By: aathishankaran Emailed: 1768 times Printed: 2515 times
modules make it possible to divide the application development and deployment
process into distinct roles so that different people or companies can perform
different parts of the process.
first two roles involve purchasing and installing the J2EE product and tools.
Once software is purchased and installed, J2EE components can be developed by
application component providers, assembled by application assemblers, and
deployed by application deployers.
a large organization, different individuals or teams might execute each of these
roles. This division of labor works because each of the earlier roles outputs a
portable file that is the input for a subsequent role.
example, in the application component development phase, an enterprise bean
software developer delivers EJB JAR files. In the application assembly role,
another developer combines these EJB JAR files into a J2EE application and saves
it in an EAR file. In the application deployment role, a system administrator at
the customer site uses the EAR file to install the J2EE application into a J2EE
people do not always execute the different roles. If you work for a small
company, for example, or if you are prototyping a sample application, you might
perform the tasks in every phase.
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