如何读取OSGI实例的出厂配置 [英] How can I read factory configurations for my OSGI instance

问题描述

我有一个通过吊索实例化的OSGi变压器组件.在我的OSGi组件中，我具有以下注释:

I have a OSGi Transformer component which is instantiated by sling. In my OSGi component I have the following annotations :

@Component(configurationFactory = true, metatype = true, policy =       ConfigurationPolicy.REQUIRE, label = "CDN Link Rewriter", description = "Rewrites links to all static files to use configurable CDN")
@Service(value = TransformerFactory.class)
public class StaticLinkTransformer implements Transformer,
    TransformerFactory

我有一些属性，我将其注释为@Property

I have some properties which I have annotated as @Property

@Property(label = "CDN Url prefix", description = "CDN URL prefix", value = "")
private static final String CDN_URL_PREFIX = "cdn_url_prefix";

现在，我可以在felix控制台中使用"+"号为此类提供多种配置.如果我有"N"个配置，则吊索将实例化我的StaticLinkRewriter类的N个对象.

Now I am able to provide multiple configurations for this class using "+" sign in felix console. If I have "N" number of configurations, sling is instantiating N objects of my StaticLinkRewriter class.

问题:如何为实例化的对象获取正确的配置?我的意思是，在吊索实例化我的对象时，如何获得实例化对象的配置?

Question : How do I get the proper configurations for the object instantiated ? I mean, when sling instantiates my objects, how can i get the configurations for which the object was instantiated ?

推荐答案

我认为此组件不是由 Sling 实例化的，而是由 Declarative Services 实例化的.

I think this component is not instantiated by Sling but by Declarative Services.

如果实现activate方法，则可以获取配置.例如:

You can get the configuration if you implement the activate method. E.g.:

@Activate
void activate(ComponentContext ctx) {
   Dictionary configuration = ctx.getProperties();
   // use your configuration
}

有关更多信息，请参见OSGi汇编规范的 112声明式服务规范章节.

For more information, see the 112 Declarative Services Specification chapter of OSGi Compendium specification.

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