Yes it seems to be valid. I wrote some lines of code which saves the image to a
file before returning the stream just to see if the stream returned belongs to
image. And image file is created correctly.
Somehow I cannot redirect to stream to page, although it actually is created..
-----Original Message-----
From: Chuck Kring [mailto:cjkr...@pacbell.net]
Sent: Friday, August 13, 2010 2:08 AM
To: users@tapestry.apache.org
Subject: Re: Stream redirection problem when using JFreeChart with Tapestry
Did you verify that the _context in onChart() is valid?
On 8/12/2010 1:45 PM, Ruksen Inanir wrote:
> Thanks for the response. I had not post the Chart component to keep
> the mail shorter. But here it is;
>
> public class Chart {
> @Inject
> private ComponentResources _resources;
> @Inject
> private TypeCoercer _coercer;
> /**list(array) of paired values(label& value):
> [String,Number,String,Number,...]*/
> @Parameter(required=true)
> private JFreeChart _chart;
> @Persist
> private JFreeChart _context;
> @Parameter(required=true)
> private int _width;
> @Parameter(required=true)
> private int _height;
>
> void beginRender(MarkupWriter writer)
> {
> _context=_chart;
> Object[] params = { new Integer(_width),
> new Integer(_height) };
>
> //generate action link
> Link link = _resources.createEventLink("chart", params);
> Element img = writer.element("img", "src", link);
> _resources.renderInformalParameters(writer);
> }
>
> void afterRender(MarkupWriter writer)
> {
> writer.end();
> }
>
> public StreamResponse onChart(final int width, final int height/*,
> Object ...rest*/){
> return new StreamResponse(){
> public String getContentType(){
> return "image/jpeg";
> }
> public InputStream getStream() throws IOException {
> BufferedImage image = _context.createBufferedImage(width,
> height);
> ByteArrayOutputStream byteArray = new
> ByteArrayOutputStream() ;
> ChartUtilities.writeBufferedImageAsJPEG(byteArray, image) ;
> return new ByteArrayInputStream(byteArray.toByteArray());
> }
> public void prepareResponse(Response response){}
> };
> }
> }
>
>
> -----Original Message-----
> From: Chuck Kring [mailto:cjkr...@pacbell.net]
> Sent: Thursday, August 12, 2010 11:32 PM
> Cc: Tapestry users
> Subject: Re: Stream redirection problem when using JFreeChart with
> Tapestry
>
>
> A few things:
>
> 1) You didn't include the chart component. It's the thing that is generating
> the exception.
>
> 2) I would verify that _context in getStream() is a valid JFreeChart
> and that ChartUtils.writeBufferedImageAsJpeg works correctly. I
> suspect that a problem with the chart is causing getStream() to fail, which
> then causes the Chart onChart() event to not return a StreamResponse.
>
> I generate charts in a slightly different manner than this example:
>
> a) I use Chart as a base object and extend Chart for my individual
> chart types. For example, I don't call<t:chart t:chart=lineChart>
> but use MyLineChart extends Chart and call<t:myLinerChart
> nodeId="...">
>
> b) The code to create the chart is in the derived class rather than the page
> class. I don't pass the serialized chart object to the client as a context.
> Rather, the context contains the identity of the object to be charted - in my
> case a nodeId - and the chart is generated by the
> component rather than the page. One benefit of this approach is it
> allows me to use the same chart on different pages.
>
> c) I personally like PNG as an output format rather than JPEG.
>
> Once again, make sure that the actual chart is working correctly.
>
> Chuck
>
> public class MyParticularChart extends Chart{
>
> private static final Logger logger =
> Logger.getLogger("gateway.components.MyParticularChart ");
>
> public StreamResponse onChart(short id, long timestamp)
> {
> BSU bsu = (BSU)Node.getByNodeId(id);
> ArrayList<Motecomm> list =
> MotecommCache.getInstance().getList(bsu, getTimeService(),
> getSession());
>
> synchronized(ChartMutex.getMutex()){
>
> TimeSeriesCollection dataset = new TimeSeriesCollection();
> addBSUTimeSeries(bsu.getIdleVariance(), list, dataset);
>
>
> final JFreeChart chart = ChartFactory.createTimeSeriesChart(
> null, // title
> null, // x-axis label
> null, // y-axis label
> null, // data
> true, // create legend?
