【发布时间】:2011-12-04 16:51:38
【问题描述】:
我似乎无法将一个简单的 bean 注入我的 @WebService。在类路径上使用 Spring 并定义 javax.inject 依赖项后,我创建了一个简单的 JAX-WS Web 服务,其中包含一些底层接口驱动的 DAO 等:
@Named
@WebService(name = "NoteStorage", serviceName = "NoteStorageWS")
public class NoteStorageWS implements NoteStore {
private static final Log l = LogFactory.getLog(NoteStorageWS.class);
@Named("NoteDAO")
@Inject
private NoteDAO noteDAO;
public NoteStorageWS() {
super();
}
@Override
@WebMethod
public StorageState takeNote(String note) {
try {
l.info(format("Service received message: '%s'", note));
Note n = new Note();
n.setContent(note);
noteDAO.store(n);
} catch (Exception e) {
l.error(e);
return StorageState.FAILURE;
}
return StorageState.SUCCESS;
}
@WebMethod(exclude = true)
public void setNoteDAO(NoteDAO noteDAO) {
this.noteDAO = noteDAO;
}
}
NoteDAO刚刚实现:FlatFileNoteDAO,其定义如下:
@Named("NoteDAO")
public class FlatFileNoteDAO implements NoteDAO {
private static final Log l = LogFactory.getLog(FlatFileNoteDAO.class);
@Override
public void store(Note n) {
if (n == null) {
throw new IllegalArgumentException("Note was null");
}
try {
l.info(format("Storing note '%s'", n));
FileWriter fileWriter = new FileWriter(new File("Note"));
fileWriter.write(format("%s\n", n.getContent()));
fileWriter.close();
} catch (IOException e) {
throw new DataAccessException(e);
}
}
}
我的 web.xml 说:
<?xml version="1.0" encoding="UTF-8"?>
<web-app version="3.0" 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/web-app_3_0.xsd">
<welcome-file-list>
<welcome-file>index.html</welcome-file>
</welcome-file-list>
<context-param>
<param-name>contextConfigLocation</param-name>
<param-value>/WEB-INF/context.xml</param-value>
</context-param>
<listener>
<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>
<resource-env-ref>
<description>Object factory for the CDI Bean Manager</description>
<resource-env-ref-name>BeanManager</resource-env-ref-name>
<resource-env-ref-type>javax.enterprise.inject.spi.BeanManager</resource-env-ref-type>
</resource-env-ref>
</web-app>
我通过将应用程序指向 target/note-ws/ 目录并将应用程序部署到 Glassfish,并通过 ?Tester 页面执行简单的 takeNote 方法。
提交测试表单后,我在noteDAO.store(n); 行收到NullPointerException,可能是因为没有注入noteDAO。
我可以确认 Glassfish 在上下文初始化(Java EE 上下文)中的日志已经调用了 Spring:
[#|2011-12-04T16:57:24.970+0000|INFO|glassfish3.1.1|org.springframework.context.annotation.ClassPathBeanDefinitionScanner|_ThreadID=256;_ThreadName=Thread-2;|JSR-330 'javax.inject.Named' annotation found and supported for component scanning|#]
[#|2011-12-04T16:57:25.653+0000|INFO|glassfish3.1.1|org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor|_ThreadID=256;_ThreadName=Thread-2;|JSR-330 'javax.inject.Inject' annotation found and supported for autowiring|#]
[#|2011-12-04T16:57:25.757+0000|INFO|glassfish3.1.1|org.springframework.beans.factory.support.DefaultListableBeanFactory|_ThreadID=256;_ThreadName=Thread-2;|Pre-instantiating singletons in org.springframework.beans.factory.support.DefaultListableBeanFactory@9e39146: defining beans [noteStorageWS,NoteDAO,org.springframework.context.annotation.internalConfigurationAnnotationProcessor,org.springframework.context.annotation.internalAutowiredAnnotationProcessor,org.springframework.context.annotation.internalRequiredAnnotationProcessor,org.springframework.context.annotation.internalCommonAnnotationProcessor]; root of factory hierarchy|#]
表示我的 bean 已定义:noteStorageWS、NoteDAO 等等。
有什么想法吗?
编辑 澄清一下,我使用 Spring 来提供 JSR 330 -- 依赖注入 -- 功能。
【问题讨论】:
标签: dependency-injection jax-ws java-ee-6