added GDL VM

report.lyx

@@ -1,4 +1,4 @@
-#LyX 1.6.7 created this file. For more info see http://www.lyx.org/
+#LyX 1.6.9 created this file. For more info see http://www.lyx.org/
 \lyxformat 345
 \begin_document
 \begin_header
@@ -862,7 +862,17 @@ One important factor of any server is the availability.
 
 \begin_layout Standard
 There are several good papers on how to migrate whole virtual machines between
- nodes to replicate them but for the GGS a different approche has been chosen.
+ nodes to replicate them
+\begin_inset Note Note
+status open
+
+\begin_layout Plain Layout
+Add more information about that
+\end_layout
+
+\end_inset
+
+ but for the GGS a different approche has been chosen.
  Instead of just duplicating a virtual machine, the programming language
  Erlang has been used which offers several features to increase the availability.
  Some of them are 
@@ -1332,6 +1342,148 @@ We only support languages running in a sandboxed environment.
 Encryption
 \end_layout
 
+\begin_layout Section
+Game Development Language in a Virtual Machine
+\end_layout
+
+\begin_layout Standard
+There is only a very limited number of game developers who would like to
+ write their games in Erlang, therefore we had to come up with something
+ to resolve this problem.
+ The main idea was to offer a replacable module which would introduce a
+ interface to different virtual machines which would run the game code.
+ This way a game developer can write the game in his favourite language
+ while the server part still is written in Erlang and can benefit from all
+ of its advantages.
+\end_layout
+
+\begin_layout Subsection
+JavaScript
+\end_layout
+
+\begin_layout Standard
+JavaScript has gained a lot of popularity lately, it is used in large projects
+ such as 
+\emph on
+Riak
+\emph default
+
+\begin_inset Foot
+status open
+
+\begin_layout Plain Layout
+\begin_inset Flex URL
+status collapsed
+
+\begin_layout Plain Layout
+
+http://wiki.basho.com/An-Introduction-to-Riak.html
+\end_layout
+
+\end_inset
+
+
+\end_layout
+
+\end_inset
+
+, 
+\emph on
+CouchDB
+\emph default
+
+\begin_inset Foot
+status open
+
+\begin_layout Plain Layout
+\begin_inset Flex URL
+status collapsed
+
+\begin_layout Plain Layout
+
+http://couchdb.apache.org
+\end_layout
+
+\end_inset
+
+
+\end_layout
+
+\end_inset
+
+.
+ On the popular social coding site 
+\emph on
+GitHub.com
+\emph default
+, 18%
+\begin_inset Foot
+status open
+
+\begin_layout Plain Layout
+during the writing of the thesis the percentage went up to 19% 
+\begin_inset Flex URL
+status collapsed
+
+\begin_layout Plain Layout
+
+https://github.com/languages/
+\end_layout
+
+\end_inset
+
+
+\end_layout
+
+\end_inset
+
+ of all code is written in JavaScript.
+ The popularity of JavaScript in the programming community, in combination
+ with the availability of several different JavaScript virtual machines
+ was an important influence in choosing JavaScript as the main control language
+ for our GGS prototype.
+\end_layout
+
+\begin_layout Subsection
+Other languages
+\end_layout
+
+\begin_layout Standard
+Other languages like 
+\emph on
+lua
+\emph default
+, 
+\emph on
+ActionScript
+\emph default
+ are suitable as well because there is a virtual machine for each of them
+ which can be 
+\begin_inset Quotes eld
+\end_inset
+
+plugged in
+\begin_inset Quotes erd
+\end_inset
+
+ into our GDL VM interface.
+ With help of the 
+\emph on
+Java Virtual Machine
+\emph default
+ or the 
+\emph on
+.NET 
+\emph default
+environment it is even possible to run nearly every available programming
+ language in a sandbox as a GDL.
+\end_layout
+
+\begin_layout Standard
+Due lack of time we have decided to use just the Erlang <-> JavaScript bridge
+ with our interface.
+\end_layout
+
 \begin_layout Chapter
 Practice
 \begin_inset Note Note
@@ -1637,7 +1789,7 @@ Problems
 \end_layout
 
 \begin_layout Section
-erlang_js 
+erlang_js
 \end_layout
 
 \begin_layout Standard