-- Jörg Hoh
JMX is the de-facto standard for monitoring java processes and applications. A lot of monitoring systems have the ability to consume these data.
By default CQ 5.5 has a number of MBeans, which offer runtime information about internal state. Most interesting ones are the MBeans about the repository state and the replication MBeans. But it isn’t hard to create your own MBeans, so you provide information about the internal state of your application to the monitoring system; or you can monitor resources which are critical to your application and use case.
In Cq5 we are working in a OSGI environment, so we will use one of my favorite patterns, the OSGI whiteboard pattern. We will use the JMX-Whiteboard bundle of the Apache Aries project to register services to JMX. Also that implementation is very short and understandable and shows the power of the whiteboard pattern. (I already had a short blog entry on this last year.)
In this example I want to demonstrate it on an already existing counter, the total number of requests handled by sling.It requires CQ 5.5, where the JMX whiteboard bundle is already deployed by default; but if you install the JMX Whiteboard bundle yourself, you can also use older versions of CQ5.
Read the complete post at the Things on a Content Management System blog.