1 Dec
2009
1 Dec
'09
7:12 p.m.
Hi xwiki-users,
I'm trying to bootstrap a component from the wiki itself (via Groovy). I
have an interface defined as follows:
// This is the text inside the User.UserDAO document
{{groovy}}
interface UserDAO
{
def ROLE = UserDAO.class.name
/**
* Returns the current user name.
*/
def getUserName()
/**
* Returns the current user's password
*/
def getPassword()
}
{{/groovy}}
I also have a dummy implementation defined as follows:
// This is the text inside the User.UserXWQLDAO document
{{include document="User.UserDAO" /}}
{{groovy}}
import org.xwiki.component.annotation.Component
import org.xwiki.component.annotation.Requirement
import org.xwiki.component.descriptor.DefaultComponentDescriptor
import org.xwiki.query.Query
import org.xwiki.query.QueryManager
import com.xpn.xwiki.web.Utils
@Component(roles = [ UserDAO.class ])
class UserXWQLDAO implements UserDAO
{
@Requirement
def QueryManager queryManager
/**
* Returns the current user name.
*/
def getUserName() {
return "bleh"
}
/**
* Returns the current user's password
*/
def getPassword() {
return "bleh"
}
}
if(!Utils.componentManager.hasComponent(UserDAO.class))
{
def componentDescriptor = new DefaultComponentDescriptor()
componentDescriptor.setImplementation(UserDAO.class)
Utils.componentManager.registerComponent(componentDescriptor, new
UserXWQLDAO())
}
{{/groovy}}
The first problem I ran into was that Groovy 1.6.5 ran into
IncompatibleClassChangeErrors (http://jira.codehaus.org/browse/GROOVY-3830).
Upgrading to 1.6.6 fixed this issue. But, then I ran into a NPE:
*exception*
javax.servlet.ServletException: Failed to initialize Request/Response or Session
com.xpn.xwiki.web.XWikiAction.initializeContainerComponent(XWikiAction.java:391)
com.xpn.xwiki.web.XWikiAction.initializeXWikiContext(XWikiAction.java:372)
com.xpn.xwiki.web.XWikiAction.execute(XWikiAction.java:112)
org.apache.struts.action.RequestProcessor.processActionPerform(RequestProcessor.java:431)
org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:236)
org.apache.struts.action.ActionServlet.process(ActionServlet.java:1196)
org.apache.struts.action.ActionServlet.doPost(ActionServlet.java:432)
javax.servlet.http.HttpServlet.service(Unknown Source)
javax.servlet.http.HttpServlet.service(Unknown Source)
com.xpn.xwiki.wysiwyg.server.filter.ConversionFilter.doFilter(ConversionFilter.java:152)
com.xpn.xwiki.web.ActionFilter.doFilter(ActionFilter.java:119)
com.xpn.xwiki.plugin.webdav.XWikiDavFilter.doFilter(XWikiDavFilter.java:68)
com.xpn.xwiki.web.SavedRequestRestorerFilter.doFilter(SavedRequestRestorerFilter.java:295)
com.xpn.xwiki.web.SetCharacterEncodingFilter.doFilter(SetCharacterEncodingFilter.java:112)
*root cause*
org.xwiki.container.servlet.ServletContainerException: Failed to
initialize request
org.xwiki.container.servlet.internal.DefaultServletContainerInitializer.initializeRequest(DefaultServletContainerInitializer.java:98)
com.xpn.xwiki.web.XWikiAction.initializeContainerComponent(XWikiAction.java:387)
com.xpn.xwiki.web.XWikiAction.initializeXWikiContext(XWikiAction.java:372)
com.xpn.xwiki.web.XWikiAction.execute(XWikiAction.java:112)
org.apache.struts.action.RequestProcessor.processActionPerform(RequestProcessor.java:431)
org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:236)
org.apache.struts.action.ActionServlet.process(ActionServlet.java:1196)
org.apache.struts.action.ActionServlet.doPost(ActionServlet.java:432)
javax.servlet.http.HttpServlet.service(Unknown Source)
javax.servlet.http.HttpServlet.service(Unknown Source)
com.xpn.xwiki.wysiwyg.server.filter.ConversionFilter.doFilter(ConversionFilter.java:152)
com.xpn.xwiki.web.ActionFilter.doFilter(ActionFilter.java:119)
com.xpn.xwiki.plugin.webdav.XWikiDavFilter.doFilter(XWikiDavFilter.java:68)
com.xpn.xwiki.web.SavedRequestRestorerFilter.doFilter(SavedRequestRestorerFilter.java:295)
com.xpn.xwiki.web.SetCharacterEncodingFilter.doFilter(SetCharacterEncodingFilter.java:112)
*root cause*
java.lang.NullPointerException
Haven't investigated any further than this, but has anyone successfully
created components completely within a wiki document? That would just be so
cool! Great work!
-- Lewis