com.vaadin.flow.server.osgi

Class OSGiAccess

java.lang.Object

com.vaadin.flow.server.osgi.OSGiAccess

public final class OSGiAccess
extends Object

Manages scanned classes inside OSGi conteiner.

It doesn't do anything outside of OSGi.

Author:

Vaadin Ltd

See Also:

getInstance()

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	OSGiAccess.OSGiServletContext This is internal class and is not intended to be used.

Method Summary

Modifier and Type	Method and Description
void	addScannedClasses(Map<Long,Collection<Class<?>>> extenderClasses) Adds scanned classes in active bundles.
static OSGiAccess	getInstance() Gets the singleton instance.
ServletContext	getOsgiServletContext() Gets a servlet context instance which is used to track registries which are storage of scanned classes.
boolean	hasInitializers() Checks whether the servlet initializers are discovered.
void	removeScannedClasses(Long bundleId) Removes classes from the bundle identified by the bundleId.
void	setServletContainerInitializers(Collection<Class<? extends ServletContainerInitializer>> contextInitializers) Sets the discovered servlet context initializer classes.

Methods inherited from class java.lang.Object

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

Method Detail

getInstance

public static OSGiAccess getInstance()

Gets the singleton instance.

Returns:

the singleton instance

getOsgiServletContext

public ServletContext getOsgiServletContext()

Gets a servlet context instance which is used to track registries which are storage of scanned classes.

This is not a real servlet context. It's just a proxied unique instance which is used to be able to access registries in a generic way via some getInstance(ServletContext) method.

Returns:

setServletContainerInitializers

public void setServletContainerInitializers(Collection<Class<? extends ServletContainerInitializer>> contextInitializers)

Sets the discovered servlet context initializer classes.

The OSGi bundle tracker is used to scan all classes in bundles and it also scans flow-server module for servlet initializer classes. They are set using this method once they are collected.

Parameters:

contextInitializers - servlet context initializer classes

hasInitializers

public boolean hasInitializers()

Checks whether the servlet initializers are discovered.

Returns:

true if servlet initializers are set, false otherwise

addScannedClasses

public void addScannedClasses(Map<Long,Collection<Class<?>>> extenderClasses)

Adds scanned classes in active bundles.

The map contains a bundle id as a key and classes discovered in the bundle as a value.

Parameters:

extenderClasses - a map with discovered classes in active bundles

removeScannedClasses

public void removeScannedClasses(Long bundleId)

Removes classes from the bundle identified by the bundleId.

When a bundle becomes inactive its classes should not be used anymore. This method removes the classes from the bundle from the collection of discovered classes.

Parameters:

bundleId - the bundle identifier