> false, // generate tooltips?
> false // generate URLs?
> );
>
> XYItemRenderer r = chart.getXYPlot().getRenderer();
> r.setSeriesPaint(0, Color.darkGray);
> r.setSeriesPaint(1, Color.RED);
> r.setSeriesPaint(2, Color.GREEN);
> r.setSeriesPaint(3, Color.GRAY);
>
> XYPlot plot = chart.getXYPlot();
> plot.setRangeAxisLocation(1, AxisLocation.BOTTOM_OR_RIGHT);
> NumberAxis axis = new NumberAxis("");
> axis.setRange(new Range(0,4 * bsu.getIdleVariance()), true,
> false );
> plot.setRangeAxis(0, axis);
> plot.setDataset(1,dataset);
>
> return new StreamResponse(){
> public String getContentType(){
> return "image/png";
> }
> public InputStream getStream() throws IOException {
> BufferedImage image = chart.createBufferedImage(500,
> 175);
> ByteArrayOutputStream byteArray = new
> ByteArrayOutputStream() ;
>
> ChartUtilities.writeBufferedImageAsPNG(byteArray,
> image) ;
> return new
> ByteArrayInputStream(byteArray.toByteArray());
> }
> public void prepareResponse(Response response){}
> };
> }
> }
>
> On 8/12/2010 11:53 AM, Ruksen Inanir wrote:
>> Hi,
>> I placed the the exact same Chart.java from
>> http://wiki.apache.org/tapestry/Tapestry5HowToCreateGenericGraphComponent
>> under the package 'com.mycompany.myproject.webapp.components'. My tapestry
>> version is 5.1.0.5. And I use jfreechart 1.0.12.
>>
>> here is my \src\main\webapp\reports\LineChartPage.tml;
>>
>> <html xmlns:t="http://tapestry.apache.org/schema/tapestry_5_0_0.xsd";>
>> <body>
>> <h1>Line Chart</h1>
>> <t:chart width="200" height="150" chart="lineChart"/>
>> </body>
>> </html>
>>
>> And below is the LineChartPage.java under package
>> com.mycompany.myproject.webapp.pages.reports;
>>
>> public class LineChartPage {
>> public JFreeChart getLineChart() {
>> XYSeries series = new XYSeries("Average Size");
>> series.add(20.0, 10.0);
>> series.add(40.0, 20.0);
>> series.add(70.0, 50.0);
>> XYDataset xyDataset = new XYSeriesCollection(series);
>> final JFreeChart chart = ChartFactory.createXYLineChart
>> ("Sample XY Chart", // Title
>> "Height", // X-Axis label
>> "Weight", // Y-Axis label
>> xyDataset, // Dataset
>> PlotOrientation.HORIZONTAL,
>> true, // Show legend
>> true, // Tooltips
>> true // Urls
>> );
>>
>> return chart;
>> }
>> }
>>
>> Everything seems to be right but I get the exception; 20:39:44,240
>> ERROR [RequestExceptionHandler] Processing of request failed with uncaught
>> exception: Sanity check - neither a stream response nor a redirect response
>> was generated for this action request.
>> java.lang.IllegalStateException: Sanity check - neither a stream response
>> nor a redirect response was generated for this action request.
>> at
>> org.apache.tapestry5.internal.services.ImmediateActionRenderResponseFilter.handle(ImmediateActionRenderResponseFilter.java:63)
>> at
>> $ComponentEventRequestHandler_12a675b8084.handle($ComponentEventRequestHandler_12a675b8084.java)
>> at
>> org.apache.tapestry5.internal.services.AjaxFilter.handle(AjaxFilter.java:42)
>> at
>> $ComponentEventRequestHandler_12a675b8084.handle($ComponentEventRequestHandler_12a675b8084.java)
>> at
>> org.apache.tapestry5.upload.internal.services.UploadExceptionFilter.handle(UploadExceptionFilter.java:75)
>> at
>> $ComponentEventRequestHandler_12a675b8084.handle($ComponentEventRequestHandler_12a675b8084.java)
>> at
>> org.apache.tapestry5.services.TapestryModule$36.handle(TapestryModule.java:2164)
>> at
>> $ComponentEventRequestHandler_12a675b8084.handle($ComponentEventRequestHandler_12a675b8084.java)
>> at
>> $ComponentEventRequestHandler_12a675b7fca.handle($ComponentEventRequestHandler_12a675b7fca.java)
>> at
>> org.apache.tapestry5.internal.services.ComponentRequestHandlerTermina
>> t
>> or.handleComponentEvent(ComponentRequestHandlerTerminator.java:43)
>>
>>
>>
>> -----Original Message-----
>> From: Chuck Kring [mailto:cjkr...@pacbell.net]
>> Sent: Tuesday, August 10, 2010 8:28 PM
>> To: users@tapestry.apache.org
>> Subject: Re: Stream redirection problem when using JFreeChart with
>> Tapestry
>>
>>
>> Hi.
