生命周期中关键3个类:

BundleActivator

入口点，类似main方法

BundleContext

Bundle上下文对象,在执行期间，为应用程序提供操作osgi框架的方法

Bundle

代表一个已安装的Bundle

接口说明:

BundleActivator:

public interface BundleActivator {	public void start(BundleContext context) throws Exception;	public void stop(BundleContext context) throws Exception;}

BundleContext:

public interface BundleContext {   ...   String getProperty(String key);   Bundle getBundle();   Bundle installBundle(String location, InputStream input)   throws BundleException;   Bundle installBundle(String location) throws BundleException;   Bundle getBundle(long id);   Bundle[] getBundles();   void addBundleListener(BundleListener listener);   void removeBundleListener(BundleListener listener);   void addFrameworkListener(FrameworkListener listener);   void removeFrameworkListener(FrameworkListener listener);   ...}

Bundle:

...BundleContext getBundleContext();long getBundleId();Dictionary getHeaders();Dictionary getHeaders(String locale);String getLocation();int getState();String getSymbolicName();Version getVersion();void start(int options) throws BundleException;void start() throws BundleException;void stop(int options) throws BundleException;void stop() throws BundleException;void update(InputStream input) throws BundleException;void update() throws BundleException;void uninstall() throws BundleException;

Bundle状态图:

demo:

准备:

在karaf_home下新建config、logs目录

将my-shell下的server.properties拷贝到karaf_home/config下

增加log4j日志配置,

部署Bundle

bundle:install -s mvn:com.demo.shell/my-shell/1.0.0-SNAPSHOT

打开window命令行输入:

telnet localhost 7080

输入help，能够查看全部命令帮助

输入install命令，部署外部Bundle:

install http://localhost:9090/testweb/bundle/user-model-0.0.1-SNAPSHOT.jar

在karaf中输入list,能够查看已经部署的bundle id

在window命令行输入命令，启动bundle

start bundle_id

在karaf中输入list,查看已部署的Bundle处于Active状态