dynamic web file maintenance reasons for development design objectives development methods code...

Dynamic Web File Maintenance

Reasons for development Design Objectives Development methods Code examples Demo


Reasons for Development– Create a highly flexible web based

environment

– Speed future development efforts

– Simplify file maintenance tasks


Design Objectives– Initially Web based but expand the

methods to other UI later– Single code source for all reference

data manipulation– Use Progress dynamic capabilities to

create a single code set for all maintenance routines


Objectives (cont’d)– Highly customizable through the use

of Super Procedures

– Build on already proven methods for dynamic data manipulation/display (DataPump etc.)


Methods– Use proper tiering of application

layers– All data access is dynamically

generated– Start at lowest level of functionality

and build up from there (bottom up approach)


Methods (cont’d)– Dynamically generate web pages

based on specific structure in the record

– Develop a single set of routines that will work for all database tables

– Super procedures for display of


Methods (cont’d)– DataPump Super procedures for data

display to allow for over ride as necessary

– All data queries use Progress’ dynamic query structure


Methods (cont’d)– Data table and key field information

are passed in the web query stream – All requests are via “Post” methods

to the web server.– “Data Acceptor” routine collects all

data and determines what routines to run


Data Acceptor Sample Codecreate buffer hfieldbuf for table filnm.case i-mode: when "dodelete" then do: run deleterec.p(input filnm, input keyfld " = " reqnum) no-error. end. /* when "dodelete" */


Data Acceptor Sample Codewhen "goadd" then do: run dispaddupd(input "add", input filnm, input keyfld, input "", input hfieldbuf, input prevcnt, input nextcnt). return. /* return prevents run of display list */ end. /* when goadd */


Run of displayrun baserun.p(input filnm, input keyfld, input wherecl, input i-mode, input nextcnt, input prevcnt, input maxreturn, input returncnt) no-error.


Future Directions Modifications to allow Web

Client/GUI display Enhance hooks for business logic

insertion

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