[jira] [Commented] (SOLR-8550) Add asynchronous streams to the Streaming API to facilitate alerting

["Joel Bernstein (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/SOLR-8550?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15098459#comment-15098459 ] 

Joel Bernstein commented on SOLR-8550:
--------------------------------------

The general design is to add a new AsyncStream which will be handled differently by the /stream handler. When the /stream handler sees a AsyncStream it will open it and just keep it around in a memory. The AsyncStream will have a thread that wakes up periodically and opens, reads, and closes it's underlying stream. Syntax would look like this:

{code}
async{alert())
{code}

The AlertStream would be a new stream created in a different ticket. 

Parallel async streams should work fine as well, facelitating very large scale alerting systems:
{code}
parallel(async(alert()))
{code}

In the parallel example the AsyncStream would be pushed to worker nodes where they would live.



> Add asynchronous streams to the Streaming API to facilitate alerting
> --------------------------------------------------------------------
>
>                 Key: SOLR-8550
>                 URL: https://issues.apache.org/jira/browse/SOLR-8550
>             Project: Solr
>          Issue Type: Bug
>            Reporter: Joel Bernstein
>
> Currently all streams are are synchronously *pulled* from a client.
> It would be great to add the capability to have Asyncronous streams that live within Solr that can *push* content as well. This would facilite very large scale alerting.



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