Re: [xwiki-users] Fwd: Getting the domain name of a virtual wiki through velocity

20 Sep 2008

On Fri, Sep 19, 2008 at 7:54 PM, mh &lt;mhendred(a)gmail.com&gt; wrote:
...
  Hi, Thanks for the response. But there are still a
couple issues. Here
 is a review of my setup again. I have a xwiki manager with a couple
 wikis on it. ill call the xem controller wiki "controllerwiki", and
 the virtual wikis "wikiA" and "wikiB" This is the code im using:

 -------------------------------
 #set ($WikiManager = $xwiki.wikimanager)
 #set($wikiDesc = $WikiManager.getWikiFromName("wikiA"))
 #set($wikiAlias = $wikiDesc.firstWikiAlias)
 $wikiAlias
 ------------------------------

 When I put this code in a page called "Test" on the controller wiki, i
 get the following:

 XWiki.XWikiServerWikiA,wikiA.domain.net,XWiki.Admin

 but when i put this code in a page called "Test" in wikiA I get a
 stack trace. here it is:

 Error number 4001 in 4: Error while parsing velocity page Main.Test
 Wrapped Exception: Failed to evaluate content with id Test
 com.xpn.xwiki.XWikiException: Error number 4001 in 4: Error while
 parsing velocity page Main.Test
 Wrapped Exception: Failed to evaluate content with id Test
        at
com.xpn.xwiki.render.XWikiVelocityRenderer.evaluate(XWikiVelocityRenderer.java:112)
        at
com.xpn.xwiki.render.XWikiVelocityRenderer.render(XWikiVelocityRenderer.java:87)
        at
com.xpn.xwiki.render.DefaultXWikiRenderingEngine.renderText(DefaultXWikiRenderingEngine.java:272)
        at
com.xpn.xwiki.render.DefaultXWikiRenderingEngine.renderText(DefaultXWikiRenderingEngine.java:202)
        at
com.xpn.xwiki.render.DefaultXWikiRenderingEngine.renderText(DefaultXWikiRenderingEngine.java:170)
        at
com.xpn.xwiki.render.DefaultXWikiRenderingEngine.renderDocument(DefaultXWikiRenderingEngine.java:159)
        at com.xpn.xwiki.doc.XWikiDocument.getRenderedContent(XWikiDocument.java:430)
        at com.xpn.xwiki.api.Document.getRenderedContent(Document.java:371)
        at sun.reflect.GeneratedMethodAccessor263.invoke(Unknown Source)
        at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
        at java.lang.reflect.Method.invoke(Method.java:585)
        at
org.apache.velocity.util.introspection.UberspectImpl$VelMethodImpl.invoke(UberspectImpl.java:295)
        at org.apache.velocity.runtime.parser.node.ASTMethod.execute(ASTMethod.java:245)
        at
org.apache.velocity.runtime.parser.node.ASTReference.execute(ASTReference.java:203)
        at
org.apache.velocity.runtime.parser.node.ASTReference.render(ASTReference.java:294)
        at org.apache.velocity.runtime.parser.node.SimpleNode.render(SimpleNode.java:318)
        at
org.xwiki.velocity.DefaultVelocityEngine.evaluate(DefaultVelocityEngine.java:178)
        at
org.xwiki.velocity.DefaultVelocityEngine.evaluate(DefaultVelocityEngine.java:143)
        at
com.xpn.xwiki.render.XWikiVelocityRenderer.evaluate(XWikiVelocityRenderer.java:107)
        at com.xpn.xwiki.XWiki.parseTemplate(XWiki.java:1596)
        at com.xpn.xwiki.api.XWiki.parseTemplate(XWiki.java:608)
        at sun.reflect.GeneratedMethodAccessor150.invoke(Unknown Source)
        at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
        at java.lang.reflect.Method.invoke(Method.java:585)
        at
org.apache.velocity.util.introspection.UberspectImpl$VelMethodImpl.invoke(UberspectImpl.java:295)
        at org.apache.velocity.runtime.parser.node.ASTMethod.execute(ASTMethod.java:245)
        at
org.apache.velocity.runtime.parser.node.ASTReference.execute(ASTReference.java:203)
