construct async chains.
var ch = new Chains({
//object of async functions
method1: function (arg1,arg2, callback) {},
method2: function (arg1,arg2, callback) {}
})
then call methods like this:
ch.method1(1,2).method2(3,4).done(function (){
called when all the commands are done.
})
an instance of Chain is an event emitter.
It will emit the callback args of every async called.
The events are the names of the methods. Also, you can pass callbacks in the usual way.
if a method calls back with an argument in the first slot Chain will emit 'error'
also, an Chains emits a 'change' event, that emits the same arguments as the normal event, but with the event name as the first argument.
conventions
async-chains depends on some strict conventions.
- no varible arguments. the number of arguments will be asserted.
- callback must be last.
- functions may refur to
this. this will be theChaininstance