| A DynamicAttachment is an attachment which does not really exist, but is
created dynamically by a JSPWiki component.
Note that a DynamicAttachment might not be available before it is actually
created by a component (e.g. plugin), and therefore trying to access it
before that component has been invoked, might result in a surprising 404.
DynamicAttachments are not listed among regular attachments in the current
version.
Usage:
class MyDynamicComponent implements DynamicAttachmentProvider
{
...
DynamicAttachment destatt = mgr.getDynamicAttachment( destattname );
if( destatt == null )
{
destatt = new DynamicAttachment( context.getEngine(),
context.getPage().getName(),
destfilename,
this );
destatt.setCacheable( false );
}
// This is used to check whether the attachment is modified or not
// so don't forget to update this if your attachment source changes!
// Else JSPWiki will be serving 304s to anyone who asks...
destatt.setLastModified( context.getPage().getLastModified() );
mgr.storeDynamicAttachment( context, destatt );
...
public InputStream getAttachmentData( WikiContext context, Attachment att )
throws IOException
{
byte[] bytes = "This is a test".getBytes();
return new ByteArrayInputStream( bytes );
}
author:
Janne Jalkanen
since:
2.5.34 |
