Apache Sling is an OSGi-based framework for RESTful web-applications using an extensible content tree. In a nutshell, Sling maps HTTP request URLs to content resources based on the request’s path, extension and selectors. Using convention over configuration, requests are processed by scripts and servlets, dynamically selected based on the current resource. This fosters meaningful URLs and resource-driven request processing, while the modular nature of Sling allows for specialised server instances that include only what is needed.
Trace Compass is a powerful tool to solve performance and reliability issues by reading and analyzing traces and logs of a system. It has been always an integral part of the Trace Compass project to allow users to extend Trace Compass for custom trace and log formats, custom analysis and views using Java plug-in extensions or by loading user defined XML definitions on-the-fly.