使用Wicket 6.19时出现以下错误：
RewriteRule ^files/page/([a-zA-Z0-9\-]+)?$ myPage.html#$1 [NE,NC,L]
代码：
Caused by: org.apache.wicket.core.util.objects.checker.CheckingObjectOutputStream$ObjectCheckException: Not detached model found!
A problem occurred while checking object with type: com.test.web.components.CurrentUserModel
Field hierarchy is:
[class=com.test.web.base.pages.HomePage, path=0]
private java.lang.Object org.apache.wicket.MarkupContainer.children [class=[Ljava.lang.Object;]
java.lang.Object org.apache.wicket.Component.data[1] [class=com.test.web.HeaderPanel, path=0:headerPanel]
private java.lang.Object org.apache.wicket.MarkupContainer.children [class=[Ljava.lang.Object;]
private java.lang.String org.apache.wicket.markup.html.image.resource.LocalizedImageResource.variation[2] [class=com.test.web.LoginStatusPanel, path=0:headerPanel:loginStatusPanel]
java.lang.Object org.apache.wicket.Component.data [class=com.test.web.components.CurrentUserModel] <----- field that is causing the problem
注意：如果我使用以下内容更新标记为“第1行”的注释中的代码：
@RequireHttps
public class HomePage extends WebPage {
private HeaderPanel headerPanel;
private LoginStatusPanel loginStatusPanel;
private MenuPanel menuPanel;
public HomePage(String id) {
super();
initialize();
}
public HomePage(String id, PageParameters parameters) {
super(parameters);
initialize();
}
@Override
protected void onInitialize() {
Request request = RequestCycle.get().getRequest();
if (request instanceof ServletWebRequest)
{
ServletWebRequest wr = (ServletWebRequest) request;
HttpSession session = wr.getContainerRequest().getSession();
if (session != null) {
}
}
super.onInitialize();
}
public String getApplicationId(){
return applicationId;
}
private void initialize() {
add(headerPanel = new HeaderPanel("headerPanel"));
headerPanel.add(loginStatusPanel = new LoginStatusPanel("loginStatusPanel"));
headerPanel.add(menuPanel = new MenuPanel("menuPanel"));
}
}
public class HeaderPanel extends Panel {
private Label headerTitleLbl;
public HeaderPanel(String id) {
super(id);
add(headerTitleLbl=new Label("headerTitle", WebApplication.getAppTitle()));
headerTitleLbl.setOutputMarkupId(true);
}
}
public class LoginStatusPanel extends Panel {
public LoginStatusPanel(String id) {
super(id, new CurrentUserModel()); // Line 1
}
protected void onInitialize() {
IModel<Authentication> authModel = (IModel<Authentication>) getDefaultModel();
final Authentication auth = authModel.getObject();
if (auth != null && auth.isAuthenticated() && !(auth instanceof AnonymousAuthenticationToken))
{
Fragment fragment = new Fragment("frag", "loggedInFragment", this);
Label status;
fragment.add(status = new Label("status", "Logged in as "));
fragment.add(new Label("userId", new PropertyModel<String>(authModel, "name")));
add(fragment);
}
else
{
Fragment fragment = new Fragment("frag", "loggedOutFragment", this);
fragment.add(new Label("status", "Logged out"));
fragment.add(new ExternalLink("login", "/LoginPage", "Log In"));
add(fragment);
}
super.onInitialize();
}
}
public class MenuPanel extends Panel {
public MenuPanel(String id) {
super(id);
add(new MenuPanel("menu", WebApplication.getMenuList()));
}
}
public class CurrentUserModel extends LoadableDetachableModel<Authentication> {
protected Authentication load() {
return SecurityContextHolder.getContext().getAuthentication();
}
}
错误未显示，可能是因为它不是LoadableDetachableModel。
是否可以将LoadableDetachableModel的实例传递给Component类构造函数？
我也遇到以下代码的相同错误：
super(id, new Model(SecurityContextHolder.getContext().getAuthentication()));
其中state是以下类的实例：
tree = new NestedTree<TreeItem>("tree", provider, state);
错误如下：
private class TreeItemExpansionModel extends LoadableDetachableModel<Set<TreeItem>>
{
private static final long serialVersionUID = 1L;
private final String treePanelId;
public TreeItemExpansionModel(String treePanelId) {
this.treePanelId = treePanelId;
}
@Override
protected Set<TreeItem> load() {
return TreeItemExpansion.get(treePanelId);
}
@Override
public boolean equals(Object obj) {
if (obj instanceof TreeItemExpansionModel) {
return ((TreeItemExpansionModel) obj).treePanelId.equals(treePanelId);
}
return false;
}
@Override
public int hashCode() {
return treePanelId.hashCode();
}
}
提前致谢。
答案 0 :(得分：2)
问题在于序列化检查器与模型生命周期管理的结合。
当您放置LoadableDetachableModel并初始化非Serializable的模型时，Wicket检查程序会抛出一个异常，您尝试序列化不可序列化的数据。这种行为是正确的。
发生这种情况的原因是
请参阅 NotDetachedModelChecker https://github.com/apache/wicket/blob/build/wicket-6.20.0/wicket-core/src/main/java/org/apache/wicket/core/util/objects/checker/NotDetachedModelChecker.java
建议修复：
我。使用 AbstractReadOnlyModel 代替LoadableDetachableModel
public class CurrentUserModel extends AbstractReadOnlyModel<Authentication> {
protected Authentication getObject() {
return SecurityContextHolder.getContext().getAuthentication();
}
}
如果你真的需要保留这个值（我认为这不是必需的，因为Spring身份验证上下文在每次尝试时都会返回相同的值），请使用AbstractReadOnlyModel包装LoadableDetachbleModel。
II。分离模型：在将流控制返回Wicket之前调用 authModel.detach（）;
protected void onInitialize() {
IModel<Authentication> authModel = (IModel<Authentication>) getDefaultModel();
final Authentication auth = authModel.getObject();
if (auth != null && auth.isAuthenticated() && !(auth instanceof AnonymousAuthenticationToken))
{
Fragment fragment = new Fragment("frag", "loggedInFragment", this);
Label status;
fragment.add(status = new Label("status", "Logged in as "));
fragment.add(new Label("userId", new PropertyModel<String>(authModel, "name")));
add(fragment);
}
else
{
Fragment fragment = new Fragment("frag", "loggedOutFragment", this);
fragment.add(new Label("status", "Logged out"));
fragment.add(new ExternalLink("login", "/LoginPage", "Log In"));
add(fragment);
}
authModel.detach();
super.onInitialize();
}
答案 1 :(得分：-1)