load-balancer 0.4.5

Asynchronous load balancing utilities for Rust — including threshold, interval, limit, random, and simple strategies.
Documentation 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65

# load-balancer


A set of asynchronous load balancers for Rust, supporting multiple strategies:

- **Threshold** — limit retries based on failure count.
- **Limit** — restrict per-node usage per interval.
- **Random** — randomly choose entries.
- **Simple** — round-robin sequential allocator.
- **Interval** — allocate resources on timed intervals.
- **Proxy** — maintain a proxy connection pool.

## Examples


```rust
#[tokio::main]

async fn main() {
    // Each node can be used at most 2 times, interval 1 second
    let lb = LimitLoadBalancer::new(vec![(2, "node 1"), (2, "node 2")]);
    let start = tokio::time::Instant::now();

    for _ in 0..8 {
        let node = lb.alloc().await;

        println!("{}s Allocated node: {}", start.elapsed().as_secs(), node);
    }

    println!("------------------------------");

    // Each node can be used at most 4 times, interval 5 second
    let lb = LimitLoadBalancer::new_interval(
        vec![(3, "node 1"), (1, "node 2")],
        Duration::from_secs(5),
    );

    let start = tokio::time::Instant::now();

    for _ in 0..8 {
        let node = lb.alloc().await;

        println!("{}s Allocated node: {}", start.elapsed().as_secs(), node);
    }
}
```

### Output


```
0s Allocated node: node 1
0s Allocated node: node 1
0s Allocated node: node 2
0s Allocated node: node 2
1s Allocated node: node 1
1s Allocated node: node 1     
1s Allocated node: node 2     
1s Allocated node: node 2     
------------------------------
0s Allocated node: node 1     
0s Allocated node: node 1     
0s Allocated node: node 1     
0s Allocated node: node 2     
5s Allocated node: node 1
5s Allocated node: node 1
5s Allocated node: node 1
5s Allocated node: node 2
```