Perform a single server call in lightning instead of multiple calls

Question

In the helper I have methods that each call an @AuraEnabled method in the component controller.

Some of these calls are only during the 'init' event. From a performance point of view I should make only one call during 'init'.

What is an elegant way of achieving this?

The methods called during 'init' return a list of strings, a decimal, and respectively a string.

Answer 1

Define a custom Apex class in your controller that encapsulates all of the information you wish to source in a single call from your init event:

public class InitializationWrapper {
    @AuraEnabled 
    public List<String> myStringList {get; set;}
    @AuraEnabled 
    public Decimal myDecimal {get; set;}
    @AuraEnabled 
    public String myString {get; set;}
}

The, return an instance of this wrapper class from your server-side Apex call to your init handler. You only need to make a single round-trip.