@Override
public void uninstall(LocalExtension localExtension, String namespace) throws UninstallException {
ExtensionURLClassLoader classLoader =
this.jarExtensionClassLoader.getURLClassLoader(namespace, false);
if (namespace == null || classLoader.getWiki().equals(namespace)) {
// unregister components
unloadComponents(localExtension.getFile(), classLoader);
// TODO: find a way to unload the jar from the classloader
}
}
@Override
public void install(LocalExtension localExtension, String namespace) throws InstallException {
ExtensionURLClassLoader classLoader =
this.jarExtensionClassLoader.getURLClassLoader(namespace, true);
// 1) load jar into classloader
try {
classLoader.addURL(localExtension.getFile().toURI().toURL());
} catch (MalformedURLException e) {
throw new InstallException("Failed to load jar file", e);
}
// 2) load and register components
loadComponents(localExtension.getFile(), classLoader);
}
private void unloadComponents(File jarFile, ExtensionURLClassLoader classLoader)
throws UninstallException {
try {
List<ComponentDeclaration> componentDeclarations = getDeclaredComponents(jarFile);
if (componentDeclarations == null) {
this.logger.debug("[{}] does not contain any component", jarFile);
return;
}
for (ComponentDeclaration componentDeclaration : componentDeclarations) {
try {
for (ComponentDescriptor componentDescriptor :
this.jarLoader.getComponentsDescriptors(
classLoader.loadClass(componentDeclaration.getImplementationClassName()))) {
this.componentManager.unregisterComponent(
componentDescriptor.getRole(), componentDescriptor.getRoleHint());
}
} catch (ClassNotFoundException e) {
this.logger.error(
"Failed to load class [{}]", componentDeclaration.getImplementationClassName(), e);
}
}
} catch (Exception e) {
throw new UninstallException("Failed to load jar file components", e);
}
}
