2

私は、Glassfish 3.1.2 の JDK 1.6 で問題なくデプロイおよび実行される一連のコードを持っています。ただし、Glassfish 4 および JDK 1.7 に更新すると、アプリケーションをデプロイしようとすると次のエラーが発生します。

org.jboss.weld.exceptions.IllegalArgumentException: WELD-001407 Cannot declare an injection point with a type variable: [BackedAnnotatedField] @Inject protected com.co.ejb.web.AjaxGridServlet.sourceInstance 
at org.jboss.weld.manager.InjectionTargetFactoryImpl.createInjectionTarget(InjectionTargetFactoryImpl.java:82)
at org.jboss.weld.manager.InjectionTargetFactoryImpl.createInjectionTarget(InjectionTargetFactoryImpl.java:68)
at org.jboss.weld.manager.BeanManagerImpl.createInjectionTarget(BeanManagerImpl.java:1039)
at org.jboss.weld.manager.BeanManagerImpl.fireProcessInjectionTarget(BeanManagerImpl.java:1197)
at org.glassfish.weld.WeldDeployer.firePITEvent(WeldDeployer.java:390)
at org.glassfish.weld.WeldDeployer.fireProcessInjectionTargetEvents(WeldDeployer.java:360)
at org.glassfish.weld.WeldDeployer.event(WeldDeployer.java:212)
at org.glassfish.kernel.event.EventsImpl.send(EventsImpl.java:131)
at org.glassfish.internal.data.ApplicationInfo.load(ApplicationInfo.java:328)
at com.sun.enterprise.v3.server.ApplicationLifecycle.deploy(ApplicationLifecycle.java:493)
at com.sun.enterprise.v3.server.ApplicationLifecycle.deploy(ApplicationLifecycle.java:219)
at org.glassfish.deployment.admin.DeployCommand.execute(DeployCommand.java:491)
at com.sun.enterprise.v3.admin.CommandRunnerImpl$2.execute(CommandRunnerImpl.java:537)
at com.sun.enterprise.v3.admin.CommandRunnerImpl.doCommand(CommandRunnerImpl.java:546)
at com.sun.enterprise.v3.admin.CommandRunnerImpl.doCommand(CommandRunnerImpl.java:1423)
at com.sun.enterprise.v3.admin.CommandRunnerImpl.access$1500(CommandRunnerImpl.java:108)
at com.sun.enterprise.v3.admin.CommandRunnerImpl$ExecutionContext.execute(CommandRunnerImpl.java:1762)
at org.glassfish.deployment.autodeploy.AutoOperation.run(AutoOperation.java:164)
at org.glassfish.deployment.autodeploy.AutoDeployer.deploy(AutoDeployer.java:595)
at org.glassfish.deployment.autodeploy.AutoDeployer.deployAll(AutoDeployer.java:482)
at org.glassfish.deployment.autodeploy.AutoDeployer.run(AutoDeployer.java:410)
at org.glassfish.deployment.autodeploy.AutoDeployer.run(AutoDeployer.java:401)
at org.glassfish.deployment.autodeploy.AutoDeployService$1.run(AutoDeployService.java:233)
at java.util.TimerThread.mainLoop(Timer.java:555)
at java.util.TimerThread.run(Timer.java:505)
Caused by: org.jboss.weld.exceptions.DefinitionException: WELD-001407 Cannot declare an injection point with a type variable: [BackedAnnotatedField] @Inject protected com.co.ejb.web.AjaxGridServlet.sourceInstance
at org.jboss.weld.bootstrap.Validator.checkFacadeInjectionPoint(Validator.java:765)
at org.jboss.weld.bootstrap.Validator.validateInjectionPointForDefinitionErrors(Validator.java:352)
at org.jboss.weld.injection.producer.InjectionTargetService.validateProducer(InjectionTargetService.java:39)
at org.jboss.weld.manager.InjectionTargetFactoryImpl.createInjectionTarget(InjectionTargetFactoryImpl.java:79)
... 24 more

問題のファイルは次のとおりです。

BaseJasonサーブレット

public abstract class BaseJsonServlet extends HttpServlet {
    private static final long serialVersionUID = 1L;

    protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        doProcess(request, response);
    }

    protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        doProcess(request, response);
    }

    protected void doProcess(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        response.setContentType("application/json");
        response.setCharacterEncoding("UTF-8");
        this.process(request, response);
    }

    protected abstract void process(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException;
}

BaseJsonServlet を拡張した AjaxGridServlet。問題は、TSource のインスタンスを挿入するこのファイルにあります。

public abstract class AjaxGridServlet<TSource extends AjaxGridSource<?,?>> extends BaseJsonServlet {
    private static final long serialVersionUID = 1L;

    @Inject
    protected Instance<TSource> sourceInstance;

    @Override
    protected void process(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {

        TSource source= sourceInstance.get();
        source.process(request, response);
        response.getWriter().write(source.toJsonString());
        }
}

その後、AjaxGridServlet は Web サーブレットによって拡張されます

@WebServlet("/api/admin-dashboard")
public class AdminDashboard extends AjaxGridServlet<AdminDashboardSource> {
    private static final long serialVersionUID = 1L;
}

どんな助けでも大歓迎です。ありがとう。

4

2 に答える 2

3

メッセージが示すのは、型変数を持つインスタンスを持つことはできないということです。つまり、TSourceそこでは使用できません。

Instance<AjaxGridSource>代わりに使用する必要があります。

于 2013-06-13T18:59:25.613 に答える
1

試す

@Inject
protected Instance<AjaxGridSource> sourceInstance;

リフレクションがジェネリック引数の適切なランタイム型を検出するのは非常に複雑だからです。

于 2013-06-13T19:03:36.250 に答える