我正在使用Jersey 1.x,Guice开发一个简单的应用程序,并尝试在Tomcat上运行。
我使用了Guice过滤器和Guice Listener以及Resources和Application。
以下是我的web.xml:
<filter>
<filter-name>guiceFilter</filter-name>
<filter-class>com.google.inject.servlet.GuiceFilter</filter-class>
</filter>
<filter-mapping>
<filter-name>guiceFilter</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>
<listener>
<display-name>Guice Listener</display-name>
<listener-class>com.simple.application.GuiceListener</listener-class>
</listener>
使用GuiceListener我注入了所有依赖项,
public class GuiceListener extends GuiceServletContextListener {
private Injector injector;
@Override
public void contextDestroyed(ServletContextEvent servletContextEvent) {
try {
super.contextDestroyed(servletContextEvent);
} finally {
injector = null;
}
}
@Override
public void contextInitialized(ServletContextEvent servletContextEvent) {
injector = Guice.createInjector(new SimpleServlet());
super.contextInitialized(servletContextEvent);
injector.injectMembers(this);
}
@Override
protected Injector getInjector() {
return injector;
}
}
这就是我的Servlet看起来的样子
public class SimpleServlet extends JerseyServletModule {
@Override
protected void configureServlets() {
configureGuiceServlet();
}
private void configureGuiceServlet() {
bind(SimpleResource.class).in(Scopes.SINGLETON);
serve("/service/*").with(GuiceContainer.class);
bind(Manager.class).to(ManagerImpl.class);
}
}
我使用GET方法创建了一个资源,
@Path("/stuff")
public class SimpleResource {
private final ManagerImpl manager;
@Inject
public SimpleResource(final ManagerImpl manager) {
this.manager = manager;
}
@GET
@Path("{id}")
@Produces(MediaType.TEXT_HTML)
public String submitData(@PathParam("id") final String id) {
String welcomeScreen = manager.getWelcomeScreen();
return "This is" + welcomeScreen + id;
}
}
我使用Constructor Injection注入类。
这就是我的应用程序的外观
public class SimpleApplication extends Application {
@Override
public Set<Class<?>> getClasses() {
return ImmutableSet.<Class<?>>builder()
.add(SimpleResource.class)
.build();
}
}
我正在Tomcat 7上部署它,当我尝试点击应用程序端点时,我得到404,
http://localhost:9999/simple-0.0.1-SNAPSHOT/service/stuff/id
我可以在日志中看到所有类都已成功实例化。
这些是我朋友的依赖。
<dependency>
<groupId>com.sun.jersey</groupId>
<artifactId>jersey-server</artifactId>
<version>1.18.6</version>
<scope>compile</scope>
</dependency>
<dependency>
<groupId>com.sun.jersey.contribs</groupId>
<artifactId>jersey-guice</artifactId>
<scope>compile</scope>
<version>1.18.6</version>
</dependency>
<dependency>
<groupId>com.google.inject.extensions</groupId>
<artifactId>guice-servlet</artifactId>
<scope>compile</scope>
<version>3.0</version>
</dependency>
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>servlet-api</artifactId>
<scope>provided</scope>
<version>2.5</version>
</dependency>
<dependency>
<groupId>com.google.guava</groupId>
<artifactId>guava</artifactId>
<scope>compile</scope>
<version>14.0</version>
</dependency>
</dependencies>
对于带有guice的Tomcat,我有什么遗漏吗?
答案 0 :(得分:2)
您正在使用ServletModule。改为使用JerseyServletModule。
public class SimpleServlet extends JerseyServletModule
常规清理选项:
当我使用Guice / Tomcat / Jersey 1.x时,我做的有点不同。为了提高灵活性,您可以从SimpleResource的路径参数中获取路径参数并将其移动到方法中。也可以直接将Singleton Annotation添加到资源中。
@Singleton
@Path("/stuff")
public class SimpleResource {
private final ManagerImpl manager;
@Inject
public SimpleResource(final ManagerImpl manager) {
this.manager = manager;
}
@GET
@Path("{id}")
@Produces(MediaType.TEXT_HTML)
public String submitData(@PathParam("id") final String id) {
String welcomeScreen = manager.getWelcomeScreen();
return "This is" + welcomeScreen + id;
}
}
删除SimpleApplication并在configureGuiceServlet中删除反射和选项映射,而不是:
public class SimpleServlet extends JerseyServletModule{
@Override
protected void configureServlets() {
configureGuiceServlet();
}
private void configureGuiceServlet() {
serve("/service/*").with(GuiceContainer.class, new HashMap<String, String>());
bind(Manager.class).to(ManagerImpl.class);
}
}