Apache Sling
Apache Sling is an open-source web framework for Java that uses a RESTful approach to build content-centric applications on top of the Java Content Repository (JCR) standard, such as Apache Jackrabbit. It maps HTTP requests to content resources based on their paths, allowing developers to create applications by focusing on content structure rather than low-level servlet programming. Sling is particularly known for its use in Adobe Experience Manager (AEM) as the underlying framework for content management and delivery.
Developers should learn Apache Sling when building content-driven web applications, especially in enterprise environments that require robust content management and integration with JCR-based repositories. It is essential for working with Adobe Experience Manager (AEM) projects, as AEM relies heavily on Sling for handling content rendering, scripting, and REST APIs. Use cases include developing custom components for AEM, creating headless CMS backends, or building scalable web applications that leverage structured content storage.