JarCasting
RapidPM Vaadin Component - Login
A simple Login Screen - boring but usefull ;-) This is for Vaadin 10, build on a JDK10 but with
<maven.compiler.target>1.8</maven.compiler.target>
<maven.compiler.source>1.8</maven.compiler.source>
Why?
A Login Screen is often used, and a repetive task to create if you are creating smaller apps, demos, and so on.
For this I created the component, da work with dependencies instead of copy-paste. even in my examples.
How it looks like ?
How?
You can use this as a dependency. The only thing you have to do is to create the the connection to your app.
Step 1 - connect to your Auth - Service
The first method to create is the method with the name public abstract boolean checkCredentials();
Here you have to decide if the provided credentials are valid or not. In the demo/test Source folder you will find the class MyLoginView The implementation in this class is for demo usage only.
@Override
public boolean checkCredentials() {
String username = username();
String password = password();
// USE Apache Shiro for example : demo you can find here
// https://github.com/Nano-Vaadin-Demos/nano-vaadin-meecrowave-shiro-V10
// DON NOT USE THIS IN PRODUCTION !!
boolean isOK = username != null && username.equals("admin") ||
password != null && password.equals("admin");
UI.getCurrent().getSession().setAttribute(LOGGED_IN, isOK);
// DON NOT USE THIS IN PRODUCTION !!
return isOK;
}
Step 2 - what to do if auth failed
Define what should happen if the Auth-Service will reject the provided credentials. In this example there will be a Notification shown and a logger message created.
@Override
public void reactOnFailedLogin() {
logger().warning("Login is not acctepd..");
Notification.show("Credentials not accepted..");
}
Step 3 - what to do if auth is OK
Now we can redirect to the next View. In this example a demo view with no special meaning.
@Override
public void navigateToApp() {
UI.getCurrent().navigate(MainView.class);
}
Demo Usage
In the test folders you will find a fully working demo app to show a dummy implementation. If you want to see samo more examples, for example how to use this with Shiro, have a look at https://github.com/Nano-Vaadin-Demos/nano-vaadin-meecrowave-shiro-V10
ROADMAP
- I18n will be added
- TDD / PageObjects based on Testbench NG and jUnit5
How to connect?
Feel free to ping me ..
- email sven.ruppert (a) gmail.com
- Twitter - @SvenRuppert
