Using RealTime Get

Solr also provides us with a way to see documents that are sent to it for indexing but are not indexed or have a commit/soft commit time in the future. This feature also makes Solr behave like a NoSQL data store, wherein we can fetch a document by unique key.

Let's see how we can use this feature in Solr by performing the following steps:

1. Let's add the RealTime Get (/get) request handler to solr-config.xml, as follows:

     <requestHandler name="/get" class="solr.RealTimeGetHandler">
       <lst name="defaults">
         <str name="omitHeader">true</str>
         <str name="wt">json</str>
         <str name="indent">true</str>
       </lst>
     </requestHandler>

2. After adding requestHandler, we'll need to change updateLog in updateHandler. This is because RealTime Get uses the updateLog feature to work. The updateLog element or transaction log is a feature in Solr wherein data is written to a transaction log file before indexing. During...