celery/celery/exceptions.py

"""

Common Exceptions

"""

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


class SystemTerminate(SystemExit):
    pass


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


class TimeLimitExceeded(Exception):
    """The time limit has been exceeded and the job has been terminated."""
    pass


class SoftTimeLimitExceeded(Exception):
    """The soft time limit has been exceeded. This exception is raised
    to give the task a chance to clean up."""
    pass


class WorkerLostError(Exception):
    """The worker processing a job has exited prematurely."""
    pass


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


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

    def __init__(self, message, *args, **kwargs):
        message = UNREGISTERED_FMT % str(message)
        KeyError.__init__(self, message, *args, **kwargs)


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


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


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


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    """The task has been revoked, so no result available."""
    pass


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