// 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();
}
}