Re: [xwiki-users] Components from the wiki

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!