It depends on how the back-end systems are enabled. AS/400s, COBOL, and other legacy systems can do Web services, but they have to be augmented so they expose Web services. If they are already exposing services through RMI or Corba, than you can use those service-based interfaces instead, or translate those interfaces into Web services standards.
Dig Deeper on Topics Archive
Related Q&A from David Linthicum
David Linthicum explains what advanced business application programming (ABAP)/4 means. Continue Reading
David Linthicum defines Service Component Architecture (SCA) and Service Data Objects (SDO) and explains how to best build these components to enable... Continue Reading
David Linthicum explains how it is possible that Apache Tomcat is both a Web server and an application server. Continue Reading
Have a question for an expert?
Please add a title for your question
Get answers from a TechTarget expert on whatever's puzzling you.