System Installation
 
     
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The zde.properties file contains
The names of the JAR files that contain the ZDE environment (zeroCode.jar and zde.jar)
The servlet to start up with (udmBuilder)
The aliases for that servlet
The initialization parameters for udmBuilder
When a designer keys in the URL of the ZDE (ip_address:8080), the Apache server passes control to the udmBuilder servlet. udmBuilder processes and provides the relevant HTML pages, the validation of the data provided and the rest of the UI-related processing that the ZDE includes. The udmBuilder also invokes the relevant ZDE back-end objects (all written in Java).
 
When a site is generated, the ZDE creates a port number for that site using an internal hashing algorithm that produces a unique port # for each site. That port # is written, along with other configuration info, into the Apache configuration file (zcSiteServer.conf). The site server itself is not automatically started for each site - the designer needs to start it by clicking on the appropriate link in the ZDE.
     
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