// Given the promises of name and salutation, returns a promise of greeting.
public Promise<String> getGreeting() {
Promise<String> p =
q.all(getSalutation(), getName())
.then(
new Continue<String, JSArray<?>>() {
// Formats the greeting when salutation and name are delivered.
@Override
public String call(JSArray<?> value) {
return value.get(0) + ", " + value.get(1) + "!";
}
});
return p;
}
// Returns a promise of name by simulating an asynchronous call with a time-out.
public Promise<String> getName() {
final Deferred<String> d = q.defer();
Timer timer =
new Timer() {
@Override
public void run() {
d.progress(new TimerProgress("Loaded name", this));
d.resolve("World");
}
};
d.progress(new TimerProgress("Loading name...", timer));
timer.schedule(500);
return d.promise();
}
// Returns a promise of salutation by simulating an asynchronous call with a time-out.
public Promise<String> getSalutation() {
final Deferred<String> d = q.defer();
Timer timer =
new Timer() {
@Override
public void run() {
d.progress(new TimerProgress("Loaded salutation", this));
d.resolve("Hello");
}
};
d.progress(new TimerProgress("Loading salutation...", timer));
timer.schedule(1000);
return d.promise();
}