var http = require('http');
var server = http.createServer(req,resp) {
var finalVal = "";
consumer.on('message',function(message) {
finalVal = message;
console.log(finalVal);
if(isRealyTheFinalMessage())
resp.end(finalVal);
});
});
Am Mittwoch, 13. August 2014 04:55:28 UTC+2 schrieb Pradeep Simha:
>
> My situation is like this, I have a server like this and inside I am
> calling another callback function which gets multiple values:
>
> var http = require('http');
> var server = http.createServer(req,resp) {
> var finalVal = "";
>
> consumer.on('message',function(message) {
> finalVal = message;
> console.log(finalVal);
> });
>
> resp.end(finalVal);
> });
>
> My finalVal should display all the multiple values it fetches and send it
> as a response, but problem is it's sending only first value where as
> console.log displays all the values. I do understand that by the time
> consumer.on ends response would have committed. Can someone please help me
> how to handle this scenario since I'm very new to Node.js ? Currently due
> to heavy deadlines I don't have time to read full information about
> callbacks. But defnitely I would take time to learn about callbacks.
>
> Here `consumer.on` calls multiple times till it fetches all the data from
> backend, I need to send all those data in a final response. I am using
> `node-kafka` to consume to kafka messages.
>
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