What is the JFreeChart code in your action that creates the chart. Perhaps you have a problem there and the chart is not getting created or the variable is not getting populated?
VJ22 wrote: > > Yes...exactly... > > We are using the standardized one...unfortunately....we are not able to > retrieve the chart of the value stack....that is why the error.... > > Tks....VJ > > > dusty wrote: >> >> Here are some JFreeChart results used in WebWork (Struts2's parent). >> >> http://www.opensymphony.com/webwork/wikidocs/JFreeChartResult.html >> >> It looks like in Struts they have formalized the JFreeChart result type: >> http://struts.apache.org/2.x/struts2-plugins/struts2-jfreechart-plugin/apidocs/index.html >> >> >> >> VJ22 wrote: >>> >>> Thanks Matt/David, >>> >>> I presume that by a servlet class you mean you flush the PNG file onto >>> the output stream which is then rendered by the JSP....We are aware of >>> that solution.... >>> >>> What we intend to use is the pull-MVC mechanism of Struts2...which helps >>> us use the getChart() method to render the chart >>> >>> Tks...Vijay >>> >>> >>> J. David Mendoza R. wrote: >>>> >>>> Hello Vijay... >>>> >>>> I'm using appfuse 1.9.4, spring and jfreechart, and what I did is, I >>>> made a servlet that uses jfreechart's tools to generate the chart as a >>>> PNG image and just present it within the JSP... This should work with >>>> any web framework... >>>> >>>> David M. >>>> >>>> VJ22 wrote: >>>>> Hello All, >>>>> >>>>> The problem that I face while integrating AppFuse with JFreeChart >>>>> >>>>> So I have a link which points to viewChart.html configured from the >>>>> menu..When I click on this link I got an action class which populates >>>>> the >>>>> chart (Unit-tests prove that the png file is generated >>>>> fine)...re-directs it >>>>> to viewChart.jsp which has got the following image code >>>>> >>>>> <image src="/viewChart.html"/> -> which I presume will get the chart >>>>> from >>>>> the action >>>>> >>>>> The problem exception happens when it tries to execute the getChart() >>>>> method...in the action class....A part of the stack-trace is attached >>>>> here >>>>> >>>>> java.lang.NullPointerException: No chart found >>>>> at >>>>> org.apache.struts2.dispatcher.ChartResult.execute(ChartResult.java:105) >>>>> at >>>>> com.opensymphony.xwork2.DefaultActionInvocation.executeResult(DefaultActionInvo >>>>> cation.java:343) >>>>> >>>>> So I assume that the chart object is being invalidated....but why ? I >>>>> assume >>>>> this uses a pull-MVC architecture...any help would be gladly >>>>> appreciated..... >>>>> >>>>> struts.xml configuration >>>>> >>>>> <package name="chart" extends="jfreechart-default"> >>>>> <action name="viewChart" >>>>> class="com.pwmliteexp1.pwmLitexp1.web.action.PWMLitePieChartAction" >>>>> scope="session"> >>>>> <result name="success" >>>>> type="chart">/WEB-INF/pages/viewChart.jsp</result> >>>>> </action> >>>>> </package> >>>>> >>>>> Thanks in advance >>>>> >>>>> Rgds....Vijay >>>>> >>>> >>>> --------------------------------------------------------------------- >>>> To unsubscribe, e-mail: [EMAIL PROTECTED] >>>> For additional commands, e-mail: [EMAIL PROTECTED] >>>> >>>> >>>> >>> >>> >> >> > > -- View this message in context: http://www.nabble.com/JfreeChart---Struts2---Appfuse-detailed-problem-report-tf3279271s2369.html#a9152565 Sent from the AppFuse - User mailing list archive at Nabble.com. --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
