[dna-issues] [JBoss JIRA] Updated: (DNA-401) Remove SequencingService Dependency on JCR

Wed May 13 01:20:46 EDT 2009

     [ https://jira.jboss.org/jira/browse/DNA-401?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Brian Carothers updated DNA-401:
--------------------------------

    Attachment: scratch.patch

Patch that addresses the issue but breaks the sequencing quickstart.  Unfortunately, that quick start is heavily dependent on the existence of a JackRabbit repository to support the existing JCR dependencies in ObservationService and SequencingService.  There seems to be a chicken-or-egg problem with which to fix first.

This patch passes all other tests (save one that depends on ObservationService being converted and is @Ignored for now), but has not been reviewed to check that relevant documentation is updated and should not be committed in its current state.  Most of the patch is just churn from renaming SequencerContext to StreamSequencerContext.

> Remove SequencingService Dependency on JCR
> ------------------------------------------
>
>                 Key: DNA-401
>                 URL: https://jira.jboss.org/jira/browse/DNA-401
>             Project: DNA
>          Issue Type: Feature Request
>          Components: API, Sequencers
>    Affects Versions: 0.4
>            Reporter: Brian Carothers
>         Attachments: scratch.patch
>
>
> DNA currently has a circular dependency, in that the JCR project depends on the repository and graph projects (and others) as the backing store while the repository project depends on the existence of a JCR layer for the SequencingService and ObservationService.  Removing the JCR dependency is tentatively planned for the ObservationService as part of DNA-252.  It would be useful to remove the final piece of the circular dependency and make the SequencingService interact directly with the graph layer.
> As I see it, this would have the following benefits:
> 1. Removing a circular dependency in the architecture
> 2. (Ever so slightly) increasing performance by removing the expense of converting DNA nodes and properties to and from their JCR equivalents

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