zrx-scheduler 0.0.21

Scheduler for workflow execution
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

// Copyright (c) 2025-2026 Zensical and contributors

// SPDX-License-Identifier: MIT
// Third-party contributions licensed under DCO

// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to
// deal in the Software without restriction, including without limitation the
// rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
// sell copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:

// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.

// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
// IN THE SOFTWARE.

// ----------------------------------------------------------------------------

//! Step error conversions.

use crate::scheduler::signal::Value;

use super::Error;

// ----------------------------------------------------------------------------
// Traits
// ----------------------------------------------------------------------------

/// Conversion into [`Result`].
pub trait IntoResult<T = ()>: Sized {
    /// Converts into a step result.
    ///
    /// # Errors
    ///
    /// In case conversion fails, an error should be returned.
    fn into_result(self) -> Result<T, Error>;
}

// ----------------------------------------------------------------------------
// Blanket implementations
// ----------------------------------------------------------------------------

impl<T, E> IntoResult<T> for Result<T, E>
where
    T: Value,
    E: Into<anyhow::Error>,
{
    /// Converts any result into a step result.
    #[inline]
    fn into_result(self) -> Result<T, Error> {
        self.map_err(into_error)
    }
}

impl<T> IntoResult<T> for T
where
    T: Value,
{
    /// Converts any value into a step result.
    #[inline]
    fn into_result(self) -> Result<T, Error> {
        Ok(self)
    }
}

// ----------------------------------------------------------------------------
// Macros
// ----------------------------------------------------------------------------

// Implements step error conversion for concrete types.
macro_rules! impl_into_result {
    ($($T:ty),+ $(,)?) => {
        $(
            impl<E> IntoResult<$T> for Result<$T, E>
            where
                E: Into<anyhow::Error>,
            {
                #[inline]
                fn into_result(self) -> Result<$T, Error> {
                    self.map_err(into_error)
                }
            }

            impl IntoResult<$T> for $T {
                #[inline]
                fn into_result(self) -> Result<$T, Error> {
                    Ok(self)
                }
            }
        )+
    };
}

// ----------------------------------------------------------------------------

impl_into_result!(bool);

// ----------------------------------------------------------------------------
// Functions
// ----------------------------------------------------------------------------

/// Converts any error into a step error.
///
/// This implementation attempts to downcast the error into one of the known
/// variants, and falls back to the [`Error::Other`] variant which will convert
/// into [`anyhow::Error`] if the error to allow for flexible integration with
/// external error types.
fn into_error<E>(err: E) -> Error
where
    E: Into<anyhow::Error>,
{
    let mut err = err.into();

    // Implements downcast attempt of error
    macro_rules! downcast {
        ($variant:path) => {
            err = match err.downcast() {
                Ok(err) => return $variant(err),
                Err(err) => err,
            };
        };
    }

    // Downcast known error variants
    downcast!(Error::Session);
    downcast!(Error::Key);

    // Handle unknown error variants
    Error::Other(err)
}