Hi Experts, I'm starting with google app engine. I was trying to make
some practice with entities and JPA, but I always obtain the same
error.
thanks a lot!
HTTP ERROR 500
Problem accessing /. Reason:
Unable to compile class for JSP:
An error occurred at line: 6 in the generated java file
Only a type can be imported. javax.persistence.EntityManager resolves
to a package
An error occurred at line: 23 in the jsp file: /index.jsp
EntityManager cannot be resolved to a type
20: <body>
21: <h1>Hello World!</h1>
22: <%
23: EntityManager em = EMF.get().createEntityManager();
24:
25: Usuario user1 = new Usuario();
26: user1.setNombre("ddf1");
An error occurred at line: 23 in the jsp file: /index.jsp
The type javax.persistence.EntityManagerFactory cannot be resolved. It
is indirectly referenced from required .class files
20: <body>
21: <h1>Hello World!</h1>
22: <%
23: EntityManager em = EMF.get().createEntityManager();
24:
25: Usuario user1 = new Usuario();
26: user1.setNombre("ddf1");
An error occurred at line: 23 in the jsp file: /index.jsp
The method createEntityManager() is undefined for the type
EntityManagerFactory
20: <body>
21: <h1>Hello World!</h1>
22: <%
23: EntityManager em = EMF.get().createEntityManager();
24:
25: Usuario user1 = new Usuario();
26: user1.setNombre("ddf1");
Stacktrace:
Caused by:
org.apache.jasper.JasperException: Unable to compile class for JSP:
An error occurred at line: 6 in the generated java file
Only a type can be imported. javax.persistence.EntityManager resolves
to a package
An error occurred at line: 23 in the jsp file: /index.jsp
EntityManager cannot be resolved to a type
20: <body>
21: <h1>Hello World!</h1>
22: <%
23: EntityManager em = EMF.get().createEntityManager();
24:
25: Usuario user1 = new Usuario();
26: user1.setNombre("ddf1");
An error occurred at line: 23 in the jsp file: /index.jsp
The type javax.persistence.EntityManagerFactory cannot be resolved. It
is indirectly referenced from required .class files
20: <body>
21: <h1>Hello World!</h1>
22: <%
23: EntityManager em = EMF.get().createEntityManager();
24:
25: Usuario user1 = new Usuario();
26: user1.setNombre("ddf1");
An error occurred at line: 23 in the jsp file: /index.jsp
The method createEntityManager() is undefined for the type
EntityManagerFactory
20: <body>
21: <h1>Hello World!</h1>
22: <%
23: EntityManager em = EMF.get().createEntityManager();
24:
25: Usuario user1 = new Usuario();
26: user1.setNombre("ddf1");
Stacktrace:
at
org.apache.jasper.compiler.DefaultErrorHandler.javacError(DefaultErrorHandler.java:
92)
at
org.apache.jasper.compiler.ErrorDispatcher.javacError(ErrorDispatcher.java:
330)
at
org.apache.jasper.compiler.JDTCompiler.generateClass(JDTCompiler.java:
439)
at org.apache.jasper.compiler.Compiler.compile(Compiler.java:349)
at org.apache.jasper.compiler.Compiler.compile(Compiler.java:327)
at org.apache.jasper.compiler.Compiler.compile(Compiler.java:314)
at
org.apache.jasper.JspCompilationContext.compile(JspCompilationContext.java:
592)
at
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:
317)
at
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:
313)
at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:260)
at com.google.appengine.tools.development.PrivilegedJspServlet.access
$101(PrivilegedJspServlet.java:23)
at com.google.appengine.tools.development.PrivilegedJspServlet
$2.run(PrivilegedJspServlet.java:59)
at java.security.AccessController.doPrivileged(Native Method)
at
com.google.appengine.tools.development.PrivilegedJspServlet.service(PrivilegedJspServlet.java:
57)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
at org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:
511)
at org.mortbay.jetty.servlet.ServletHandler
$CachedChain.doFilter(ServletHandler.java:1166)
at
com.google.appengine.tools.development.BackendServersFilter.doFilter(BackendServersFilter.java:
97)
at org.mortbay.jetty.servlet.ServletHandler
$CachedChain.doFilter(ServletHandler.java:1157)
at
org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:
388)
at
org.mortbay.jetty.security.SecurityHandler.handle(SecurityHandler.java:
216)
at
org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:
182)
at
org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:
765)
at org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java:
418)
at
com.google.apphosting.utils.jetty.DevAppEngineWebAppContext.handle(DevAppEngineWebAppContext.java:
70)
at org.mortbay.jetty.servlet.Dispatcher.forward(Dispatcher.java:327)
at org.mortbay.jetty.servlet.Dispatcher.forward(Dispatcher.java:126)
at
com.google.appengine.tools.development.StaticFileUtils.serveWelcomeFileAsForward(StaticFileUtils.java:
80)
at
com.google.appengine.tools.development.LocalResourceFileServlet.maybeServeWelcomeFile(LocalResourceFileServlet.java:
254)
at
com.google.appengine.tools.development.LocalResourceFileServlet.doGet(LocalResourceFileServlet.java:
120)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:617)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
at org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:
511)
at org.mortbay.jetty.servlet.ServletHandler
$CachedChain.doFilter(ServletHandler.java:1166)
at
com.google.appengine.tools.development.HeaderVerificationFilter.doFilter(HeaderVerificationFilter.java:
35)
at org.mortbay.jetty.servlet.ServletHandler
$CachedChain.doFilter(ServletHandler.java:1157)
at
com.google.appengine.api.blobstore.dev.ServeBlobFilter.doFilter(ServeBlobFilter.java:
58)
at org.mortbay.jetty.servlet.ServletHandler
$CachedChain.doFilter(ServletHandler.java:1157)
at
com.google.apphosting.utils.servlet.TransactionCleanupFilter.doFilter(TransactionCleanupFilter.java:
43)
at org.mortbay.jetty.servlet.ServletHandler
$CachedChain.doFilter(ServletHandler.java:1157)
at
com.google.appengine.tools.development.StaticFileFilter.doFilter(StaticFileFilter.java:
122)
at org.mortbay.jetty.servlet.ServletHandler
$CachedChain.doFilter(ServletHandler.java:1157)
at
com.google.appengine.tools.development.BackendServersFilter.doFilter(BackendServersFilter.java:
97)
at org.mortbay.jetty.servlet.ServletHandler
$CachedChain.doFilter(ServletHandler.java:1157)
at
org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:
388)
at
org.mortbay.jetty.security.SecurityHandler.handle(SecurityHandler.java:
216)
at
org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:
182)
at
org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:
765)
at org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java:
418)
at
com.google.apphosting.utils.jetty.DevAppEngineWebAppContext.handle(DevAppEngineWebAppContext.java:
70)
at
org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:
152)
at com.google.appengine.tools.development.JettyContainerService
$ApiProxyHandler.handle(JettyContainerService.java:351)
at
org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:
152)
at org.mortbay.jetty.Server.handle(Server.java:326)
at org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:
542)
at org.mortbay.jetty.HttpConnection
$RequestHandler.headerComplete(HttpConnection.java:923)
at org.mortbay.jetty.HttpParser.parseNext(HttpParser.java:547)
at org.mortbay.jetty.HttpParser.parseAvailable(HttpParser.java:212)
at org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:404)
at
org.mortbay.io.nio.SelectChannelEndPoint.run(SelectChannelEndPoint.java:
409)
at org.mortbay.thread.QueuedThreadPool
$PoolThread.run(QueuedThreadPool.java:582)
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