Mike Bayer 5132237f8d ensure event handlers called for all do_ping ...

The support for pool ping listeners to receive exception events via the
:meth:`.ConnectionEvents.handle_error` event added in 2.0.0b1 for
🎫`5648` failed to take into account dialect-specific ping routines
such as that of MySQL and PostgreSQL. The dialect feature has been reworked
so that all dialects participate within event handling.   Additionally,
a new boolean element :attr:`.ExceptionContext.is_pre_ping` is added
which identifies if this operation is occurring within the pre-ping
operation.

For this release, third party dialects which implement a custom
:meth:`_engine.Dialect.do_ping` method can opt in to the newly improved
behavior by having their method no longer catch exceptions or check
exceptions for "is_disconnect", instead just propagating all exceptions
outwards. Checking the exception for "is_disconnect" is now done by an
enclosing method on the default dialect, which ensures that the event hook
is invoked for all exception scenarios before testing the exception as a
"disconnect" exception. If an existing ``do_ping()`` method continues to
catch exceptions and check "is_disconnect", it will continue to work as it
did previously, but ``handle_error`` hooks will not have access to the
exception if it isn't propagated outwards.

Fixes: #5648
Change-Id: I6535d5cb389e1a761aad8c37cfeb332c548b876d

2023-03-04 11:00:48 -05:00

..

__init__.py

…

test_ddlevents.py

Revert automatic set of sequence start to 1

2022-10-17 15:36:25 -04:00

test_deprecations.py

ensure pool.reset event always called for reset

2022-10-30 15:43:19 -04:00

test_execute.py

Try running pyupgrade on the code

2022-11-16 23:03:04 +01:00

test_logging.py

Rewrite positional handling, test for "numeric"

2022-12-05 09:59:01 -05:00

test_parseconnect.py

Tighten password security by removing URL.__str__

2022-09-23 17:27:30 -04:00

test_pool.py

do not return asyncio connections to the pool under gc

2023-02-06 16:09:33 -05:00

test_processors.py

use .fromisoformat() for sqlite datetime, date, time parsing

2022-04-03 14:47:52 -04:00

test_reconnect.py

ensure event handlers called for all do_ping

2023-03-04 11:00:48 -05:00

test_reflection.py

disallow same-named columns, unchecked replacement in Table

2022-12-04 10:45:35 -05:00

test_transaction.py

do not return asyncio connections to the pool under gc

2023-02-06 16:09:33 -05:00