Created
March 22, 2017 10:41
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/* | |
* To change this license header, choose License Headers in Project Properties. | |
* To change this template file, choose Tools | Templates | |
* and open the template in the editor. | |
*/ | |
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); | |
} | |
} | |
} |
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