Let us assume the following (standard) scenario in which Cewolf
+might be a solution.
+You have a running web application and you want to know which pages are
+most visited by your users. You want to have a vertical bar chart which
+looks like the one below
+
If you have not yet downloaded the Cewolf distribution, this is the
+point when you should do it (look at Download). Put the cewolf.jar file into your
+web application's /WEB-INF/lib directory.
+That should be all you have to do to prepare your application for
+Cewolf usage. If you encounter any problems in using the Cewolf tags
+(e.g. "No Tags" is displayed in your containers console) you can
+additionally put the cewolf.tld file from the distribution's etc
+directory into a directory of your choice under your web application's
+root and reference this file as the cewolf tag library from your JSPs.
As Cewolf uses a MVC (Model-View-Control) approach the data which +are shown in your chart are separated from the view defined in the JSP +page. So you can change them separately. To provide the chart with the +correct data you must provide an object which implements the interfacede.laures.cewolf.DatasetProducer. +This object is asked to produce data every time a chart is rendered. +Below you see an implementation of a DatasetProducer which could be used +to provide data needed for our example scenario.
++to be continued ... +
<%@page contentType="text/html"%>+
<%@taglib uri='/WEB-INF/cewolf.tld' prefix='cewolf' %>
<jsp:useBean id="pageViews" class="de.laures.cewolf.example.PageViewCountData"/>
<cewolf:chart
id="horizontalBarChart"
title="HorizontalBarChart"
renderer="servlet/chart"
width="300" height="300"
type="horizontalBar"
xAxisLabel="Page"
yAxisLabel="Views">
<cewolf:data producer="pageViews" />
</cewolf:chart>