Ported Mx6 3.2 development changes

[jpulleman]

• Fixed an issue with “Queued” actions remaining in the “Open” actions tab.

• Fixed an issue with the process number of the QueuedAction not updating correctly.

• Fixed an issue with the process number of the QueuedAction resetting to “0” after the action was successfully processed.

• Removed Queue monitor information from QueueOverview page.
  o Queue monitor information did not refresh regularly quickly causing the information to become outdated. Unfortunately implementing refresh behavior did not appear to be easily possible.
  o Queue monitor information draws data from the underlying Java threads. The numbers did not always line-up with the information available in the QueueOverview page. This was confusing.
  o The fixes in the QueuedOverview page make the monitor even less relevant as the same information can now be drawn quite easily from the overview page itself.

• Completely replaced retry mechanism that ensures FIFO ordering of the queues by implementing a pre-processing mechanism.
  o This should result in much less error-prone handling of records that are not yet available for processing due to a slight delay between committing in a microflow (i.e. in one thread) and being able to retrieve the record from the database in another thread.
  o It should process large amounts of queued actions (added at once) quicker and more reliably as records that cannot be found in the database will no longer delay the entire pre-processing of queued actions.

• Removed while loop in ObjectQueueExecutor Java action that might have caused a queue to “hang”. An error will now be printed to the log instead.

• Added scheduled event SE_ReinitializeQueues
  o When you run into a situation where one or more queues appear to hang for long periods of time, reinitializing the queue(s) can be a workaround to get them to start executing actions again.
  By default this scheduled event runs once an hour.

• Removed full retry mechanism and replaced by preprocessing of actions before appending them to the queue.

• Made a few changes to the _QueueAppenderThread functionality (Java) so restarting the thread is now possible.

The preprocessing functionality should resolve the issue of "stuck" queued actions, which should resolve the following ticket:

• 59141 (this has been beta tested for >1 month with success by the ticket caller)

The above changes also resolve the Mx7.7+ context issue. So this should resolve the following tickets:

• 59621
• 59394
• 61702

Will release the above as version 4.1 to the AppStore (release package included).