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You could choose to delegate the monitoring to a dedicated tool like <a href="http://www.cacti.net/" rel="nofollow noreferrer">Cacti</a>, <a href="http://www.centreon.com/" rel="nofollow noreferrer">Centreon</a>, or <a href="http://www.zenoss.com/" rel="nofollow noreferrer">Zenoss</a> but this might be a bit overkill for a single application. For a simple solution, JMX might indeed be a better solution. As starting point, I suggest reading the following article: <a href="http://onjava.com/pub/a/onjava/2004/09/29/tigerjmx.html" rel="nofollow noreferrer">Monitoring Local and Remote Applications Using JMX 1.2 and JConsole</a>. Then, have a look at <a href="http://java.sun.com/developer/technicalArticles/J2SE/jconsole.html" rel="nofollow noreferrer">Using JConsole to Monitor Applications</a>, a very detailed article that shows how to use JConsole to access several core monitoring and management functionalities provided by the Java platform including: <blockquote> <ul> <li>Detect low memory</li> <li>Enable or disable GC and class loading verbose tracing</li> <li>Detect deadlocks</li> <li>Control the log level of any loggers in an application</li> <li>Access OS resources—Sun's platform extension</li> <li>Manage an application's Managed Beans (MBeans)</li> </ul> </blockquote> But, AFAIK, JMX won't give you access to network IO so you might need a combination of these tools. Luckily, many tools (e.g. Cacti, <a href="http://oss.oetiker.ch/smokeping/" rel="nofollow noreferrer">SmokePing</a>) use the RDD format that you can easily manipulate with Java APIs like <strike><a href="http://oldwww.jrobin.org/" rel="nofollow noreferrer">JRobin</a></strike> or <a href="https://rrd4j.dev.java.net/" rel="nofollow noreferrer">rdd4j</a>.
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1. POSimple Server Monitoring with Java
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1. USPascal Thivent
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