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JAVA OSGi(七)-基于Activator编码的OSGi实现WEB项目

Posted on Dec 20, 2014 By Freud Kang

  • 新建一个Plug-in Project，命名为OSGi_equinox_web
  • 下一步，在接下来的页面输入如下内容，然后finish

new project

  • 在META-INF/MANIFEST.MF文件中修改如下（红色标记部分为添加内容）

edit manifest

  • 在com.freud.osgi.web下新建一个类HelloWorldServlet，内容如下
package com.freud.osgi.web;

import java.io.IOException;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

public class HelloWorldServlet extends HttpServlet {
	@Override
	protected void doGet(HttpServletRequest req, HttpServletResponse resp)
			throws ServletException, IOException {
		resp.getWriter().write("Hello World - 1st version!");
	}
}
  • 修改com.freud.osgi.web包下的Activator文件内容为如下
package com.freud.osgi.web;

import org.osgi.framework.BundleActivator;
import org.osgi.framework.BundleContext;
import org.osgi.service.http.HttpService;

public class Activator implements BundleActivator {

	private static BundleContext context;

	private HttpService httpService;

	static BundleContext getContext() {
		return context;
	}

	public void start(BundleContext bundleContext) throws Exception {
		Activator.context = bundleContext;

		httpService = context.getService(context
				.getServiceReference(HttpService.class));

		httpService.registerServlet("/hello", new HelloWorldServlet(), null,
				null);
	}

	public void stop(BundleContext bundleContext) throws Exception {
		httpService.unregister("/hello");
		Activator.context = null;
	}

}
  • 运行：在项目上右键 - Run as -> Run configuration
  • 在OSGi Framework上右键new，配置如下

run configuration

  • 运行成功之后，控制台输如ss查看结果如下

ss stdout

run configuration


参考资料

视频教程 : http://v.youku.com/v_show/id_XNDE1NzU0OTY0.html
Equinox OSGi官网 : http://www.eclipse.org/equinox/
林昊 : 《OSGi原理与最佳实践》
Richard S. Hall : 《OSGi实战》