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Developers Meeting on Weds, Aug 9, 2017

 

Today's Meeting Times

Agenda

Quick Notes / Reminders

  • NEXT DSpace 7 UI MEETING: TOMORROW, Aug 10 at 15:00 UTC (11:00am EDT) in Google Hangouts

Discussion Topics

  1. DSpace 6.2 Immediate Release to fix Hibernate issues:

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    5. Any other very obvious wins to "dspace-6_x" branch? https://github.com/DSpace/DSpace/pulls?utf8=%E2%9C%93&q=is%3Apr%20is%3Aopen%20base%3Adspace-6_x%20
  2. Discussion of DB Connections in DSpace 6 (Hibernate) vs DSpace 5. (More notes at DSpace Database Access)
    1. In DSpace 5, each "Context" established a new DB connection. Context then committed or aborted the connection after it was done (based on results of that request).  Context could also be shared between methods if a single transaction needed to perform actions across multiple methods.
    2. In DSpace 6, Hibernate manages the DB connection pool.  Each thread grabs a Connection from the pool. This means two Context objects could use the same Connection (if they are in the same thread). In other words, code can no longer assume each new Context() is treated as a new database transaction.
      1. This is what we saw in DS-3659, two separate Context objects used the same connection, and one accidentally rolled back the changes of a previous Context (because they were in the same thread).
      2. Should we be making use of SessionFactory.openSession() for READ-ONLY Contexts (or any change of Context state) to ensure we are creating a new Connection (and not simply modifying the state of an existing one)?  Currently we always use SessionFactory.getCurrentSession() in HibernateDBConnection, which doesn't guarantee a new connection: https://github.com/DSpace/DSpace/blob/dspace-6_x/dspace-api/src/main/java/org/dspace/core/HibernateDBConnection.java

  3. DSpace High Priority Tickets

    1. High Priority (Blocker, Critical or Major) and flagged for release

      key summary type created updated assignee reporter priority status fixversions

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    2. Need Code Review, Flagged for Release

      key summary type created updated assignee reporter priority status fixversions

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  4. DSpace + Spring: Slack Discussion on whether DSpace codebase should move more towards the Spring way of doing things (e.g. Dependency Injection via beans) or the traditional DSpace patterns (e.g. classloaders with little DI).
    1. This was asked on dspace-devel: https://groups.google.com/d/msg/dspace-devel/oBWibfQUXzI/y05K-wpLAgAJ
  5. DS-3372 and DS-3587: discussion required, should we add more SQL dialect support? MySQL, MS SQL? Are we ready to support, test and maintain these dialects in the future?
    1. Also asked on dspace-devel: https://groups.google.com/d/msg/dspace-devel/UfTU7AFZjs0/UOgiSnJKAgAJ
  6. Other Tickets needing discussion (Please feel free to add any you wish to discuss under this topic)
  7. Reviewing JIRA Tickets or PRs
    1. Please feel free to bring any that need eyes / immediate discussion
    2. JIRA Backlog of "Received" tickets
    3. All open PRs

Ticket Summaries

  1. Help us test / code review! These are tickets needing code review/testing and flagged for a future release:

    key summary type created updated assignee reporter priority status fixversions

    Unable to locate Jira server for this macro. It may be due to Application Link configuration.

  2. Newly created tickets this week:

    key summary type created assignee reporter priority status

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  3. Old, unresolved tickets with activity this week:

    key summary type created updated assignee reporter priority status

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  4. Tickets resolved this week:

    key summary type created assignee reporter priority status resolution

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  5. Tickets requiring review. This is the JIRA Backlog of "Received" tickets: 

    key summary type created updated assignee reporter priority

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Meeting Notes

Meeting Transcript

 

1 Comment

  1. Terrence W Brady

    As a follow up to today's meeting, I created a first draft proposal related to Active Branch Cloud Instances: Proposal: Create Cloud Instances for DSpace Active Branches

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