Hi Marius,
In my last reply, I mentioned have tried the your suggestion. In the code block, I pasted the abridged version
The exactly code block is as following.
{{velocity}}
## TODO: Rewrite this page completely so that it uses the same source as the Activity Stream Macro
## Backward compatibility redirect, if the ATOM feed is called without the outputSyntax query argument, force it.
#if (("$!request.xpage" == 'plain' || "$!request.xpage" == 'rdf') && "$!request.outputSyntax" != 'plain')
$response.sendRedirect($xwiki.getURL($doc.fullName, 'view', 'xpage=plain&outputSyntax=plain'))
#end
#if ("$!request.xpage" == 'plain' && "$!request.outputSyntax" == 'plain')
$response.setContentType('application/atom+xml')
## ======================
## Compute Query to find documents
## ======================
#if("$!{request.tag}" != '')
## RSS feed for documents tagged with $request.tag
#set ($query = 'from doc.object(XWiki.TagClass) as tag where (')
#foreach ($tag in $request.getParameterValues('tag'))
#set ($query = "$query :tag${foreach.count} member of tag.tags")
#if ($foreach.hasNext)
#set ($query = "$query OR ")
#end
#end
#set ($query = "$query) AND ")
#else
#set ($query = 'where')
#end
#if("$!{request.space}" == '')
## RSS feed for the whole wiki
#set ($query = "$query 1=1")
#else
## RSS feed for spaces
#set ($query = "$query (")
#foreach ($space in $request.getParameterValues('space'))
#set ($query = "$query doc.space=:space${foreach.count} OR doc.space LIKE :space_nested${foreach.count}")
#if ($foreach.hasNext)
#set ($query = "$query OR ")
#end
#end
#set ($query = "$query)")
#end
#set ($query = "$query order by doc.date desc")
## ==============
## Bind Query parameters
## ==============
## Bind query parameters depending on the passed query string parameters
#set ($queryObject = $services.query.xwql($query).addFilter('hidden/document').addFilter('currentlanguage').setLimit(20).setOffset(0))
#if("$!{request.tag}" != '')
#foreach ($tag in $request.getParameterValues('tag'))
#set ($queryObject = $queryObject.bindValue("tag${foreach.count}", $tag))
#end
#end
#if("$!{request.space}" != '')
#foreach ($space in $request.getParameterValues('space'))
#set ($queryObject = $queryObject.bindValue("space${foreach.count}", $space))
#set ($queryObject = $queryObject.bindValue("space_nested${foreach.count}", "${space}.%"))
#end
#end
## ================
## Compute feed description
## ================
## 4 cases to handle: no spaces and tags specified, only spaces specified, only tags specified and spaces and tags specified
#if ("$!{request.space}" != '')
#if ("$!{request.tag}" != '')
#set ($description = $services.localization.render('activity.rss.feed.tagsAndSpaces.description', [$stringtool.join($request.getParameterValues('tag'), ','), $stringtool.join($request.getParameterValues('space'), ',')]))
#else
#set ($description = $services.localization.render('activity.rss.feed.spaces.description', [$stringtool.join($request.getParameterValues('space'), ',')]))
#end
#else
#if ("$!{request.tag}" != '')
#set ($description = $services.localization.render('activity.rss.feed.tags.description', [$stringtool.join($request.getParameterValues('tag'), ',')]))
#else
#set ($description = $services.localization.render('activity.rss.feed.description'))
#end
#end
## =====================
## Execute query and generate feed
## =====================
#set ($feed = $xwiki.feed.getWebFeed($queryObject.execute()))
#foreach ($entry in $feed.entries)
## Clear the list of contributors. Ideally we should convert the String to a SyndPerson object but we can't do this from Velocity.
#set ($discard = $entry.setContributors([]))
#end
#set ($feedURI = $xwiki.getDocument('Main.WebHome').getExternalURL('view'))
#set ($discard = $feed.setLink($feedURI))
#set ($discard = $feed.setUri($feedURI))
#set ($discard = $feed.setAuthor('XWiki'))
#set ($discard = $feed.setTitle($services.localization.render('activity.rss.feed.description')))
#set ($discard = $feed.setDescription($description))
#set ($discard = $feed.setLanguage("$xcontext.locale"))
#set ($discard = $feed.setCopyright($xwiki.getXWikiPreference('copyright')))
$xwiki.feed.getFeedOutput($feed, $xwiki.getXWikiPreference('feed_type', 'atom_1.0'))
#end
{{/velocity}}
The output is blank (0 byte), I wonder what is wrong with my code.
Update the complete code block according Marius suggested workaround solution.
