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:

源码下载

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,參考

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