MainClass.java Source code

Introduction

Here is the source code for MainClass.java

Source

import java.io.PrintWriter;
import java.lang.instrument.Instrumentation;
import java.lang.management.ManagementFactory;
import java.lang.management.MemoryPoolMXBean;
import java.lang.management.MemoryUsage;
import java.lang.management.ThreadMXBean;
import java.util.List;

public class MainClass {

    public static void main(String[] a) {
        //premain();

    }

    public static void premain(final Instrumentation inst) {
        Runtime.getRuntime().addShutdownHook(new Thread() {
            public void run() {
                try {
                    PrintWriter out = new PrintWriter(System.err);

                    ThreadMXBean tb = ManagementFactory.getThreadMXBean();
                    out.printf("Current thread count: %d%n", tb.getThreadCount());
                    out.printf("Peak thread count: %d%n", tb.getPeakThreadCount());

                    List<MemoryPoolMXBean> pools = ManagementFactory.getMemoryPoolMXBeans();
                    for (MemoryPoolMXBean pool : pools) {
                        MemoryUsage peak = pool.getPeakUsage();
                        out.printf("Peak %s memory used: %,d%n", pool.getName(), peak.getUsed());
                        out.printf("Peak %s memory reserved: %,d%n", pool.getName(), peak.getCommitted());
                    }

                    Class[] loaded = inst.getAllLoadedClasses();
                    out.println("Loaded classes:");
                    for (Class c : loaded)
                        out.println(c.getName());
                    out.close();
                } catch (Throwable t) {
                    System.err.println("Exception in agent: " + t);
                }
            }
        });
    }
}