无法从具有PF4J、PF4J-Spring和Wicket的应用程序上下文接收具体bean

Question

我正在使用Wicket和PF4J制作一个spring boot应用程序。我想在我的插件中使用spring服务。这些服务没有使用插件类加载器之外的服务。在我的插件中，我可以使用wicket面板。panel类可以使用Spring服务。

下面是插件的类：

public class MyPlugin extends SpringPlugin implements MyPluginConfiguration {

    public MyPlugin(PluginWrapper wrapper) {
        super(wrapper);
    }

    @Override
    protected ApplicationContext createApplicationContext() {
        final AnnotationConfigApplicationContext applicationContext = new AnnotationConfigApplicationContext();
        applicationContext.setClassLoader(getWrapper().getPluginClassLoader());
        applicationContext.register(SpringConfiguration.class);
        applicationContext.refresh();
        return applicationContext;
    }

    @Override
    public Panel getConfigurationPanel(String wicketId) {
        return new ConfigurationPanel(wicketId);
    }

}

它的接口：

public interface MyPluginConfiguration {

    Panel getConfigurationPanel(String wicketId);
}

SpringConfiguration类：

@Configuration
public class SpringConfiguration {

    @Bean
    public LabelService getLabelService() {
        return new LabelService();
    }
}

配置面板：

public class ConfigurationPanel extends Panel {

    @SpringBean
    private LabelService labelService;

    public ConfigurationPanel(String id) {
        super(id);

        add(new Label("text", labelService.getLabel()));
    }

}

和服务：

@Service
public class LabelService {

    public String getLabel() {
        return "Hello World from the plugin.";
    }
}

为了显示配置，我在我的应用程序中使用了以下页面：

public class PluginTestPage extends WebPage {

    @SpringBean
    private PluginManager pluginManager;

    public PluginTestPage() {
        final PluginWrapper pluginWrapper = pluginManager.getPlugin("example");
        if (pluginWrapper.getPlugin() instanceof MyPluginConfiguration) {
            final MyPluginConfiguration pluginConfiguration = (MyPluginConfiguration) pluginWrapper.getPlugin();
            add(pluginConfiguration.getConfigurationPanel("configuration-panel"));
        } else {
            add(new Label("configuration-panel", "Can't get the configuration panel"));
        }
    }

