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| |
| <page> |
| <content> |
| <p> |
| The bean editor application uses Cocoon Forms, Pipelines and |
| Flow to edit a simple data structure modeled by Java objects. |
| </p> |
| <p> |
| As such, it is a good example of how a Cocoon front-end can be used to manipulate business |
| objects implemented in Java. |
| </p> |
| <p> |
| You will notice that the Java objects have nothing to do with Cocoon in our case. They are |
| completely independent of any Cocoon libraries. This is one of the options for implementing |
| the business layer of your application, useful when you have legacy business layer code to |
| integrate. |
| </p> |
| <p> |
| Our Java beans are trivial and uninteresting: what we're looking for is an understanding of |
| how Cocoon Pipelines, Forms and Flow play together with Java code, and for this a very simple |
| application is certainly good. |
| </p> |
| <p> |
| After studying this application, you will see that very little code had to be written to |
| implement an already capable system. As is often the case with a modular system like Cocoon, |
| the hard part is not having to write a lot of code, but rather finding where to write the |
| small amounts of code that are needed. |
| </p> |
| |
| <h2>Use cases</h2> |
| <p> |
| To keep it simple and focused, this application does just three things: |
| <ol> |
| <li>Display a list of <em>tasks</em>, units of work assigned to somebody and containing dated comments</li> |
| <li>Display a single <em>task</em> with its comments</li> |
| <li>Edit a single <em>task</em>, allowing comments to be added and removed</li> |
| </ol> |
| New tasks cannot be created, and tasks cannot be deleted. |
| </p> |
| <p> |
| The application is obviously incomplete, but shows many interesting features of the Cocoon Forms, |
| and their interplay with the Cocoon components that we already know. |
| </p> |
| <h2>Running the application</h2> |
| <p> |
| To run the bean editor application, Cocoon must be able to load the required Java classes. |
| </p> |
| <p> |
| If you're running this tutorial from the standard Cocoon distribution this should be |
| taken care of already, as the required classes are copied into the <em>webapp/WEB-INF/lib</em> |
| directory automatically during the build. |
| </p> |
| <p> |
| When you start using your own Java classes with Cocoon, you'll have to take care of this yourself, |
| usually by making sure the required jar files are copied in the right place. |
| </p> |
| <p> |
| For now, you can start the application from |
| <a href="../">this link</a>. |
| </p> |
| |
| </content> |
| </page> |