EE6 and EE7 specifications has a specific place for the org.jboss.ejb3.annotation.Management and org.jboss.ejb3.annotation.Service.  Hence these jboss specific classes are not present in WildFly because the functionality provided by those classes are now standardized so you can try using    @Singleton to achieve the same functionality.

@javax.ejb.Singleton

@javax.ejb.Startup;

The following link gives more detailed example of the same:  http://codrspace.com/codertrader/making-an-mbean-ejb3-and-wildfly-compliant/

Example:

private ObjectName objectName = null;

@PostConstruct
    public void registerInJMX() {       

        logger.info( "Registering in JMX Console" );
        try {
            objectName = new ObjectName( "company:service=TimeoutServiceMBean" );
            MBeanServer mBeanServer = ManagementFactory.getPlatformMBeanServer();
            mBeanServer.registerMBean( this, objectName );
        } catch ( Exception e ) {
            throw new IllegalStateException( "Problem during registration into JMX:" + e );
        }
    }

Also as you mentioned that you want to be able to do that at run time via JMX Console.   Byt default the JMX Console is not shipped with WildFly or JBossAS7   (jmxconsole  usually is available with older version of JBoss).     If you meant to say    JConsole or some other jmx based client utility like JVisualVM  then yes,   the above link may be very useful.