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hof:until( function($f) { jobs:finishedwait($query) }, function($f) { prof:sleep(10) }, () ),
→jobs:eval
|-
| '''Summary'''
|Waits for the completion of a job with the specified {{Code|$id}}. If the function is called with the id of a queued job, or repeatedly executed job, it may stall and never terminate.
|-
| '''Errors'''
<pre class="brush:xquery">
jobs:eval("prof:sleep(1500)", (), map { 'interval': 'PT1S', 'end': 'PT10S' })
</pre>
* The following expression, if stored as a file, calls and evaluates itself every 5 seconds:
<pre class="brush:xquery">
jobs:eval(
file:read-text(static-base-uri()),
map { },
map { 'start': 'PT5S' }
)
</pre>
|}
};
</pre>
* The following query demonstrates how the results of an asynchronously executed query can be returned within the same query. Please remember that this is not the common way how these functions will be used in practice:
<pre class='brush:xquery'>
let $query := jobs:eval('(1 to 10000000)[. = 1]', map{}, map{ 'cache': true() })
return (
jobs:result($query)
)
</pre>
Please note that this query can easily cause a deadlock if the asynchronously executed query will be queued. In practice. In practice, you should avoid this pattern and resort to [[XQuery Module#xquery:fork-join|xquery:fork-join]] if you want to do things in parallel.
|}
