zookeeper 0.8.0

A minimal ZooKeeper client
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
138
139
140
141
142
143
144
145
146

use zookeeper::{AddWatchMode, Acl, CreateMode, WatcherType};
use zookeeper::{WatchedEvent, ZooKeeper, ZooKeeperExt};

use ZkCluster;

use env_logger;
use std::sync::mpsc;
use std::time::Duration;

#[test]
fn persistent_watch_receives_more_than_one_message_on_modifications() {
    let _ = env_logger::try_init();

    // Create a test cluster
    let cluster = ZkCluster::start(1);

    let zk_watcher = ZooKeeper::connect(
        &cluster.connect_string,
        Duration::from_secs(30),
        |event: WatchedEvent| info!("{:?}", event),
    )
    .unwrap();

    let zk_modifier = ZooKeeper::connect(
        &cluster.connect_string,
        Duration::from_secs(30),
        |event: WatchedEvent| info!("{:?}", event),
    )
    .unwrap();

    zk_modifier.ensure_path("/base").unwrap();

    let (snd, rcv) = mpsc::channel::<()>();
    zk_watcher.add_watch("/base", AddWatchMode::Persistent, move |_| {
        snd.send(()).unwrap();
    }).unwrap();
    zk_modifier.set_data("/base", b"hello1".to_vec(), None).unwrap();
    rcv.recv_timeout(Duration::from_millis(100)).unwrap();
    zk_modifier.set_data("/base", b"hello2".to_vec(), None).unwrap();
    rcv.recv_timeout(Duration::from_millis(100)).unwrap();
}

#[test]
fn persistent_watch_does_not_receive_children_changes() {
    let _ = env_logger::try_init();

    // Create a test cluster
    let cluster = ZkCluster::start(1);

    let zk_watcher = ZooKeeper::connect(
        &cluster.connect_string,
        Duration::from_secs(30),
        |event: WatchedEvent| info!("{:?}", event),
    )
    .unwrap();

    let zk_modifier = ZooKeeper::connect(
        &cluster.connect_string,
        Duration::from_secs(30),
        |event: WatchedEvent| info!("{:?}", event),
    )
    .unwrap();

    zk_modifier.ensure_path("/base").unwrap();
    zk_modifier.ensure_path("/base/child").unwrap();

    let (snd, rcv) = mpsc::channel::<()>();
    zk_watcher.add_watch("/base", AddWatchMode::Persistent, move |_| {
        snd.send(()).unwrap();
    }).unwrap();
    zk_modifier.set_data("/base", b"hello1".to_vec(), None).unwrap();
    rcv.recv_timeout(Duration::from_millis(100)).unwrap();
    zk_modifier.set_data("/base/child", b"hello2".to_vec(), None).unwrap();
    if rcv.recv_timeout(Duration::from_millis(100)).is_ok() {
        panic!("received unexpected event for child");
    }
}

#[test]
fn persistent_recursive_watch_stops_receiving_updates_when_removed() {
    let _ = env_logger::try_init();

    // Create a test cluster
    let cluster = ZkCluster::start(1);

    let zk_watcher = ZooKeeper::connect(
        &cluster.connect_string,
        Duration::from_secs(30),
        |event: WatchedEvent| info!("{:?}", event),
    )
    .unwrap();

    let zk_modifier = ZooKeeper::connect(
        &cluster.connect_string,
        Duration::from_secs(30),
        |event: WatchedEvent| info!("{:?}", event),
    )
    .unwrap();

    zk_modifier.ensure_path("/base").unwrap();

    let (snd, rcv) = mpsc::channel::<()>();
    zk_watcher.add_watch("/base", AddWatchMode::PersistentRecursive, move |_| {
        snd.send(()).unwrap();
    }).unwrap();
    zk_modifier.create("/base/child1", b"hello2".to_vec(), Acl::open_unsafe().clone(), CreateMode::Persistent).unwrap();
    rcv.recv_timeout(Duration::from_millis(100)).unwrap();
    zk_watcher.remove_watches("/base", WatcherType::Any).unwrap();
    zk_modifier.create("/base/child2", b"hello2".to_vec(), Acl::open_unsafe().clone(), CreateMode::Persistent).unwrap();
    if rcv.recv_timeout(Duration::from_millis(100)).is_ok() {
        panic!("received unexpected event for child");
    }
}

#[test]
fn persistent_recursive_watch_receive_children_changes() {
    let _ = env_logger::try_init();

    // Create a test cluster
    let cluster = ZkCluster::start(1);

    let zk_watcher = ZooKeeper::connect(
        &cluster.connect_string,
        Duration::from_secs(30),
        |event: WatchedEvent| info!("{:?}", event),
    )
    .unwrap();

    let zk_modifier = ZooKeeper::connect(
        &cluster.connect_string,
        Duration::from_secs(30),
        |event: WatchedEvent| info!("{:?}", event),
    )
    .unwrap();

    zk_modifier.ensure_path("/base").unwrap();

    let (snd, rcv) = mpsc::channel::<()>();
    zk_watcher.add_watch("/base", AddWatchMode::PersistentRecursive, move |_| {
        snd.send(()).unwrap();
    }).unwrap();
    zk_modifier.create("/base/child1", b"hello2".to_vec(), Acl::open_unsafe().clone(), CreateMode::Persistent).unwrap();
    rcv.recv_timeout(Duration::from_millis(100)).unwrap();
    zk_modifier.create("/base/child2", b"hello2".to_vec(), Acl::open_unsafe().clone(), CreateMode::Persistent).unwrap();
    rcv.recv_timeout(Duration::from_millis(100)).unwrap();
}