a4j:mediaOutput and jsf2 view scope
I am trying to upload and show an image just as in the richfaces showcase.
The upload part works fine, but I am having some problems with the ajax that should show the image.
This is the xhtml part:
<h:form>
<h:panelGroup id="profPic" layout="block">
<a4j:mediaOutput element="img" mimeType="image/png"
createContent="#{imageUpload.paint}"
style="width:100px; height:100px;" cacheable="false">
<f:param value="#{imageUpload.timeStamp}" name="time" />
</a4j:mediaOutput>
</h:panelGroup>
<rich:fileUpload fileUploadListener="#{imageUpload.listener}"
id="imageUploader" acceptedTypes="jpg, gif, png, bmp"
maxFilesQuantity="1" addLabel="Browse">
<f:ajax event="uploadcomplete" execute="@none" render="profPic"></f:ajax>
</rich:fileUpload>
</h:form>
This is my imageUploader bean:
@ManagedBean
@ViewScoped
public class ImageUpload {
private UploadedFile file;
public void paint(OutputStream stream, Object object) throws IOException {
if (file.getData() != null) {
stream.write(file.getData());
stream.close();
}
}
public void listener(FileUploadEvent event) throws Exception {
file = event.getUploadedFile();
}
public String clearUploadData() {
file = null;
return null;
}
public int getSize() {
if (file != null) {
return 1;
}
return 0;
}
public long getTimeStamp() {
return System.currentTimeMillis();
}
public void setFile(UploadedFile file) {
this.file = file;
}
public UploadedFile getFile() {
return file;
}
}
If the bean is in the view scope, the paint method won't be started. But if it is in the session scope, it will. In both scopes the timeStamp method is started.
Why is this happening? And how to make it work in view scope?
