Celery

=============

- Adds support for ``exchange_bind`` and ``exchange_unbind``.

Contributed by Rumyana Neykova

- Fixed bugs in funtests and demo scripts.

Contributed by Rumyana Neykova

.. _version-0.9.3:

=============

- Fixed bug that could cause the consumer to crash when reading
large message payloads asynchronously.

- Serialization error messages now include the invalid value.

.. _version-0.9.2:

=============

- Consumer cancel notification support was broken (Issue 1)

Fix contributed by Andrew Grangaard

.. _version-0.9.1:

=============

- Supports draining events from multiple channels (``Connection.drain_events``)
- Support for timeouts
- Support for heartbeats
- ``Connection.heartbeat_tick(rate=2)`` must called at regular intervals
(half of the heartbeat value if rate is 2).
- Or some other scheme by using ``Connection.send_heartbeat``.
- Supports RabbitMQ extensions:
- Consumer Cancel Notifications
- by default a cancel results in ``ChannelError`` being raised
- but not if a ``on_cancel`` callback is passed to ``basic_consume``.
- Publisher confirms
- ``Channel.confirm_select()`` enables publisher confirms.
- ``Channel.events['basic_ack'].append(my_callback)`` adds a callback
to be called when a message is confirmed. This callback is then
called with the signature ``(delivery_tag, multiple)``.
- Support for ``basic_return``
- Uses AMQP 0-9-1 instead of 0-8.
- ``Channel.access_request`` and ``ticket`` arguments to methods
**removed**.
- Supports the ``arguments`` argument to ``basic_consume``.
- ``internal`` argument to ``exchange_declare`` removed.
- ``auto_delete`` argument to ``exchange_declare`` deprecated
- ``insist`` argument to ``Connection`` removed.
- ``Channel.alerts`` has been removed.
- Support for ``Channel.basic_recover_async``.
- ``Channel.basic_recover`` deprecated.
- Exceptions renamed to have idiomatic names:
- ``AMQPException`` -> ``AMQPError``
- ``AMQPConnectionException`` -> ConnectionError``
- ``AMQPChannelException`` -> ChannelError``
- ``Connection.known_hosts`` removed.
- ``Connection`` no longer supports redirects.
- ``exchange`` argument to ``queue_bind`` can now be empty
to use the "default exchange".
- Adds ``Connection.is_alive`` that tries to detect
whether the connection can still be used.
- Adds ``Connection.connection_errors`` and ``.channel_errors``,
a list of recoverable errors.
- Exposes the underlying socket as ``Connection.sock``.
- Adds ``Channel.no_ack_consumers`` to keep track of consumer tags
that set the no_ack flag.
- Slightly better at error recovery


Changes
=======

.. _version-5.1.0:

Added

- Added a `MockBroker` for internal testing.
- Added more tests to the `app` module.
- Added a `prelude` module.
- Added support for YAML, MsgPack, and Pickle content types, behind the `extra_content_types` feature flag.

Changed

- Improved `TaskResultExt`. Now takes a `FnOnce() -> Context` instead of `&str`.

Fixed

- Ensure a `Signature` inherits default `TaskOptions` from the corresponding `Task` and `Celery` or `Beat` app.
- Cleaned up remaining uses of `.unwrap()` in the library.
- Options returned with `Task::options()` now have the current values, where app-level values are overridden by task-level values.

Added

- Added a `.display_pretty()` method on the `Celery` struct that prints out a cool ASCII logo
with some useful information about the app.
- Added an `AsyncResult` struct that acts as a handler for task results.
- Added `Task::retry_with_countdown` and `Task::retry_with_eta` trait methods so that tasks can
manually trigger a retry.

Changed

- Fields of the `Signature` struct made private to avoid confusion around which fields of `TaskOptions` apply to a `Signature`.
- `Celery::send_task` now returns an `AsyncResult` instead of a `String` for the `Ok` variant.
- Renamed `DummyBackend` to `LocalSchedulerBackend`.
- Switched to [`thiserror`](https://github.com/dtolnay/thiserror) for the error module instead of the deprecated `failure` crate.

Fixed

- Fixed bug where `hard_time_limit` was ignored by worker if only specified at the app or task level.