5.10 is the design to solve the problem described in 3.4. -- BJ Hargrave Senior Technical Staff Member, IBM OSGi Fellow and CTO of the OSGi Alliance hargr...@us.ibm.com
office: +1 386 848 1781 mobile: +1 386 848 3788 From: Balázs Zsoldos <balazs.zsol...@everit.biz> To: OSGi Developer Mail List <osgi-dev@mail.osgi.org> Date: 2014/02/26 06:43 Subject: Re: [osgi-dev] Declarative Services and references with configurable cardinality Sent by: osgi-dev-boun...@mail.osgi.org Thanks! As much as I see (after a couple of minutes reading), chapter 3.4 is the one I was looking for. On Wed, Feb 26, 2014 at 12:22 PM, BJ Hargrave <hargr...@us.ibm.com> wrote: Have you seen 5.10 of RFC 190 [1] ? [1] https://github.com/osgi/design/raw/master/rfcs/rfc0190/rfc-0190-Declarative_Services_Enhancements.pdf -- BJ Hargrave Senior Technical Staff Member, IBM OSGi Fellow and CTO of the OSGi Alliance hargr...@us.ibm.com office: +1 386 848 1781 mobile: +1 386 848 3788 From: Balázs Zsoldos <balazs.zsol...@everit.biz> To: OSGi Developer Mail List <osgi-dev@mail.osgi.org> Date: 2014/02/26 04:47 Subject: [osgi-dev] Declarative Services and references with configurable cardinality Sent by: osgi-dev-boun...@mail.osgi.org Hi, an issue came up a couple of times that I could not solve with Declarative Services. First, I thought I had a very special use-case but it came up more and more times so I think it is time to share my thoughts. Imagine you have a servlet container as a component. The component will be instantiated if there is configuration and it will listen on the configured port. You want to specify the servlets that are available on that server instance. If you use whiteboard pattern, that does not make sure that all of the servlets are available at the time the server is started. What I was imagine is to create in the ServerComponent an array references: @Property(name="servlet.target", cardinality = 1) @Reference(cardinality = ReferenceCardinality.MANDATORY_BY_CONFIGURATION) Servlet[] servlet Now if the property servlet.target has the following value servlet.target = {"(servletName=myServlet1)", "(servletName=myServlet2)"} than the component will be active when the two servlet OSGi services are available that match the OSGi filters defined in the property. The logic comes up very often. Every time, when we want to allow extension points in our components in the way that our component should start only when all the configured extension points are available, this feature would be really helpful. What do you think? Regards, Balazs Zsoldos _______________________________________________ OSGi Developer Mail List osgi-dev@mail.osgi.org https://mail.osgi.org/mailman/listinfo/osgi-dev _______________________________________________ OSGi Developer Mail List osgi-dev@mail.osgi.org https://mail.osgi.org/mailman/listinfo/osgi-dev _______________________________________________ OSGi Developer Mail List osgi-dev@mail.osgi.org https://mail.osgi.org/mailman/listinfo/osgi-dev
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