        at
org.apache.velocity.runtime.parser.node.ASTReference.render(ASTReference.java:294)
        at org.apache.velocity.runtime.parser.node.SimpleNode.render(SimpleNode.java:318)
        at
org.apache.velocity.runtime.directive.VelocimacroProxy.render(VelocimacroProxy.java:194)
        at
org.apache.velocity.runtime.parser.node.ASTDirective.render(ASTDirective.java:170)
        at org.apache.velocity.runtime.parser.node.ASTBlock.render(ASTBlock.java:74)
        at
org.apache.velocity.runtime.parser.node.ASTIfStatement.render(ASTIfStatement.java:88)
        at org.apache.velocity.runtime.parser.node.ASTBlock.render(ASTBlock.java:74)
        at org.apache.velocity.runtime.parser.node.SimpleNode.render(SimpleNode.java:318)
        at
org.apache.velocity.runtime.parser.node.ASTIfStatement.render(ASTIfStatement.java:107)
        at org.apache.velocity.runtime.parser.node.SimpleNode.render(SimpleNode.java:318)
        at
org.xwiki.velocity.DefaultVelocityEngine.evaluate(DefaultVelocityEngine.java:178)
        at
org.xwiki.velocity.DefaultVelocityEngine.evaluate(DefaultVelocityEngine.java:143)
        at
com.xpn.xwiki.render.XWikiVelocityRenderer.evaluate(XWikiVelocityRenderer.java:107)
        at com.xpn.xwiki.XWiki.parseTemplate(XWiki.java:1596)
        at com.xpn.xwiki.web.Utils.parseTemplate(Utils.java:125)
        at com.xpn.xwiki.web.XWikiAction.execute(XWikiAction.java:226)
        at com.xpn.xwiki.web.XWikiAction.execute(XWikiAction.java:115)
        at
org.apache.struts.action.RequestProcessor.processActionPerform(RequestProcessor.java:431)
        at org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:236)
        at org.apache.struts.action.ActionServlet.process(ActionServlet.java:1196)
        at org.apache.struts.action.ActionServlet.doGet(ActionServlet.java:414)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:617)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
        at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
        at
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
        at
com.xpn.xwiki.web.SavedRequestRestorerFilter.doFilter(SavedRequestRestorerFilter.java:287)
        at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
        at
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
        at
com.xpn.xwiki.web.SetCharacterEncodingFilter.doFilter(SetCharacterEncodingFilter.java:112)
        at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
        at
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
        at
org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233)
        at
org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
        at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:128)
        at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
        at
org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
        at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:286)
        at org.apache.jk.server.JkCoyoteHandler.invoke(JkCoyoteHandler.java:190)
        at org.apache.jk.common.HandlerRequest.invoke(HandlerRequest.java:283)
        at org.apache.jk.common.ChannelSocket.invoke(ChannelSocket.java:767)
        at org.apache.jk.common.ChannelSocket.processConnection(ChannelSocket.java:697)
        at
org.apache.jk.common.ChannelSocket$SocketConnection.runIt(ChannelSocket.java:889)
        at
org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:690)
        at java.lang.Thread.run(Thread.java:595)

 Wrapped Exception:

