CUBA Platform Component - DB-Update Wizard

This application component can be used for creating one-off custom DB updates that should be executed by the administrator through the UI.

For normal / small-delta changes of the DB, the default CUBA DB-update scripts mechanisms should be used. But sometimes there are migrations from an existing database schema from another framework e.g, which are hard to do through the default mechanisms. This is where this application components comes into play.

Installation

1. Add the following maven repository https://dl.bintray.com/mariodavid/cuba-components to the build.gradle of your CUBA application:

   buildscript {

    //...
    
    repositories {
    
        // ...
    
        maven {
            url  "https://dl.bintray.com/mariodavid/cuba-components"
        }
    }
    
    // ...
   

   }

2. Select a version of the add-on which is compatible with the platform version used in your project:

Platform Version	Add-on Version
6.6.x	0.2.x
6.5.x	0.1.x

The latest version is:

Add custom application component to your project:

• Artifact group: de.diedavids.cuba.dbupdatewizard
• Artifact name: db-update-wizard-global
• Version: add-on version

Usage

To create a custom DB-Update in your code, where you want to connect to another Database or doing some other crazy stuff, that is not really possible through the normal Update scripts of CUBA, you can create a class in your application that will extend DefaultDbUpdateWizardService like this:

class MyCustomDbUpdateWizardServiceBean extends DefaultDbUpdateWizardServiceBean {

    @Override
    public boolean isUpdateAvaliable() {
        return true;
    }

    @Override
    public String getDbUpdateWizardStartMessage() {
        return "my start message";
    }

    @Override
    public Collection<Message> validatePreconditions() {
        // do pre-condition checks and return a Collection of Messages that will be displayed in the UI
        // If it contains a Message with MessageType.ERROR, the UI will not allow the user to proceed
        
        return null;
    }

    @Override
    public Collection<Message> executeUpdate() {
        // do the actual update and return a Collection of Messages that will be displayed in the UI
        
        return null;
    }
}

In order to make the db wizard aware of your bean, you have to register it in the spring.xml of the core module of your application like this:

 <bean id="ddcduw_DbUpdateWizardService" class="com.company.myapp.core.MyCustomDbUpdateWizardServiceBean" />

DB Update Wizard

The UI that the User can use to run the custom DB Update is placed under "Administration" > "DB-Update Wizard".