a:mediaOutput is not compatible with a Seam long running conversation
Over the weekend I was working on a Seam project that required images to be uploaded so I took a look at the rich:fileUpload component. Looking at the RichFaces sample code it looked very straightforward and I assumed it would take just a couple of hours to implement. 2 days later I still couldn’t get it to work. I was so frustrated that I started questioning my intelligence. Fortunately I am stubborn, just ask my wife, and I refused to give up. This time it paid off. I finally found out via the Seam framework forums that the a:mediaOutput RichFaces component is not compatible with Seam long running conversations. The file was uploading fine and the listener method could see the object but when it came time for a:mediaOutput to paint the object to the screen it could not be found.
The solution was to simply add an s:conversationID component to a:mediaOutput so that Seam would know the conversation id. Once I added this everything worked fine. UGH! Below is an example.
1 2 3 4 5 6 | <a4j:mediaOutput element="img" mimeType="#{file.mime}" createContent="#{fileUploadBean.paint}" value="#{row}" style="width:100px; height:100px;" cacheable="false"> <f:param value="#{fileUploadBean.timeStamp}" name="time"/> <s:conversationId value="#{conversation.id}"/> </a4j:mediaOutput> |
These are the kind of things that drive me crazy when programming. Things like this can totally blow a schedule out of the water.
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Charles July 13th
Thank you! You save my day! lol
Brian July 13th
Glad it helped Charles.
Betto Mcrose July 16th
and you save my week =D
Brian July 17th
Betto – Glad it saved your week because it cost me a week.
Betto McRose July 17th
I also found another tip
for the FileUploaderBean I had to set the scope to conversation because there were no other way to find the back bean
I know it sounds stupid, but in the examples I found there are no comments about, just looking at the exadel’s demo page (which is the fist plate to look at) you will see
any way… God/Alá/Buda/or whatever save Internet!
=D
Rodrigo Okada July 29th
Thank you!
Brian July 29th
You are welcome Rodrigo. Glad it helped you.
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