import com.mendix.systemwideinterfaces.core.UserAction; //导入依赖的package包/类
public static <T> T withSessionCache(IContext c, final Function<T> worker) throws Exception {
	try {
		return Core.executeSync(new UserAction<T>(c) {

			@Override
			public T executeAction() throws Exception {
				return worker.apply();
			}
		});
	}
	catch (Exception e) {
		//executeSync wraps all thrown exeption 2 times in a CoreRuntimeException, unwrap it...
		Throwable cause1 = e.getCause();
		if (cause1 == null || cause1.getCause() == null)
			throw e;
		else if (cause1.getCause() instanceof Exception)
			throw (Exception) cause1.getCause();
		else
			throw new RuntimeException(e);
	}
}
 

import com.mendix.systemwideinterfaces.core.UserAction; //导入依赖的package包/类
/**
 * Add the action specified by the given action name to action registry. This enables calling
 * <code>Core.execute(actionName)</code> for this action.
 * @param actionName the fully qualified class name of the action (e.g. com.mendix.action.MyAction).
 */
public static void addUserAction(Class<? extends UserAction<?>> userActionClass) 
{
	component.core().addUserAction(userActionClass);
}