Copyright Since 2005 ColdBox Platform by Luis Majano and Ortus Solutions, Corp
www.coldbox.org | www.ortussolutions.com

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Welcome to cbJavaLoader 🚀

This module allows your ColdBox applications to class load different Java classes and libraries at runtime. On Adobe ColdFusion and Lucee it uses the bundled JavaLoader project. On BoxLang 1.8.0+ it uses BoxLang's native request class loader while keeping the same loader@cbjavaloader facade and javaloader: WireBox DSL.

License

Apache License, Version 2.0.

Important Links

• Repository: https://github.com/coldbox-modules/cbjavaloader
• ForgeBox: https://forgebox.io/view/cbjavaloader
• Docs: https://github.com/Ortus-Solutions/JavaLoader
• Changelog

Why cbJavaLoader

• Unified API for Java class loading across BoxLang, Lucee, and Adobe ColdFusion.
• WireBox integration via both loader@cbjavaloader mapping and the javaloader: DSL.
• Runtime-aware behavior with native BoxLang loading and JavaLoader compatibility on legacy runtimes.

System Requirements

• BoxLang 1.8.0+
• Lucee 5+
• Adobe ColdFusion 2023+

Quick Install ⚡

Just drop into your modules folder or use the box-cli to install

box install cbjavaloader

The module has a default folder called lib where any jars you drop there will be class loaded automatically. However, we recommend using the loadpaths setting for selecting an array of locations to class load, so when the module updates you won't lose those files.

On BoxLang 1.8.0+, those configured paths are added to the native request class loader. On Adobe ColdFusion and Lucee, they continue to be loaded through JavaLoader.

Quick Start ✅

1. Install the module with box install cbjavaloader.
2. Configure moduleSettings.cbJavaLoader.loadPaths in your app's ColdBox.cfc.
3. Inject loader@cbjavaloader or use inject="javaloader:YourClass".
4. Call create( "YourClass" ) and initialize your Java object as needed.

Loader API

The module registers the following mapping in WireBox: loader@cbjavaloader. This is the facade you will use to class load, append paths, and inspect the active class loader. The main methods are:

• create( class ) - Create a loaded Java class
• appendPaths( dirPath, filter ) - Appends a directory path of *.jar or *.class files to the current class loader.
• getLoadedURLs() - Get all the loaded URLs
• getURLClassLoader() - Get the active class loader implementation
• getVersion() - Get the JavaLoader facade version

Runtime Behavior

• BoxLang 1.8.0+: loader@cbjavaloader uses the native request class loader. setup() and appendPaths() call addPaths(), and create() resolves classes with createObject( "java", className, getRequestClassLoader() ).
• Adobe ColdFusion and Lucee: the module keeps using the bundled JavaLoader instance stored in server scope, including the legacy cfcdynamicproxy.jar support jar.
• Because of that runtime split, getLoadedURLs() will usually report fewer entries on BoxLang than on Adobe ColdFusion or Lucee for the same configuration.

WireBox DSL

The module also registers a new WireBox DSL called javaloader. You can then use this custom DSL for injecting Java classes easily:

property name="name"  inject="javaloader:{class-path}";
property name="hello" inject="javaloader:HelloWorld";
property name="buffer" inject="javaloader:org.class.path.StringBuffer";

Settings

Here are the module settings you can place in your ColdBox.cfc under an moduleSettings.cbJavaLoader structure:

moduleSettings = {
	cbJavaLoader = {
		// A single path, and array of paths or a single Jar
		loadPaths = [],
		// Load ColdFusion classes with loader (JavaLoader runtimes only)
		loadColdFusionClassPath = false,
		// Attach a custom class loader as a parent (JavaLoader runtimes only)
		parentClassLoader = "",
		// Directories that contain Java source code that are to be dynamically compiled (JavaLoader runtimes only)
		sourceDirectories = [],
		// the directory to build the .jar file for dynamic compilation in, defaults to ./tmp (JavaLoader runtimes only)
		compileDirectory = "models/javaloader/tmp",
		// Whether or not the source is trusted, i.e. it is going to change? Defaults to false, so changes will be recompiled and loaded (JavaLoader runtimes only)
		trustedSource = false
	}
};

In BoxLang native mode, loadPaths is the primary setting used by the loader facade. The remaining compilation and parent-loader settings continue to apply to the JavaLoader-backed Adobe ColdFusion and Lucee path.

Troubleshooting 🛠️

• If dynamic compilation fails on Adobe ColdFusion or Lucee, verify your JVM exposes compiler classes (tools.jar / JDK compiler availability).
• If classes are not found, confirm your loadPaths entries point to valid jars or directories.
• Use getLoadedURLs() to inspect what the active class loader has loaded at runtime.

Below is a simple example:

/**
* My Event Handler Hint
*/
component{
	// Inject JavaLoader
	property name="javaloader" inject="loader@cbjavaloader";

	// Index
	any function index( event,rc, prc ){
		// create a java class
		prc.hello = javaloader.create( "HelloWorld" ).init().hello();
	}

	// Run on first init
	any function onAppInit( event, rc, prc ){
		// on application start, load up more jars
		javaloader.appendPaths( getSetting( "ApplicationPath" ) & "jars" );
	}

}

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Copyright Since 2005 ColdBox Framework by Luis Majano and Ortus Solutions, Corp www.ortussolutions.com

HONOR GOES TO GOD ABOVE ALL

Because of His grace, this project exists. If you don't like this, then don't read it, its not for you.

"Therefore being justified by faith, we have peace with God through our Lord Jesus Christ: By whom also we have access by faith into this grace wherein we stand, and rejoice in hope of the glory of God. And not only so, but we glory in tribulations also: knowing that tribulation worketh patience; And patience, experience; and experience, hope: And hope maketh not ashamed; because the love of God is shed abroad in our hearts by the Holy Ghost which is given unto us. ." Romans 5:5

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