 org.apache.velocity.exception.MethodInvocationException: Invocation of
 method 'getFirstWikiAlias' in class
 com.xpn.xwiki.plugin.wikimanager.doc.Wiki threw exception
 java.lang.NullPointerException @ Main.Test3,29? at
 org.apache.velocity.runtime.parser.node.ASTIdentifier.execute(ASTIdentifier.java:205)
 at org.apache.velocity.runtime.parser.node.ASTReference.execute(ASTReference.java:203)
 at org.apache.velocity.runtime.parser.node.ASTReference.value(ASTReference.java:419)
 at org.apache.velocity.runtime.parser.node.ASTExpression.value(ASTExpression.java:73)
 at
org.apache.velocity.runtime.parser.node.ASTSetDirective.render(ASTSetDirective.java:125)
 at org.apache.velocity.runtime.parser.node.SimpleNode.render(SimpleNode.java:318)
 at org.xwiki.velocity.DefaultVelocityEngine.evaluate(DefaultVelocityEngine.java:178)
 at org.xwiki.velocity.DefaultVelocityEngine.evaluate(DefaultVelocityEngine.java:143)
 at com.xpn.xwiki.render.XWikiVelocityRenderer.evaluate(XWikiVelocityRenderer.java:107)
 at com.xpn.xwiki.render.XWikiVelocityRenderer.render(XWikiVelocityRenderer.java:87)
 at
com.xpn.xwiki.render.DefaultXWikiRenderingEngine.renderText(DefaultXWikiRenderingEngine.java:272)
 at
com.xpn.xwiki.render.DefaultXWikiRenderingEngine.renderText(DefaultXWikiRenderingEngine.java:202)
 at
com.xpn.xwiki.render.DefaultXWikiRenderingEngine.renderText(DefaultXWikiRenderingEngine.java:170)
 at
com.xpn.xwiki.render.DefaultXWikiRenderingEngine.renderDocument(DefaultXWikiRenderingEngine.java:159)
 at com.xpn.xwiki.doc.XWikiDocument.getRenderedContent(XWikiDocument.java:430)
 at com.xpn.xwiki.api.Document.getRenderedContent(Document.java:371) at
 sun.reflect.GeneratedMethodAccessor263.invoke(Unknown Source) at
 sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
 at java.lang.reflect.Method.invoke(Method.java:585) at

org.apache.velocity.util.introspection.UberspectImpl$VelMethodImpl.invoke(UberspectImpl.java:295)
 at org.apache.velocity.runtime.parser.node.ASTMethod.execute(ASTMethod.java:245)
 at org.apache.velocity.runtime.parser.node.ASTReference.execute(ASTReference.java:203)
 at org.apache.velocity.runtime.parser.node.ASTReference.render(ASTReference.java:294)
 at org.apache.velocity.runtime.parser.node.SimpleNode.render(SimpleNode.java:318)
 at org.xwiki.velocity.DefaultVelocityEngine.evaluate(DefaultVelocityEngine.java:178)
 at org.xwiki.velocity.DefaultVelocityEngine.evaluate(DefaultVelocityEngine.java:143)
 at com.xpn.xwiki.render.XWikiVelocityRenderer.evaluate(XWikiVelocityRenderer.java:107)
 at com.xpn.xwiki.XWiki.parseTemplate(XWiki.java:1596) at
 com.xpn.xwiki.api.XWiki.parseTemplate(XWiki.java:608) at
 sun.reflect.GeneratedMethodAccessor150.invoke(Unknown Source) at
 sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
 at java.lang.reflect.Method.invoke(Method.java:585) at

