another-rxrust 0.0.46

A different implementation than `rxRust` for easier use of `ReactiveX` in `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
138
139
140
141
142
143
144

use crate::internals::{function_wrapper::*, stream_controller::*};
use crate::prelude::*;
use scheduler::IScheduler;
use std::marker::PhantomData;

#[derive(Clone)]
pub struct ObserveOn<'a, Scheduler, Item>
where
  Scheduler: IScheduler<'a> + Clone + Send + Sync,
  Item: Clone + Send + Sync,
{
  scheduler_ctor: FunctionWrapper<'a, (), Scheduler>,
  _item: PhantomData<Item>,
  _lifetime: PhantomData<&'a ()>,
}

impl<'a, Scheduler, Item> ObserveOn<'a, Scheduler, Item>
where
  Scheduler: IScheduler<'a> + Clone + Send + Sync,
  Item: Clone + Send + Sync,
{
  pub fn new<SchedulerCreator>(
    scheduler_ctor: SchedulerCreator,
  ) -> ObserveOn<'a, Scheduler, Item>
  where
    SchedulerCreator: Fn() -> Scheduler + Send + Sync + 'a,
  {
    ObserveOn {
      scheduler_ctor: FunctionWrapper::new(move |_| scheduler_ctor()),
      _item: PhantomData,
      _lifetime: PhantomData,
    }
  }

  pub fn execute(&self, source: Observable<'a, Item>) -> Observable<'a, Item> {
    let scheduler_ctor = self.scheduler_ctor.clone();
    Observable::create(move |s| {
      let scheduler = scheduler_ctor.call(());

      let sctl = StreamController::new(s);

      let sctl_next = sctl.clone();
      let sctl_error = sctl.clone();
      let sctl_complete = sctl.clone();

      let source_next = source.clone();

      let scheduler_next = scheduler.clone();
      let scheduler_error = scheduler.clone();
      let scheduler_complete = scheduler.clone();

      let scheduler_on_finalize = scheduler.clone();
      sctl.set_on_finalize(move || {
        scheduler_on_finalize.abort();
      });

      source_next.inner_subscribe(sctl.new_observer(
        move |_, x: Item| {
          let sctl_next = sctl_next.clone();
          scheduler_next.post(move || {
            sctl_next.sink_next(x.clone());
          });
        },
        move |_, e| {
          let sctl_error = sctl_error.clone();
          scheduler_error.post(move || {
            sctl_error.sink_error(e.clone());
          });
        },
        move |serial| {
          let sctl_complete = sctl_complete.clone();
          scheduler_complete.post(move || {
            sctl_complete.sink_complete(&serial);
          });
        },
      ));
    })
  }
}

impl<'a, Item> Observable<'a, Item>
where
  Item: Clone + Send + Sync,
{
  pub fn observe_on<Scheduler, SchedulerCreator>(
    &self,
    scheduler_ctor: SchedulerCreator,
  ) -> Observable<'a, Item>
  where
    Scheduler: IScheduler<'a> + Clone + Send + Sync + 'a,
    SchedulerCreator: Fn() -> Scheduler + Send + Sync + 'a,
  {
    ObserveOn::new(scheduler_ctor).execute(self.clone())
  }
}

#[cfg(all(test, not(feature = "web")))]
mod test {
  use crate::prelude::*;
  use std::{thread, time};

  #[test]
  fn basic() {
    let o = Observable::create(|s| {
      for n in 0..5 {
        s.next(n);
        thread::sleep(time::Duration::from_millis(100));
      }
      s.complete();
    });

    o.observe_on(schedulers::new_thread_scheduler()).subscribe(
      print_next_fmt!("{}"),
      print_error!(),
      print_complete!(),
    );
    thread::sleep(time::Duration::from_millis(1000));
  }

  #[test]
  fn multiple() {
    let o = Observable::create(|s| {
      for n in 0..5 {
        s.next(n);
        thread::sleep(time::Duration::from_millis(100));
      }
      s.complete();
    })
    .observe_on(schedulers::new_thread_scheduler());

    o.subscribe(
      |x| println!("#1 next {}", x),
      |e| println!("#1 error {:?}", e),
      || println!("#1 complete"),
    );

    o.subscribe(
      |x| println!("#2 next {}", x),
      |e| println!("#2 error {:?}", e),
      || println!("#2 complete"),
    );
    thread::sleep(time::Duration::from_millis(1000));
  }
}