Setup
1) Install this plugin just to make testing easier:
https://github.com/catalyst/moodle-tool_testtasks
Testing scenario 1. Execution without keep-alive
1) Queue up just a couple ad hoc tasks
php admin/tool/testtasks/cli/queue_adhoc_tasks.php -d=1 -n=1
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2) Run the ad hoc task runner:
php admin/tool/task/cli/adhoc_task.php -e
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3) Check the ad hoc task runner runs and then halts normally afterwards:
Execute adhoc task: tool_testtasks\task\timed_adhoc_task
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... started 14:08:01. Current memory use 15.2MB.
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Starting adhoc task '1 of 1' wth duration: 1
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adhoc task running: 1/1 seconds
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Ending adhoc task '1 of 1' with duration: 1
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... used 0 dbqueries
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... used 1.0032410621643 seconds
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Adhoc task complete: tool_testtasks\task\timed_adhoc_task
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Ran 1 adhoc tasks found at Tue, 03 Dec 2019 14:08:01 +0100
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Testing scenario 2. Execution with short keep alive
1) Run the ad hoc task runner in keep alive mode:
php admin/tool/task/cli/adhoc_task.php --execute --keep-alive=10
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2) Check it sits there waiting and drawing dots every second ...
Waiting for more adhoc tasks to be queued .....
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3) Check after 10 seconds it exits.
Testing scenario 3. Execution with long keep alive
1) Run the ad hoc task runner and keep it alive for ages
php admin/tool/task/cli/adhoc_task.php -e -k=1000
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2) In another terminal queue up a task:
php admin/tool/testtasks/cli/queue_adhoc_tasks.php -d=1 -n=1
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3) In the first tab, check this task get processed within a second.
Waiting for more adhoc tasks to be queued ..........
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Execute adhoc task: tool_testtasks\task\timed_adhoc_task
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... started 14:13:42. Current memory use 15.2MB.
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Starting adhoc task '1 of 1 ' wth duration: 1
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adhoc task running: 1/1 seconds
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Ending adhoc task '1 of 1 ' with duration: 1
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... used 0 dbqueries
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... used 1.0078918933868 seconds
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Adhoc task complete: tool_testtasks\task\timed_adhoc_task
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4) In the first tab, check it will go back to waiting.
Waiting for more adhoc tasks to be queued .............
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5) In the second tab, purge the cache.
php admin/cli/purge_caches.php
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6) In the first tab, check the adhoc task script exits as normal.
Improvement
Minor
MDL-66927 Cron does not process ad hoc tasks which have been queued since cron started
