Hi Lewis, On Dec 1, 2009, at 7:12 PM, Lewis Denizen wrote:
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!
Yes, I've done that several times. Here's an example: http://svn.xwiki.org/svnroot/xwiki/platform/xwiki-applications/trunk/ircbot/... (search for registerComponent). Hope it helps, -Vincent