parallel > waterfall, final callback issue

[olnoeve]

Hi,

I think this might just be a matter of me being new to javascript and having so many callbacks etc., however I thought I would see if you can see what I am missing.

I am trying to have a flow similar to this:

async.parallel([

function(callback){
        FetchData1(callback);
},

function(callback){
    async.waterfall([
        function(callback2){
            FetchData2(callback2)
        },
        function(arg1, arg2, callback2){
             FetchData3(arg1, arg2,callback2);
        }

    ],function(err, results){ 
        callback(null, results);
    });

}],function(err, results){

// run export methods after all fetch calls are done

});

Each of the "FetchData" calls query some webservice and parse the data from it using xml2js. The issue is definitely that there are things happening asynchronously within these calls, but I cannot seem to get it to work correctly no matter what I do.

Is there a way to force waterfall to wait until everything is completely done?

I'm pretty sure the issue is in the second fetch that looks something like:

function FetchData2(arg1, arg2, callback2) {

db.collection('collec', function (err, collection) {

    var stream = collection.find({"Week": weekNumber}).streamRecords();

    stream.on('data', function(doc){

        var parser = new xml2js.Parser({trim: false,normalize: false,emptyTag: '', explicitRoot:true});

        parser.addListener('end', function(result) {

            for(var i = 0; i < max; i++){   // save to db   }

        });

        //
        // get data and then call parser.parseString here
        //

    });

    stream.on('end',function(){

        callback2(null,'done');

    });

});

}