mm1-sup 0.7.23

An Erlang-style actor runtime 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
138
139
140
141
142

use crate::common::child_spec::ChildSpec;
mod sup_actor;
mod sup_context;

pub use sup_actor::uniform_sup;
pub use sup_context::UniformSupContext;

pub mod child_type {
    use mm1_common::types::AnyError;
    use tokio::time::Instant;

    use crate::common::factory::ActorFactory;
    use crate::common::restart_intensity::{RestartIntensity, RestartStats};

    pub trait UniformChildType<A> {
        type Data;

        fn new_data(&self, args: A) -> Self::Data;
        fn make_runnable<F>(
            &self,
            factory: &F,
            data: &mut Self::Data,
        ) -> Result<F::Runnable, AnyError>
        where
            F: ActorFactory<Args = A>;
        fn should_restart(
            &self,
            data: &mut Self::Data,
            normal_exit: bool,
        ) -> Result<bool, AnyError>;
    }

    #[derive(Debug, Clone, Copy)]
    pub struct Temporary;

    pub type Permanent = Restarting<true>;

    pub type Transient = Restarting<false>;

    impl<A> UniformChildType<A> for Temporary {
        type Data = Option<A>;

        fn new_data(&self, args: A) -> Self::Data {
            Some(args)
        }

        fn make_runnable<F>(
            &self,
            factory: &F,
            data: &mut Self::Data,
        ) -> Result<F::Runnable, AnyError>
        where
            F: ActorFactory<Args = A>,
        {
            let args = data.take().ok_or_else(|| eyre::format_err!("args gone"))?;
            let runnable = factory.produce(args);
            Ok(runnable)
        }

        fn should_restart(
            &self,
            _data: &mut Self::Data,
            _normal_exit: bool,
        ) -> Result<bool, AnyError> {
            Ok(false)
        }
    }

    #[doc(hidden)]
    pub struct Restarting<const RESTART_ON_NORMAL_EXIT: bool> {
        restart_intensity: RestartIntensity,
    }

    impl<const RESTART_ON_NORMAL_EXIT: bool> Restarting<RESTART_ON_NORMAL_EXIT> {
        pub fn new(restart_intensity: RestartIntensity) -> Self {
            Self { restart_intensity }
        }
    }

    impl<const RESTART_ON_NORMAL_EXIT: bool, A> UniformChildType<A>
        for Restarting<RESTART_ON_NORMAL_EXIT>
    where
        A: Clone,
    {
        type Data = ChildData<A>;

        fn new_data(&self, args: A) -> Self::Data {
            let restarts = self.restart_intensity.new_stats();
            ChildData { args, restarts }
        }

        fn make_runnable<F>(
            &self,
            factory: &F,
            data: &mut Self::Data,
        ) -> Result<F::Runnable, AnyError>
        where
            F: ActorFactory<Args = A>,
        {
            let args = data.args.clone();
            let runnable = factory.produce(args);
            Ok(runnable)
        }

        fn should_restart(
            &self,
            data: &mut Self::Data,
            _normal_exit: bool,
        ) -> Result<bool, AnyError> {
            self.restart_intensity
                .report_exit(&mut data.restarts, Instant::now())?;
            Ok(RESTART_ON_NORMAL_EXIT)
        }
    }

    #[doc(hidden)]
    pub struct ChildData<A> {
        args:     A,
        restarts: RestartStats,
    }
}

pub struct UniformSup<F, C> {
    pub child_spec: ChildSpec<F, C>,
}

impl<F, C> UniformSup<F, C> {
    pub fn new(child_spec: ChildSpec<F, C>) -> Self {
        Self { child_spec }
    }
}

impl<F, C> Clone for UniformSup<F, C>
where
    ChildSpec<F, C>: Clone,
{
    fn clone(&self) -> Self {
        Self {
            child_spec: self.child_spec.clone(),
        }
    }
}