The Java and the Furious (JMX)

Talk given at Codemotion 2016 in Madrid about how to measure (Java) code speed and health with JMX.

1. The JAVA and the FURIOUS Talk by Yeray Darias at Codemotion in Madrid on Friday, 18 November 2016
2. The JAVA and the FURIOUS Cómo medir la velocidad de tu código Java con JMX
3. JMX Java Management eXtensions
5. @ydarias Yeray Darias SOFTWARE DEVELOPER yeray@8kdata.com
6. • 35YO • BSc Computer Science • Agile evangelist • Cook • Science geek • Future space rocket builder • Sketchnoting practitioner Yeray Darias
7. Let’s start
10. What is JMX?
11. JMX manage Web Browser MBean Server MBean MBean MBean JVM Agent level Instrumentation level Services level
12. JMX manage Web Browser MBean Server MBean MBean MBean JVM Agent level Instrumentation level Services level
13. What is JMX?
14. What is JMX for?
15. Monitoring
16. Manage
18. JMX manager Web Browser MBean Server MBean MBean MBean JVM Instrumentation Level
19. Define the interface public interface SystemStatsMBean { public long getTotalWrites(); public long setTimeout(long timeout); }
20. Implement the interface public class SystemStats implements SystemStatsMBean { public long getTotalWrites() { … } public void setTimeout(long timeout) { … } }
21. Register MBean SystemStats systemStats = new SystemStats(metrics, configuration);
 
 MBeanServer beansServer = ManagementFactory.getPlatformMBeanServer(); 
 ObjectName beanName = new ObjectName(“…”); 
 beansServer.registerMBean( systemStats, beanName);
22. Launch & connect
23. Where is the f·$%& demo?
24. Good practices defining MBeans Good practices
26. No way
27. Single responsibility principle Don’t mix your “core” with instrumentation code.
28. It is a lot of work, isn’t it?
30. Demo time
31. JMX manager Web Browser MBean Server MBean MBean MBean JVM Services Level
32. The “official” options
36. The “unofficial” options
40. Tons of options
41. The options “ultra pro”
42. The options “expensive”
47. The “craftsman” option
48. Connect to the server JMXServiceURL url = new JMXServiceURL(…); JMXConnector connector = JMXConnectorFactory.connect(url); MBeanServerConnection serverConnection = connector.getMBeanServerConnection();
49. Search the MBean ObjectName mbeanName = new ObjectName(…); SystemStatsMBean statsProxy = MBeanServerInvocationHandler.newProxyInstance( serverConnection, mbeanName, SystemStatsMBean.class, true);
51. Last demo Last demo
52. This is all?
53. Interesting links http://bit.ly/codemotion2016-links
54. Slides Speaker Deck http://bit.ly/codemotion2016-slides
55. Q & A