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.ComponentRequestHandlerTerminat
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/Tapestry5HowToCreateGenericGraphCompo
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.dispa
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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