[Smartfrog-checkins] [Smartfrog.org-JIRA] Commented: (SFOS-1288) Provide a way to list roles on a ClusterFarmer

[Steve L. (JIRA) <ji...@sm...>]

    [ http://jira.smartfrog.org/jira/browse/SFOS-1288?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=11825#action_11825 ] 

Steve Loughran commented on SFOS-1288:
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1. the AbstractClusterFarmer component implements a stub of this method, so everything will build if the others subclass this.

2. There is a FarmSupportsRole component/condition that can be used to verify that a farm has a specific role -without ever creating an instance. 


> Provide a way to list roles on a ClusterFarmer
> ----------------------------------------------
>
>                 Key: SFOS-1288
>                 URL: http://jira.smartfrog.org/jira/browse/SFOS-1288
>             Project: SmartFrog
>          Issue Type: Improvement
>          Components: .sfCore, _service_ec2
>            Reporter: Steve Loughran
>            Assignee: Steve Loughran
>             Fix For: 3.17.x
>
>
> Add a method to get a list of roles. This is for testing against infrastructure where it costs real $ to allocate machines; you don't want spend money just to see if you have a role or not.
> Two options
>  hasRole(string role) -> boolean. Simple test, doesn't disclose the whole list. Chatty over a network
>  listRoles() ->string[] . Lists all roles, lets you sort out the answers yourself. More data, but only one call needed
> I'm going for #2, with a warning in the javadocs that the list may change. The presence of a role does not mean that you can create it
> Adding tests in the mock farmer. This will break any other farmer implementations until they stub out the method,.

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