Details
-
Improvement
-
Status: Closed
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Major
-
Resolution: Fixed
-
0.9.2
-
None
Description
the idea of this patch is to allow writing server functions and clients calls using future/promise style.
for instance a server function:
{
divide: function(n1, n2, result) {
if (n2 === 0) {
var x = new ttypes.InvalidOperation();
result(x);
return;
}
result(null, n1/n2);
}
}
might be written as:
{
divide: function(n1, n2) {
if (n2 === 0) {
throw new ttypes.InvalidOperation();
}
return n1/n2;
}
}
both style remains valid, the style to use is detected according to the function signature (is there a last argument for the callback).
when using promise style, a promise can also be return in stead of the result for asynchronous results.
the client side might use promise as well:
client.calculate(1, work, function(err, message) { if (err) { console.log("InvalidOperation " + err); } else { console.log('Whoa? You know how to divide by zero?'); } });
might be written as:
client.calculate(1, work) .then(function(message) { console.log('Whoa? You know how to divide by zero?'); }) .fail(function(err) { console.log("InvalidOperation " + err); });