/**
* Executes example of calculation of the greatest common divisor (GCD) and the lowest common
* multiple (LCM) for each generated pair of integers using new functional APIs.
*
* @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 Exception {
// Typedefs:
// ---------
// G -> GridFactory
// CI1 -> GridInClosure
// CO -> GridOutClosure
// CA -> GridAbsClosure
// F -> GridFunc
G.in(
args.length == 0 ? null : args[0],
new CIX1<Grid>() {
@Override
public void applyx(Grid g) throws GridException {
// Bound for random numbers.
int bound = 100;
// Collection size.
int size = 10;
// Initialises collection of pair random numbers.
Collection<int[]> pairs = new ArrayList<int[]>(size);
// Fills collection.
for (int i = 0; i < size; i++) {
pairs.add(
new int[] {
GridNumberUtilExample.getRand(bound), GridNumberUtilExample.getRand(bound)
});
}
// Calculates and prints GCD and LCM for each pair of numbers with closure.
g.run(
SPREAD,
F.yield(
pairs,
new CI1<int[]>() {
@Override
public void apply(int[] pair) {
int gcd = GridNumberUtilExample.getGCD(pair[0], pair[1]);
int lcm = GridNumberUtilExample.getLCM(pair[0], pair[1]);
System.out.printf(
">>>>> Numbers: %d and %d. GCD: %d. LCM: %d.%n",
pair[0], pair[1], gcd, lcm);
}
}));
// Prints.
X.println(">>>>> Check all nodes for numbers and their GCD and LCM output.");
}
});
}
/**
* Executes information gathering example with closures.
*
* @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 Exception {
// Typedefs:
// ---------
// G -> GridFactory
// CI1 -> GridInClosure
// CO -> GridOutClosure
// CA -> GridAbsClosure
// F -> GridFunc
G.in(
args.length == 0 ? null : args[0],
new CIX1<Grid>() {
@Override
public void applyx(Grid g) throws GridException {
// Broadcast closure to all nodes for gathering their system information.
String res =
g.reduce(
GridClosureCallMode.BROADCAST,
Collections.<GridOutClosure<String>>singleton(
new CO<String>() {
@Override
public String apply() {
StringBuilder buf = new StringBuilder();
buf.append("OS: ")
.append(System.getProperty("os.name"))
.append(" ")
.append(System.getProperty("os.version"))
.append(" ")
.append(System.getProperty("os.arch"))
.append("\nUser: "******"user.name"))
.append("\nJRE: ")
.append(System.getProperty("java.runtime.name"))
.append(" ")
.append(System.getProperty("java.runtime.version"));
return buf.toString();
}
}),
new R1<String, String>() {
private StringBuilder buf = new StringBuilder();
@Override
public boolean collect(String s) {
buf.append("\n").append(s).append("\n");
return true;
}
@Override
public String apply() {
return buf.toString();
}
});
// Print result.
X.println("Nodes system information:");
X.println(res);
}
});
}
