[dna-issues] [JBoss JIRA] Created: (DNA-588) The connectors should release all resources before notifying observer of events

[Randall Hauch (JIRA)]

The connectors should release all resources before notifying observer of events
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                 Key: DNA-588
                 URL: https://jira.jboss.org/jira/browse/DNA-588
             Project: DNA
          Issue Type: Bug
          Components: Connectors, Graph
    Affects Versions: 0.7
            Reporter: Randall Hauch
             Fix For: 1.0


Right now, most connectors are firing off the changes to the Observer before the resources acquired by the connector are released, meaning that the Observer cannot use the source within the same thread.  This prevents writing Observers that operate fully before the 'execute(...)' method returns, and requires that any Observer that might need access to the source needs to do its work asynchronously.

By notifying the Observer _after_ the resources are released but before 'execute(...)' returns, Observers could call back to the source (really through a different connection or at least through a different 'execute(...)' call) to access content.  This means that Observers could be written to work synchronously while still access the (committed) content.

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