[OSGi] OSGi + Spring + Web Demo [二]

[OSGi] OSGi + Spring + Web Demo [2]

1. 同样方法创建helloworldweb Bundle，用Maven方式创建并转为PDE Tools。

2. 引入Spring OSGi 1.2.1

下载Spring OSGi 1.2.1，将其中dist和lib中的jar包都copy到eclipse的plugins目录中。重启eclipse。

3. HelloWorldController.java

public class HelloWorldController extends MultiActionController {

private TimeService timeService;

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public ModelAndView echoTime(HttpServletRequest request,

HttpServletResponse response) throws Exception {

System.out.println("echoTime");

ModelAndView mv = new ModelAndView("result");

mv.addObject("result", timeService.getCurrentTime());

return mv;

}

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public TimeService getTimeService() {

System.out.println("getTimeService");

return timeService;

}

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public void setTimeService(TimeService timeService) {

System.out.println("setTimeService");

this.timeService = timeService;

}

}

4. MANIFEST.MF。个人理解，import-package是代码编译中需要用到的class的package，包括import的class、及其父类、成员变量的类等。在运行时，需要勾选相应package的Bundle。

Import-Package: javax.servlet.http;version="2.5.0",

javax.servlet.jsp.jstl.core;version="1.1.2",

org.apache.jasper.servlet;version="5.5.17",

org.apache.taglibs.standard.tag.common.fmt;version="1.1.2",

org.osgichina.demo.timeservice,

org.springframework.beans;version="2.5.6.SEC01",

org.springframework.context.support;version="2.5.6.SEC01",

org.springframework.core;version="2.5.6.SEC01",

org.springframework.osgi.web.context.support;version="1.2.1",

org.springframework.web.context;version="2.5.6.SEC01",

org.springframework.web.context.support;version="2.5.6.SEC01",

org.springframework.web.servlet;version="2.5.6.SEC01",

org.springframework.web.servlet.handler;version="2.5.6.SEC01",

org.springframework.web.servlet.mvc;version="2.5.6.SEC01",

org.springframework.web.servlet.mvc.multiaction;version="2.5.6.SEC01",

org.springframework.web.servlet.mvc.support;version="2.5.6.SEC01",

org.springframework.web.servlet.view;version="2.5.6.SEC01"

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5. 引入timeservice Bundle中的service，WEB-INF/applicationContext.xml。引入的OSGi service，注入方式和普通service是一样的，见WEB-INF/spring-servlet.xml。

<?xml version="1.0" encoding="UTF-8"?>

<beans xmlns="http://www.springframework.org/schema/beans"

xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:osgi="http://www.springframework.org/schema/osgi"

xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd

http://www.springframework.org/schema/osgi http://www.springframework.org/schema/osgi/spring-osgi.xsd">

<!-- 引入OSGi Service -->

<osgi:reference id="osgiTimeService" interface="org.osgichina.demo.timeservice.TimeService" />

</beans>

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6. 定义web.xml，配置OSGi Web，配置Spring Framework

<?xml version="1.0" encoding="UTF-8"?>

<web-app version="2.4" xmlns="http://java.sun.com/xml/ns/j2ee"

xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"

xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd">

<context-param>

<param-name>contextClass</param-name>

<param-value>

org.springframework.osgi.web.context.support.OsgiBundleXmlWebApplicationContext

</param-value>

</context-param>

<listener>

<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>

</listener>

<servlet>

<servlet-name>spring</servlet-name>

<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>

<init-param>

<param-name>contextClass</param-name>

<param-value>

org.springframework.osgi.web.context.support.OsgiBundleXmlWebApplicationContext

</param-value>

</init-param>

<load-on-startup>2</load-on-startup>

</servlet>

<servlet-mapping>

<servlet-name>spring</servlet-name>

<url-pattern>/spring/*</url-pattern>

</servlet-mapping>

</web-app>

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7. WEB-INF/spring-servlet.xml。配置url mapping，service注入。可特别注意下，timeService的注入和普通service的注入是一样的。

<?xml version="1.0" encoding="UTF-8"?>

<beans xmlns="http://www.springframework.org/schema/beans"

xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"

xsi:schemaLocation="http://www.springframework.org/schema/beans

http://www.springframework.org/schema/beans/spring-beans.xsd">

<!-- page config -->

<bean id="viewResolver"

class="org.springframework.web.servlet.view.UrlBasedViewResolver">

<property name="viewClass"

value="org.springframework.web.servlet.view.JstlView" />

<property name="prefix" value="/" />

<property name="suffix" value=".jsp" />

</bean>

<!-- controller general config -->

<bean

class="org.springframework.web.servlet.mvc.support.ControllerClassNameHandlerMapping">

<property name="caseSensitive" value="true" />

<property name="order" value="0" />

<property name="pathPrefix" value="/" />

</bean>

<!-- controller general config -->

<bean id="internalPathMethodNameResolver"

class="org.springframework.web.servlet.mvc.multiaction.InternalPathMethodNameResolver" />

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<!-- action to url mapping -->

<bean id="urlMapping"

class="org.springframework.web.servlet.handler.SimpleUrlHandlerMapping">

<property name="mappings">

<props>

<prop key="/helloWorld/*">helloWorldController</prop>

</props>

</property>

</bean>

<!-- Bean Definition -->

<bean id="helloWorldController" class="org.osgichina.demo.web.HelloWorldController">

<property name="methodNameResolver">

<ref bean="internalPathMethodNameResolver" />

</property>

<property name="timeService" ref="osgiTimeService" />

</bean>

</beans>

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8. 启动Demo

Run Configurations -> OSGi Framework。

勾选timeservice和helloworldweb，引入相关的Bundle，示意图如下，

点Validate Bundle，可以看到还缺少哪些包。个人理解，这里应该包含import package中的Bundle和运行时调用的Bundle 。

启动后，可以看到Console中的输出日志。访问以下Url查看效果，

http://127.0.0.1:8080/helloworldweb/spring/helloWorld/echoTime

http://127.0.0.1:8080/helloworldweb/