1、官网下载http://felix.apache.org/downloads.cgi，

当前最新版本6.0.3

运行felix窗口有两种方式

(1) 可以直接下载发布版本

Felix Framework Distribution(org.apache.felix.main.distribution-6.0.3.zip)

解压后目录

进入项目目录，命令行下执行

java -jar ./bin/felix.jar

felix.jar 默认会在当前运行目录的 bundle 文件夹内加载启动所需的插件jar，config 目录下的 config.propeties 和 system.properties 里面加载环境变量，如果将其他目录作为启动根目录，该目录下不存在 felix 启动所需信息，启动就会有问题。项目第一次启动的时候会在启动目录下创建一个felix-cache的目录，用于存放框架运行过程产生的数据，当然该目录可以在启动的时候配置，使用 java -jar ./bin/felix.jar 即可。

解压org.apache.felix.main-6.0.3-project.zip，进入目录，命令行下

运行mvn eclipse:eclipse工程文件，

再输入mvn package，打包编译

File->Import导入到eclipse

在eclipse的org.apache.felix.main.Main类右键运行Run As Java Application

常用命令

lb:查看已装插件包

start:运行插件包

stop:停止运行插件包

install:安装插件包

uninstall:删除插件包

其它命令可以通过help查看

先定义一个服务类：

package test.penngo.service;

/**

* 简单的定义了一个字典服务接口，该接口的功能只是简单的验证一个词是否正确。

**/

public interface DictionaryService

{

/**

* 检查 单词是否存在

**/

public boolean checkWord(String word);

}

英文词典插件包开发

package tutorial.example2;

import java.util.Hashtable;

import org.osgi.framework.BundleActivator;

import org.osgi.framework.BundleContext;

import test.penngo.service.DictionaryService;

/**

* 英文字典服务插件

**/

public class Activator implements BundleActivator {

/**

* 服务启动

*

* @param context the framework context for the bundle.

**/

public void start(BundleContext context) {

Hashtable props = new Hashtable();

props.put("Language", "English");

context.registerService(DictionaryService.class.getName(), new DictionaryImpl(), props);

}

/**

* 服务停止

*

* @param context the framework context for the bundle.

**/

public void stop(BundleContext context) {

// NOTE: The service is automatically unregistered.

}

/**

* 英文词典服务实现

**/

private static class DictionaryImpl implements DictionaryService {

String[] m_dictionary = { "welcome", "to", "the", "osgi", "tutorial" };

/**

* 英文单词检测

**/

public boolean checkWord(String word) {

word = word.toLowerCase();

for (int i = 0; i < m_dictionary.length; i++) {

if (m_dictionary[i].equals(word)) {

return true;

}

}

return false;

}

}

}

META-INF.MF

Manifest-Version: 1.0

Bundle-ManifestVersion: 2

Bundle-SymbolicName: English

Bundle-Name: English dictionary

Bundle-Description: A bundle that registers an English dictionary service

Bundle-Vendor: penngo

Bundle-Version: 1.0.0

Bundle-Activator: tutorial.example2.Activator

Import-Package: org.osgi.framework, test.penngo.service

英文词典插件打包导出，eclipse自带的export打包会有问题，本文使用fatjar工具打包，

中文词典插件包开发

package tutorial.example2b;

import java.util.Hashtable;

import org.osgi.framework.BundleActivator;

import org.osgi.framework.BundleContext;

import test.penngo.service.DictionaryService;

/**

* 中文词典包

**/

public class Activator implements BundleActivator

{

public void start(BundleContext context)

{

Hashtable props = new Hashtable();

props.put("Language", "Chinese");

context.registerService(

DictionaryService.class.getName(), new DictionaryImpl(), props);

}

public void stop(BundleContext context)

{

// NOTE: The service is automatically unregistered.

}

/**

* 中文词典服务实现

**/

private static class DictionaryImpl implements DictionaryService

{

// The set of words contained in the dictionary.

String[] m_dictionary =

{ "欢迎", "你好", "教程", "模块" };

public boolean checkWord(String word)

{

word = word.toLowerCase();

for (int i = 0; i < m_dictionary.length; i++)

{

if (m_dictionary[i].equals(word))

{

return true;

}

}

return false;

}

}

}

Manifest-Version: 1.0

Bundle-ManifestVersion: 2

Bundle-SymbolicName: Chinese

Bundle-Name: Chinese dictionary

Bundle-Description: A bundle that registers a Chinese dictionary service

Bundle-Vendor: penngo

Bundle-Version: 1.1.0

Bundle-Activator: tutorial.example2b.Activator

Import-Package: org.osgi.framework, test.penngo.service

插件打包

客户端调用词典开发，也是作为一个felix插件

package tutorial.example3;

import java.io.BufferedReader;

import java.io.InputStreamReader;

import java.io.IOException;

import org.osgi.framework.BundleActivator;

import org.osgi.framework.BundleContext;

import org.osgi.framework.ServiceReference;

import test.penngo.service.DictionaryService;

