Vaadin 24 - How To Use Login Project in Multiple Other Vaadin Projects

Question

I have a Vaadin 24 LOGIN project that works great. It accesses the database, does all the Spring Security goodness and then goes to the default route ("/").

I have another Vaadin project that has an ADMIN UI that allows the user to perform CRUD commands for managing the users.

I have a third Vaadin project the performs some BUSINESS function.

All the applications are working GREAT by themselves.

I want to be able to use the LOGIN application in both the ADMIN and BUSINESS applications - so I don't have to copy all the same login code into both projects.

In my LOGIN application I've modified the build in the POM so that it will build two jar files - the "fat" executable and the "thin" non-executable:

<!-- UPDATED MAVEN TO CREATE 2 JARS, ONE EXECUTABLE AND ONE "PLAIN" -->
<plugin>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-maven-plugin</artifactId>
    <executions>
        <execution>
            <id>build information</id>
            <goals>
                <goal>build-info</goal>
            </goals>
        </execution>
        <execution>
            <id>repackage</id>
            <configuration>
                <classifier>exec</classifier>
            </configuration>
        </execution>
    </executions>
</plugin>

I also removed the AppShellConfigurator from the main class in the LOGIN application.

I then made the LOGIN jar a dependency in the ADMIN application.

The part where I get stuck:

1. How do I "trigger" the LoginView that lives in the LOGIN project from the ADMIN application?

2. Once a successful login has been accepted - will it just redirect to the "/" of whatever main applicatin (e.g. ADMIN or BUSINESS) specifies or ?

Answer 1

Vaadin scans by default all packages below your @SpringBootApplication for Routes, Components and other configurations.

To let Vaadin find and automatically register your LoginView that resides in another package you have to add the package to the @EnableVaadin annotation.

Example:

@EnableVaadin(value = {"com.example.login", "com.example.app"})
@SpringBootApplication
public class Application {

    public static void main(String[] args) {
        SpringApplication.run(Application.class, args);
    }
}

More information can be found in the official documentation.