forked from Deuxfleurs/garage
158 lines
4 KiB
Rust
158 lines
4 KiB
Rust
//! Module containing error types used in Garage
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use std::fmt;
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use std::io;
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use err_derive::Error;
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use serde::{de::Visitor, Deserialize, Deserializer, Serialize, Serializer};
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use crate::data::*;
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/// Regroup all Garage errors
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#[derive(Debug, Error)]
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pub enum Error {
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#[error(display = "IO error: {}", _0)]
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Io(#[error(source)] io::Error),
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#[error(display = "Hyper error: {}", _0)]
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Hyper(#[error(source)] hyper::Error),
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#[error(display = "HTTP error: {}", _0)]
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Http(#[error(source)] http::Error),
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#[error(display = "Invalid HTTP header value: {}", _0)]
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HttpHeader(#[error(source)] http::header::ToStrError),
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#[error(display = "Netapp error: {}", _0)]
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Netapp(#[error(source)] netapp::error::Error),
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#[error(display = "Sled error: {}", _0)]
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Sled(#[error(source)] sled::Error),
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#[error(display = "Messagepack encode error: {}", _0)]
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RmpEncode(#[error(source)] rmp_serde::encode::Error),
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#[error(display = "Messagepack decode error: {}", _0)]
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RmpDecode(#[error(source)] rmp_serde::decode::Error),
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#[error(display = "JSON error: {}", _0)]
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Json(#[error(source)] serde_json::error::Error),
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#[error(display = "TOML decode error: {}", _0)]
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TomlDecode(#[error(source)] toml::de::Error),
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#[error(display = "Tokio join error: {}", _0)]
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TokioJoin(#[error(source)] tokio::task::JoinError),
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#[error(display = "Remote error: {}", _0)]
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RemoteError(String),
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#[error(display = "Timeout")]
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Timeout,
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#[error(
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display = "Could not reach quorum of {}. {} of {} request succeeded, others returned errors: {:?}",
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_0,
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_1,
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_2,
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_3
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)]
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Quorum(usize, usize, usize, Vec<String>),
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#[error(display = "Bad RPC: {}", _0)]
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BadRpc(String),
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#[error(display = "Corrupt data: does not match hash {:?}", _0)]
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CorruptData(Hash),
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#[error(display = "{}", _0)]
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Message(String),
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}
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impl From<sled::transaction::TransactionError<Error>> for Error {
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fn from(e: sled::transaction::TransactionError<Error>) -> Error {
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match e {
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sled::transaction::TransactionError::Abort(x) => x,
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sled::transaction::TransactionError::Storage(x) => Error::Sled(x),
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}
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}
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}
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impl<T> From<tokio::sync::watch::error::SendError<T>> for Error {
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fn from(_e: tokio::sync::watch::error::SendError<T>) -> Error {
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Error::Message("Watch send error".to_string())
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}
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}
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impl<T> From<tokio::sync::mpsc::error::SendError<T>> for Error {
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fn from(_e: tokio::sync::mpsc::error::SendError<T>) -> Error {
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Error::Message("MPSC send error".to_string())
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}
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}
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impl<'a> From<&'a str> for Error {
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fn from(v: &'a str) -> Error {
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Error::Message(v.to_string())
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}
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}
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impl From<String> for Error {
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fn from(v: String) -> Error {
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Error::Message(v)
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}
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}
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pub trait ErrorContext<T, E> {
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fn err_context<C: std::borrow::Borrow<str>>(self, ctx: C) -> Result<T, Error>;
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}
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impl<T, E> ErrorContext<T, E> for Result<T, E>
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where
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E: std::fmt::Display,
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{
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#[inline]
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fn err_context<C: std::borrow::Borrow<str>>(self, ctx: C) -> Result<T, Error> {
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match self {
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Ok(x) => Ok(x),
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Err(e) => Err(Error::Message(format!("{}\n{}", ctx.borrow(), e))),
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}
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}
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}
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// Custom serialization for our error type, for use in RPC.
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// Errors are serialized as a string of their Display representation.
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// Upon deserialization, they all become a RemoteError with the
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// given representation.
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impl Serialize for Error {
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fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
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where
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S: Serializer,
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{
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serializer.serialize_str(&format!("{}", self))
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}
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}
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impl<'de> Deserialize<'de> for Error {
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fn deserialize<D>(deserializer: D) -> Result<Self, D::Error>
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where
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D: Deserializer<'de>,
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{
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deserializer.deserialize_string(ErrorVisitor)
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}
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}
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struct ErrorVisitor;
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impl<'de> Visitor<'de> for ErrorVisitor {
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type Value = Error;
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fn expecting(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
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write!(formatter, "a string that represents an error value")
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}
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fn visit_str<E>(self, error_msg: &str) -> Result<Self::Value, E> {
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Ok(Error::RemoteError(error_msg.to_string()))
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}
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fn visit_string<E>(self, error_msg: String) -> Result<Self::Value, E> {
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Ok(Error::RemoteError(error_msg))
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}
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}
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