Re: Resource/SharedResource - Display an image
Hello, no I am not using any AJAX with this form. I only get the resource and set it in an Image component. Maybe the uploaded picture is not persistet fast enough to be available on the response... Ok, I thank you for your help. greetings Roland Huss wrote: Hi, greeklinux wrote: your solution works. But the problem is that I am already registering the resource in an Initializer. But ok... When you bind a resource reference to an application, it's not about registering the resource itself but looking it up. My fault. greeklinux wrote: Now I am uploading the picture and after the reload, I see the standard pic. After a site refresh I am seeing the uploaded pic. Do I have to set any headers? Though I don't know your setup, but you need to refresh your image component (i.e. if it is done via an Ajax request). No headers needs to be set here. ... roland -- View this message in context: http://www.nabble.com/Resource-SharedResource---Display-an-image-tp18348115p18401931.html Sent from the Wicket - User mailing list archive at Nabble.com. - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: Resource/SharedResource - Display an image
Hi, greeklinux wrote: your solution works. But the problem is that I am already registering the resource in an Initializer. But ok... When you bind a resource reference to an application, it's not about registering the resource itself but looking it up. My fault. greeklinux wrote: Now I am uploading the picture and after the reload, I see the standard pic. After a site refresh I am seeing the uploaded pic. Do I have to set any headers? Though I don't know your setup, but you need to refresh your image component (i.e. if it is done via an Ajax request). No headers needs to be set here. ... roland -- View this message in context: http://www.nabble.com/Resource-SharedResource---Display-an-image-tp18348115p18393207.html Sent from the Wicket - User mailing list archive at Nabble.com. - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: Resource/SharedResource - Display an image
greeklinux wrote: But now I get a NullPointerException: at .PhotoUploadPage$1.getResourceStream(PhotoUploadPage.java:66) at org.apache.wicket.Resource.init(Resource.java:199) at org.apache.wicket.Resource.onResourceRequested(Resource.java:105) at org.apache.wicket.markup.html.image.resource.LocalizedImageResource.onResourceRequested(LocalizedImageResource.java:198) at org.apache.wicket.markup.html.image.Image.onResourceRequested(Image.java:147) Where in the code snippet that you posted is line 66 at which this NPE has occured ? ...roland -- View this message in context: http://www.nabble.com/Resource-SharedResource---Display-an-image-tp18348115p18359444.html Sent from the Wicket - User mailing list archive at Nabble.com. - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: Resource/SharedResource - Display an image
Hello Roland, the line where the NullPointerException is thrown is: resourceStream = new ResourceReference(MyApplication.PROFILE_STANDARD) .getResource().getResourceStream(); If I am using only this ResourceReference then it works. But I dont know why the Exception is thrown. greetings Roland Huss wrote: greeklinux wrote: But now I get a NullPointerException: at .PhotoUploadPage$1.getResourceStream(PhotoUploadPage.java:66) at org.apache.wicket.Resource.init(Resource.java:199) at org.apache.wicket.Resource.onResourceRequested(Resource.java:105) at org.apache.wicket.markup.html.image.resource.LocalizedImageResource.onResourceRequested(LocalizedImageResource.java:198) at org.apache.wicket.markup.html.image.Image.onResourceRequested(Image.java:147) Where in the code snippet that you posted is line 66 at which this NPE has occured ? ...roland -- View this message in context: http://www.nabble.com/Resource-SharedResource---Display-an-image-tp18348115p18363284.html Sent from the Wicket - User mailing list archive at Nabble.com. - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: Resource/SharedResource - Display an image
