Java Simon is a simple monitoring API that allows you to follow and better understand your application. Monitors (familiarly called Simons) are placed directly into your code and you can choose whether you want to count something or measure time/duration.
Current version 3.4 (released on August, 2013) provides core monitor functionality, extensibility via Callbacks, JMX and Spring integration tools (AOP based), Java EE monitoring (Servlet filter, EJB interceptor) and easy to use JDBC4 proxy driver that measures JDBC performance and can log all statements too. This all can be displayed on web-based Console. Version requires Java SE 6 or higher.
