【发布时间】：2011-07-29 03:43:43
【问题描述】：
我正在做一个项目，我想使用拦截器来记录 ManagedBean 的使用情况。正如我在规范和许多示例中阅读的那样，当前的 CDI 实现应该是可能的。代码主要是从 Glassfish JavaEE 教程等示例或我在网上找到的其他资源中复制的。其中没有特殊的实现。它应该只记录。
我尝试的是以下内容：
LoggedInterceptor.java
package test.interceptors;
import java.io.Serializable;
import javax.interceptor.AroundInvoke;
import javax.interceptor.Interceptor;
import javax.interceptor.InvocationContext;
@Logged
@Interceptor
public class LoggedInterceptor implements Serializable {
private static final long serialVersionUID = 1L;
public LoggedInterceptor() {
}
@AroundInvoke
public Object logMethodEntry(InvocationContext invocationContext)
throws Exception {
System.out.println(
"Entering method: " + invocationContext.getMethod().getName()
+ " in class "
+ invocationContext.getMethod().getDeclaringClass().getName());
return invocationContext.proceed();
}
}
Logged.java
package test.interceptors;
import static java.lang.annotation.ElementType.TYPE;
import static java.lang.annotation.ElementType.METHOD;
import static java.lang.annotation.RetentionPolicy.RUNTIME;
import java.lang.annotation.Inherited;
import java.lang.annotation.Retention;
import java.lang.annotation.Target;
import javax.interceptor.InterceptorBinding;
@Inherited
@InterceptorBinding
@Retention(RUNTIME)
@Target({
METHOD,
TYPE
})
public @interface Logged {
}
WEB-INF/beans.xml
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://java.sun.com/xml/ns/javaee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns /javaee/beans_1_0.xsd">
<interceptors>
<class>test.interceptors.LoggedInterceptor</class>
</interceptors>
</beans>
MainController.class
// ... All imports
@Named
@SessionScoped
@Logged
public class MainController implements Serializable {
// Code goes here
}
我得到的是 WELD 资源加载器中找不到类的异常。
[#|2011-04-04T14:03:37.394+0200|SEVERE|glassfish3.1|javax.enterprise.system.tools.admin.org.glassfish.deployment.admin|_ThreadID=31;_ThreadName=Thread-1;|Exception while loading the app : Error loading class test.interceptors.LoggedInterceptor
org.jboss.weld.resources.spi.ResourceLoadingException: Error loading class test.interceptors.LoggedInterceptor
at org.jboss.weld.resources.DefaultResourceLoader.classForName(DefaultResourceLoader.java:61)
at org.jboss.weld.manager.Enabled$ClassLoader.apply(Enabled.java:67)
at org.jboss.weld.manager.Enabled$ClassLoader.apply(Enabled.java:55)
at com.google.common.collect.Lists$TransformingRandomAccessList.get(Lists.java:435)
at java.util.AbstractList$Itr.next(AbstractList.java:345)
at org.jboss.weld.manager.Enabled.createMetadataMap(Enabled.java:130)
at org.jboss.weld.manager.Enabled.<init>(Enabled.java:100)
at org.jboss.weld.manager.Enabled.of(Enabled.java:82)
at org.jboss.weld.bootstrap.BeanDeployment.<init>(BeanDeployment.java:104)
at org.jboss.weld.bootstrap.WeldBootstrap$DeploymentVisitor.visit(WeldBootstrap.java:185)
at org.jboss.weld.bootstrap.WeldBootstrap$DeploymentVisitor.visit(WeldBootstrap.java:156)
at org.jboss.weld.bootstrap.WeldBootstrap.startContainer(WeldBootstrap.java:287)
at org.glassfish.weld.WeldDeployer.event(WeldDeployer.java:167)
at org.glassfish.kernel.event.EventsImpl.send(EventsImpl.java:128)
