我有 2 个 iPOJO 组件。
1- 提供“Hello”服务的 Provider 包。下面是组件的实现:
package helloipojo;
import helloipojo.service.HelloService;
import org.apache.felix.ipojo.annotations.Component;
import org.apache.felix.ipojo.annotations.Invalidate;
import org.apache.felix.ipojo.annotations.Provides;
import org.apache.felix.ipojo.annotations.Validate;
@Component(name="my-factory")
@Provides
public class HelloServiceImpl implements HelloService{
@Override
public void sayHello() {
System.out.println("Hello iPojo!");
}
@Validate
public void start() throws Exception {
System.out.println("Hello, I am ipojo bundle start method");
}
@Invalidate
public void stop() throws Exception {
System.out.println("Bye Bye, I am ipojo bundle stop method");
}
}
2- 使用 HelloService 对象的消费者捆绑包如下:
package helloserviceconsumer;
import helloipojo.service.HelloService;
import org.apache.felix.ipojo.annotations.Component;
import org.apache.felix.ipojo.annotations.Invalidate;
import org.apache.felix.ipojo.annotations.Requires;
import org.apache.felix.ipojo.annotations.Validate;
@Component(name="my-consumer-factory")
public class HelloConsumer {
@Requires
HelloService helloObject;
@Validate
private void start() {
// Starting method
//...
helloObject.sayHello();
//...
}
@Invalidate
protected void stop() {
// Stopping method
if(helloObject!=null) { helloObject.sayHello(); }
else System.out.println("hello service GONE!");
}
}
在一个单独的 Java 应用程序中,我加载这两个包并在 Apache Felix 上启动它们,如下所示:
Bundle b = bundleContext1.installBundle("file:C:\\Users\\zaid.almahmoud\\Desktop\\plugins\\HelloService_1.0.0.201401222235.jar");
b.start();
Bundle c = bundleContext1.installBundle("file:C:\\Users\\zaid.almahmoud\\Desktop\\plugins\\HelloServiceConsumer_1.0.0.201401222257.jar");
c.start();
以上所有工作正常。
现在,我想动态地实例化这两个组件,并观察捆绑消费者对捆绑提供者服务的消费情况。我使用了实例声明,如下:
DefaultInstanceDeclaration providerDeclaration = new DefaultInstanceDeclaration(b.getBundleContext(), "my-factory");
providerDeclaration.start();
DefaultInstanceDeclaration consumerDeclaration = new DefaultInstanceDeclaration(c.getBundleContext(), "my-consumer-factory");
consumerDeclaration.start();
运行应用程序时没有错误。但是,我看不到服务提供者和消费者的 start() 方法中存在的“Hello”消息。我什么都看不到。这意味着组件没有正确实例化。我哪里做错了?谢谢。
更新
我发现我没有在我的包上应用 iPOJO 操作,所以我使用 iPOJO Ant Task 进行了操作,如下所示:
<project>
<target name="main">
<!-- Change the path to point on the iPOJO Ant task jar-->
<taskdef name="ipojo"
classname="org.apache.felix.ipojo.task.IPojoTask"
classpath="C:/Users/zaid.almahmoud/feasibility-codes/ipojo/ipojo-distribution-1.11.0/bundle/org.apache.felix.ipojo.ant-1.11.0.jar"/>
<ipojo
input="C:/Users/zaid.almahmoud/Desktop/plugins/HelloService_1.0.0.201401222235.jar"
output="C:/Users/zaid.almahmoud/Desktop/plugins/Manipulated_HelloService.jar"
/>
</target>
</project>
现在,我可以在我的应用程序中看到工厂是有效的。这是命令中的输出:
g! ipojo:factories
Factory my-factory (VALID)
Factory org.apache.felix.ipojo.arch.gogo.Arch (UNKNOWN) - Private
因此,与以前不同,工厂“my-factory”可用。
但是,我的实例不可用,其创建如下:
DefaultInstanceDeclaration providerDeclaration = new DefaultInstanceDeclaration(b.getBundleContext(), "my-factory");
providerDeclaration.start();
同样,这不会显示错误,但不会在包的 start() 方法中显示预期的输出,并且在命令中,我可以看到:
g! ipojo:instance my-factory-0
Instance named 'my-factory-0' not found
g! ipojo:instances
Instance org.apache.felix.ipojo.arch.gogo.Arch-0 -> valid
你能帮忙吗?谢谢。