/** {@inheritDoc} */
@Override
public Object onReceive(@Nullable Object obj) {
if (obj instanceof byte[]) {
X.println(">>> Byte array received over REST: " + Arrays.toString((byte[]) obj));
BigInteger val = new BigInteger((byte[]) obj);
X.println(">>> Unpacked a BigInteger from byte array received over REST: " + val);
return val;
} else return obj;
}
/** {@inheritDoc} */
@Override
public Object onSend(Object obj) {
if (obj instanceof BigInteger) {
X.println(">>> Creating byte array from BigInteger to send over REST: " + obj);
byte[] bytes = ((BigInteger) obj).toByteArray();
X.println(
">>> Created byte array from BigInteger to send over REST: " + Arrays.toString(bytes));
return bytes;
} else return obj;
}
/**
* Starts up grid and checks all provided values for prime.
*
* @param args Command line arguments, none required but if provided first one should point to the
* Spring XML configuration file. See {@code "examples/config/"} for configuration file
* examples.
* @throws GridException If example execution failed.
*/
public static void main(String[] args) throws GridException {
// Starts grid.
Grid grid = args.length == 0 ? G.start() : G.start(args[0]);
// Values we want to check for prime.
long[] checkVals = {32452841, 32452843, 32452847, 32452849, 236887699, 217645199};
X.println(">>>");
X.println(
">>> Starting to check the following numbers for primes: " + Arrays.toString(checkVals));
try {
long start = System.currentTimeMillis();
for (long checkVal : checkVals) {
// This method will be executed on the Grid as it is
// annotated with @Gridify annotation.
Long divisor = GridPrimeChecker.checkPrime(checkVal, 2, checkVal);
// If divisor is null, then the number is prime.
if (divisor == null) {
X.println("Value '" + checkVal + "'is a prime number.");
} else {
X.println("Value '" + checkVal + "' is divisible by '" + divisor + '\'');
}
}
long totalTime = System.currentTimeMillis() - start;
X.println(">>> Total time to calculate all primes (milliseconds): " + totalTime);
X.println(">>>");
} finally {
// Stops grid.
G.stop(grid.name(), true);
}
}