org.apache.velocity.util.introspection.UberspectImpl$VelMethodImpl.invoke(UberspectImpl.java:295)
 at org.apache.velocity.runtime.parser.node.ASTMethod.execute(ASTMethod.java:245)
 at org.apache.velocity.runtime.parser.node.ASTReference.execute(ASTReference.java:203)
 at org.apache.velocity.runtime.parser.node.ASTReference.render(ASTReference.java:294)
 at org.apache.velocity.runtime.parser.node.SimpleNode.render(SimpleNode.java:318)
 at
org.apache.velocity.runtime.directive.VelocimacroProxy.render(VelocimacroProxy.java:194)
 at org.apache.velocity.runtime.parser.node.ASTDirective.render(ASTDirective.java:170)
 at org.apache.velocity.runtime.parser.node.ASTBlock.render(ASTBlock.java:74)
 at org.apache.velocity.runtime.parser.node.ASTIfStatement.render(ASTIfStatement.java:88)
 at org.apache.velocity.runtime.parser.node.ASTBlock.render(ASTBlock.java:74)
 at org.apache.velocity.runtime.parser.node.SimpleNode.render(SimpleNode.java:318)
 at
org.apache.velocity.runtime.parser.node.ASTIfStatement.render(ASTIfStatement.java:107)
 at org.apache.velocity.runtime.parser.node.SimpleNode.render(SimpleNode.java:318)
 at org.xwiki.velocity.DefaultVelocityEngine.evaluate(DefaultVelocityEngine.java:178)
 at org.xwiki.velocity.DefaultVelocityEngine.evaluate(DefaultVelocityEngine.java:143)
 at com.xpn.xwiki.render.XWikiVelocityRenderer.evaluate(XWikiVelocityRenderer.java:107)
 at com.xpn.xwiki.XWiki.parseTemplate(XWiki.java:1596) at
 com.xpn.xwiki.web.Utils.parseTemplate(Utils.java:125) at
 com.xpn.xwiki.web.XWikiAction.execute(XWikiAction.java:226) at
 com.xpn.xwiki.web.XWikiAction.execute(XWikiAction.java:115) at

org.apache.struts.action.RequestProcessor.processActionPerform(RequestProcessor.java:431)
 at org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:236)
 at org.apache.struts.action.ActionServlet.process(ActionServlet.java:1196)
 at org.apache.struts.action.ActionServlet.doGet(ActionServlet.java:414)
 at javax.servlet.http.HttpServlet.service(HttpServlet.java:617) at
 javax.servlet.http.HttpServlet.service(HttpServlet.java:717) at

org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
 at
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
 at
com.xpn.xwiki.web.SavedRequestRestorerFilter.doFilter(SavedRequestRestorerFilter.java:287)
 at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
 at
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
 at
com.xpn.xwiki.web.SetCharacterEncodingFilter.doFilter(SetCharacterEncodingFilter.java:112)
 at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
 at
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
 at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233)
 at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
 at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:128)
 at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
 at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
 at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:286)
 at org.apache.jk.server.JkCoyoteHandler.invoke(JkCoyoteHandler.java:190)
 at org.apache.jk.common.HandlerRequest.invoke(HandlerRequest.java:283)
 at org.apache.jk.common.ChannelSocket.invoke(ChannelSocket.java:767)
 at org.apache.jk.common.ChannelSocket.processConnection(ChannelSocket.java:697)
 at org.apache.jk.common.ChannelSocket$SocketConnection.runIt(ChannelSocket.java:889)
 at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:690)
 at java.lang.Thread.run(Thread.java:595) Caused by:
 java.lang.NullPointerException at
 com.xpn.xwiki.plugin.wikimanager.doc.Wiki.getFirstWikiAlias(Wiki.java:163)
 at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at
 sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
 at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
 at java.lang.reflect.Method.invoke(Method.java:585) at

org.apache.velocity.runtime.parser.node.PropertyExecutor.execute(PropertyExecutor.java:137)
 at
org.apache.velocity.util.introspection.UberspectImpl$VelGetterImpl.invoke(UberspectImpl.java:350)
 at org.apache.velocity.runtime.parser.node.ASTIdentifier.execute(ASTIdentifier.java:180)
 … 78 more 
I think this is a bug in wikimanager.getWikiFromName("wikiA"), it
seems it looks in current wiki in place of forcing search in main wiki
for the wiki descriptor (I just added a jira issue
http://jira.xwiki.org/jira/browse/XAWM-88).

