aboutsummaryrefslogtreecommitdiff
path: root/src/util/error.rs
blob: 626958dab2d94e66313539be80a49c56091ee402 (plain) (blame)
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
//! Module containing error types used in Garage
use std::fmt;
use std::io;

use err_derive::Error;

use serde::{de::Visitor, Deserialize, Deserializer, Serialize, Serializer};

use crate::data::*;

/// Regroup all Garage errors
#[derive(Debug, Error)]
pub enum Error {
	#[error(display = "IO error: {}", _0)]
	Io(#[error(source)] io::Error),

	#[error(display = "Hyper error: {}", _0)]
	Hyper(#[error(source)] hyper::Error),

	#[error(display = "HTTP error: {}", _0)]
	Http(#[error(source)] http::Error),

	#[error(display = "Invalid HTTP header value: {}", _0)]
	HttpHeader(#[error(source)] http::header::ToStrError),

	#[error(display = "Netapp error: {}", _0)]
	Netapp(#[error(source)] netapp::error::Error),

	#[error(display = "Sled error: {}", _0)]
	Sled(#[error(source)] sled::Error),

	#[error(display = "Messagepack encode error: {}", _0)]
	RmpEncode(#[error(source)] rmp_serde::encode::Error),
	#[error(display = "Messagepack decode error: {}", _0)]
	RmpDecode(#[error(source)] rmp_serde::decode::Error),
	#[error(display = "JSON error: {}", _0)]
	Json(#[error(source)] serde_json::error::Error),
	#[error(display = "TOML decode error: {}", _0)]
	TomlDecode(#[error(source)] toml::de::Error),

	#[error(display = "Tokio join error: {}", _0)]
	TokioJoin(#[error(source)] tokio::task::JoinError),

	#[error(display = "Remote error: {}", _0)]
	RemoteError(String),

	#[error(display = "Timeout")]
	Timeout,

	#[error(
		display = "Could not reach quorum of {}. {} of {} request succeeded, others returned errors: {:?}",
		_0,
		_1,
		_2,
		_3
	)]
	Quorum(usize, usize, usize, Vec<String>),

	#[error(display = "Bad RPC: {}", _0)]
	BadRpc(String),

	#[error(display = "Corrupt data: does not match hash {:?}", _0)]
	CorruptData(Hash),

	#[error(display = "{}", _0)]
	Message(String),
}

impl From<sled::transaction::TransactionError<Error>> for Error {
	fn from(e: sled::transaction::TransactionError<Error>) -> Error {
		match e {
			sled::transaction::TransactionError::Abort(x) => x,
			sled::transaction::TransactionError::Storage(x) => Error::Sled(x),
		}
	}
}

impl<T> From<tokio::sync::watch::error::SendError<T>> for Error {
	fn from(_e: tokio::sync::watch::error::SendError<T>) -> Error {
		Error::Message("Watch send error".to_string())
	}
}

impl<T> From<tokio::sync::mpsc::error::SendError<T>> for Error {
	fn from(_e: tokio::sync::mpsc::error::SendError<T>) -> Error {
		Error::Message("MPSC send error".to_string())
	}
}

impl<'a> From<&'a str> for Error {
	fn from(v: &'a str) -> Error {
		Error::Message(v.to_string())
	}
}

impl From<String> for Error {
	fn from(v: String) -> Error {
		Error::Message(v)
	}
}

pub trait ErrorContext<T, E> {
	fn err_context<C: std::borrow::Borrow<str>>(self, ctx: C) -> Result<T, Error>;
}

impl<T, E> ErrorContext<T, E> for Result<T, E>
where
	E: std::fmt::Display,
{
	#[inline]
	fn err_context<C: std::borrow::Borrow<str>>(self, ctx: C) -> Result<T, Error> {
		match self {
			Ok(x) => Ok(x),
			Err(e) => Err(Error::Message(format!("{}\n{}", ctx.borrow(), e))),
		}
	}
}

// Custom serialization for our error type, for use in RPC.
// Errors are serialized as a string of their Display representation.
// Upon deserialization, they all become a RemoteError with the
// given representation.

impl Serialize for Error {
	fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
	where
		S: Serializer,
	{
		serializer.serialize_str(&format!("{}", self))
	}
}

impl<'de> Deserialize<'de> for Error {
	fn deserialize<D>(deserializer: D) -> Result<Self, D::Error>
	where
		D: Deserializer<'de>,
	{
		deserializer.deserialize_string(ErrorVisitor)
	}
}

struct ErrorVisitor;

impl<'de> Visitor<'de> for ErrorVisitor {
	type Value = Error;

	fn expecting(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
		write!(formatter, "a string that represents an error value")
	}

	fn visit_str<E>(self, error_msg: &str) -> Result<Self::Value, E> {
		Ok(Error::RemoteError(error_msg.to_string()))
	}

	fn visit_string<E>(self, error_msg: String) -> Result<Self::Value, E> {
		Ok(Error::RemoteError(error_msg))
	}
}