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Changes for page WebObjects and Squeryl

Last modified by Ravi Mendis on 2011/04/01 11:14
From version 154.1
edited by Ravi Mendis
on 2010/11/09 23:42
Change comment: There is no comment for this version
To version 150.1
edited by Ravi Mendis
on 2010/11/10 03:18
Change comment: There is no comment for this version

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3 3  Advantages of Squeryl over EOF:
4 4  
5 5  * Concurrent
6 -* Spawns multiple database connections
7 -* Issues database transactions concurrently
6 +** Spawns multiple database connections
7 +** Issues database transactions concurrently
8 8  * Scala Actor compatible
9 -* Immutable object model/graph
9 +** Immutable object model/graph
10 10  * Strongly-typed
11 -* Better suited for business "logic". E.g: avoiding ##UnknownKeyException##
11 +** Better suited for database/business "logic".
12 + E.g: Exploits the compiler and IDE to catch exceptions at compile time rather than at run-time.
12 12  * Uses Scala (functional) collection classes
14 +
15 += Migrating EOF -> Squeryl =
16 +
17 +In keeping with the strong-typed philosophy of Scala, Squeryl has no dynamic component like EOF (i.e an EO model file).
18 +
19 +EOF has the ability to generate classes in Java (and in Objective-C prior to WebObjects 4.5) as enforcing type has become customary in enterprise environments. We may exploit this feature of EOF to generate a Squeryl schema.
20 +
21 +=== Preparing your EO model ===
22 +
23 +1. Make sure **all** EO entities have a class name (including abstract many-To-many "join" tables). There's no support for entities marked as ##EOGenericRecord##.
24 +1. (Temporary) Ensure all EO entities are in the same package
25 +
26 +=== Generating the Squeryl Schema ===
27 +
28 +1. Create a .eogen file for your EO model as normal. Only set the ##File Names## extension to "scala".
29 +1. Use the Squeryl EO Templates:
30 +
31 +*
32 +** Entity.eotemplate [[template>>WOL:Squeryl _Entity.eotemplate]]
33 +** Entity.eotemplate [[template>>WOL:Squeryl Entity.eotemplate]]
34 +
35 +{{note title="Note"}}
36 +
37 +Any custom business "logic" will have to be manually re-written in Scala
38 +
39 +{{/note}}