greeklinux wrote: the line where the NullPointerException is thrown is: resourceStream = new ResourceReference(MyApplication.PROFILE_STANDARD) .getResource().getResourceStream(); If I am using only this ResourceReference then it works. But I dont know why the Exception is thrown. You need to bind (==register) the ResourceReference to the application before you can get to the referenced Resource (which has been registered either explicitely or implicitely, if is a PackageResource): resourceReference = new ResourceReference(MyApplication.PROFILE_STANDARD); resourceReference.bind(Application.get()); resourceStream = resourceReferece.getResource().getResourceStream(); ...roland -- View this message in context: http://www.nabble.com/Resource-SharedResource---Display-an-image-tp18348115p18363876.html Sent from the Wicket - User mailing list archive at Nabble.com. - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: Resource/SharedResource - Display an image
Hello Roland, your solution works. But the problem is that I am already registering the resource in an Initializer. But ok... Now I am uploading the picture and after the reload, I see the standard pic. After a site refresh I am seeing the uploaded pic. Do I have to set any headers? greetings Roland Huss wrote: greeklinux wrote: the line where the NullPointerException is thrown is: resourceStream = new ResourceReference(MyApplication.PROFILE_STANDARD) .getResource().getResourceStream(); If I am using only this ResourceReference then it works. But I dont know why the Exception is thrown. You need to bind (==register) the ResourceReference to the application before you can get to the referenced Resource (which has been registered either explicitely or implicitely, if is a PackageResource): resourceReference = new ResourceReference(MyApplication.PROFILE_STANDARD); resourceReference.bind(Application.get()); resourceStream = resourceReferece.getResource().getResourceStream(); ...roland -- View this message in context: http://www.nabble.com/Resource-SharedResource---Display-an-image-tp18348115p18365532.html Sent from the Wicket - User mailing list archive at Nabble.com. - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Resource/SharedResource - Display an image
Hello,
I am building a simple Page. The Page has a form and allows an user
to upload a profile picture.
If the user does not have a profile picture, then I want to display a
standard
picture. This should be a shared resource, so the browser can cache it.
Now if the user uploads a picture, the new picture should be shown instead.
I tried and played with shared resources and WebResource but I cant
get it working.
This is my code:
Image image = null;
final byte[] pic = MyApplication.get().getUserPicFromDB(userid);
if (pic == null) {
image = new Image(photo, new
ResourceReference(MyApplication.PROFILE_STANDARD));
} else {
WebResource resource = new WebResource() {
public IResourceStream getResourceStream() {
IResourceStream resourceStream = new
AbstractResourceStream() {
private InputStream is;
public InputStream getInputStream() throws
ResourceStreamNotFoundException {
is = new BufferedInputStream(new
ByteArrayInputStream(pic));
return is;
}
public void close() throws IOException {
is.close();
}
};
return resourceStream;
}
};
image = new Image(photo, resource);
}
add(image)
If an user has no picture and he uploads one, then I still see the share
resource.
Ok, because the Page was constructed with the shared resource.
Then I tried to test if a user picture is present in the getResourceStream()
Method of WebResource:
WebResource resource = new WebResource() {
public IResourceStream getResourceStream() {
IResourceStream resourceStream;
final byte[] pic =
MyApplication.get().getUserPicFromDB(userid);
if (pic != null) {
resourceStream = new AbstractResourceStream() {
private InputStream is;
public InputStream getInputStream() throws
ResourceStreamNotFoundException {
is = new BufferedInputStream(new
ByteArrayInputStream(pic));
return is;
}
public void close() throws IOException {
is.close();
}
};
} else {
resourceStream = new
ResourceReference(MyApplication.PROFILE_STANDARD)
.getResource().getResourceStream();
}
return resourceStream;
}
};
add(new Image(photo, resource));
But now I get a NullPointerException:
at .PhotoUploadPage$1.getResourceStream(PhotoUploadPage.java:66)
at org.apache.wicket.Resource.init(Resource.java:199)
at org.apache.wicket.Resource.onResourceRequested(Resource.java:105)
at
org.apache.wicket.markup.html.image.resource.LocalizedImageResource.onResourceRequested(LocalizedImageResource.java:198)
at
org.apache.wicket.markup.html.image.Image.onResourceRequested(Image.java:147)
I would be thankful for suggestions.
Thanks
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