topic Re: tagging by local java api caused NullpointerException in Nuxeo Forum

tagging by local java api caused NullpointerException

maumig_ — Fri, 06 Sep 2013 12:43:05 GMT

Hi all, when I try to tag a document by following code, I obtain a nullpointerexception. Some suggest about how to use local java api? Thanks.

I have a jsp with this code: **<%

	LocalSessionFactory lsf = new LocalSessionFactory();
	CoreSession session = lsf.getSession();
	
	TagService tsi = Framework.getService(TagService.class);
	tsi.tag(session, "2b1eefa4-81ee-4d0f-8bcb-24f5e9745f96", "trytag","Administrator");

%>**

Exception stacktrace logs:

143: CoreSession csession = lsf.getSession(); 144: 145: TagService tsi = Framework.getService(TagService.class); 146: tsi.tag(csession, "2b1eefa4-81ee-4d0f-8bcb-24f5e9745f96", "cacca","Administrator"); 147: 148: 149: Stacktrace: at org.apache.jasper.servlet.JspServletWrapper.handleJspException(JspServletWrapper.java:521) at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:430) at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:313) at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:260) 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 org.nuxeo.wss.servlet.BaseWSSFilter.doFilter(BaseWSSFilter.java:137) at org.nuxeo.wss.servlet.FailSafeWSSFilter.doFilter(FailSafeWSSFilter.java:55) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) at org.nuxeo.ecm.platform.ui.web.rest.FancyURLFilter.doFilter(FancyURLFilter.java:129) ... 24 more Caused by: java.lang.NullPointerException at org.nuxeo.ecm.core.api.local.LocalSession.getPrincipal(LocalSession.java:164) at org.nuxeo.ecm.core.api.UnrestrictedSessionRunner.isUnrestricted(UnrestrictedSessionRunner.java:103) at org.nuxeo.ecm.core.api.UnrestrictedSessionRunner.(UnrestrictedSessionRunner.java:56) at org.nuxeo.ecm.platform.tag.TagServiceImpl$UnrestrictedAddTagging.(TagServiceImpl.java:131) at org.nuxeo.ecm.platform.tag.TagServiceImpl.tag(TagServiceImpl.java:115) at org.apache.jsp.prova_jsp._jspService(prova_jsp.java:220) at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70) at javax.servlet.http.HttpServlet.service(HttpServlet.java:717) at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:388) ... 34 more

Re: tagging by local java api caused NullpointerException

Florent_Guillau — Fri, 06 Sep 2013 13:42:36 GMT

This is not how you extend Nuxeo. LocalSessionFactory is an internal class not designed to be used by user code.

Please start with http://doc.nuxeo.com/display/NXDOC/Dev+Cookbook and http://doc.nuxeo.com/display/NXDOC/Customization+and+Development

Re: tagging by local java api caused NullpointerException

maumig_ — Fri, 06 Sep 2013 14:50:28 GMT

Ok. But, probably I was not clear.

As stated in the documentation,

The services can be local (inside the same JVM) and most of them can be Also called remotely via RMI if your target Application Server supports EJB3 remoting.

I would like to call upon the services of Nuxeo from "local", ie with a java client within the same JVM of Nuxeo. This need arises from having to perform operations that are not supported by remote clients documented. For example, do the tagging of a document.

The question becomes: How do I invoke a service (for example that of tagging) in "local" mode?

I tried to write the previous code but probably I'm missing some basic concept.

Thank you again.

Re: tagging by local java api caused NullpointerException

Florent_Guillau — Fri, 06 Sep 2013 15:35:08 GMT

You wrote this in the answers section but this is not an answer. Please update your original question instead, or add a comment to it.