Mercurial > dive4elements > gnv-client

annotate doc/config-manual/overview.tex @ 1145:dfe1ac687c7f tip

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author Thomas Arendsen Hein <thomas@intevation.de>
date Fri, 28 Sep 2012 12:16:15 +0200
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1 \section{Overview of the GNV-Server}
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2
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3 \subsection{Tasks and Components of the GNV-Server}
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4
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5 The GNV-server is a middleware-component and consists of two functional
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6 components:
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7 \begin{enumerate}
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8 \item artifact-server -- providing access to the database and
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9 managing the users' workflow to the GNV-WebClient
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10 \item mapserver -- providing user-generated maps. Mapserver is
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11 controlled by the artifact-server.
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12 \end{enumerate}
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13
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14 %% TODO includegraphics
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16 The central concept of the artifact-server is to model the workflow of
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17 users by the following steps:
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18 \begin{enumerate}
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19 \item selection of data (parameterization)
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20 \item processing of result sets (interpolation, clipping)
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21 \item exporting processed result sets (charts, statistics, raw data)
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22 \end{enumerate}
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23
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24 Within the artifact-server, these steps are supported by the following
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25 core components for the entire GNV-system. The naming refers to
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26 components used in the configuration. In order to simplify a first
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27 orientation in the configuration and this manual, the XML-tags/words in
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28 the central configuration file at {\tt conf/conf.xml} are used. They are
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29 marked in {\tt typewriter} style:
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30
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31 \begin{itemize}
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32 \item {\tt geo-backend} -- access to the database backend
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33 \item {\tt rest-server} -- providing a RESTful-Interface with a
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34 XML-based protocol to serve the expert information systems (FIS) with
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35 their products to different clients, e.g. GNV WebClient
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36 \item {\tt factories/*}, {\tt artifacts/*} -- managing the steps and
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37 operations of users' workflow for all expert information
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38 systems (FIS)
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39 \item {\tt gnv} -- processing pipeline providing results of the
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40 products with the following subtasks:
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41 \begin{itemize}
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42 \item processing of result sets like interpolation, clipping
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43 \item visualization of charts and maps
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44 \item exporting selected raw data
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45 \end{itemize}
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46 \item {\tt mapserver} -- managing the Web Map Service for creating maps
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47 dynamically
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48 \end{itemize}
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49
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50 Each component has a specific configuration for its functionality and
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51 subsystems.
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52
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53 \subsection{Internal Structure of the GNV-Server}
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54
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55 \subsubsection{Internal Structure of Artifact-Server}
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56 Per default the artifact-server can be found at {\tt
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57 /opt/artifact-server}\footnote{Information about installation and
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58 operation can be found in the admin-manual.}. The internal directory
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59 structure of the artifact-server looks like this:
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60
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61 %% tree /opt -d -L1
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62 \begin{lstlisting}
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63 artifact-server
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64 |-- artifactdb # storing artifacts in a database
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65 |-- bin # binaries including all libraries
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66 |-- cache # storage for cached data (e.g. result sets)
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67 |-- conf # central configuration of artifact-server
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68 |-- install # files for system integration (just for setup)
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69 |-- mapfiles # generated configurations for map-server (done by
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70 # map-generator)
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71 `-- shapefiles # raw data for map generating (done by map-generator)
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72 \end{lstlisting}
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73
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74
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75 \subsubsection{Internal Structure of Mapserver}
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76 Per default the mapserver can be found at {\tt
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77 /usr/lib/cgi-bin}.\footnote{Information about installation and
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78 operation can be found in the admin-manual.} The internal structure of
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79 the mapserver looks like this:
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80
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81 %% tree /usr/lib/
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82 \begin{lstlisting}
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83 cgi-bin/
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84 |-- gnv-wms # wrapper pointing to the configuration (default:
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85 # artifact-server/mapfiles/mapfile.map), invoked by
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86 # webserver
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87 `-- mapserv-gp # binary of mapserver, invoked by wrapper
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88 \end{lstlisting}
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