Is it possible to create chained methods that are asynchronous like this in node.js
File.create('file.jpg').rename('renamed.jpg').append('Hello World')
That is to say non-blocking.
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If it's non-blocking, shouldn't there be a callback function passed in somewhere?Matthew Flaschen– Matthew Flaschen2010-11-08 06:31:05 +00:00Commented Nov 8, 2010 at 6:31
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@Matthew: Yeah it should. So I wonder if there is some way to create a method chaining that is asynch. Maybe with a library that could handle it automatically somehow.ajsie– ajsie2010-11-08 06:48:35 +00:00Commented Nov 8, 2010 at 6:48
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2 Answers
You basically want to abstract the asynchronous nature of the file-handling operations on your API.
It can be done, I would recommend you to give a look to the following article:
The article was written by Dustin Diaz, who currently works on the @anywhere JavaScript API, and he does exactly what you want, using a using a simple Queue implementation, a fluent interface can be created, being independent of any callback.
The asynchronicity is hidden and it is handled internally by your API, it's a nice and simple technique.
answered Nov 8, 2010 at 6:46
Christian C. Salvadó
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2 Comments
Colonel Panic
The @anywhere link is dead :(
Daithí
+1 for a library. I did come across github.com/FuturesJS/FuturesJS that has a
chainify API, but can't find info on how to use itSure, like any JavaScript, you just return an object that has that method.
One possible layout (among many).
var File = new (function()
{
this.create = function(str)
{
return this;
}
this.rename = function(str)
{
return this;
}
})();
1 Comment
ajsie
Sorry I forgot to tell you that the code has to be asynchronous in Node.js. I have edited the post.