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Wiki source code of WebObjects with Scala

Version 282.1 by Ravi Mendis on 2009/09/15 20:22
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Ravi Mendis 21.1 1 === What is Scala? ===
Ravi Mendis 195.1 2
3 Scala is a modern language not unlike Groovy.
Ravi Mendis 209.1 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.
Ravi Mendis 195.1 5
Ravi Mendis 282.1 6 |= |= Objective-C |= Java |= Scala
7 |= Mutable/Immuable Datatypes | Collections (e.g: NSArray/NSMutableArray) | No | //All datatypes//
8 |= Concurrency | Grand Central Dispatch (//extensions//) | //Threads// | Actors
9 |= Closures | (//extensions//) | No | //Built-in//
Ravi Mendis 274.1 10
Ravi Mendis 195.1 11 === Why Use Scala? ===
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Ravi Mendis 278.1 13 With Web 2.0, building concurrent WebObjects applications is a must.
Ravi Mendis 195.1 14 Developing and maintaining a concurrent or multi-threaded WebObjects application can be challenging.
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Ravi Mendis 263.1 16 Scala offers concurrency built into the language.
Ravi Mendis 280.1 17 So it may offer new solutions to allowing concurrency in WebObjects.
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Ravi Mendis 247.1 19 === Can WebObjects be Programmed With Scala? ===
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21 Yes. It is very simple.
22 Scala compiles to java bytecode. Hence using it with WebObjects is fairly straightforward.
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Ravi Mendis 247.1 24 == How to Develop WebObjects With Scala ==
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Ravi Mendis 231.1 26 1. [[Install the Scala eclipse IDE>>http://www.scala-lang.org/node/94]]
Ravi Mendis 263.1 27 1. Add Scala support to your project
Ravi Mendis 231.1 28 11. Right-click your project in the WO Explorer
29 11. In the context menu select Scala -> Add Scala Nature
30 1. Convert or use ##.scala## instead of ##.java## source
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32 {{note title="Note"}}
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Ravi Mendis 263.1 34 This is for Eclipse/WOLips developers
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36 {{/note}}
37
38 == WO Scala Example ==
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Ravi Mendis 205.1 40 The following is a mixed Java/Scala version of the WO Movies D2W app.
Ravi Mendis 195.1 41 All the EO logic and WO components are in Scala.
42 Only the Application class is Java.
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44 {{attachments patterns=".*zip"}}{{/attachments}}
45
46 === Setup ===
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48 1. Install and run the OpenBase OBMovies database.
49 1. Right-click on Application.java and run as a WOApplication (as usual).
Ravi Mendis 272.1 50
51 ==== EO Templates ====
52
53 See: [[Scala templates>>http://wiki.objectstyle.org/confluence/display/WOL/EOGenerator+Templates+and+Additions]]