When I get to run this code:
public boolean saveUser(User user)
{
boolean ans=false;
try {
pm = PMF.get().getPersistenceManager();
pm.makePersistent(user);
}catch(NoClassDefFoundError n)
{
n.printStackTrace();
System.out.print("Ooops! No such class..");
}
catch(Exception e)
{
System.err.print(e.getMessage());
}
finally {
pm.close();
ans = true;
}
return ans;
}
The PMF class looks like this:
import javax.jdo.JDOHelper;
import javax.jdo.PersistenceManagerFactory;
public final class PMF {
private static final PersistenceManagerFactory pmfInstance =
JDOHelper.getPersistenceManagerFactory("transactions-
optional");
private PMF() {}
public static PersistenceManagerFactory get() {
return pmfInstance;
}
}
I get the following stack trace:
[java] java.lang.NullPointerException
[java] at
org.apache.jsp.register_jsp._jspService(register_jsp.java:84)
[java] at
org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:97)
[java] at
javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
[java] at
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:
377)
[java] at
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:
313)
[java] at
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:260)
[java] at
com.google.appengine.tools.development.PrivilegedJspServlet.access
$101(PrivilegedJspServlet.java:23)
[java] at
com.google.appengine.tools.development.PrivilegedJspServlet
$2.run(PrivilegedJspServlet.java:59)
[java] at
java.security.AccessController.doPrivileged(Native Method)
[java] at
com.google.appengine.tools.development.PrivilegedJspServlet.service(PrivilegedJspServlet.java:
57)
[java] at
javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
[java] at
org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:511)
[java] at org.mortbay.jetty.servlet.ServletHandler
$CachedChain.doFilter(ServletHandler.java:1166)
[java] at
com.google.appengine.api.blobstore.dev.ServeBlobFilter.doFilter(ServeBlobFilter.java:
58)
[java] at org.mortbay.jetty.servlet.ServletHandler
$CachedChain.doFilter(ServletHandler.java:1157)
[java] at
com.google.apphosting.utils.servlet.TransactionCleanupFilter.doFilter(TransactionCleanupFilter.java:
43)
[java] at org.mortbay.jetty.servlet.ServletHandler
$CachedChain.doFilter(ServletHandler.java:1157)
[java] at
com.google.appengine.tools.development.StaticFileFilter.doFilter(StaticFileFilter.java:
122)
[java] at org.mortbay.jetty.servlet.ServletHandler
$CachedChain.doFilter(ServletHandler.java:1157)
[java] at
org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:
388)
[java] at
org.mortbay.jetty.security.SecurityHandler.handle(SecurityHandler.java:
216)
[java] at
org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:
182)
[java] at
org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:
765)
[java] at
org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java:418)
[java] at
com.google.apphosting.utils.jetty.DevAppEngineWebAppContext.handle(DevAppEngineWebAppContext.java:
70)
[java] at
org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:
152)
[java] at
com.google.appengine.tools.development.JettyContainerService
$ApiProxyHandler.handle(JettyContainerService.java:351)
[java] at
org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:
152)
[java] at org.mortbay.jetty.Server.handle(Server.java:
326)
[java] at
org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:
542)
[java] at org.mortbay.jetty.HttpConnection
$RequestHandler.headerComplete(HttpConnection.java:923)
[java] at
org.mortbay.jetty.HttpParser.parseNext(HttpParser.java:547)
[java] at
org.mortbay.jetty.HttpParser.parseAvailable(HttpParser.java:212)
[java] at
org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:404)
[java] at
org.mortbay.io.nio.SelectChannelEndPoint.run(SelectChannelEndPoint.java:
409)
[java] at org.mortbay.thread.QueuedThreadPool
$PoolThread.run(QueuedThreadPool.java:582)
[java] May 17, 2011 4:14:32 PM
com.google.appengine.tools.development.LocalResourceFileServlet doGet
[java] WARNING: No file found for: /favicon.ico
[java] May 17, 2011 4:15:39 PM
com.google.apphosting.utils.jetty.JettyLogger warn
[java] WARNING: /register.jsp
[java] java.lang.NullPointerException
[java] at
org.apache.jsp.register_jsp._jspService(register_jsp.java:84)
[java] at
org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:97)
[java] at
javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
[java] at
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:
377)
[java] at
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:
313)
[java] at
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:260)
[java] at
com.google.appengine.tools.development.PrivilegedJspServlet.access
$101(PrivilegedJspServlet.java:23)
[java] at
com.google.appengine.tools.development.PrivilegedJspServlet
$2.run(PrivilegedJspServlet.java:59)
[java] at
java.security.AccessController.doPrivileged(Native Method)
[java] at
com.google.appengine.tools.development.PrivilegedJspServlet.service(PrivilegedJspServlet.java:
57)
[java] at
javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
[java] at
org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:511)
[java] at org.mortbay.jetty.servlet.ServletHandler
$CachedChain.doFilter(ServletHandler.java:1166)
[java] at
com.google.appengine.api.blobstore.dev.ServeBlobFilter.doFilter(ServeBlobFilter.java:
58)
[java] at org.mortbay.jetty.servlet.ServletHandler
$CachedChain.doFilter(ServletHandler.java:1157)
[java] at
com.google.apphosting.utils.servlet.TransactionCleanupFilter.doFilter(TransactionCleanupFilter.java:
43)
[java] at org.mortbay.jetty.servlet.ServletHandler
$CachedChain.doFilter(ServletHandler.java:1157)
[java] at
com.google.appengine.tools.development.StaticFileFilter.doFilter(StaticFileFilter.java:
122)
[java] at org.mortbay.jetty.servlet.ServletHandler
$CachedChain.doFilter(ServletHandler.java:1157)
[java] at
org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:
388)
[java] at
org.mortbay.jetty.security.SecurityHandler.handle(SecurityHandler.java:
216)
[java] at
org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:
182)
[java] at
org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:
765)
[java] at
org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java:418)
[java] at
com.google.apphosting.utils.jetty.DevAppEngineWebAppContext.handle(DevAppEngineWebAppContext.java:
70)
[java] at
org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:
152)
[java] at
com.google.appengine.tools.development.JettyContainerService
$ApiProxyHandler.handle(JettyContainerService.java:351)
[java] at
org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:
152)
[java] at org.mortbay.jetty.Server.handle(Server.java:
326)
[java] at
org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:
542)
[java] at org.mortbay.jetty.HttpConnection
$RequestHandler.headerComplete(HttpConnection.java:923)
[java] at
org.mortbay.jetty.HttpParser.parseNext(HttpParser.java:547)
[java] at
org.mortbay.jetty.HttpParser.parseAvailable(HttpParser.java:212)
[java] at
org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:404)
[java] at
org.mortbay.io.nio.SelectChannelEndPoint.run(SelectChannelEndPoint.java:
409)
[java] at org.mortbay.thread.QueuedThreadPool
$PoolThread.run(QueuedThreadPool.java:582)
[java] May 17, 2011 4:15:39 PM
com.google.appengine.tools.development.LocalResourceFileServlet doGet
[java] WARNING: No file found for: /favicon.ico
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