Injecting multiple child classes into service with Jersey and HK2

Question

I have an abstract class AbstractTimerTask that extends TimerTask and I have a Jersey service that is going to manage these timer tasks. I will have more than one implementation of the abstract class, and I would like them all injected into the service. If possible, I would like to be able to inject them into a list of type List<AbstractTimerTask>. It is possible that one or more of the child classes will not be available, depending on which jar files I deploy to the server. I would like only the child classes that are available to be injected. For this reason, I can't just list the classes in the service class as individual dependencies and build the list myself.

Is it possible to inject multiple classes with the same parent type into a list of that parent type?

In particular hk2 was designed to work very well in situations where the child classes are added or removed at runtime. It allows for a very dynamic set of runtime services that can change during the lifetime of the JVM — jwells131313, Sep 18 '15 at 01:24

score 3 · Accepted Answer · edited May 23 '17 at 12:03

3

You can inject IterableProvder<AbstractTimerTask>, as seen in this answer

edited May 23 '17 at 12:03

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answered Sep 17 '15 at 13:33

Paul Samsotha

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Injecting multiple child classes into service with Jersey and HK2

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