How to use dynamic p:graphicImage with StreamedContent?

Oliver — Wed, 06 May 2015 14:40:43 -0400

I try to use a dynamic p:graphicImage with a StreamedContent object but nothing is displayed. The img tag is rendered in the html markup but with firebug I can see that the img src attribute is causing a 404 - not found error.

I'm using a similar approach as described here.

In a custom java class I'm generating a StreamedContent object from a previously uploaded image. In an ivy script block I'm assigning the return value to a dataclass attribut of type StreamedContent.

Here some code snippets:

java class MyImageUtil:
public StreamedContent retrieveImageAsSC()
{
   ...
   StreamedContent sc = new DefaultStreamedContent(inputStream, mimeType, fileName);
   return sc;
}
...
ivy script block:
in.myDataClass.streamedContent = myImageUtil.retrieveImageAsSC();
...
jsf xhtml:
p:graphicImage value="#{data.myDataClass.streamedContent}" />

The following URL is generated for the img src attribute: http://localhost:8081/ivy/faces/javax.faces.resource/dynamiccontent.properties?ln=primefaces&pfdrid=pfdrid_945697ac-ead2-49e3-af3c-4185184fe927 which isn't accessible.

After a bit of research and debugging it seems to be an ivy designer bug :).

As described over at stackoverflow you should use a method expression for the value attribute of the p:graphicImage. This method should be called twice:

while rendering the html markup so the img tag is getting generated
when the browser actually requests the image

In ivy this method is only called once. I've tested it with v5.0.16 and v5.1.4 to no avail.

As the mentioned solution from stackoverflow is working in a standalone jsf web application I assume that this is an ivy designer bug. I'm looking forward to any feedback to solve this issue.

Questions Tagged With jsf

How to use dynamic p:graphicImage with StreamedContent?