com.vaadin.flow.server.startup

Interface ClassLoaderAwareServletContainerInitializer

All Superinterfaces:

javax.servlet.ServletContainerInitializer

All Known Subinterfaces:

VaadinServletContextStartupInitializer

All Known Implementing Classes:

AnnotationValidator, ConnectEndpointsValidator, DevModeInitializer, ErrorNavigationTargetInitializer, LookupServletContainerInitializer, RouteRegistryInitializer, ServletVerifier, VaadinAppShellInitializer, WebComponentConfigurationRegistryInitializer, WebComponentExporterAwareValidator

public interface ClassLoaderAwareServletContainerInitializer
extends javax.servlet.ServletContainerInitializer

Allows to load the implementation class by one classloader but accepts classes in onStartup(Set, ServletContext) method loaded by another classloader.

Workaround for https://github.com/vaadin/flow/issues/7805.

Author:

Vaadin Ltd

Method Summary

Modifier and Type	Method and Description
default void	onStartup(Set<Class<?>> set, javax.servlet.ServletContext context) Overridden to use different classloaders if needed.
void	process(Set<Class<?>> classSet, javax.servlet.ServletContext context) Implement this method instead of onStartup(Set, ServletContext) to handle classes accessible by different classloaders.
default boolean	requiresLookup() Whether this initializer requires lookup or not.

Method Detail

onStartup

default void onStartup(Set<Class<?>> set,
                       javax.servlet.ServletContext context)
                throws javax.servlet.ServletException

Overridden to use different classloaders if needed.

Specified by:

onStartup in interface javax.servlet.ServletContainerInitializer

Throws:

javax.servlet.ServletException

requiresLookup

default boolean requiresLookup()

Whether this initializer requires lookup or not.

Returns:

whether this initializer requires lookup

process

void process(Set<Class<?>> classSet,
             javax.servlet.ServletContext context)
      throws javax.servlet.ServletException

Implement this method instead of onStartup(Set, ServletContext) to handle classes accessible by different classloaders.

Parameters:

classSet - the Set of application classes that extend, implement, or have been annotated with the class types specified by the HandlesTypes annotation, or null if there are no matches, or this ServletContainerInitializer has not been annotated with HandlesTypes

context - the ServletContext of the web application that is being started and in which the classes contained in classSet were found

Throws:

javax.servlet.ServletException - if an error has occurred

See Also:

onStartup(Set, ServletContext)