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网上找了很多例子,看了很多资料发现都不能完全重现一个OSGi的Web Demo
本文结合了《OSGi原理与最佳实践》+公司同事的《OSGi开发》+自己的理解。
环境WindowXP + eclipse3.4 + Spring OSGi1.2.1
1. 创建timeservice Bundle,提供输出时间的功能
1.1 eclipse内创建Maven Project,选quickstart project:timeservice,package org.osgichina.demo.timeservice
1.2 创建好后,remove maven的jar包,删掉project中的App和AppTest,在项目上右键->PDE Tools->Convert
1.3
package org.osgichina.demo.timeservice;
public interface TimeService {
String getCurrentTime();
}
public class TimeServiceImpl implements TimeService {
public String getCurrentTime() {
return (new Date()).toString();
}
}
1.4 Spring配置
配置放在META-INF/spring目录下,框架启动时会按照这个路径去寻找配置文件
timeservice.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"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
<!-- timeService bean -->
<bean name="timeService" class="org.osgichina.demo.timeservice.impl.TimeServiceImpl" />
</beans>
timeservice-osgi.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">
<!-- 将timeService 这个bean发布为OSGi服务的定义-->
<osgi:service id="osgiTimeService" ref="timeService" interface="org.osgichina.demo.timeservice.TimeService">
</osgi:service>
</beans>
这个Bundle到此已经完成了,下一节会讲解helloworldweb Bundle,涉及Import Package,OSGi的启动,Spring+Web的配置等
专注于Java,数据库性能,Web Server负载,数据挖掘,机器学习等方向
posted on 2011-09-18 21:13
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