亲爱的有才华的程序员! 我一直在使用OSGI框架,并试图在我的程序中应用Declarative Service,但它在屏幕上没有打印任何内容。 我的程序很简单,只有一个接口,一个类实现它,一个类使用接口作为客户端。
- 界面为:
package test.osdids.date;
public interface IDateService {
String getDate();
}
- 该类实现接口,因为服务是:
package test.osdids.date.service;
import java.util.Calendar;
import test.osdids.date.IDateService;
public class DateService implements IDateService {
@Override
public String getDate() {
String date = Calendar.getInstance().getTime().toString();
return date;
}
}
注册服务的XML是:
<?xml version="1.0" encoding="UTF-8"?>
<scr:component xmlns:scr="http://www.osgi.org/xmlns/scr/v1.1.0"
name="test.osdids.date.service">
<implementation class="test.osdids.date.service.DateService" />
<service>
<provide interface="test.osdids.date.IDateService" />
</service>
</scr:component>
该服务的清单文件为:
Manifest-Version: 1.0
Bundle-ManifestVersion: 2
Bundle-Name: TESTOSDIDSDATESERVICE
Bundle-SymbolicName: TESTOSDIDSDATESERVICE
Bundle-Version: 1.0.0.qualifier
Bundle-RequiredExecutionEnvironment: JavaSE-1.7
Service-Component: OSGI-INF/DateBridge.xml
Export-Package: test.osdids.date
Bundle-ActivationPolicy: lazy
- 现在,这是将服务作为客户端并打印出结果的类(此类位于其他插件项目中,与之前存储的插件项目不同接口和上面的实现类):
package test.osdids.date.consumer;
import test.osdids.date.IDateService;
public class DateConsumer {
private IDateService dateService;
public synchronized void setService(IDateService dateService) {
this.dateService = dateService;
System.out
.println("The Date Service has been registered successfully!");
System.out.println("The current time is: " + dateService.getDate());
}
public synchronized void unsetService(IDateService dateService) {
System.out
.println("The Date Service has been unregistered successfully!");
}
public void activate() {
System.out.println("Test again...");
System.out.println("The current time is: " + dateService.getDate());
}
public void deactivate() {
System.out.println("Stop the service!");
}
}
- 这是使用和绑定消费者类服务的XML文件:
<?xml version="1.0" encoding="UTF-8"?>
<scr:component xmlns:scr="http://www.osgi.org/xmlns/scr/v1.1.0"
name="test.osdids.date.consumer" activate="activate"
deactivate="deactivate" enabled="true" immediate="true">
<implementation class="test.osdids.date.consumer.DateConsumer" />
<reference bind="setService" cardinality="1..1"
interface="test.osdids.date.IDateService" name="IDateService" policy="static"
unbind="unsetService" />
</scr:component>
- 这是清单文件:
Manifest-Version: 1.0
Bundle-ManifestVersion: 2
Bundle-Name: TESTOSDIDSDATECONSUMER
Bundle-SymbolicName: TESTOSDIDSDATECONSUMER
Bundle-Version: 1.0.0.qualifier
Bundle-RequiredExecutionEnvironment: JavaSE-1.7
Require-Bundle: TESTOSDIDSDATESERVICE;bundle-version="1.0.0"
Service-Component: OSGI-INF/DateBridgeConsumer.xml
Import-Package: test.osdids.date
Bundle-ActivationPolicy: lazy
- 这是屏幕上的结果:
osgi>
(什么都没发生)
我希望有人知道这个问题并帮助我。 非常感谢提前!
答案 0 :(得分:0)
我得到了答案,只需通过Eclipse框架(产品)启动捆绑使用者,而不是通过OSGI框架启动捆绑使用者,然后捆绑将顺利运行