TestJMX.java

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package testjmx;

import java.lang.management.ManagementFactory;
import java.util.Random;
import javax.management.MBeanServer;
import javax.management.ObjectName;

/**
 *
 * @author luca
 */
public class TestJMX {

    static public interface HelloMBean {
        int getRequestCount();
        double getRequestTime();
        int getRequestErrors();
        int getRequestOK();
        int getDBErrors();
    }
    static public class Hello implements HelloMBean {

        private final Random r;
        
        public Hello() {
            r = new Random();
        }
        @Override
        public int getRequestCount() {
            return r.nextInt(400);
        }

        @Override
        public double getRequestTime() {
            return r.nextDouble()*100.0;
        }

        @Override
        public int getRequestErrors() {
            return r.nextInt(400);
        }

        @Override
        public int getRequestOK() {
            return r.nextInt(400);
        }

        @Override
        public int getDBErrors() {
            return r.nextInt(400);
        }
        
    }
    /**
     * @param args the command line arguments
     * @throws java.lang.InterruptedException
     */
    public static void main(String[] args) throws Exception {
        Random r = new Random();
        final MBeanServer mbs = ManagementFactory.getPlatformMBeanServer(); 
        
        if(args.length >= 1) {
            int beans = Integer.parseInt(args[0]);
            System.err.printf("Registering %d beans\n", beans);
            for(int j = 0; j < beans; ++j) {
                final ObjectName name = new ObjectName(String.format("com.example:type=Hello,n=test%d", j));
                final HelloMBean hello = new Hello();
                mbs.registerMBean(hello, name);
            }
        }
        while (true) {
            for(int j = 0; j < 10; ++j) {
                byte[] t = new byte[(r.nextInt(6)+1) << 20];
            }
            System.gc();
            Thread.sleep((r.nextInt(10)+1)*100);
        }
    }

}