Apache Solr can be integrated with any subsystem given the technology integration feasibility. However, some of the subsystems provide additional plugins/modules through which such integration goes deeper. In this section, we will look at two different subsystems as a case study.

For any CMS, search is an integral part of the system. CMS contains most of the information that users are consistently updating every day. They also provide different versions of the same document, and many other features. However, many content management systems do not provide competitive search. This is mainly because the development focus of many CMSes have been around providing feature-rich, failsafe CMS for more practical usage. Besides web portal, CMSes are also widespread and many organizations use them heavily. Integrating Apache Solr Enterprise search with CMS brings the best of both worlds together. We will primarily look at the most popular open source CMS systems in...