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Integrate Wonder Into an Existing Application

Version 12.1 by Kieran Kelleher on 2007/10/01 21:59

Introduction

So you have decided to take the plunge and take advantage of the many useful features of Project Wonder. The most common usage of Project Wonder is to simply integrate the Wonder foundation frameworks of ERJars, ERExtensions and JavaWOExtensions into your project. Doing this fixes many problems with the standard WebObjects frameworks and provides easy access to many configurable features that most typical WebObjects applications need.
In this short article, we itemize the absolute minimum to add Wonder to your project and avoid initial integration stumbles.

Minimum Wonder Integration

  • Add ERJars, ERExtensions and Wonder's JavaWOExtensions frameworks to your project's framework references
  • Remove existing log4j jar if your project had that.
  • Make it so your Application class subclasses ERXApplication
  • Make it so your Session class subclasses ERXSession
  • Make it so your DirectAction classes extend ERXDirectAction
  • Your Application class' main static method {+}must{+} call ERXApplication.main(...) instead of WOApplication.main(...). Your application will fail to initialize and launch otherwise.
  • Use ERXEC.newEditingContext() to create new editing contexts in your application
  • Add minimal content to Properties file. To get minimal content, create a temporary empty project using the WOnderApplication WOLips project template and copy/paste the contents from that template's Properties file.
Warning
Remember

All of these steps are important. Failing to integrate properly may lead to errors during runtime or your application will fail to launch successfully

Application main method

public static void main(String argv[]) {
        ERXApplication.main(argv, Application.class);
   }

Easy Recommended Extras

If you got the minimum Wonder integration done and your app is working, then adding these harmless but useful extra frameworks are definitely worthwhile:

  • ERPrototypes - save yourself lots of manhours fiddling with EOModel attributes by using convenient prototypes. This is considered best practice.
  • ERJavaMail - send all kinds of emails - plain text, html, multi-part, attachments, etc. HTML can be generated form a WOComponent or be set using a HTML String.
  • ERSelenium - functional testing that simulates user interaction with your app's web pages.
Success

Wonder source is in itself a very useful reference and gives insight into the inner workings of the WebObjects frameworks, so having the source directly linked to your project in your workspace has many advantages. See other tutorials on this wiki that show how to set that up.