mentat/tolstoy/src/errors.rs

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// Copyright 2018 Mozilla
//
// Licensed under the Apache License, Version 2.0 (the "License"); you may not use
// this file except in compliance with the License. You may obtain a copy of the
// License at http://www.apache.org/licenses/LICENSE-2.0
// Unless required by applicable law or agreed to in writing, software distributed
// under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR
// CONDITIONS OF ANY KIND, either express or implied. See the License for the
// specific language governing permissions and limitations under the License.
use std;
use rusqlite;
use uuid;
use hyper;
use serde_json;
use mentat_db;
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#[macro_export]
macro_rules! bail {
($e:expr) => (
return Err($e.into());
)
}
pub type Result<T> = ::std::result::Result<T, TolstoyError>;
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#[derive(Debug, Fail)]
pub enum TolstoyError {
#[fail(display = "Received bad response from the server: {}", _0)]
BadServerResponse(String),
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#[fail(display = "encountered more than one metadata value for key: {}", _0)]
DuplicateMetadata(String),
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#[fail(display = "transaction processor didn't say it was done")]
TxProcessorUnfinished,
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#[fail(display = "expected one, found {} uuid mappings for tx", _0)]
TxIncorrectlyMapped(usize),
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#[fail(display = "encountered unexpected state: {}", _0)]
UnexpectedState(String),
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#[fail(display = "not yet implemented: {}", _0)]
NotYetImplemented(String),
#[fail(display = "{}", _0)]
DbError(#[cause] mentat_db::DbError),
#[fail(display = "{}", _0)]
SerializationError(#[cause] serde_json::Error),
// It would be better to capture the underlying `rusqlite::Error`, but that type doesn't
// implement many useful traits, including `Clone`, `Eq`, and `PartialEq`.
#[fail(display = "SQL error: _0")]
RusqliteError(String),
#[fail(display = "{}", _0)]
IoError(#[cause] std::io::Error),
#[fail(display = "{}", _0)]
UuidError(#[cause] uuid::ParseError),
#[fail(display = "{}", _0)]
NetworkError(#[cause] hyper::Error),
#[fail(display = "{}", _0)]
UriError(#[cause] hyper::error::UriError),
}
impl From<mentat_db::DbError> for TolstoyError {
fn from(error: mentat_db::DbError) -> TolstoyError {
TolstoyError::DbError(error)
}
}
impl From<serde_json::Error> for TolstoyError {
fn from(error: serde_json::Error) -> TolstoyError {
TolstoyError::SerializationError(error)
}
}
impl From<rusqlite::Error> for TolstoyError {
fn from(error: rusqlite::Error) -> TolstoyError {
TolstoyError::RusqliteError(error.to_string())
}
}
impl From<std::io::Error> for TolstoyError {
fn from(error: std::io::Error) -> TolstoyError {
TolstoyError::IoError(error)
}
}
impl From<uuid::ParseError> for TolstoyError {
fn from(error: uuid::ParseError) -> TolstoyError {
TolstoyError::UuidError(error)
}
}
impl From<hyper::Error> for TolstoyError {
fn from(error: hyper::Error) -> TolstoyError {
TolstoyError::NetworkError(error)
}
}
impl From<hyper::error::UriError> for TolstoyError {
fn from(error: hyper::error::UriError) -> TolstoyError {
TolstoyError::UriError(error)
}
}