example/
example.rs

1use std::error::Error;
2use std::thread;
3use std::time::Duration;
4
5use redsync::{RedisInstance, Redsync, RedsyncError};
6
7fn main() {
8    if let Err(err) = run() {
9        println!("{}", err);
10    }
11}
12
13fn run() -> Result<(), Box<dyn Error>> {
14    let dlm = Redsync::new(vec![
15        RedisInstance::new("redis://127.0.0.1:6389")?,
16        RedisInstance::new("redis://127.0.0.1:6399")?,
17        RedisInstance::new("redis://127.0.0.1:6379")?,
18    ]);
19
20    let lock1 = dlm
21        .lock("resource", Duration::from_secs(1))
22        .map_err(|err| format!("Failed to acquire lock on resource: {}", err))?;
23    println!("[t = 0] Acquired 1st lock for 1 second!");
24
25    println!("[t = 0] Sleeping for 1 second!");
26    thread::sleep(Duration::from_secs(1));
27
28    let lock2 = dlm
29        .lock("resource", Duration::from_secs(2))
30        .map_err(|err| format!("Failed to acquire lock on resource: {}", err))?;
31    println!("[t = 1] Acquired 2nd lock for 2 seconds!");
32
33    println!("[t = 1] Sleeping for 1 second!");
34    thread::sleep(Duration::from_secs(1));
35
36    match dlm.unlock(&lock1) {
37        Ok(()) => println!("[t = 2] Released 1st lock after 2 seconds!"),
38        Err(RedsyncError::UnlockFailed(err)) => {
39            if err.includes(RedsyncError::InvalidLease) {
40                println!("[t = 2] Failed to release 1st lock. Lock has expired!")
41            }
42        }
43        Err(err) => println!("[t = 2] Unexpected error: {}", err),
44    };
45
46    dlm.extend(&lock2, Duration::from_secs(2))
47        .map_err(|err| format!("Failed to extend lock on resource: {}", err))?;
48    println!("[t = 2] Extended 2nd lock for 2 seconds!");
49
50    println!("[t = 2] Sleeping for 1 second!");
51    thread::sleep(Duration::from_secs(1));
52
53    dlm.unlock(&lock2)
54        .map_err(|err| format!("Failed to release lock on resource: {}", err))?;
55    println!("[t = 3] Released 2nd lock after 1 second!");
56
57    Ok(())
58}
example/example.rs

example/
example.rs
