VisClient/org/hfbk/util/StartupProfiler.java

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package org.hfbk.util;

import java.io.FileNotFoundException;
import java.io.PrintStream;
import java.util.Map;

import org.hfbk.vis.VisClient;

public class StartupProfiler extends Thread {

        Counter<String> sup = new Counter<String>();

        boolean running=true;
        
        public StartupProfiler() {
                Runtime.getRuntime().addShutdownHook(new Thread(){
                        public void run() {
                                close();
                        }
                });
                setName("StartupProfiler");
                setDaemon(true);
                setPriority(Thread.MAX_PRIORITY);
                start();
        }
        
        public void run() {
                try {
                        while (running) {                               
                                for (Map.Entry<Thread,StackTraceElement[]> st:  Thread.getAllStackTraces().entrySet()){
                                        String trace=st.getKey().getName();
                                        for (StackTraceElement ste : st.getValue())
                                                trace+=":"+ste.getClassName()+"."+ste.getMethodName();
                                        sup.add(trace);
                                }
                                Thread.sleep(10);
                        }
                } catch (Exception e) {
                        throw new RuntimeException (e);
                }
        }

        void close(){
                running=false;
                try {
                        PrintStream ps=new PrintStream("profile.txt");
                        
                        for (Map.Entry<String, Integer> count: sup.entrySet())
                                ps.printf("%8d %s \n", count.getValue(), count.getKey() );
                        
                        ps.close();
                        System.out.println("Saved Thread Samples.");
                } catch (FileNotFoundException e) {
                        throw new RuntimeException (e);
                }
        }

        public static void main(String[] args) throws Exception {
                new StartupProfiler();
                VisClient.main(args);
                
                 
        }
}

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