ntex-error 2.2.0

ntex error management
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

use std::{any::Any, any::TypeId, error, fmt, sync::Arc};

use crate::{Backtrace, Error, ErrorDiagnostic, repr::ErrorRepr};

trait ErrorInformation: fmt::Display + fmt::Debug + 'static {
    fn tag(&self) -> Option<&crate::Bytes>;

    fn service(&self) -> Option<&'static str>;

    fn signature(&self) -> &'static str;

    fn backtrace(&self) -> Option<&Backtrace>;

    fn source(&self) -> Option<&(dyn error::Error + 'static)>;

    fn get_item(&self, id: &TypeId) -> Option<&(dyn Any + Send + Sync)>;
}

impl<E> ErrorInformation for ErrorRepr<E>
where
    E: ErrorDiagnostic + error::Error,
{
    fn tag(&self) -> Option<&crate::Bytes> {
        ErrorDiagnostic::tag(self)
    }

    fn service(&self) -> Option<&'static str> {
        ErrorDiagnostic::service(self)
    }

    fn signature(&self) -> &'static str {
        self.error.signature()
    }

    fn backtrace(&self) -> Option<&Backtrace> {
        ErrorDiagnostic::backtrace(self)
    }

    fn source(&self) -> Option<&(dyn error::Error + 'static)> {
        self.error.source()
    }

    fn get_item(&self, id: &TypeId) -> Option<&(dyn Any + Send + Sync)> {
        self.ext.map.get(id).map(AsRef::as_ref)
    }
}

/// Type-erased container holding error information.
///
/// This allows storing and passing error metadata without exposing the concrete type.
#[derive(Clone)]
pub struct ErrorInfo {
    inner: Arc<dyn ErrorInformation>,
}

impl ErrorInfo {
    /// Returns an optional tag associated with this error.
    pub fn tag(&self) -> Option<&crate::Bytes> {
        self.inner.tag()
    }

    /// Returns the name of the responsible service, if applicable.
    pub fn service(&self) -> Option<&'static str> {
        self.inner.service()
    }

    /// Returns a stable identifier for the specific error classification.
    pub fn signature(&self) -> &'static str {
        self.inner.signature()
    }

    /// Returns a backtrace for debugging purposes, if available.
    pub fn backtrace(&self) -> Option<&Backtrace> {
        self.inner.backtrace()
    }

    /// Returns a reference to a previously stored value of type `T` from this error.
    pub fn get_item<T: 'static>(&self) -> Option<&T> {
        self.inner
            .get_item(&TypeId::of::<T>())
            .and_then(|boxed| boxed.downcast_ref())
    }
}

impl<E> From<Error<E>> for ErrorInfo
where
    E: ErrorDiagnostic + error::Error,
{
    fn from(err: Error<E>) -> Self {
        Self { inner: err.inner }
    }
}

impl<E> From<&Error<E>> for ErrorInfo
where
    E: ErrorDiagnostic + error::Error,
{
    fn from(err: &Error<E>) -> Self {
        Self {
            inner: err.inner.clone(),
        }
    }
}

impl error::Error for ErrorInfo {
    fn source(&self) -> Option<&(dyn error::Error + 'static)> {
        self.inner.source()
    }
}

impl fmt::Debug for ErrorInfo {
    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
        fmt::Debug::fmt(&self.inner, f)
    }
}

impl fmt::Display for ErrorInfo {
    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
        fmt::Display::fmt(&self.inner, f)
    }
}

impl ErrorDiagnostic for ErrorInfo {
    fn signature(&self) -> &'static str {
        self.inner.signature()
    }

    fn service(&self) -> Option<&'static str> {
        self.inner.service()
    }

    fn backtrace(&self) -> Option<&Backtrace> {
        self.inner.backtrace()
    }
}