1 - A workaround is to get the descriptor "by hand": all wikis
descriptor are in the main wiki with the name
xwiki:XWiki.XWikiServer<Wikiname> with an upper case for the first
character of the wiki name. The velocity code to get the current wiki
descriptor is something like:

#set($wikidescriptor =
$xwiki.getDocument("xwiki:XWiki.XWikiServer${context.database.substring(0,
1).toUpperCase()}${context.database.substring(1).toLowerCase()}"))

and then $wikidescriptor.server give the domain of the first alias (To
get other alias you have to list document's objects of type
"XWiki.XWikiServerClass")

2 - Another solution if your have progrmming rights is simply to
switch to main wiki using $context.setDatabase() before executing
wikimanager plugin code and restore current wiki when it's done:

#set($currentDatabase = $context.database)
$context.setDatabase($context.mainWikiName)
[...]
$context.setDatabase($currentDatabase)

...

 i really need to be able to get the domain name of the wiki im on with
 out knowing its name too, so something that takes the name of the wiki
 as an arg probably wont work for me. And suggestions? Thanks. 
The current wiki is in $context.database

...

 On Fri, Sep 19, 2008 at 1:39 AM, Vincent Massol &lt;vincent(a)massol.net&gt; wrote:
  A good faq entry or even better a good code
snippet example for a
 tutorial on XEM development.

 -Vincent

 On Sep 19, 2008, at 10:26 AM, Thomas Mortagne wrote:

  Hi,

 On Thu, Sep 18, 2008 at 12:55 AM, mh &lt;mhendred(a)gmail.com&gt; wrote:
  ---------- Forwarded message ----------
 From: mh &lt;mhendred(a)gmail.com&gt;
 Date: Wed, Sep 17, 2008 at 11:44 AM
 Subject: Getting the domain name of a virtual wiki through velocity
 To: XWiki Developers &lt;devs(a)xwiki.org&gt;

 Hi,

 I have an XEM set up with with several virtual wikis on it. I'm
 trying
 to get the name of the virtual xwiki though velocity. For example,
 say
 that I have a XEM instance running two virtual wikis:

 1) wikiA.domain.org
 2) wikiB.domain.org

 on a XEM called xem.domain.org

 Im looking for the velocity code that will return the name (domain
 name) when embedded in a page of one of the virtual wikis. Something
 like: $xwiki.getServerName()

 if i put that in a page in wikiA, it should return
 "wikiA.domain.org".
 Likewise, if i put the same code in wikiB, it should return
 "wikiB.domain.org"

 I looked at  the velocity code for
 xem.doman.org/xwiki/bin/view/WikiManager/ because it lists the actual
 domain names under the "Domain Names" column. But it just gets a list
 of any virtual wikis available and lists them out. This page uses the
 xwikimanager plugin. I looked at the api and didn't see a way to
 directly get the domain name of the wiki in question. Could someone
 please point me in the right direction? Thanks in advanced and have a
 great day! 
 The domain name of a wiki is part of it's descriptor (like the owner
 of the wiki etc.) and you can get the descriptor using
 $wikimanager.getWikiFromName("wikiName"). Then this Wiki object
 contains the list of aliasses of this wiki you can get using
 getWikiAliasList() if you want them all or getFirstWikiAlias() if you
 just want the one generally used when generating URLs like
 [wikiname:Sapce.Page]. Here you can find all you see when you look at
 XWiki/XWikiServerWikiname : owner, server, description... and some
 helper like serverUrl, homePageUrl etc.

 So to sumurize your use case in velocity (given that your wiki name is
 "wikiname"):

>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
 #set($wikiDesc = $wikimanager.getWikiFromName("wikiname"))
 #set($wikiAlias = $wikiDesc.firstWikiAlias)

 the server url of wiki "wikiname" is $wikiAlias.serverUrl and it's
 home page is at $wikiAlias.homePageUrl
 <
 <
 <
 <
 <
 <
 <
 <
 <
 <
 <

<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<

> -mh  _______________________________________________
 users mailing list
 users(a)xwiki.org
 http://lists.xwiki.org/mailman/listinfo/users
  _______________________________________________
 users mailing list
 users(a)xwiki.org
 http://lists.xwiki.org/mailman/listinfo/users

-- 
Thomas Mortagne

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Re: [xwiki-users] Fwd: Getting the domain name of a virtual wiki through velocity