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The OSGi plugins defines the osgi interceptor and osgiStack(defaultStack plus the osgi interceptor) in the package osgi-default. This interceptor will check the action and if it implements org.apache.struts2.osgi.interceptor.BundleContextAware, it will invoke setBundleContext(BundleContext bundleContext) on the action, passing the BundleContext of the OSGi container. The interceptor also checks if the class implements one or many org.apache.struts2.osgi.interceptor.ServiceAware<T> interfaces, and for each one, it will call , if it does, setServices(List<T> services) will be called, where T is the type of a service published in the OSGi container. For example, lets assume an installed bundle publishes a service with the interface BookPriceLookup, to get all the instances of this service, an action would look like:

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