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From "ASF GitHub Bot (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (QUARKS-123) Add recipe for poll() source with adaptable poll rate
Date Thu, 21 Apr 2016 18:42:25 GMT

    [ https://issues.apache.org/jira/browse/QUARKS-123?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15252432#comment-15252432
] 

ASF GitHub Bot commented on QUARKS-123:
---------------------------------------

Github user dlaboss commented on a diff in the pull request:

    https://github.com/apache/incubator-quarks-website/pull/40#discussion_r60633997
  
    --- Diff: site/recipes/recipe_adaptable_polling_source.md ---
    @@ -0,0 +1,138 @@
    +---
    +title: Changing a Polled Source Stream's Period
    +---
    +
    +The [Writing a Source Function](recipe_source_function.html) recipe introduced the basics
of creating a source stream by polling a data source periodically.
    +
    +Oftentimes, a user wants the poll frequency to be adaptable rather than static.  For
example, an event such a sudden rise in a temperature sensor may motivate more frequent polling
of the sensor and analysis of the data until the condition subsides.  A change in the poll
frequency may be driven by locally performed analytics or via a command from an external source.
    +
    +A Quarks IotProvider and IoTDevice with its command streams would be a natural way to
control the application.  In this recipe we will just simulate a "set poll period" command
stream.
    --- End diff --
    
    done


> Add recipe for poll() source with adaptable poll rate
> -----------------------------------------------------
>
>                 Key: QUARKS-123
>                 URL: https://issues.apache.org/jira/browse/QUARKS-123
>             Project: Quarks
>          Issue Type: Task
>          Components: Documentation
>            Reporter: Dale LaBossiere
>            Assignee: Dale LaBossiere
>
> A use case is something like:  an application wants to increase the poll frequency /
rate of analytics once some trigger condition occurs.  The trigger condition may be detected
by local analytics.  Or perhaps the change in poll frequency will be the result of receiving
an IotDevice command.



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