How to ensure that one task happens only after another task ends

Question

Don't make it duplicate please. I am in middle of a big problem. I am working on a javascript code with thousands of lines of code. My problem is:

methodA is called from its own class.

methodA{  
    doSomething(abc, def, function(obj){  
        obj.getName();  
    });  
}  

doSomething(abc, def, callback){  
// codes....
callback(new XYZ());  
}

In XYZ class constructor I am using a couple of Jquery Deffered objects(with ajax calls). So my problem is at obj.getName() I am getting error that this.name is not defined. So how can I ensure that entire new XYZ() execution ends completely(all ajax calls, callbacks etc.) when the control comes to obj.getName() function ?

Thanks

can't you write the methodA in the callback of XYZ()? – Amin Jafari Jun 17 '14 at 10:18 — Amin Jafari, Jun 17 '14 at 10:18
First thing you gotta do is to write valid javascript! – Roamer-1888 Jun 18 '14 at 00:22 — Roamer-1888, Jun 18 '14 at 00:22

score 1 · Answer 1 · edited May 23 '17 at 12:21

1

You can use function call back for this purpose. more can be searched on google by jquery deferred As shown here

var jqDeferred = doSomething(abc,def,function(obj){

});

jqDeferred.done(function(){
obj.getName();  
})


doSomething(abc,def,callback)
{

}

edited May 23 '17 at 12:21

Community

1
1

answered Jun 17 '14 at 10:19

anirban

674
1
7
21

score 0 · Answer 2 · answered Jun 17 '14 at 10:24

0

you can use .when and .then => http://api.jquery.com/jquery.when/

methodA{  
    doSomething(abc, def, function(obj){  
        $.when(callback(new XYZ())).then(obj.getName());  
    });

answered Jun 17 '14 at 10:24

Amin Jafari

7,157
2
18
43

How to ensure that one task happens only after another task ends

2 Answers2