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https://issues.apache.org/jira/browse/SOLR-9559?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Joel Bernstein updated SOLR-9559:
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Attachment: SOLR-9559.patch
Added parallel test case
> Add ExecutorStream to execute stored Streaming Expressions
> ----------------------------------------------------------
>
> Key: SOLR-9559
> URL: https://issues.apache.org/jira/browse/SOLR-9559
> Project: Solr
> Issue Type: New Feature
> Security Level: Public(Default Security Level. Issues are Public)
> Reporter: Joel Bernstein
> Assignee: Joel Bernstein
> Fix For: 6.3
>
> Attachments: SOLR-9559.patch, SOLR-9559.patch, SOLR-9559.patch
>
>
> The *ExecutorStream* will wrap a stream which contains Tuples with Streaming
> Expressions to execute. By default the ExecutorStream will look for the
> expression in the *expr* field in the Tuples.
> The ExecutorStream will have an internal thread pool so expressions can be
> executed in parallel on a single worker. The ExecutorStream can also be
> wrapped by the parallel function to partition the Streaming Expressions that
> need to be executed across a cluster of worker nodes.
> *Sample syntax*:
> {code}
> daemon(executor(threads=10, topic(storedExpressions, fl="expr", ...)))
> {code}
> In the example above a *daemon* wraps an *executor* which wraps a *topic*
> that is reading stored Streaming Expressions. The daemon will call the
> executor at intervals which will execute all the expressions retrieved by the
> topic.
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