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Enterprise-app for Vaadin

·314 words·2 mins
Vaadin News
Alejandro Duarte
Alejandro Duarte
Alejandro Duarte is a Software Engineer, published author, and award winner. He currently works for MariaDB plc as a Developer Relations Engineer. Starting his coding journey at 13 with BASIC on a rudimentary black screen, Alejandro quickly transitioned to C, C++, and Java during his academic years at the National University of Colombia. Relocating first to the UK and then to Finland, Alejandro deepened his involvement in the open-source community. He’s a recognized figure in Java circles, credited with articles and videos amassing millions of views, and presentations at international events.

Some years ago I published the Enterprise-app add-on for Vaadin. The most awarded feature was the CrudComponent class that allowed you could add a CRUD-like interface to any Hibernate entity by writing one line of code. Enterprise-app was (and still is) available for Vaadin 6. I partially migrated it to Vaadin 7, but never really completed the task.

I’m not longer supporting the Enterprise-app add-on, but working in a set of new Vaadin add-ons to replace parts of its functionality. So far I have implemented the Crud UI add-on, with a less magical but much more flexible CrudComponent. A key difference with the old one is that it doesn’t perform the actual CRUD operations, instead, it delegates the operations to a CrudListener with 4 methods that you have to implement (or alternatively, use 4 separte interfaces and lambda expressions or method references). This allows you to use any persistence technology you want.

Suppose you have a JavaBean like the following:

public class User {
    private Long id;
    private String name;
    private Date birthDate;
    private String email;
    private String password;

    ... getters & setters ...

And a “backend” service class like the following:

public class Backend {
    Collection<User> findAll() { ... }
    User add(User user) { ... }
    User update(User user) { ... }
    void delete(User user) { ... }

Then, with the Crud UI add-on, you can create a CRUD web interface with the following code:

GridBasedCrudComponent<User> crud = new GridBasedCrudComponent<>(User.class);
crud.setFindAllOperation(() -> backend.findAll());

There are several configuration options. See the examples on the add-on’s page. The following is an example of a CrudComponent with modified configuration settings for Grid’s columns, field captions, layout, and validations:

Crud UI add-on for Vaadin

If you were a user of Enterprise-app, take a look at the new Crud UI add-on and let me know any issues you find or features you would like to have.

Happy coding!


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