McIDAS Programmer's Manual
Version 2015

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Chapter 7

Writing ADDE Servers

This chapter describes the procedures that you will use to build data servers for McIDAS-X ADDE applications. You'll learn:

• Information about McIDAS-X servers that you should know before you begin writing a server
• Steps for creating a server and the McIDAS-X library functions that you will use
• How to debug your server
• The request syntax and transmission format for each McIDAS-X data type

This chapter is organized into the following sections:

• Overview
• Getting started
  
  Client and server communication
  Rules for transmitting data
  Primary servers
  Secondary servers
  Sample data request
• Building your ADDE server
  
  McIDAS library functions
  Initializing the McIDAS-X file system
  Reading the ADDE client request
  Reading the server mapping table
  Interpreting the client request
  Retrieving the requested data from disk
  Sending the data to the client
  Ending the transaction
• Debugging servers
• Request syntax and data transmission formats
  
  Serving image data
  Serving image directory data
  Serving grid data
  Serving grid directories
  Serving point data
  Serving weather text data
  Serving observational weather-text data

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