i + 1) as usize, v.len());
    assert_eq!(&buf[..(i + 1) as usize].to_vec(), v);
}

fs::remove_dir_all("./testdir").unwrap();

}

```