txmap 2.1.0

A concurrent transactional hash map for Rust with fine-grained locking, internal mutability and composable transactions
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

use crate::{
    prelude::*,
    tests::{creators::*, data::*, types::*},
};

#[test]
fn remove_multiple_keys() {
    let map = map_alice_bob_chuck(1, 2, 3);
    let tx = map
        .prepared_tx(&RemoveMultiple::SCHEMA)
        .remove(RemoveMultiple::a, |entry, _params, state| {
            state.user.push(entry.map(|e| e.0))
        })
        .remove(RemoveMultiple::b, |entry, _params, state| {
            state.user.push(entry.map(|e| e.0))
        })
        .into_transaction();
    assert_eq!(
        tx.execute(
            RemoveMultipleKeys {
                a: ALICE.into(),
                b: BOB.into(),
            },
            RemoveMultipleParams {},
        ),
        TxResult::Completed(RemoveMultipleState {
            user: vec![Some(ALICE.into()), Some(BOB.into())],
        })
    );
    assert_eq!(map.len(), 1);
}

#[test]
fn remove_where_conditionally() {
    let map = map_alice_bob(1, 2);
    let tx = map
        .prepared_tx(&RemoveMultiple::SCHEMA)
        .remove_where(RemoveMultiple::a, |k, v, _p, s| {
            let cond = *v >= 2;
            if cond {
                s.user.push(Some(k.clone()));
            } else {
                s.user.push(None);
            }
            cond
        })
        .remove_where(RemoveMultiple::b, |k, v, _p, s| {
            let cond = *v >= 2;
            if cond {
                s.user.push(Some(k.clone()));
            } else {
                s.user.push(None);
            }
            cond
        })
        .into_transaction();
    assert_eq!(
        tx.execute(
            RemoveMultipleKeys {
                a: ALICE.into(),
                b: BOB.into()
            },
            RemoveMultipleParams {}
        ),
        TxResult::Completed(RemoveMultipleState {
            user: vec![None, Some(BOB.into())]
        })
    );
    assert_eq!(map.len(), 1);
}