>>
>> I use JfreeChart extensively with T 5.0.1.5 and I'm very happy with
>> it. Most likely your exception is caused by a bug in your .tml or the
>> underlying class. If you could reduce the template and the class to
>> the minimum size that still shows the bug and post both to a follow up
>> email, somebody on the list will probably be able to help you.
>>
>> Chuck
>>
>> On 8/10/2010 2:10 AM, Ruksen Inanir wrote:
>>> Hi,
>>> I want to display a line-chart for my application. I tested
>>> chenille-kit chart component it worked quite good, but it does not
>>> support Dates on the x-axis. I want to to draw time-series on the
>>> chart. So I decided to use JFreeChart. The link
>>> http://wiki.apache.org/tapestry/Tapestry5HowToCreateGenericGraphComp
>>> o n ent describes the usage of JFreeChart with Tapestry. I used to
>>> code as it is, I put the Chart.java under components package,
>>> Prepared the LineChartPage.java and LineChartPage.tml. The page
>>> rendered, displayed but the chart is not displayed. When I look at
>>> the Jboss console I saw the "neither a stream response nor a
>>> redirect response was generated for this action request." exception;
>>>
>>> [org.apache.tapestry5.services.TapestryModule.RequestExceptionHandler]
>>> Processing of request failed with uncaught exception: Sanity check -
>>> neither a stream response nor a redirect response was generated for this
>>> action request.
>>> java.lang.IllegalStateException: Sanity check - neither a stream response
>>> nor a redirect response was generated for this action request.
>>> at
>>> org.apache.tapestry5.internal.services.ImmediateActionRenderResponseFilter.handle(ImmediateActionRenderResponseFilter.java:63)
>>> at
>>> $ComponentEventRequestHandler_12a5b36106e.handle($ComponentEventRequestHandler_12a5b36106e.java)
>>> at
>>> org.apache.tapestry5.internal.services.AjaxFilter.handle(AjaxFilter.java:42)
>>> at
>>> $ComponentEventRequestHandler_12a5b36106e.handle($ComponentEventRequestHandler_12a5b36106e.java)
>>> at
>>> org.apache.tapestry5.upload.internal.services.UploadExceptionFilter.handle(UploadExceptionFilter.java:75)
>>> at
>>> $ComponentEventRequestHandler_12a5b36106e.handle($ComponentEventRequestHandler_12a5b36106e.java)
>>> at
>>> org.apache.tapestry5.services.TapestryModule$36.handle(TapestryModule.java:2164)
>>> at
>>> $ComponentEventRequestHandler_12a5b36106e.handle($ComponentEventRequestHandler_12a5b36106e.java)
>>> at
>>> $ComponentEventRequestHandler_12a5b361006.handle($ComponentEventRequestHandler_12a5b361006.java)
>>> at
>>> org.apache.tapestry5.internal.services.ComponentRequestHandlerTerminator.handleComponentEvent(ComponentRequestHandlerTerminator.java:43)
>>> at
>>> $ComponentRequestHandler_12a5b360ff8.handleComponentEvent($ComponentRequestHandler_12a5b360ff8.java)
>>> at
>>> org.apache.tapestry5.internal.services.ComponentEventDispatcher.disp
>>> a
>>> t
>>> ch(ComponentEventDispatcher.java:46)
>>>
>>> Did anyone encountered this exception? Or do you have any idea of the
>>> cause? Or a better solution to display time-series charts, which contain
>>> time information on x-axis.
>>>
>>> Regars,
>>> Ruksen
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>>>
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