CODEWITHSUNDEEP
node.jsasynchronouscontrol-flow
user87267867
user87267867

Reputation: 1419

Run several asynchronous functions in parallel

I have one object which contains two different methods

var samp {
 m1: func1,
 m2: func2
}

Depending on the number of keys I want to call all the three function parallely Now Im using the following code which runs serially.

switch (sampType) {
            case "m1":
            {
                return new func1();
                break;
            }
            case "m2":
            {
                return new func2();
                break;
            }
            default:
            {
            }
        }

How can I execute all the methods parallely in node.js? Any help on this will be really helpful

Upvotes: 3

Views: 4765

Answers (3)

Daniel Garmoshka
Daniel Garmoshka

Reputation: 6352

Another elegant way to do this - using "wiring":

var l = new Wire();

func1(l.branch('post'));
func2(l.branch('comments'));

l.success(function(results) { ... });
// result will be object with results: { post: ..., comments: ...}

https://github.com/garmoshka-mo/mo-wire

Upvotes: 1

chris-l
chris-l

Reputation: 2841

Try to use Step.js or bacon.js or async.

With bacon.js, you can do things like: 

var result  = Bacon.fromNodeCallback(func1, parameters).toProperty();
var onemore = Bacon.fromNodeCallback(func2, parameters).toProperty();

Those two functions are going to be executed on parallel. And then you can have a function to use those two vars like this: 

var combined = Bacon.combineAsArray(result, onemore);
combined.onValue(function (an_array) {
   // do stuff with an_array, which contains result and onemore
});

Upvotes: 1

fakewaffle
fakewaffle

Reputation: 3081

Check out async.parallel. You would essentially write:

async.parallel( [

    function ( callback ) {
        // Code
    },

    function ( callback ) {
        // Code
    }

], function ( error, results ) {
    // Both done
} );

Upvotes: 4

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