Apache OpenWebBeans(CDI) + Servlet，注入无效

Question

我试图让CDI在Tomcat9.x中工作。我遵循以下链接，但openwebbean容器仍然没有将资源注入servlet

https://devlearnings.wordpress.com/2011/05/15/apache-openwebbeans-cdi-from-standalone-to-webapp/ https://dzone.com/articles/using-apache-openwebbeans ee.html

下面是我的servlet

package com.openwebbeans;

import java.io.IOException;

import javax.inject.Inject;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

public class SampleController extends  HttpServlet{

    private static final long serialVersionUID = 1L;

    @Inject
    private SampleService service;

    public void doGet(final HttpServletRequest request, final HttpServletResponse response) throws IOException {

        response.getWriter().print(service);
    }
}

下面是web.xml

<web-app 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"
    version="3.0">
    <display-name>OpenWebBeans</display-name>

    <listener>
        <listener-class>org.apache.webbeans.servlet.WebBeansConfigurationListener</listener-class>
    </listener>

    <servlet>
        <servlet-name>sample</servlet-name>
        <servlet-class>com.openwebbeans.SampleController</servlet-class>
    </servlet>
    <servlet-mapping>
        <servlet-name>sample</servlet-name>
        <url-pattern>/sample</url-pattern>
    </servlet-mapping>
</web-app>

在server.xml中添加了下面一行

<Listener className="org.apache.webbeans.web.tomcat7.ContextLifecycleListener" />

下面是我的pom.xml

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <groupId>com.openwebbeans</groupId>
    <artifactId>openwebbeans-beginner</artifactId>
    <packaging>war</packaging>
    <version>1.0</version>
    <name>openwebbeans-beginner</name>
    <url>http://maven.apache.org</url>
    <properties>
        <owb.version>2.0.0</owb.version>
    </properties>
    <dependencies>
        <dependency>
            <groupId>javax.servlet</groupId>
            <artifactId>javax.servlet-api</artifactId>
            <version>3.1.0</version>
            <scope>provided</scope>
        </dependency>
        <dependency>
            <groupId>org.apache.geronimo.specs</groupId>
            <artifactId>geronimo-atinject_1.0_spec</artifactId>
            <version>1.0</version>
            <scope>provided</scope>
        </dependency>
        <dependency>
            <groupId>org.apache.geronimo.specs</groupId>
            <artifactId>geronimo-jcdi_2.0_spec</artifactId>
            <version>1.0</version>
            <scope>provided</scope>
        </dependency>
        <dependency>
            <groupId>org.apache.geronimo.specs</groupId>
            <artifactId>geronimo-interceptor_1.2_spec</artifactId>
            <version>1.0</version>
            <scope>provided</scope>
        </dependency>
        <dependency>
            <groupId>org.apache.geronimo.specs</groupId>
            <artifactId>geronimo-annotation_1.3_spec</artifactId>
            <version>1.0</version>
            <scope>provided</scope>
        </dependency>
        <dependency>
            <groupId>org.apache.openwebbeans</groupId>
            <artifactId>openwebbeans-impl</artifactId>
            <version>${owb.version}</version>
            <scope>provided</scope>
        </dependency>
        <dependency>
            <groupId>org.apache.openwebbeans</groupId>
            <artifactId>openwebbeans-spi</artifactId>
            <version>${owb.version}</version>
            <scope>provided</scope>
        </dependency>
        <dependency>
            <groupId>org.apache.openwebbeans</groupId>
            <artifactId>openwebbeans-web</artifactId>
            <version>${owb.version}</version>
            <scope>provided</scope>
        </dependency>
        <dependency>
            <groupId>org.apache.openwebbeans</groupId>
            <artifactId>openwebbeans-tomcat7</artifactId>
            <version>${owb.version}</version>
            <scope>provided</scope>
        </dependency>
        <dependency>
            <groupId>org.javassist</groupId>
            <artifactId>javassist</artifactId>
            <version>3.21.0-GA</version>
            <scope>provided</scope>
        </dependency>
    </dependencies>
    <build>
        <finalName>openwebbeans-beginner</finalName>
    </build>
</project>

在tomcat库下添加了下面的jars

• geronimo-注释_1.3_spec-1.0
• _1.0_spec-1.0
• geronimo-拦截器_1.2_spec-1.0
• geronimo-jcdi_2.0_spec-1.0
• openwebbeans-el22-2.0.0
• openwebbeans-impl-2.0.0
• openwebbeans-spi-2.0.0
• openwebbeans-tomcat7-2.0.0
• openwebbeans-web-2.0.0
• xbean-asm5-shaded-4.5
• xbean-finder-shaded-4.5
• javassist-3.21.0-GA

下面是部署我的war后的服务器日志。从日志中可以清楚地看到，打开的web bean容器已经启动。

2017年7月10:06:08.315 INFO http-nio-8080-exec-5 org.apache.catalina.startup.HostConfig.deployWAR部署D:\krishna\apache-tomcat-9.0.0.M22\webapps\openwebbeans-beginner.war 20-2017年7月10:06:08.904 INFO http-nio-8080-exec-5 org.apache.webbeans.lifecycle.AbstractLifeCycle.bootstrapApplication OpenWebBeans容器开始.2017年7月10:06:09.229信息http-nio-8080-exec-5 org.apache.webbeans.lifecycle.AbstractLifeCycle.bootstrapApplication OpenWebBeans容器已经启动，花费了325 ms。2017年7月10:06:09.235 INFO http-nio-8080-exec-5 org.apache.catalina.startup.HostConfig.deployWAR D:\krishna\apache-tomcat-9.0.0.M22\webapps\openwebbeans-beginner.war部署工作在920 ms内完成。

此外，我在META/openwebbean下创建了org.apache.webbeans.spi.ContainerLifecycle=org.apache.webbeans.lifecycle.StandaloneLifeCycle并向其添加了openwebbeans.properties。但是它仍然不起作用

我也尝试过使用org.apache.webbeans.spi.ContainerLifecycle=org.apache.webbeans.web.lifecycle.WebContainerLifecycle，但是似乎没有什么效果。

有人能帮我把这件事做好吗？

Answer 1

如果您需要在servlet中注入，那么您需要比servlet侦听器更深层次的集成。我们提供了openwebbeans-tomcat7插件。

最简单的方法是使用我们的安装程序，正如我们在公告邮件https://lists.apache.org/thread.html/15b8cbcdbcc24942dae6d277d75363103a9d45d59047fda0e6abcbbe@%3Cannounce.apache.org%3E中所解释的那样

在这种情况下，只需将整个WebBeansConfigurationListener从web.xml中删除即可。如果您喜欢在“unpimped”Servlet容器中集成，或者在GAE中运行等等，那么您可以使用CDI.current()在servlet中获取CDI。

您也不再需要任何javassist依赖项了。很久以前在OWB-1.2.x上被移除了。

欢迎点击我们的邮件列表或在#openwebbean在freenode.net上的irc！

哦，还有另一个提示:您可以尝试我们的容器，它是OWB + Tomcat9 + CXF + Johnzon --都是9MB。它包括一个maven插件，一个Arquillian容器，等等。