source: trunk/org.etsi.common/src/org/etsi/common/MemoryTest.java @ 57

package org.etsi.common;

import java.io.BufferedReader;
import java.io.InputStreamReader;

public class MemoryTest {

        public static void main(String[] args) {
                try {
                        int heap = 512;
                        int heapIncrement = 128;
                        while(startSecondJVM(heap+heapIncrement)==0){
                                heap+=heapIncrement;
                        }
                        System.out.println(heap-2*heapIncrement);
                } catch (Exception e) {
                        // TODO Auto-generated catch block
                        e.printStackTrace();
                }
        }
        public static int startSecondJVM(int heap) throws Exception {
            String separator = System.getProperty("file.separator");
            String classpath = System.getProperty("java.class.path");
            String path = System.getProperty("java.home")
                    + separator + "bin" + separator + "java";
            ProcessBuilder processBuilder = 
                    new ProcessBuilder(path, "-Xmx"+heap+"m", "-Xss128m", "-cp",
                    classpath, 
                    MemoryTestDummy.class.getName());
            Process process = processBuilder.start();
            process.waitFor();
//          BufferedReader br = new BufferedReader(new InputStreamReader(process.getInputStream()));
//          String line;
//          while((line = br.readLine())!=null){
//              System.out.println(":"+line);
//          }
            process.destroy();
            return process.exitValue();
        }
}