Support data updates about lenskit

Michael Ekstrand [email protected] on 2011-03-24 16:30:41 said:

In [f36e22528b7a872d30427b2082adfa406f008599]:

Make packed build context a singleton by default (refs #16).

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Created by grouplens on 2013-02-01T21:38:49.792190+00:00, last updated: None

Michael Ekstrand [email protected] on 2011-03-24 16:30:40 said:

In [2a3e5d0db9325e8f7d7a7149fc274ed4d1b8559b]:

Fix off-by-one error in the index manager (refs #16)

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Created by grouplens on 2013-02-01T21:38:49.438909+00:00, last updated: None

Michael Ekstrand [email protected] on 2011-03-24 16:30:39 said:

In [062c134e842b6472f9572a2f1e3c72e393c56d64]:

Introduce the BuildContext interface (refs #16)

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Created by grouplens on 2013-02-01T21:38:49.058689+00:00, last updated: None

Michael Ekstrand [email protected] on 2011-03-24 16:30:35 said:

In [c4af13ce3609ce27b5a1841e22818cd482676529]:

Clean up RatingDataAccessObject & subclasses (refs #16).

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Created by grouplens on 2013-02-01T21:38:48.707250+00:00, last updated: None

Michael Ekstrand [email protected] on 2011-03-24 16:30:33 said:

In [9a223006c139f0c0a0d624c2a7c4f2927811dcac]:

Start refactoring data sources into data access objects (references #16)

* Rename data sources to data access objects
* Drop closability from DAOs

Still need to rename implementations, implement the build context, etc.

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Created by grouplens on 2013-02-01T21:38:48.338242+00:00, last updated: None

ekstrand on 2011-03-23 16:52:38 said:

Further updates on this. We're building a data access object that provides access to ratings, update notifications, etc., and a separate BuildContext to provide snapshot access for recommender-building purposes.

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Created by grouplens on 2013-02-01T21:38:47.991625+00:00, last updated: None

ekstrand on 2011-03-22 21:12:14 said:

The current data access facility makes the guarantee that a rating source is transactionally protected from mutation so that multiple pass can be taken over the data. Just using a data store that gives cursors is not a sufficient solution as it over-relaxes this assumption.

Therefore, we probably need a data storage subsystem to return data sources and support the mutation notification.

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Created by grouplens on 2013-02-01T21:38:47.629237+00:00, last updated: None

ekstrand on 2011-03-17 19:25:29 said:

I spent a while talking to mludwig about this today, and we have a working plan.

The crux of the matter is to change DataSource to DataStore or some such, make it a singleton, and disconnect it from connection management. Cursors will be retrieved and closed; it is up to the data store and/or surrounding code to get them from an appropriate location and ensure that the shared connection, if there is one, is properly closed.

The DataSource, then, will manage listeners to notify other components, such as caches or models, of data changes. This will facilitate updating caches, etc.

We'll still need to work out how to handle rebuilding models that don't need to be rebuilt on their own, such as rebuilding a cached user-user model against an updated pre-computed baseline. But that seems to be a solvable problem, at least with customized providers.

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Created by grouplens on 2013-02-01T21:38:47.290117+00:00, last updated: None

Michael Ekstrand [email protected] on 2011-03-24 16:30:47 said:

In [277feab9c48557047a711416d1565ea594fedea7]:

Implement rating update framework and rename DAOs (closes #16).

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Created by grouplens on 2013-02-01T21:38:46.958327+00:00, last updated: None

Michael Ekstrand [email protected] on 2011-03-24 16:30:45 said:

In [f7edb2e34cc086706417e0794b7a908af174239a]:

Rename DAO implementations (refs #16).

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Created by grouplens on 2013-02-01T21:38:46.588165+00:00, last updated: None

Michael Ekstrand [email protected] on 2011-03-24 16:30:42 said:

In [bc3b6274e98c5db9bb430ddb1464a447198b03ba]:

Move DAO classes into their own package (refs #16).

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Created by grouplens on 2013-02-01T21:38:45.463797+00:00, last updated: None

Michael Ekstrand [email protected] on 2011-03-24 16:30:42 said:

In [faf6080ce0e1c750c936e0a03749ca7d3841312f]:

Finish implementing BuildContext and make item-item build correctly use it (refs #16).

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Created by grouplens on 2013-02-01T21:38:45.080020+00:00, last updated: None