// function to do the join use case public static void share() throws Exception { HttpPost method = new HttpPost(url + "/share"); String ipAddress = null; Enumeration<NetworkInterface> en = NetworkInterface.getNetworkInterfaces(); while (en.hasMoreElements()) { NetworkInterface ni = (NetworkInterface) en.nextElement(); if (ni.getName().equals("eth0")) { Enumeration<InetAddress> en2 = ni.getInetAddresses(); while (en2.hasMoreElements()) { InetAddress ip = (InetAddress) en2.nextElement(); if (ip instanceof Inet4Address) { ipAddress = ip.getHostAddress(); break; } } break; } } method.setEntity(new StringEntity(username + ';' + ipAddress, "UTF-8")); try { ResponseHandler<String> responseHandler = new BasicResponseHandler(); connIp = client.execute(method, responseHandler); } catch (IOException e) { System.err.println("Fatal transport error: " + e.getMessage()); e.printStackTrace(); } // get present time date = new Date(); long start = date.getTime(); // Execute the vishwa share process Process p = Runtime.getRuntime().exec("java -jar vishwa/JVishwa.jar " + connIp); String ch = "alive"; System.out.println("Type kill to unjoin from the grid"); while (!ch.equals("kill")) { BufferedReader in = new BufferedReader(new InputStreamReader(System.in)); ch = in.readLine(); } p.destroy(); date = new Date(); long end = date.getTime(); long durationInt = end - start; String duration = String.valueOf(durationInt); method = new HttpPost(url + "/shareAck"); method.setEntity(new StringEntity(username + ";" + duration, "UTF-8")); try { client.execute(method); } catch (IOException e) { System.err.println("Fatal transport error: " + e.getMessage()); e.printStackTrace(); } }
// function to do the compute use case public static void compute() throws Exception { HttpPost method = new HttpPost(url + "/compute"); method.setEntity(new StringEntity(username, "UTF-8")); try { ResponseHandler<String> responseHandler = new BasicResponseHandler(); connIp = client.execute(method, responseHandler); } catch (IOException e) { System.err.println("Fatal transport error: " + e.getMessage()); e.printStackTrace(); } System.out.println("Give the file name which has to be put in the grid for computation"); // input of the file name to be computed BufferedReader in = new BufferedReader(new InputStreamReader(System.in)); String name = in.readLine(); // get the absolute path of the current working directory File directory = new File("."); String pwd = directory.getAbsolutePath(); // get present time date = new Date(); long start = date.getTime(); String cmd = "java -classpath " + pwd + "/vishwa/JVishwa.jar:. " + name + " " + connIp; System.out.println(cmd); // Execute the vishwa compute process Process p = Runtime.getRuntime().exec(cmd); // wait till the compute process is completed // check for the status code (0 for successful termination) int status = p.waitFor(); if (status == 0) { System.out.println("Compute operation successful. Check the directory for results"); } date = new Date(); long end = date.getTime(); long durationInt = end - start; String duration = String.valueOf(durationInt); method = new HttpPost(url + "/computeAck"); method.setEntity(new StringEntity(username + ";" + duration, "UTF-8")); try { client.execute(method); } catch (IOException e) { System.err.println("Fatal transport error: " + e.getMessage()); e.printStackTrace(); } }