viewstamped-replication 0.9.0

A Rust-based implementation of the Viewstamped Replication consensus protocol.
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

use crate::viewstamp::View;
use serde::{Deserialize, Serialize};

#[derive(Copy, Clone, Debug, Eq, PartialEq, Hash, Serialize, Deserialize)]
pub struct ClientIdentifier(u128);

impl Default for ClientIdentifier {
    fn default() -> Self {
        Self(uuid::Uuid::new_v4().as_u128())
    }
}

#[derive(
    Copy, Clone, Debug, Default, Ord, PartialOrd, Eq, PartialEq, Hash, Serialize, Deserialize,
)]
pub struct RequestIdentifier(u128);

impl RequestIdentifier {
    pub fn increment(&mut self) {
        self.0 += 1;
    }

    pub fn next(&self) -> Self {
        Self(self.0 + 1)
    }
}

#[derive(Clone, Debug, Eq, PartialEq, Serialize, Deserialize)]
pub struct Request<R> {
    /// The operation (with its arguments) the client wants to run.
    pub payload: R,
    /// Client id
    pub client: ClientIdentifier,
    /// Client-assigned number for the request.
    pub id: RequestIdentifier,
}

#[derive(Clone, Debug, Eq, PartialEq, Serialize, Deserialize)]
pub struct Reply<R> {
    /// The current view of the replica.
    pub view: View,
    /// Client-assigned number for the request.
    pub id: RequestIdentifier,
    /// The response from the service after executing the operation.
    pub payload: R,
}