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）
进入Felix目录。
执行 java -jar ./bin/felix.jar
felix.jar 默认会在当前当前运行目录的 bundle 文件夹内加载启动所需的 bundle，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。
项目启动起一次启动的时候回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 <felix-dir> 即可。
(2) 源码导入eclipse运行
下载子项目Main,http://mirror.bit.edu.cn/apache//felix/org.apache.felix.main-6.0.3-project.zip
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
2、felix开发插件
用的是官方例子代码http://felix.apache.org/documentation/tutorials-examples-and-presentations/apache-felix-osgi-tutorial.html，
http://felix.apache.org/documentation/tutorials-examples-and-presentations/apache-felix-osgi-tutorial/apache-felix-tutorial-example-2.html
http://felix.apache.org/documentation/tutorials-examples-and-presentations/apache-felix-osgi-tutorial/apache-felix-tutorial-example-2b.html
http://felix.apache.org/documentation/tutorials-examples-and-presentations/apache-felix-osgi-tutorial/apache-felix-tutorial-example-3.html
这是一个检查输入单词(英文、中文....)是否正确的例子功能
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
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<String, String> props = new Hashtable<String, String>();
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
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<String, String> props = new Hashtable<String, String>();
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
字典检测客户端实现，也是作为一个插件
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：
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。
安装运行效果
