celery/celery/exceptions.py

# -*- coding: utf-8 -*-
"""
    celery.exceptions
    ~~~~~~~~~~~~~~~~~

    This module contains all exceptions used by the Celery API.

"""
from __future__ import absolute_import

from billiard.exceptions import (  # noqa
    SoftTimeLimitExceeded, TimeLimitExceeded, WorkerLostError,
)

UNREGISTERED_FMT = """\
Task of kind %s is not registered, please make sure it's imported.\
"""


class SecurityError(Exception):
    """Security related exceptions.

    Handle with care.

    """


class SystemTerminate(SystemExit):
    """Signals that the worker should terminate."""


class QueueNotFound(KeyError):
    """Task routed to a queue not in CELERY_QUEUES."""


class ImproperlyConfigured(ImportError):
    """Celery is somehow improperly configured."""


class NotRegistered(KeyError):
    """The task is not registered."""

    def __repr__(self):
        return UNREGISTERED_FMT % str(self)


class AlreadyRegistered(Exception):
    """The task is already registered."""


class TimeoutError(Exception):
    """The operation timed out."""


class MaxRetriesExceededError(Exception):
    """The tasks max restart limit has been exceeded."""


class RetryTaskError(Exception):
    """The task is to be retried later."""

    def __init__(self, message, exc, *args, **kwargs):
        self.exc = exc
        Exception.__init__(self, message, exc, *args, **kwargs)


class TaskRevokedError(Exception):
    """The task has been revoked, so no result available."""


class NotConfigured(UserWarning):
    """Celery has not been configured, as no config module has been found."""


class AlwaysEagerIgnored(UserWarning):
    """send_task ignores CELERY_ALWAYS_EAGER option"""


class InvalidTaskError(Exception):
    """The task has invalid data or is not properly constructed."""


class CPendingDeprecationWarning(PendingDeprecationWarning):
    pass


class CDeprecationWarning(DeprecationWarning):
    pass


class IncompleteStream(Exception):
    """Found the end of a stream of data, but the data is not yet complete."""