Package com.vaadin.flow.server.startup

Class BaseLicenseCheckerServiceInitListener

java.lang.Object

com.vaadin.flow.server.startup.BaseLicenseCheckerServiceInitListener

All Implemented Interfaces:

VaadinServiceInitListener, Serializable, EventListener

public abstract class BaseLicenseCheckerServiceInitListener
extends Object
implements VaadinServiceInitListener

Abstract base class implementing the VaadinServiceInitListener for initializing a license checking mechanism during the service initialization.

This class handles the validation of the license for a specific product and its version during the initialization of the Vaadin service. The license checking mechanism is performed only in development mode and in different modes depending on the availability of Vaadin dev tools.

With Vaadin dev tools enabled, if the license check fails because of missing license keys, handling is delegated to the Vaadin Dev Server so it can, for example, display the pre-trial splash screen. However, if dev tools are disabled, the License Checker will open the vaadin.com "Validate license" page in a browser window to let the user log in or register and then try to download a valid license.

Subclasses are expected to provide the product name and version required for the license validation by invoking the constructor of this class and to properly register the implementation for runtime discovery.

For internal use only. May be renamed or removed in a future release.

See Also:

• VaadinServiceInitListener
• Serialized Form

Constructor Summary

Constructors

Modifier	Constructor	Description
protected	BaseLicenseCheckerServiceInitListener(String productName, String productVersion)

Method Summary

Modifier and Type	Method	Description
void	serviceInit(ServiceInitEvent event)	Run when a VaadinService instance is initialized.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Details

BaseLicenseCheckerServiceInitListener

protected BaseLicenseCheckerServiceInitListener(String productName,
 String productVersion)

Method Details

serviceInit

public void serviceInit(ServiceInitEvent event)

Description copied from interface: VaadinServiceInitListener

Run when a VaadinService instance is initialized.

Specified by:

serviceInit in interface VaadinServiceInitListener

Parameters:

event - the service initialization event