Follow-up ba6490aa1e.
That patch worked around $executeContext iteration errors due to the
lack of recursion support in doUpdates()/handleUpdateQueue(). Errors
were triggered by MediaWiki::schedulePostSendJobs() enqueueing deferred
updates that invoke JobRunner::run(), which, in turn, invoke doUpdates()
for each job via JobRunner:: doExecuteJob(). The doUpdates() method was
changed to operate on the sub-queue for the in-progress DeferrableUpdate.
Further improve the recursion logic:
* Use classes for the scope stack and scope queues.
* Put *all* updates added during a DeferrableUpdate::doUpdate() call into
the subqueue, regardless of "defer until" stage or whether it implements
MergeableUpdate. Now, doUpdate() can run *everything* it enqueued instead
of a non-obvious subset. Note that the TransactionRoundDefiningUpdate
that invokes JobRunner was already a POSTSEND update before ba6490aa1eb;
the only effect of this change is that MergeableUpdate instances from jobs
will once again run in doExecuteJob().
* Make recursive DeferredUpdates::doUpdate() calls error out immediately
unless the DeferrableUpdate responsible is a TransactionRoundAwareUpdate
with the TRX_ROUND_ABSENT flag. This covers the schedulePostSendJobs()
scenario and only prohibits insane call patterns. Failing early avoids
the risk of handleUpdateQueue() dropping all the updates due to the same
DBTransactionError error in DeferredUpdates::attemptUpdate().
* Avoid recursion loop in tryOpportunisticExecute() when JobQueueDB is in
use and a large number of tasks are pending. This happened due to methods
like onTransactionPreCommitOrIdle() being used within JobQueueDB.
Mark DeferredUpdates::doUpdates()/tryOpportunisticExecute() as @internal
and create a Maintenance::shutdown() method to avoid a direct call in the
doMaintenance.php file.
Bug: T249069
Bug: T268840
Change-Id: Ib369f0e74243a48ababdb9cd83b155c9a0f5e741
For compliance with the new version of the table interface policy
(T255803).
This patch was created by an automated search & replace operation
on the includes/ directory.
Bug: T257789
Change-Id: I17e5e92e24c708ffc846945a136347670a3a20c7
Per the Stable Interface Policy, PHP interfaces should not be
directly implemented by extensions, unless they are marked to be safe
for that purpose.
Bug: T247862
Change-Id: Idd5783b70fc00c03d57f5b1a887f0e47c4d7b146
This should reduce excess contention and lock timeouts.
Previously, it used a pre-commit hook which ran just before the
end of the DB transaction round.
Also removed unused User::incEditCountImmediate() method.
Bug: T202715
Depends-on: I6d239a5ea286afb10d9e317b2ee1436de60f7e4f
Depends-on: I0ad3d17107efc7b0e59f1dd54d5733cd1572a2b7
Change-Id: I0d6d7ddd91bbb21995142808248d162e05696d47
From 1% of lines to 12% in deferred/.
From 6% of lines to 68% in DeferredUpdates.php.
* Adding relevant @covers tags to existing tests.
* Add coverage for MWCallableUpdate.
* Add coverage for MergeableUpdate.
Also:
* Make MergeableUpdate extend DeferrableUpdate.
1. Because PHPUnit doesn't support implementing multiple interfaces
in a mock, and would make the mock fail the typehint at run-time.
2. It DeferredUpdates doesn't support having a MergeableUpdate that isn't
itself a DeferrableUpdate given the only way to reach that code is past
methods that are type-hinted with DeferrableUpdate.
3. Making the interface extend DeferrableUpdate helps produce better and
earlier errors. Instead of run-time error:
> Argument 1 passed to addUpdate() must implement interface DeferrableUpdate
> instance of MergeableUpdate given
We get:
> Fatal error: Class .. contains 1 abstract method and must therefore be
> declared abstract or implement the remaining methods (doUpdate)
Change-Id: Ie384bf849a96bb37dc3e4a4154da2b02889e9fc8
* DeferrableUpdate classes can implement MergeableUpdate.
Duplicate updates will be merged via the merge() method.
* Make SquidUpdate support merge() so that duplicate URL
purges are now caught accross the entire pre-send request
execution.
Change-Id: Idffdd3e71d89e4a0f28281e65a881113caae497c