}

当我询问PluginTestPage时，我得到了这个错误：

org.apache.wicket.WicketRuntimeException: Can't instantiate page using constructor 'public com.example.pages.PluginTestPage()'. An exception has been thrown during construction!
    at org.apache.wicket.session.DefaultPageFactory.newPage(DefaultPageFactory.java:194) ~[wicket-core-9.0.0.jar:9.0.0]
    at org.apache.wicket.session.DefaultPageFactory.newPage(DefaultPageFactory.java:67) ~[wicket-core-9.0.0.jar:9.0.0]
    at org.apache.wicket.DefaultMapperContext.newPageInstance(DefaultMapperContext.java:90) ~[wicket-core-9.0.0.jar:9.0.0]
    at org.apache.wicket.core.request.handler.PageProvider$Provision.getPage(PageProvider.java:369) ~[wicket-core-9.0.0.jar:9.0.0]
    at org.apache.wicket.core.request.handler.PageProvider.getPageInstance(PageProvider.java:170) ~[wicket-core-9.0.0.jar:9.0.0]
    at org.apache.wicket.request.handler.render.PageRenderer.getPage(PageRenderer.java:78) ~[wicket-core-9.0.0.jar:9.0.0]
    at org.apache.wicket.request.handler.render.WebPageRenderer.respond(WebPageRenderer.java:231) ~[wicket-core-9.0.0.jar:9.0.0]
    at org.apache.wicket.core.request.handler.RenderPageRequestHandler.respond(RenderPageRequestHandler.java:202) ~[wicket-core-9.0.0.jar:9.0.0]
    at org.apache.wicket.request.cycle.RequestCycle$HandlerExecutor.respond(RequestCycle.java:917) ~[wicket-core-9.0.0.jar:9.0.0]
    at org.apache.wicket.request.RequestHandlerExecutor.execute(RequestHandlerExecutor.java:63) ~[wicket-request-9.0.0.jar:9.0.0]
    at org.apache.wicket.request.cycle.RequestCycle.execute(RequestCycle.java:283) ~[wicket-core-9.0.0.jar:9.0.0]
    at org.apache.wicket.request.cycle.RequestCycle.processRequest(RequestCycle.java:254) ~[wicket-core-9.0.0.jar:9.0.0]
    at org.apache.wicket.request.cycle.RequestCycle.processRequestAndDetach(RequestCycle.java:222) ~[wicket-core-9.0.0.jar:9.0.0]
    at org.apache.wicket.protocol.http.WicketFilter.processRequestCycle(WicketFilter.java:276) ~[wicket-core-9.0.0.jar:9.0.0]
    at org.apache.wicket.protocol.http.WicketFilter.processRequest(WicketFilter.java:207) ~[wicket-core-9.0.0.jar:9.0.0]
    at org.apache.wicket.protocol.http.WicketFilter.doFilter(WicketFilter.java:300) ~[wicket-core-9.0.0.jar:9.0.0]
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[tomcat-embed-core-9.0.37.jar:9.0.37]
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-9.0.37.jar:9.0.37]
    at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:202) ~[tomcat-embed-core-9.0.37.jar:9.0.37]
    at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:96) ~[tomcat-embed-core-9.0.37.jar:9.0.37]
    at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:541) ~[tomcat-embed-core-9.0.37.jar:9.0.37]
    at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:139) ~[tomcat-embed-core-9.0.37.jar:9.0.37]
    at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:92) ~[tomcat-embed-core-9.0.37.jar:9.0.37]
    at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:74) ~[tomcat-embed-core-9.0.37.jar:9.0.37]
    at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:343) ~[tomcat-embed-core-9.0.37.jar:9.0.37]
    at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:373) ~[tomcat-embed-core-9.0.37.jar:9.0.37]
    at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:65) ~[tomcat-embed-core-9.0.37.jar:9.0.37]
    at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:868) ~[tomcat-embed-core-9.0.37.jar:9.0.37]
    at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1589) ~[tomcat-embed-core-9.0.37.jar:9.0.37]
    at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49) ~[tomcat-embed-core-9.0.37.jar:9.0.37]
    at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128) ~[na:na]
    at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628) ~[na:na]
    at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61) ~[tomcat-embed-core-9.0.37.jar:9.0.37]
    at java.base/java.lang.Thread.run(Thread.java:834) ~[na:na]
Caused by: java.lang.reflect.InvocationTargetException: null
    at java.base/jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) ~[na:na]
    at java.base/jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62) ~[na:na]
    at java.base/jdk.internal.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45) ~[na:na]
    at java.base/java.lang.reflect.Constructor.newInstance(Constructor.java:490) ~[na:na]
    at org.apache.wicket.session.DefaultPageFactory.newPage(DefaultPageFactory.java:175) ~[wicket-core-9.0.0.jar:9.0.0]
    ... 33 common frames omitted
Caused by: java.lang.IllegalStateException: Concrete bean could not be received from the application context for class: com.example.pf4j_wicket_spring.services.LabelService.
    at org.apache.wicket.spring.SpringBeanLocator.lookupSpringBean(SpringBeanLocator.java:277) ~[wicket-spring-9.0.0.jar:9.0.0]
    at org.apache.wicket.spring.SpringBeanLocator.locateProxyTarget(SpringBeanLocator.java:198) ~[wicket-spring-9.0.0.jar:9.0.0]
    at org.apache.wicket.spring.injection.annot.AnnotProxyFieldValueFactory.getFieldValue(AnnotProxyFieldValueFactory.java:150) ~[wicket-spring-9.0.0.jar:9.0.0]
    at org.apache.wicket.injection.Injector.inject(Injector.java:111) ~[wicket-ioc-9.0.0.jar:9.0.0]
    at org.apache.wicket.spring.injection.annot.SpringComponentInjector.inject(SpringComponentInjector.java:124) ~[wicket-spring-9.0.0.jar:9.0.0]
    at org.apache.wicket.spring.injection.annot.SpringComponentInjector.onInstantiation(SpringComponentInjector.java:130) ~[wicket-spring-9.0.0.jar:9.0.0]
    at org.apache.wicket.application.ComponentInstantiationListenerCollection$1.notify(ComponentInstantiationListenerCollection.java:38) ~[wicket-core-9.0.0.jar:9.0.0]
    at org.apache.wicket.application.ComponentInstantiationListenerCollection$1.notify(ComponentInstantiationListenerCollection.java:34) ~[wicket-core-9.0.0.jar:9.0.0]
    at org.apache.wicket.util.listener.ListenerCollection.notify(ListenerCollection.java:80) ~[wicket-util-9.0.0.jar:9.0.0]
    at org.apache.wicket.application.ComponentInstantiationListenerCollection.onInstantiation(ComponentInstantiationListenerCollection.java:33) ~[wicket-core-9.0.0.jar:9.0.0]
    at org.apache.wicket.Component.<init>(Component.java:682) ~[wicket-core-9.0.0.jar:9.0.0]
    at org.apache.wicket.MarkupContainer.<init>(MarkupContainer.java:185) ~[wicket-core-9.0.0.jar:9.0.0]
    at org.apache.wicket.markup.html.WebMarkupContainer.<init>(WebMarkupContainer.java:53) ~[wicket-core-9.0.0.jar:9.0.0]
    at org.apache.wicket.markup.html.WebMarkupContainer.<init>(WebMarkupContainer.java:45) ~[wicket-core-9.0.0.jar:9.0.0]
    at org.apache.wicket.markup.html.panel.Panel.<init>(Panel.java:67) ~[wicket-core-9.0.0.jar:9.0.0]
    at com.example.pf4j_wicket_spring.panels.ConfigurationPanel.<init>(ConfigurationPanel.java:25) ~[na:na]
    at com.example.pf4j_wicket_spring.MyPlugin.getConfigurationPanel(MyPlugin.java:40) ~[na:na]
    at com.example.pages.PluginTestPage.<init>(PluginTestPage.java:30) ~[classes/:na]
    ... 38 common frames omitted

问题的根源是什么？是我的设置错误还是pf4j-spring的bug？

向您致敬，Stef

Answer 1

正如您从堆栈跟踪中看到的，Wicket并不知道Spring配置。

Wicket并不知道PF4J和它的Spring集成。

您还需要将Wicket配置为使用SpringConfiguration。