[jira] [Created] (JCLOUDS-294) Improve Credential Storage mechanics

["Adrian Cole (JIRA)" <ji...@apache.org>]

Adrian Cole created JCLOUDS-294:
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             Summary: Improve Credential Storage mechanics
                 Key: JCLOUDS-294
                 URL: https://issues.apache.org/jira/browse/JCLOUDS-294
             Project: jclouds
          Issue Type: Improvement
          Components: jclouds-compute
            Reporter: Adrian Cole


jclouds currently has a CredentialStoreModule, which allows a user to supply a Map<String, Credentials> used to store credentials for nodes on startup, or to access them for running scripts.

An integration example was to back this by a Map<String, InputStream>, and experimental code actually used BlobStore to do this.  However, Map<String, InputStream> is really a bad abstraction as most inputstreams  are not replayable (It might be better as Map<String, Supplier<InputStream>>).  The cleanest implementation of the current process is likely for the user to provide their own Map<String, Credentials>, perhaps backed by hazelcast [1] if they want it to be distributed.

[1] http://www.hazelcast.com/docs/2.0/manual/multi_html/ch02s03.html

A better design would be to not use Map at all.  It is a wide interface that requires implementation of methods that have no usage in context.

A cleaner design could be 2 part: A sink or callback on new credentials, and a Cache<String, Credentials> for access.

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