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use amq_protocol::{
frame::GenError,
protocol::AMQPClass,
};
use failure::{Backtrace, Context, Fail};
use std::{fmt, io};
use crate::connection_status::ConnectionState;
#[derive(Debug)]
pub struct Error {
inner: Context<ErrorKind>,
}
#[derive(Debug, Fail)]
pub enum ErrorKind {
#[fail(display = "invalid protocol method: {:?}", _0)]
InvalidMethod(AMQPClass),
#[fail(display = "invalid channel: {}", _0)]
InvalidChannel(u16),
#[fail(display = "connection refused")]
ConnectionRefused,
#[fail(display = "not connected")]
NotConnected,
#[fail(display = "unexpected reply")]
UnexpectedReply,
#[fail(display = "precondition failed")]
PreconditionFailed,
#[fail(display = "The maximum number of channels for this connection has been reached")]
ChannelLimitReached,
#[fail(display = "invalid connection state: {:?}", _0)]
InvalidConnectionState(ConnectionState),
#[fail(display = "Failed to parse: {}", _0)]
ParsingError(String),
#[fail(display = "Failed to serialise: {:?}", _0)]
SerialisationError(#[fail(cause)] GenError),
#[fail(display = "IO error: {:?}", _0)]
IOError(#[fail(cause)] io::Error),
#[fail(display = "IO loop error")]
IoLoopError,
#[doc(hidden)]
#[fail(display = "lapin::error::ErrorKind::__Nonexhaustive: this should not be printed")]
__Nonexhaustive,
}
impl Error {
pub fn kind(&self) -> &ErrorKind {
self.inner.get_context()
}
}
impl Fail for Error {
fn cause(&self) -> Option<&dyn Fail> {
self.inner.cause()
}
fn backtrace(&self) -> Option<&Backtrace> {
self.inner.backtrace()
}
}
impl fmt::Display for Error {
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
fmt::Display::fmt(&self.inner, f)
}
}
impl From<ErrorKind> for Error {
fn from(kind: ErrorKind) -> Error {
Error { inner: Context::new(kind) }
}
}
impl From<Context<ErrorKind>> for Error {
fn from(inner: Context<ErrorKind>) -> Error {
Error { inner }
}
}