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
147
148
149
150
151
152
153
154
155
156
157
158
159
160
use std::{
cmp::PartialEq,
error::Error as StdError,
fmt::{self, Display},
io,
};
use crate::{
pagecache::{DiskPtr, PageView},
IVec,
};
pub type Result<T> = std::result::Result<T, Error>;
pub(crate) type CasResult<'a, R> =
std::result::Result<PageView<'a>, Option<(PageView<'a>, R)>>;
#[derive(Debug)]
pub enum Error {
CollectionNotFound(IVec),
Unsupported(String),
ReportableBug(String),
Io(io::Error),
Corruption {
at: DiskPtr,
},
#[doc(hidden)]
#[cfg(feature = "failpoints")]
FailPoint,
}
impl Clone for Error {
fn clone(&self) -> Self {
use self::Error::*;
match self {
Io(ioe) => Io(io::Error::new(ioe.kind(), format!("{:?}", ioe))),
CollectionNotFound(name) => CollectionNotFound(name.clone()),
Unsupported(why) => Unsupported(why.clone()),
ReportableBug(what) => ReportableBug(what.clone()),
Corruption { at } => Corruption { at: *at },
#[cfg(feature = "failpoints")]
FailPoint => FailPoint,
}
}
}
impl Eq for Error {}
impl PartialEq for Error {
fn eq(&self, other: &Self) -> bool {
use self::Error::*;
match *self {
CollectionNotFound(ref l) => {
if let CollectionNotFound(ref r) = *other {
l == r
} else {
false
}
}
Unsupported(ref l) => {
if let Unsupported(ref r) = *other {
l == r
} else {
false
}
}
ReportableBug(ref l) => {
if let ReportableBug(ref r) = *other {
l == r
} else {
false
}
}
#[cfg(feature = "failpoints")]
FailPoint => {
if let FailPoint = *other {
true
} else {
false
}
}
Corruption { at: l } => {
if let Corruption { at: r } = *other {
l == r
} else {
false
}
}
Io(_) => false,
}
}
}
impl From<io::Error> for Error {
#[inline]
fn from(io_error: io::Error) -> Self {
Error::Io(io_error)
}
}
impl StdError for Error {
fn description(&self) -> &str {
use self::Error::*;
match *self {
CollectionNotFound(_) => "Collection does not exist.",
Unsupported(ref e) | ReportableBug(ref e) => &*e,
#[cfg(feature = "failpoints")]
FailPoint => "Fail point has been triggered.",
Io(ref e) => e.description(),
Corruption { .. } => "Read corrupted data.",
}
}
}
impl Display for Error {
fn fmt(
&self,
f: &mut fmt::Formatter<'_>,
) -> std::result::Result<(), fmt::Error> {
use self::Error::*;
match *self {
CollectionNotFound(ref name) => {
write!(f, "Collection {:?} does not exist", name,)
}
Unsupported(ref e) => write!(f, "Unsupported: {}", e),
ReportableBug(ref e) => write!(
f,
"Unexpected bug has happened: {}. \
PLEASE REPORT THIS BUG!",
e
),
#[cfg(feature = "failpoints")]
FailPoint => write!(f, "Fail point has been triggered."),
Io(ref e) => write!(f, "IO error: {}", e),
Corruption { at } => {
write!(f, "Read corrupted data at file offset {}", at)
}
}
}
}