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https://jira.duraspace.org/browse/DS-1172?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=25812#comment-25812
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DSpace @ Lyncode commented on DS-1172:
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Ok. My point here is that, using Spring Roo generated entities, will represent
a break on your previous work.
Our first attempts shown us:
Advantages:
- Intuitive API
- Good performance results
Disadvantages:
- Advanced queries requires the use of HQL (almost SQL)
- If such implementation was accepted it would require changing almost all
DSpace code that queries the database (or at least, it must require).
Anyway, it's already working and it's easy to integrate with DSpace (as it
already contains spring based services) -
https://github.com/lyncode/dspace-data-layer/wiki/Code-Snippets.
Questions:
- Would it be fair to use such implementation?
- Would it be fair to keep the old database API and provide a new one? So it
would be possible to achieve the same task progressively.
- Would it be fair to provide such API within dspace-api module? As a new
module? As dspace-services module? Or as a new project (1)?
(1) I'm fan of this approach, mainly, because one could have distinct DSpace
modules (within the main dspace bundle or not) using distinct versions of the
ORM core bundle, basically it would be possible to go further and add more
functionality to this dspace core bundle and, if needed, keep using older
versions at the main bundle (maven configuration), with this, changes in this
core bundle, would be more likely to be accepted as one wouldn't need to be
worried with his dependencies.
Related:
https://wiki.duraspace.org/display/DSPACE/Refactoring+the+DSpace+Domain+Model
http://www.mail-archive.com/[email protected]/msg08796.html
> Add basic Spring based DAOs
> ----------------------------
>
> Key: DS-1172
> URL: https://jira.duraspace.org/browse/DS-1172
> Project: DSpace
> Issue Type: Improvement
> Reporter: Robin Taylor
> Assignee: Robin Taylor
>
> A marker ticket for work being done to introduce DAOs.
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