at org.glassfish.internal.data.ApplicationInfo.load(ApplicationInfo.java:262)
at com.sun.enterprise.v3.server.ApplicationLifecycle.deploy(ApplicationLifecycle.java:460)
at com.sun.enterprise.v3.server.ApplicationLifecycle.deploy(ApplicationLifecycle.java:240)
at org.glassfish.deployment.admin.DeployCommand.execute(DeployCommand.java:370)
at com.sun.enterprise.v3.admin.CommandRunnerImpl$1.execute(CommandRunnerImpl.java:355)
at com.sun.enterprise.v3.admin.CommandRunnerImpl.doCommand(CommandRunnerImpl.java:370)
at com.sun.enterprise.v3.admin.CommandRunnerImpl.doCommand(CommandRunnerImpl.java:1067)
at com.sun.enterprise.v3.admin.CommandRunnerImpl.access$1200(CommandRunnerImpl.java:96)
at com.sun.enterprise.v3.admin.CommandRunnerImpl$ExecutionContext.execute(CommandRunnerImpl.java:1247)
at com.sun.enterprise.v3.admin.CommandRunnerImpl$ExecutionContext.execute(CommandRunnerImpl.java:1235)
at com.sun.enterprise.v3.admin.AdminAdapter.doCommand(AdminAdapter.java:465)
at com.sun.enterprise.v3.admin.AdminAdapter.service(AdminAdapter.java:222)
at com.sun.grizzly.tcp.http11.GrizzlyAdapter.service(GrizzlyAdapter.java:168)
at com.sun.enterprise.v3.server.HK2Dispatcher.dispath(HK2Dispatcher.java:117)
at com.sun.enterprise.v3.services.impl.ContainerMapper.service(ContainerMapper.java:234)
at com.sun.grizzly.http.ProcessorTask.invokeAdapter(ProcessorTask.java:822)
at com.sun.grizzly.http.ProcessorTask.doProcess(ProcessorTask.java:719)
at com.sun.grizzly.http.ProcessorTask.process(ProcessorTask.java:1013)
at com.sun.grizzly.http.DefaultProtocolFilter.execute(DefaultProtocolFilter.java:225)
at com.sun.grizzly.DefaultProtocolChain.executeProtocolFilter(DefaultProtocolChain.java:137)
at com.sun.grizzly.DefaultProtocolChain.execute(DefaultProtocolChain.java:104)
at com.sun.grizzly.DefaultProtocolChain.execute(DefaultProtocolChain.java:90)
at com.sun.grizzly.http.HttpProtocolChain.execute(HttpProtocolChain.java:79)
at com.sun.grizzly.ProtocolChainContextTask.doCall(ProtocolChainContextTask.java:54)
at com.sun.grizzly.SelectionKeyContextTask.call(SelectionKeyContextTask.java:59)
at com.sun.grizzly.ContextTask.run(ContextTask.java:71)
at com.sun.grizzly.util.AbstractThreadPool$Worker.doWork(AbstractThreadPool.java:532)
at com.sun.grizzly.util.AbstractThreadPool$Worker.run(AbstractThreadPool.java:513)
at java.lang.Thread.run(Thread.java:619)
Caused by: java.lang.ClassNotFoundException: test.interceptors.LoggedInterceptor
at com.sun.enterprise.loader.ASURLClassLoader.findClassData(ASURLClassLoader.java:808)
at com.sun.enterprise.loader.ASURLClassLoader.findClass(ASURLClassLoader.java:696)
at java.lang.ClassLoader.loadClass(ClassLoader.java:307)
at java.lang.ClassLoader.loadClass(ClassLoader.java:252)
at org.jboss.weld.resources.DefaultResourceLoader.classForName(DefaultResourceLoader.java:52)
... 42 more
【问题讨论】：
-
代码看起来确实不错。您能否描述一下您的部署（战争？/耳朵？/结构？）您有机会将其推送到 JBoss 6 吗？
-
@jan-groth 您好，感谢您的回复。代码被部署为一个耳朵。耳朵包括两个 EJB 罐子和一个战争文件。拦截器应该由war 文件中的ManagedBeans 使用。抱歉，Glassfish 是强制性的，没有可用的 JBoss 安装。
-
尝试将拦截器代码移动到战争中，看看它是否仍然无法正常工作。 Weld 和 EAR 部署存在类路径问题...
-
对不起。没有写这个。拦截器代码在 war-file 中:-(我也从 EJB-Jars 或单独的包中尝试过它。它不起作用。但是我在 ManagedBeans 中使用它的方式是正确的？
标签： jakarta-ee glassfish aop interceptor cdi