PRAGMA POD - Pragma ADE

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1 Technology
This document describes a simple subset of the eXaMpLe typesetting framework called eXiMpLe.
This framework provides ConT E Xt users an automated typesetting environment, a user interface,
and a couple of xml related styles. It started as an example of how you can use ConT E Xt in
combination with xml, but when it became more serious, we decided to combine it with our in--
house T E X scripting environment.
The eXaMpLe framework consists of several components:
exampler This is a server application that listens to a specified TCP port and handles requests
for typesetting or processing data or documents.
exampleq
replies.
This application watches a hot folder, sends requests to the server and handles the
examplex This is one of the applications that handles the requests sent to the server. It is
controlled by scripts defining sequences, processes and commands.
examplet This program combines exampleq and exampler in a more sophisticated client--
server technology. It can handle multiple requests in parallel and transfer files over networks.
In this document we only describe the watchdog features. The eXaMpLe manual provides more
details about how to set up clients and servers, and how to define scripts that control the process.
Here we assume that ConT E Xt is used for simply processing xml using predefined scripts.
world
watched
results
scripts jobs resources
exampleq
exampler
examplex
applications
Figure 1
A rough scheme of the eXiMpLe workflow.
In figure 1 you can see how the three applications trigger each other. As soon as a request is
placed in the watched folder, it is picked up by exampleq. When it is found valid, this request is
send to exampler via a tcp/ip connection. 1
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The exampler application is listening to a dedicated port. This mechanism permits other components of the eXaMpLe
framework to communicate via an http protocol.