Servlet
Example 3
The
Servlet is setup here to read both the configuration data
and the graph data from a server side processes, in this
case a Java Servlets running on our web server.
and
here is the HTML code,
<img
src="http://localhost:8080/servlet/LineGraphServlet?
config=http://www.jpowered.com/siriusjava/servlet/LineConfigServlet&
data=http://www.jpowered.com/siriusjava/servlet/LineDataServlet"
width="500" height="420">
The LineDataServlet
( click
here to view code ) is a simple servlet designed to demonstrate
how a servlet can be used to return data to either the graphing
applet or servlet. As you will see the main routine ( doGet()
) uses the method GraphData() to construct the return data.
Although in this example the GraphData() routine simply builds
the return data from 'hard coded' values, in practice this
routine would be expanded to first gather data from any number
of datasources. eg. databases, files other server processes.
Thes
LineConfigServlet ( click
here to view code ) again is just a simple servlet to
demonstrate the method. The routine ConfigData() is used
to construct the return data from 'hard coded' values. Again,
in practice this method would be expanded to derive data
from a number of datasources.
For
a full explanation of and range of values for the above
parameters please see the Documentation.
Note:
If you are using the evaluation version then in the applet
a pop-up window will appear upon the startup and an evaluation
message will be incorporated by the servlet. Both these
features have been removed from the licensed version.
Licensing information can be found at
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