You might want to have a look at the extender pattern und the iPOJO extender handler:
http://felix.apache.org/site/extender-pattern-handler.html not sure that this is what you want exactly but it might come close. regards, Karl On Fri, Mar 13, 2009 at 2:53 PM, Richard S. Hall <[email protected]> wrote: > Hmm. iPOJO is intended to be a component model for OSGi, so you are sort of > wanting to go against the grain if you don't want to use services. > > I understand your concern about overhead, but I think any system that > manages your components' lifecycle is going to have to keep some registry of > instances too, unless you have a purely static management framework that > just creates instances once and forgets about them. Your request is > essentially asking iPOJO to duplicate the service registry as some sort of > hidden "component registry". > > However, Clement and I did discuss this topic before for iPOJO, but I don't > think anything was done here. > > Maybe Clement has more to add. > > -> richard > > On 3/13/09 6:28 AM, Stéphane Amaudruz wrote: >> >> Hi, >> >> >> >> I think I am missing some point in iPOJO. >> >> >> >> The use case is: >> >> * I have an interface, let’s say IRuleStrategy, that define >> execution strategies for Rule. >> >> * I have different implementations: Strategy1 to execute Rule on >> system version1 and Strategy2 to execute Rule on system version2. >> >> * I will create a singleton instance of each of these >> implementation >> with IPOJO >> >> >> >> Now in my ExecutionEngine I want to retrieve the strategy for a rule, >> depending on a the system version, something as getStrategy(int version). >> I >> do not see how to do that with IPOJO component? That means how to retrieve >> are component from its interface and some properties. >> >> >> >> The only solution I think about is that the component publishes an OSGi >> service and then I can retrieve the service by properties. But can I avoid >> it and requesting component instead of service, what are the best >> practices? >> Is fear an overhead using services and also I am not confident about OSGi >> service and multithreading ? >> >> >> >> Thanks, >> >> Steph >> >> >> >> >> >> >> >> >> > > --------------------------------------------------------------------- > To unsubscribe, e-mail: [email protected] > For additional commands, e-mail: [email protected] > > -- Karl Pauls [email protected] --------------------------------------------------------------------- To unsubscribe, e-mail: [email protected] For additional commands, e-mail: [email protected]
