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Lazy Properties
Wanna be lazy?
WireBox supports the concept of marking properties in your components as
lazy. This will allow the property to be constructed ONCE when requested ONLY (lazy loaded). This way, you can take advantage of the construction of the property being lazy-loaded for you. Please note that this is different than providers since in this case, you provide the function that will build the property and it can be anything you want.
Internally, we will generate a getter method for you that will make sure to construct your property via a builder function you will provide, lock the request (by default), store it in the
variables scope, and return it to you.Note: With lazy properties, you must use the getter only to retrieve the property ONLY!
component{
// Lazy property: Constructed by convention via the buildUtil() method
property name="util" lazy;
/**
* Build a util object lazyily.
* The first time you call it, it will lock, build it, and store it by convention as 'variables.util'
*/
function buildUtil(){
return new coldbox.system.core.util.Util();
}
}
When you tag a property as
lazy, we will look for a method using the following pattern by convention:function build{propertyName}(){}
We will lock, call the builder, store the property and return it.
If you want to use ANY method in your CFC to build the property, then use the value of the
lazy annotation to point to the public or private method that will build your property:component{
property name="data" lazy="constructData";
function constructData(){
return dataservice.buildStrongData();
}
}
By default, WireBox will lock the construction of the property. If you do not want the locking to occur, use the
LazyNoLock attribute. Just as before, if you don’t have a value for the annotation, we will look for a build{propertyName} function, or if it has a value, we will use that as the name of the builder function.component{
property name="util" lazyNoLock;
property name="util" lazyNoLock="constructUtil";
/**
* Build a util object lazyily.
* The first time you call it, build it, and store it by convention as 'variables.util'
*/
function buildUtil(){
return new coldbox.system.core.util.Util();
}
function constructUtil(){
return new coldbox.system.core.util.Util();
}
}