adam bien's blog

public interface MonitoringResourceMXBean {
    Map getDiagnostics();
}

@Singleton
@Startup
public class MonitoringResource implements MonitoringResourceMXBean {


    private ConcurrentHashMap diagnostics = new ConcurrentHashMap();

    private MBeanServer platformMBeanServer;
    private ObjectName objectName = null;


    @PostConstruct
    public void registerInJMX() {
        this.exceptionCount = new AtomicLong();
        try {
            objectName = new ObjectName("XRayMonitoring:type=" + this.getClass().getName());
            platformMBeanServer = ManagementFactory.getPlatformMBeanServer();
            platformMBeanServer.registerMBean(this, objectName);
        } catch (Exception e) {
            throw new IllegalStateException("Problem during registration of Monitoring into JMX:" + e);
        }
    }
//bookkeeping methods omitted

    @Override
    public Map getDiagnostics() {
        return diagnostics;
    }

    @PreDestroy
    public void unregisterFromJMX() {
        try {
            platformMBeanServer.unregisterMBean(this.objectName);
        } catch (Exception e) {
            throw new IllegalStateException("Problem during unregistration of Monitoring into JMX:" + e);
        }
    }
}