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Wiki source code of WebObjects with Scala

Version 22.1 by Ravi Mendis on 2009/09/15 20:34
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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 |= Parametered methods | Yes (e.g: //addObject: to:_) //| No | Yes (e.g: //add(object= ,to=)//
13
14 === Why Use Scala? ===
15
16 With Web 2.0, building concurrent WebObjects applications is a must.
17 Developing and maintaining a concurrent or multi-threaded WebObjects application can be challenging.
18
19 Scala offers concurrency built into the language.
20 So it may offer new solutions to allowing concurrency in WebObjects.
21
22 === Can WebObjects be Programmed With Scala? ===
23
24 Yes. It is very simple.
25 Scala compiles to java bytecode. Hence using it with WebObjects is fairly straightforward.
26
27 == How to Develop WebObjects With Scala ==
28
29 1. [[Install the Scala eclipse IDE>>http://www.scala-lang.org/node/94]]
30 1. Add Scala support to your project
31 11. Right-click your project in the WO Explorer
32 11. In the context menu select Scala -> Add Scala Nature
33 1. Convert or use ##.scala## instead of ##.java## source
34
35 {{note title="Note"}}
36
37 This is for Eclipse/WOLips developers
38
39 {{/note}}
40
41 == WO Scala Example ==
42
43 The following is a mixed Java/Scala version of the WO Movies D2W app.
44 All the EO logic and WO components are in Scala.
45 Only the Application class is Java.
46
47 {{attachments patterns=".*zip"}}{{/attachments}}
48
49 === Setup ===
50
51 1. Install and run the OpenBase OBMovies database.
52 1. Right-click on Application.java and run as a WOApplication (as usual).
53
54 ==== EO Templates ====
55
56 See: [[Scala templates>>http://wiki.objectstyle.org/confluence/display/WOL/EOGenerator+Templates+and+Additions]]