消费一个Bundle服务

1、消费接口及其实现类

public interface UserValidatorListener {
	public boolean checkUser(String username, String password)throws Exception;
}

public class UserValidatorListenerImpl implements UserValidatorListener {
	private ServiceTracker serviceTracker;
	
	public UserValidatorListenerImpl(ServiceTracker serviceTracker){
		this.serviceTracker = serviceTracker;
	}
	
	@Override
	public boolean checkUser(String username, String password)throws Exception{
		Validator validatorService = (Validator)serviceTracker.getService(); //取得被跟踪的服务
		if(validatorService==null){
			return false;
		}else{
			return validatorService.validate(username, password); //调用服务方法
		}
	}
}

2、Bundle**器

public class UserValidatorWebActivator implements BundleActivator {
	private ServiceRegistration serviceRegistration;
	private ServiceTracker serviceTracker;
	
	public void start(BundleContext context) throws Exception {
		serviceTracker = new ServiceTracker(context, Validator.class.getName(), null); //服务跟踪器，对Validator服务进行跟踪
		serviceTracker.open(); //启动服务跟踪器
		
		UserValidatorListener listener = new UserValidatorListenerImpl(serviceTracker);
		boolean b = listener.checkUser("admin", "admin2");
		System.out.println("用户验证结果：" + b);
	}

	public void stop(BundleContext context) throws Exception {
		serviceTracker.close(); //关闭服务跟踪器
	}
}

3、MANIFEST.MF文件内容

Manifest-Version: 1.0
Bundle-ManifestVersion: 2
Bundle-Name: UserValidatorWebBundle
Bundle-SymbolicName: UserValidatorWebBundle
Bundle-Version: 1.0.0
Bundle-Activator: com.cjm.bundle.user.service.web.UserValidatorWebActivator
Import-Package: com.cjm.bundle.user.service;version="1.0.0",
 org.osgi.framework;version="1.3.0",
 org.osgi.util.tracker;version="1.3.3"

4、打包Bundle后，执行install命令安装Bundle，执行start命令启动Bundle