服务

 

× 注册服务

public void start(BundleContext context) throws Exception {//BundleContextcontext.registerService(clazz, service, properties);context.registerService(clazzes, service, properties);} 

clazz                  服务接口

service              服务实现

properties         如果服务接口相同,此属性区别

 

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* 使用服务

import org.osgi.framework.BundleActivator;import org.osgi.framework.BundleContext;importorg.osgi.framework.BundleActivator; importorg.osgi.framework.BundleContext; importorg.osgi.framework.ServiceReference; importcom.javaworld.sample.service.HelloService; public class Activator implements BundleActivator {//服务的引用ServiceReference helloServiceReference; public void start(BundleContext context)throws Exception { System.out.println("HelloWorld!!");//获取服务的引用helloServiceReference = context.getServiceReference(HelloService.class.getName());//获取服务实例HelloService helloService=(HelloService)context.getService(helloServiceReference);System.out.println(helloService.sayHello()); } public void stop(BundleContext context)throws Exception { System.out.println("Goodbye World!!");//注销服务引用context.ungetService(helloServiceReference); } }