Setting cloud-specific TemplateOptions in blueprints

[Richard Downer <ri...@apache.org>]

As we all know, Brooklyn uses jclouds to support many different cloud providers.

jclouds allows some clouds to offer features specific to their own
clouds, by creating a cloud-specific subclass of TemplateOptions and
adding their own methods to set feature properties.

Brooklyn allows setting certain TemplateOptions in blueprints, from a
fixed set[1]. This has the disadvantage that arbitrary cloud-specific
features cannot be used by Brooklyn or by blueprints.

I would like to propose a feature that allows arbitrary
TemplateOptions to be set from a blueprint (or from
brooklyn.properties). I am currently considering the options, but I
plan to investigate using reflection to be able to call arbitrary
single-parameter property setters on the TemplateOptions instance.

Any comments on this proposal?

Thanks
Richard.


[1]https://github.com/apache/incubator-brooklyn/blob/e86bdcb220d3443f08cb89dd215d4b7262de5c30/locations/jclouds/src/main/java/brooklyn/location/jclouds/JcloudsLocation.java#L875-875