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Wiki source code of WebObjects with Scala

Version 23.1 by Ravi Mendis on 2009/09/15 20:26
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1 === What is Scala? ===
2
3 Scala is a modern language not unlike Groovy.
4 It is said to be more powerful (and faster) than Groovy or Rails which has been the reason for its adoption at sites like Twitter.
5
6 |= |= Objective-C |= Java |= Scala
7 |= Mutable/Immuable Datatypes |Collections (e.g: //NSArray/NSMutableArray//) | No | //All datatypes//
8 |= Closures | (//extensions//) | No | //Built-in//
9 |= Static variables | Yes | Yes | No
10 |= Static methods/functions | Yes | Yes | No
11 |= Concurrency | Grand Central Dispatch (//extensions//) | //Threads// | Actors
12
13 === Why Use Scala? ===
14
15 With Web 2.0, building concurrent WebObjects applications is a must.
16 Developing and maintaining a concurrent or multi-threaded WebObjects application can be challenging.
17
18 Scala offers concurrency built into the language.
19 So it may offer new solutions to allowing concurrency in WebObjects.
20
21 === Can WebObjects be Programmed With Scala? ===
22
23 Yes. It is very simple.
24 Scala compiles to java bytecode. Hence using it with WebObjects is fairly straightforward.
25
26 == How to Develop WebObjects With Scala ==
27
28 1. [[Install the Scala eclipse IDE>>http://www.scala-lang.org/node/94]]
29 1. Add Scala support to your project
30 11. Right-click your project in the WO Explorer
31 11. In the context menu select Scala -> Add Scala Nature
32 1. Convert or use ##.scala## instead of ##.java## source
33
34 {{note title="Note"}}
35
36 This is for Eclipse/WOLips developers
37
38 {{/note}}
39
40 == WO Scala Example ==
41
42 The following is a mixed Java/Scala version of the WO Movies D2W app.
43 All the EO logic and WO components are in Scala.
44 Only the Application class is Java.
45
46 {{attachments patterns=".*zip"}}{{/attachments}}
47
48 === Setup ===
49
50 1. Install and run the OpenBase OBMovies database.
51 1. Right-click on Application.java and run as a WOApplication (as usual).
52
53 ==== EO Templates ====
54
55 See: [[Scala templates>>http://wiki.objectstyle.org/confluence/display/WOL/EOGenerator+Templates+and+Additions]]