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From "Dies Koper (JIRA)" <j...@apache.org>
Subject [jira] [Created] (DTACLOUD-337) return empty array instead of error when resource not found
Date Mon, 08 Oct 2012 01:56:02 GMT
Dies Koper created DTACLOUD-337:
-----------------------------------

             Summary: return empty array instead of error when resource not found
                 Key: DTACLOUD-337
                 URL: https://issues.apache.org/jira/browse/DTACLOUD-337
             Project: DeltaCloud
          Issue Type: Improvement
          Components: Server
         Environment: latest workspace, fgcp driver
            Reporter: Dies Koper
            Priority: Minor
         Attachments: 0001-FGCP-return-empty-array-instead-of-error-when-no-dat.patch

Making fgcp driver comply with what mfojtik said in an e-mail to the ML on 26/07/2012:

While I working on driver unit tests, I discovered that different drivers
use different ways how to return data. For example in EC2, when you query
for 'non-existing' resource (like instance), an Exception is being raised
whereas in Mock driver, the method just return empty array or 'nil'.

I think it would be great to have this unified across all driver, before
we start advertising the new Library code.

So I took the 'Mock' driver as an example, mean that:

driver.instance(:id => 'unknown') => nil
driver.instances(:id => 'unknown') => []

I think this behavior is more easy to understand that capturing different
kinds of exceptions.


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