/**

* 此客户端在启动时，接收控制台输入，检查输入的单词是否正确，并且打印初相应的检测结果，

* 注意：当我们没有输入任何信息的时候，单词检测便会结束，如果需要重新进入单词检测程序，我们需要重新启动插件。

**/

public class Activator implements BundleActivator

{

public void start(BundleContext context) throws Exception

{

// 获取所有词典插件

ServiceReference[] refs = context.getServiceReferences(

DictionaryService.class.getName(), "(Language=*)");

if (refs != null)

{

System.out.println("=======当前可用词典插件:" + refs.length);

try

{

System.out.println("Enter a blank line to exit.");

BufferedReader in = new BufferedReader(new InputStreamReader(System.in));

String word = "";

while (true)

{

System.out.print("Enter word: ");

word = in.readLine();

if (word.length() == 0)

{

break;

}

boolean isCorrect = false;

for(ServiceReference service:refs) {

DictionaryService dictionary =

(DictionaryService) context.getService(service);

if (dictionary.checkWord(word))

{

isCorrect = true;

System.out.println("Correct.");

}

}

if(isCorrect == false)

{

System.out.println("Incorrect.");

}

}

} catch (IOException ex) {

ex.printStackTrace();

}

}

else

{

System.out.println("Couldn't find any dictionary service...");

}

}

/**

* Implements BundleActivator.stop(). Does nothing since

* the framework will automatically unget any used services.

* @param context the framework context for the bundle.

**/

public void stop(BundleContext context)

{

// NOTE: The service is automatically released.

}

}

Manifest-Version: 1.0

Bundle-ManifestVersion: 2

Bundle-SymbolicName: client

Bundle-Name: Dictionary client

Bundle-Description: A bundle that uses the dictionary service if it finds it at startup

Bundle-Vendor: penngo

Bundle-Version: 1.3.0

Bundle-Activator: tutorial.example3.Activator

Export-Package: test.penngo.service

Import-Package: org.osgi.framework

#//注意：test.penngo.service这个包与tutorial.example3打在同一个jar中，如果example3.jar更新，其它依赖test.penngo.service的也需要更新或重启felix.

安装插件

把上边生成的插件包example2.jar,example2b.jar,example3.jar入到org.apache.felix.main-6.0.3项目的plugins文件夹中

安装和运行效果：

通过插件方式开发，后期继续扩展增加其它语言词典(日语，俄语，韩语)，不需要重启服务，也不影响已存在的语言词典功能(英文、中文)。

3、开发http服务插件

package test.penngo.http.example;

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 TestServlet extends HttpServlet {

@Override

protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {

resp.getWriter().write("hello penngo");

}

}

package test.penngo.http.example;

import org.osgi.framework.BundleActivator;

import org.osgi.framework.BundleContext;

import org.osgi.framework.ServiceReference;

import org.osgi.service.http.HttpService;

import org.osgi.util.tracker.ServiceTracker;

public class Activator implements BundleActivator {

private ServiceTracker httpTracker;

public void start(BundleContext context) throws Exception {

httpTracker = new ServiceTracker(context, HttpService.class.getName(), null) {

public void removedService(ServiceReference reference, Object service) {

// HTTP service is no longer available, unregister our servlet...

try {

((HttpService) service).unregister("/hello");

} catch (IllegalArgumentException exception) {

// Ignore; servlet registration probably failed earlier on...

}

}

public Object addingService(ServiceReference reference) {

// HTTP service is available, register our servlet...

HttpService httpService = (HttpService) this.context.getService(reference);

try {

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

} catch (Exception exception) {

exception.printStackTrace();

}

return httpService;

}

};

// start tracking all HTTP services...

httpTracker.open();

}

public void stop(BundleContext context) throws Exception {

// stop tracking all HTTP services...

httpTracker.close();

}

}

#MANIFEST.MF

Manifest-Version: 1.0

Bundle-ManifestVersion: 2

Bundle-SymbolicName: hello

Bundle-Name: hello penngo

Bundle-Description: Http Hello World

Bundle-Vendor: penngo

Bundle-Version: 1.0.0

Bundle-Activator: test.penngo.http.example.Activator

Import-Package: org.osgi.framework,

org.osgi.service.http,

org.osgi.util.tracker,

javax.servlet.http,

javax.servlet

注意htpp插件包依赖:

org.apache.felix.http.base-4.0.6.jar,

org.apache.felix.http.bridge-4.0.8.jar,

org.apache.felix.http.jetty-4.0.10.jar,

org.apache.felix.http.servlet-api-1.1.2.jar,

org.apache.felix.http.whiteboard-4.0.0.jar

需要先安装上边的插件包，才能正常在felix中运行http功能。

安装运行效果

浏览器访问：

附件源码：