rs-store 3.0.0

Redux Store for Rust
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
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137

use std::sync::{Arc, Mutex};
use std::thread;

use rs_store::{DispatchOp, StoreBuilder};
use rs_store::{Reducer, Subscriber};

#[derive(Debug, Clone)]
enum CalcAction {
    Add(i32),
    Subtract(i32),
}

struct CalcReducer {}

impl Default for CalcReducer {
    fn default() -> CalcReducer {
        CalcReducer {}
    }
}

#[derive(Debug, Clone)]
struct CalcState {
    count: i32,
}

impl Default for CalcState {
    fn default() -> CalcState {
        CalcState { count: 0 }
    }
}

impl Reducer<CalcState, CalcAction> for CalcReducer {
    fn reduce(&self, state: &CalcState, action: &CalcAction) -> DispatchOp<CalcState, CalcAction> {
        match action {
            CalcAction::Add(i) => {
                println!("CalcReducer::reduce: + {}", i);
                DispatchOp::Dispatch(
                    CalcState {
                        count: state.count + i,
                    },
                    vec![],
                )
            }
            CalcAction::Subtract(i) => {
                println!("CalcReducer::reduce: - {}", i);
                DispatchOp::Dispatch(
                    CalcState {
                        count: state.count - i,
                    },
                    vec![],
                )
            }
        }
    }
}

struct CalcSubscriber {
    id: i32,
    last: Mutex<CalcState>,
}

impl Default for CalcSubscriber {
    fn default() -> CalcSubscriber {
        CalcSubscriber {
            id: 0,
            last: Mutex::new(CalcState::default()),
        }
    }
}

impl CalcSubscriber {
    fn new(id: i32) -> CalcSubscriber {
        CalcSubscriber {
            id,
            last: Mutex::new(CalcState::default()),
        }
    }
}

impl Subscriber<CalcState, CalcAction> for CalcSubscriber {
    fn on_notify(&self, state: &CalcState, action: &CalcAction) {
        match action {
            CalcAction::Add(_i) => {
                println!(
                    "CalcSubscriber::on_notify: id:{}, state: {:?} <- last: {:?} + action: {:?}",
                    self.id,
                    state,
                    self.last.lock().unwrap(),
                    action,
                );
            }
            CalcAction::Subtract(_i) => {
                println!(
                    "CalcSubscriber::on_notify: id:{}, state: {:?} <- last: {:?} + action: {:?}",
                    self.id,
                    state,
                    self.last.lock().unwrap(),
                    action,
                );
            }
        }

        *self.last.lock().unwrap() = state.clone();
    }
}

pub fn main() {
    println!("Hello, Concurrent!");

    let store =
        StoreBuilder::new_with_reducer(CalcState::default(), Box::new(CalcReducer::default()))
            .with_name("store-concurrent".into())
            .build()
            .unwrap();

    println!("add subscriber");
    store.add_subscriber(Arc::new(CalcSubscriber::default())).unwrap();
    let _ = store.dispatch(CalcAction::Add(1));

    let store_clone = store.clone();
    thread::spawn(move || {
        thread::sleep(std::time::Duration::from_secs(1));

        println!("add more subscriber");
        store_clone.add_subscriber(Arc::new(CalcSubscriber::new(1))).unwrap();
        let _ = store_clone.dispatch(CalcAction::Subtract(1));
    })
    .join()
    .unwrap();

    match store.stop() {
        Ok(_) => println!("store stopped"),
        Err(e) => {
            panic!("store stop failed  : {:?}", e);
        }
    }
}