The projects sample-step1 to sample-step7 in this directory show how to implement a login process as a UPE application. Each subproject can be compiled, but it is not necessarily green.
See the READMEs in the subprojects for further details. Here is an overview.
Defines a simple login process with a user and password field and an unimplemented login action.
It defines a set of JUnit tests to check several validations. These tests are red, and to greenifying them is the task of the next steps.
This project adds mandatory validations to the login process to get the first tests green.
This project shows how to implement a rule to enable the login action when all data is filled in and no errors are in the login process. It then allows the login action.
This should turn another test to green.
This project calls some Backend in the actLogin action and queues an error message for the user if login does not succeed.
If the login succeeds, it jumps to a HelloWorld process showing the username.
This project adds an actRegistration action to the login process, which will call a simple registration process. If the process returns, the newly registered user should be able to do a login.
It shows how a process can call another process, send data to the subprocess and receive data on return. The registration subprocess does not define its fields on its own. It scaffolds a user-DTO. This project shows how to scaffold a DTO to a process and map data when saving or loading from the backend.
It also shows a complete JUnit test for the whole application.
The final step binds the application to a UI.