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From "ASF GitHub Bot (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (QUARKS-131) need easy way to get PeriodicMXBean associated with a poll() invocation
Date Wed, 20 Apr 2016 18:58:25 GMT

    [ https://issues.apache.org/jira/browse/QUARKS-131?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15250504#comment-15250504
] 

ASF GitHub Bot commented on QUARKS-131:
---------------------------------------

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

    https://github.com/apache/incubator-quarks/pull/86#discussion_r60467472
  
    --- Diff: api/graph/src/main/java/quarks/graph/Connector.java ---
    @@ -115,5 +115,27 @@ Licensed to the Apache Software Foundation (ASF) under one
          * 
          * @return set of tag values.
          */
    -    Set<String> getTags(); 
    +    Set<String> getTags();
    +    
    +    /**
    +     * Set the alias for the connector.
    +     * <p>
    +     * The alias must be unique within the topology.
    +     * The alias may be used in various contexts:
    +     * <ul>
    +     * <li>Runtime control services for the connector are registered with this
alias.</li>
    --- End diff --
    
    I'm a bit confused by "Runtime control services for the connector".  At the high level,
a control service provides an interface for controlling the stream and is registered with
the TStream's alias.



> need easy way to get PeriodicMXBean associated with a poll() invocation
> -----------------------------------------------------------------------
>
>                 Key: QUARKS-131
>                 URL: https://issues.apache.org/jira/browse/QUARKS-131
>             Project: Quarks
>          Issue Type: Improvement
>            Reporter: Dale LaBossiere
>            Assignee: Dale LaBossiere
>
> I think we're missing some API is missing to make this all usable.
> A Topology/TStream domain user needs an easy way to get the PeriodicMXBean for a particular
Topology.poll() invocation. 
> The PeriodicSource oplet implements PeriodicMXBean which allows changing the period.
 
> The only demonstrated use is by DirectJobTest.jobPeriodicSourceCancellation(), which
iterates over the Topology's underlying graph for instanceof PeriodicSource oplet (it's the
only ProcessSource oplet in the graph for this test).  
> That's certainly not easy / convenient / nor in the "TStream" domain the user is mostly
operating in.
> [~djd] [~vdogaru] what schemes for addressing this have already been considered / decided?
 Some sort of "control bean registry service" where a user gets to supply a name (e.g., to
poll()) and the runtime registers the bean (e.g., PeriodicMXBean) under that name?  If there's
not a concrete plan lets work on that here.



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