在iPOJO中更新动态定位提供程序

时间:2014-11-06 10:05:12

标签: ipojo

我有一个声明为:

的组件
<ipojo>
    <component classname="HelloClass" name="helloCom" immediate="true">
        <requires field="delayService" id="id1">
        </requires>
    </component>
    <instance component="helloCom" name="hello">
        <property name="requires.from">
            <property name="id1" value="A"/>
        </property>
    </instance> 
</ipojo>

此组件的jar文件:helloComponent.jar

现在,我想将(value =“A”)更新为(value =“AA”)。因此,我使用ConfigurationAdmin实现一个组件来更新此属性

public class ControllerReconfiguration {

private ConfigurationAdmin m_configAdmin;

@SuppressWarnings({ "rawtypes", "unchecked" })
public void reconfigure() throws IOException {
    Configuration configuration = m_configAdmin.getConfiguration("hello","file:./helloComponent.jar");
    configuration.setBundleLocation("file:./helloComponent.jar");
    Properties props = new Properties();
    //Dictionary props = new Hashtable();
    props.put("id1", "AA");
    configuration.update(props);
    System.out.println("Update");       

}
}

但是,此ControllerReconfiguration组件无法更新'hello'实例中的值'A'('AA')。

如何修改此ControllerReconfiguration组件?

感谢您的帮助。

2 个答案:

答案 0 :(得分:1)

不幸的是,你无法推动新的&#39;像这样的配置。

但是,您可以直接使用iPOJO内省API:http://felix.apache.org/documentation/subprojects/apache-felix-ipojo/apache-felix-ipojo-userguide/ipojo-advanced-topics/using-ipojo-introspection-api.html

  1. 检索实例的架构服务
  2. 检索InstanceDescription和DependencyDescription
  3. 调用setFilter方法

答案 1 :(得分:0)

谢谢Clement,

它工作得很好!!!!! :)我使用Factory访问InstanceManager。

Ex,为了访问组件“hello.call.CallHello”的InstanceManager

@require
private Factory[] factories;
for (Factory factory : factories) {
                    /*
                     * "hello.call.CallHello" is a component name
                     * note: it is not component instance name
                     */

                    if (factory.getName().equals("hello.call.CallHello")) {
                        /*
                         * a component can have many instances
                         * if there is only one instance.
                         * get(0) return the first instance.
                         */
                        InstanceManager im = (InstanceManager) factory.getInstances().get(0);
}