Hi David, I follwed the posts and I excatly need what you have already done, how to use the JFree Charts Plugin with Appfuse to generate charts. Could yopu please give me some steps on as to how to do that.
Thanks Ujjala dusty wrote: > > 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#a13451376 Sent from the AppFuse - User mailing list archive at Nabble.com. --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
