# Copyright 2021 The NATS Authors # 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. # from __future__ import annotations import asyncio from typing import TYPE_CHECKING if TYPE_CHECKING: from nats.aio.subscription import Subscription class Error(Exception): pass class TimeoutError(Error, asyncio.TimeoutError): def __str__(self) -> str: return "nats: timeout" class NoRespondersError(Error): def __str__(self) -> str: return "nats: no responders available for request" class StaleConnectionError(Error): def __str__(self) -> str: return "nats: stale connection" class OutboundBufferLimitError(Error): def __str__(self) -> str: return "nats: outbound buffer limit exceeded" class UnexpectedEOF(StaleConnectionError): def __str__(self) -> str: return "nats: unexpected EOF" class FlushTimeoutError(TimeoutError): def __str__(self) -> str: return "nats: flush timeout" class ConnectionClosedError(Error): def __str__(self) -> str: return "nats: connection closed" class SecureConnRequiredError(Error): def __str__(self) -> str: return "nats: secure connection required" class SecureConnWantedError(Error): def __str__(self) -> str: return "nats: secure connection not available" class SecureConnFailedError(Error): def __str__(self) -> str: return "nats: secure connection failed" class BadSubscriptionError(Error): def __str__(self) -> str: return "nats: invalid subscription" class BadSubjectError(Error): def __str__(self) -> str: return "nats: invalid subject" class SlowConsumerError(Error): def __init__(self, subject: str, reply: str, sid: int, sub: Subscription) -> None: self.subject = subject self.reply = reply self.sid = sid self.sub = sub def __str__(self) -> str: return f"nats: slow consumer, messages dropped subject: {self.subject}, sid: {self.sid}, sub: {self.sub}" class BadTimeoutError(Error): def __str__(self) -> str: return "nats: timeout invalid" class AuthorizationError(Error): def __str__(self) -> str: return "nats: authorization failed" class NoServersError(Error): def __str__(self) -> str: return "nats: no servers available for connection" class JsonParseError(Error): def __str__(self) -> str: return "nats: connect message, json parse err" class MaxPayloadError(Error): def __str__(self) -> str: return "nats: maximum payload exceeded" class DrainTimeoutError(TimeoutError): def __str__(self) -> str: return "nats: draining connection timed out" class ConnectionDrainingError(Error): def __str__(self) -> str: return "nats: connection draining" class ConnectionReconnectingError(Error): def __str__(self) -> str: return "nats: connection reconnecting" class InvalidUserCredentialsError(Error): def __str__(self) -> str: return "nats: invalid user credentials" class InvalidCallbackTypeError(Error): def __str__(self) -> str: return "nats: callbacks must be coroutine functions" class ProtocolError(Error): def __str__(self) -> str: return "nats: protocol error" class ServerNotInPoolError(Error): def __str__(self) -> str: return "nats: selected server is not in the pool" class NotJSMessageError(Error): """ When it is attempted to use an API meant for JetStream on a message that does not belong to a stream. """ def __str__(self) -> str: return "nats: not a JetStream message" class MsgAlreadyAckdError(Error): def __init__(self, msg=None) -> None: self._msg = msg def __str__(self) -> str: return f"nats: message was already acknowledged: {self._msg}"