lams-github / lams_common / src / java / org / lamsfoundation / lams / learningdesign

LearningDesign.java

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Last Commit: 15 Jan 24
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Thursday 07 Oct 2021
4:44 pm

Marcin Cieslak

LDEV-4411 Stop using collection cache for now

Cache annotations were commented out so we can come back to them easily

in the future.

Collection cache is not detecting changes made to entities. When a new

entity is added, collection cache does not see the change.

Properly tweaking concurrency strategy does not seem possible at the

moment, so we just turn it off.

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    ./LearningDesign.java
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Monday 27 Sep 2021
3:45 pm

Marcin Cieslak

LDEV-5248, LDEV-4411 Mark some collections as cacheable

Similar to query cache, the collection cache makes sense if the table

which collection elements map to do not change often. Each modification

to table content invalidates the given collection cache.

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Friday 24 Sep 2021
3:50 pm

Marcin Cieslak

LDEV-5248, LDEV-4411 Mark some queries as cacheable

Query cache makes sense if tables which the query reference does not

change often. Each modification to table content invalidates the given

query's cache. Also each set of query parameters is a different cache

entry, so if there are various parameter values the cache overhead can

generate more load than benefit.

Options
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Tuesday 21 Sep 2021
12:34 am

Marcin Cieslak

LDEV-5248, LDEV-4411 Add 2nd level cache to selected elements

Displaying Assessment results is too DB-intense for multiple learners.

We can enable a short-lived query cache for some entities which have

most impact on the results page. This way multiple requests can reuse

same objects from cache and there is little danger of inconsistency.

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Monday 26 Nov 2018
11:23 pm

Marcin Cieslak

LDEV-4696 Make all @ManyToOne and @OneToOne lazy

Hibernate 3 used lazy loading of single-object relationships by default.

JPA's default setting is eager. When loading entities all references are

loaded immediately using JOINs. A large entity, like Learning Design,

can have a query consisting of 25 JOINs. It makes it very slow.

There is no way to change JPA's default behaviour. In order to make JPA

annotations behave like old Hibernate, each of them got an explicit

attribute saying that loading is lazy.

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11:23 pm

Marcin Cieslak

LDEV-4696 Make all @ManyToOne and @OneToOne lazy

Hibernate 3 used lazy loading of single-object relationships by default.

JPA's default setting is eager. When loading entities all references are

loaded immediately using JOINs. A large entity, like Learning Design,

can have a query consisting of 25 JOINs. It makes it very slow.

There is no way to change JPA's default behaviour. In order to make JPA

annotations behave like old Hibernate, each of them got an explicit

attribute saying that loading is lazy.

Options
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    ./LearningDesign.java
  2. … 170 more files in changeset.
Tuesday 13 Nov 2018
12:11 am

Marcin Cieslak

LDEV-4649 Get rid of obsolete field

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Wednesday 07 Nov 2018
12:52 pm

Fiona Malikoff <Fiona.Malikoff@gmail.com>

LDEV-4696 Fixing bugs with new single activity lesson, notifications

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Friday 02 Nov 2018
10:32 pm

Marcin Cieslak

LDEV-4696 Rewrite part of Common entities to Hibernate annotations

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Wednesday 11 May 2016
3:08 pm

Marcin Cieslak

LDEV-3776: Remove $Id CVS keyword.

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Thursday 05 May 2016
4:11 pm

Marcin Cieslak

LDEV-3776: Clean up and format all LAMS Java code.

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    ./LearningDesign.java
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Wednesday 16 Mar 2016
8:14 pm

Marcin Cieslak

LDEV-3674: Remove multiple Flash elements: Authoring, icons, themes, i18n files, WDDX libraries and classes, methods, servlets etc. Rename/rewrite methods for Flashless use.

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Friday 07 Aug 2015
1:18 pm

FionaMalikoff <Fiona.Malikoff@gmail.com>

LDEV-3523: Added subtype to Learning Design

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Thursday 23 Jul 2015
9:41 am

FionaMalikoff <Fiona.Malikoff@gmail.com>

LDEV-3491: Deleting a learning design no longer removes it from the database. Now it flags removed = true. Calls to get the learning designs in the DAO layer ignore rows where removed = true. Cleaned up some methods in the DAO layer that are no longer used.

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Friday 04 Apr 2014
8:34 pm

Marcin Cieslak

LDEV-3115: Annotations saving/loading. DB structures for recently used LDs list. Duplicates of SVG icons with name pattern recognised by Flashless Authoring.

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    ./LearningDesign.java
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Saturday 18 Jan 2014
6:37 am

Andrey Balan

LDEV-3147 Simplify tools: get rid of instructions tab, define in monitor and offline activity options

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    ./LearningDesign.java
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Tuesday 25 Dec 2012
8:38 pm

Andrey Balan

LDEV-2926 * removed XDoclet tags from Java classes that generate them improperly and thus already possess static .hbm.xml files. * removed static .hbm.xml files in cases when they can be produced using Xdoclet information

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Tuesday 10 Jan 2012
11:42 pm

Marcin Cieslak

LDEV-2560: Add information about LearningDesign original author. Imported LD will have original author set to the importing user.

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    ./LearningDesign.java
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Tuesday 10 Feb 2009
9:52 am

mseaton

LDEV-2124 Fixed insert/merge bug. fixed casting error with Floating Activity.

Options
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    ./LearningDesign.java
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Tuesday 13 Jan 2009
3:01 pm

mseaton

LDEV-2074 Improved validation and added floating activities index field to Learning Design (table/class).

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Friday 19 Sep 2008
1:54 pm

dcarlier

LDEV-1909 -Competence editor backend model

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Sunday 09 Dec 2007
5:59 pm

fmalikoff

LDEV-750: Adding insert sequence into sequence functionality. Basic functionality done - still yet to do the Flash side and some security checking.

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Wednesday 09 May 2007
9:17 am

fmalikoff

Merging RAMS and Edit On Fly changes from branch to the head.

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Sunday 17 Sep 2006
2:31 pm

fmalikoff

Updated address of FSF in copyright statement

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Monday 21 Aug 2006
1:45 pm

mseaton

constructor change

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1:42 pm

mseaton

added content folder id field to learning design table + updated related dto's + added generator method for random 32 char id to authoring service + updated wddx packet handling

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Thursday 10 Aug 2006
11:25 am

fmalikoff

Remove unused lesson columns in Learning Design table

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Thursday 08 Jun 2006
9:04 am

fmalikoff

Working on Preview

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Friday 19 May 2006
11:25 am

fmalikoff

Adding a run sequence folder to a course's workspace. Fixing bugs in authoring relating to grouped activities.

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    ./LearningDesign.java
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Tuesday 04 Apr 2006
7:36 am

fmalikoff

Copyright statement change - only support GPL v2, not future versions. Missed the "version 2.0" the previous check in

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