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From "Joel Bernstein (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (SOLR-9684) Add scheduler Streaming Expression
Date Fri, 30 Dec 2016 18:35:58 GMT

     [ https://issues.apache.org/jira/browse/SOLR-9684?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Joel Bernstein updated SOLR-9684:
---------------------------------
    Description: 
SOLR-9559 adds a general purpose *parallel task executor* for streaming expressions. The executor()
function executes a stream of tasks and doesn't have any concept of task priority.

The scheduler() function wraps two streams, a high priority stream and a low priority stream.
The scheduler function emits tuples from the high priority stream first, and then the low
priority stream.

The executor() function can then wrap the scheduler function to see tasks in priority order.

Pseudo syntax:
{code}
daemon(executor(scheduler(topic(tasks, q="priority:high"), topic(tasks, q="priority:low"))))
{code}








  was:
SOLR-9559 adds a general purpose *parallel task executor* for streaming expressions. The executor()
function executes a stream of tasks and doesn't have any concept of task priority.

The scheduler() function wraps two streams, a high priority stream and a low priority stream.
The scheduler function emits tuples from the high priority stream first, and then the low
priority stream.

The executor() function can then wrap the scheduler function to see tasks in priority order.

Pseudo syntax:
{code}
daemon(executor(scheduler(topic(tasks, q="priority:high"), topic(tasks, "priority:low"))))
{code}









> Add scheduler Streaming Expression
> ----------------------------------
>
>                 Key: SOLR-9684
>                 URL: https://issues.apache.org/jira/browse/SOLR-9684
>             Project: Solr
>          Issue Type: New Feature
>      Security Level: Public(Default Security Level. Issues are Public) 
>            Reporter: Joel Bernstein
>            Assignee: Joel Bernstein
>         Attachments: SOLR-9684.patch, SOLR-9684.patch, SOLR-9684.patch
>
>
> SOLR-9559 adds a general purpose *parallel task executor* for streaming expressions.
The executor() function executes a stream of tasks and doesn't have any concept of task priority.
> The scheduler() function wraps two streams, a high priority stream and a low priority
stream. The scheduler function emits tuples from the high priority stream first, and then
the low priority stream.
> The executor() function can then wrap the scheduler function to see tasks in priority
order.
> Pseudo syntax:
> {code}
> daemon(executor(scheduler(topic(tasks, q="priority:high"), topic(tasks, q="priority:low"))))
> {code}



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