Joel Bernstein created SOLR-8577:
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Summary: Add AlertStream and ModelStream to the Streaming API
Key: SOLR-8577
URL: https://issues.apache.org/jira/browse/SOLR-8577
Project: Solr
Issue Type: New Feature
Reporter: Joel Bernstein
The AlertStream will return the top N "new" documents for a query from a
SolrCloud collection. The AlertStream will track the highest version numbers
from each shard and use these as checkpoints to determine new content.
The DaemonStream (SOLR-8550) can be used to create "live" alerts that run at
intervals. Sample syntax:
{code}
daemon(alert(collection1, q="hello") runInterval="2000")
{code}
The DaemonStream can be installed in a SolrCloud worker node where it can llive
and send out alerts.
The *AlertStream* will also accept an optional *ModelStream* which will apply a
machine learning model to the alert. For example:
alert(collection1, q="hello", model(collection2, id="model1"))
The ModelStream will return a machine learning model saved in a SolrCloud
collection. Function queries for different model types will be developed so the
models can be applied in the re-ranker or as a sort.
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