My First ColdBox Application

The coldbox create app command enables you to create application skeletons using one of our official skeletons or your own. Here are the names of the common ones you can find in our Github Organization:
  • Default: The default app template
  • Elixir : A ColdBox Elixir based template to do asset compilation for you
  • Rest: A RESTFul services template
  • Rest-hmvc: A RESTFul service built with modules
  • SuperSimple : The bare-bones template
  • Vite: The default template using VITE for asset bundling
You can find all our template skeletons here:
ColdBox Elixir
ColdBox Elixir Docs

Scaffolding Our Application

So let's create our first app using the default template skeleton:
coldbox create app Quickstart

File/Folder Conventions

Here are some of the major files and directory conventions you should know about:
Mappings and build tasks for VSCode
Docker helpers
The framework library
Configurations and module configurations
Event handler controllers
i18n, JavaScript, helpers, CSS
Event driven listeners go here
Application CFML layouts
Java libraries or third party libraries
Model objects
CommandBox driven dependencies
Custom applicaiton modules
Your application specs
Application CFML views
Here are the major files you should know about:
Loads the CFML Engine settings
Formatting rules
Linting rules
Environment variables (Never commit)
Example env file
Your application bootstrap
Your CommandBox package descriptor
Front placeholder file
CommandBox server control
Now let's start a server so we can see our application running:
server start
This will start up a Lucee 5 open-source CFML engine. If you would like an Adobe ColdFusion server then add to the command: cfengine=adobe@{version} where {version} can be: 2021,2018,2016.

Default Event

This command will start a server with URL rewrites enabled, open a web browser for you, and execute the index.cfm which in turn executes the default event by convention in a ColdBox application: main.index. This is now our first runtime convention!
Instead of executing pages like in a traditional application, we always execute the same page but distinguish the event we want via URL routing. When no mappings are present, we execute the default event by convention.
Tip: ColdBox Events map to handlers (cfc) and appropriate actions (functions)
Tip: The default event can also be changed in the configuration file: config/Coldbox.cfc
Hooray, we have scaffolded our first application, started a server, and executed the default event. Explore the application template generated, which contains useful information about your application.
Tip: Type coldbox create app help to get help on all the options for creating ColdBox applications.
Let's open the handler and see the code, so open handlers/main.cfc
component extends="coldbox.system.EventHandler" {
* Default Action
function index( event, rc, prc ){
prc.welcomeMessage = "Welcome to ColdBox!";
event.setView( "main/index" );
* Produce some restfulf data
function data( event, rc, prc ){
return [
{ "id" : createUUID(), "name" : "Luis" },
{ "id" : createUUID(), "name" : "Joe" },
{ "id" : createUUID(), "name" : "Bob" },
{ "id" : createUUID(), "name" : "Darth" }
* Relocation example
function doSomething( event, rc, prc ){
relocate( "main.index" );
* --------------------------------------------------------------------------
* Implicit Actions
* --------------------------------------------------------------------------
* All the implicit actions below MUST be declared in the config/Coldbox.cfc in order to fire.
function onAppInit( event, rc, prc ){
function onRequestStart( event, rc, prc ){
function onRequestEnd( event, rc, prc ){
function onSessionStart( event, rc, prc ){
function onSessionEnd( event, rc, prc ){
var sessionScope = event.getValue( "sessionReference" );
var applicationScope = event.getValue( "applicationReference" );
function onException( event, rc, prc ){
event.setHTTPHeader( statusCode = 500 );
// Grab Exception From private request collection, placed by ColdBox Exception Handling
var exception = prc.exception;
// Place exception handler below:
The action (function) we are interested in is the index() function.
function index( event, rc, prc ){
prc.welcomeMessage = "Welcome to ColdBox!";
event.setView( "main/index" );
It sets a message in an incoming prc argument and then calls a method in the incoming event argument to set a view for rendering. We will discover these arguments in the next section. For now, we need to understand that handler actions are in place of traditional CFML pages. Depending on the incoming URL route, we execute the appropriate handler and action function.

Re-initializing the Application

There will be times when you make configuration or metadata/singleton code changes that are not reflected immediately in the application due to caching. You can tell the framework to reinit or restart the application for you via the URL by leveraging the special URL variable fwreinit.
You can also use CommandBox to reinit the application:
coldbox reinit
Tip: You can add a password to the reinit procedures for further security, please see the configuration section.
Last modified 9mo ago