quickprojects/templateFiles/LWJGLMacRunner.txt

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package mainPackage;

import java.io.BufferedReader;
import java.lang.management.ManagementFactory;
import java.util.ArrayList;
import java.util.List;
import java.lang.ProcessBuilder;
import java.io.InputStream;
import java.io.InputStreamReader;


public class MacRunner {
   public static boolean restartJVM() {
      
      String osName = System.getProperty("os.name");
      
      // if not a mac return false
      if (!osName.startsWith("Mac") && !osName.startsWith("Darwin")) {
         return false;
      }
      
      // get current jvm process pid
      String pid = ManagementFactory.getRuntimeMXBean().getName().split("@")[0];
      // get environment variable on whether XstartOnFirstThread is enabled
      String env = System.getenv("JAVA_STARTED_ON_FIRST_THREAD_" + pid);
      
      // if environment variable is "1" then XstartOnFirstThread is enabled
      if (env != null && env.equals("1")) {
         return false;
      }
      
      // restart jvm with -XstartOnFirstThread
      String separator = System.getProperty("file.separator");
      String classpath = System.getProperty("java.class.path");
      String mainClass = System.getenv("JAVA_MAIN_CLASS_" + pid);
      String jvmPath = System.getProperty("java.home") + separator + "bin" + separator + "java";
      
      List<String> inputArguments = ManagementFactory.getRuntimeMXBean().getInputArguments();
      
      ArrayList<String> jvmArgs = new ArrayList<String>();
      
      jvmArgs.add(jvmPath);
      jvmArgs.add("-XstartOnFirstThread");
      jvmArgs.addAll(inputArguments);
      jvmArgs.add("-cp");
      jvmArgs.add(classpath);
      jvmArgs.add(mainClass);
      
      // if you don't need console output, just enable these two lines 
      // and delete bits after it. This JVM will then terminate.
      //ProcessBuilder processBuilder = new ProcessBuilder(jvmArgs);
      //processBuilder.start();
      
      try {
         ProcessBuilder processBuilder = new ProcessBuilder(jvmArgs);
         processBuilder.redirectErrorStream(true);
         Process process = processBuilder.start();
         
         InputStream is = process.getInputStream();
         InputStreamReader isr = new InputStreamReader(is);
         BufferedReader br = new BufferedReader(isr);
         String line;
         
         while ((line = br.readLine()) != null) {
            System.out.println(line);
         }
         
         process.waitFor();
      } catch (Exception e) {
         e.printStackTrace();
      }
      
      return true;
   }
}