Can you please post your model object definitions for Employee and
Department?
Thanks,
Max
On Mon, Feb 15, 2010 at 11:53 PM, sushama <sush.khadil...@gmail.com> wrote:
> import java.util.List;
>
> import javax.jdo.JDOHelper;
> import javax.jdo.PersistenceManager;
> import javax.jdo.PersistenceManagerFactory;
> import javax.jdo.Transaction;
> import javax.persistence.EntityManager;
> import javax.persistence.EntityManagerFactory;
> import javax.persistence.EntityTransaction;
> import javax.persistence.Persistence;
> import javax.persistence.Query;
>
> import com.google.gwt.user.client.Window;
> import com.google.gwt.user.server.rpc.RemoteServiceServlet;
> import com.wissen.enterprisebysush.client.GreetingService;
> import com.wissen.enterprisebysush.server.domainobject.Department;
> import com.wissen.enterprisebysush.server.domainobject.Employee;
>
> /**
> * The server side implementation of the RPC service.
> */
> @SuppressWarnings("serial")
> public class GreetingServiceImpl extends RemoteServiceServlet
> implements GreetingService {
>
> EntityManagerFactory emf =
> Persistence.createEntityManagerFactory("transactions-optional");
>
> public String greetServer(String input) {
> String serverInfo = getServletContext().getServerInfo();
> String userAgent = getThreadLocalRequest().getHeader("User-
> Agent");
> return "Hello, " + input + "!<br><br>I am running " +
> serverInfo + ".<br><br>It looks like you are using:<br>" + userAgent;
> }
>
> @SuppressWarnings("unchecked")
> public void addDept(String dept_name, String dept_head) {
>
> EntityManager em = null;
>
> try {
> em = emf.createEntityManager();
> em.getTransaction().begin();
> Department d = new Department();
> d.setDept_name(dept_name);
> d.setHead(dept_head);
>
> Query q = em.createQuery("select from
> com.wissen.enterprisebysush.server.domainobject.Department d");
> List<Department> deptList = q.getResultList();
>
> for (Department dept : deptList) {
> System.out.println("Department name: " +
> dept.getDept_name());
> }
>
> em.persist(d);
>
> } finally {
> em.getTransaction().commit();
> em.close();
>
> }
>
> }
>
> public void addEmp(String emp_name, String emp_sal, String did) {
> EntityManager em = emf.createEntityManager();
> try {
>
>
> String s = did;
>
> EntityTransaction transaction = em.getTransaction();
> transaction.begin();
> System.out.println("value of Department_name is::" + s);
> System.out.println("Transaction is active and
> is::"+transaction);
>
> // Query q = em.createQuery("select dept_id
> from com.wissen.enterprisebysush.server.domainobject.Department d
> where d.dept_name = ?1");
> // q.setParameter(1, s);
> // System.out.println("Name of Department is::"
> + s);
> // Department dept = (Department)
> q.getSingleResult();
>
> Query q = em.createQuery("select from
> com.wissen.enterprisebysush.server.domainobject.Department d");
> Department dept = (Department) q.getResultList().get(0);
> System.out.println("Name of Department is::" +
> dept.getDept_name());
>
> //System.out.println("Query executed
> Successfully!!!!!!!!!!!!!!" + q.getSingleResult());
> Employee e = new Employee();
> e.setEmp_name("Abdch");
> e.setEmp_sal("5000");
> e.setDepartment(dept);
> em.persist(e);
>
> System.out.println("Transaction: " + transaction);
>
> transaction.commit();
> em.close();
>
> } catch (NullPointerException e) {
> e.printStackTrace();
> System.out.println("Exception::" + e.getCause());
> } finally {
>
> }
> }
>
> }
>
> output::
>
>
> value of Department_name is::Production
> Transaction is active and
> is::org.datanucleus.jpa.entitytransactioni...@1a21c7d
> Name of Department is::Accounts
> Transaction: org.datanucleus.jpa.entitytransactioni...@1a21c7d
> java.lang.NullPointerException
> Exception::null at
> com.google.appengine.api.datastore.KeyFactory.stringToKey(KeyFactory.java:
> 181)
> at
>
> org.datanucleus.store.appengine.DatastoreElementContainerStoreSpecialization.extractElementKey(DatastoreElementContainerStoreSpecialization.java:
> 170)
> at
>
> org.datanucleus.store.appengine.DatastoreAbstractCollectionStoreSpecialization.contains(DatastoreAbstractCollectionStoreSpecialization.java:
> 57)
> at
>
> org.datanucleus.store.mapped.scostore.AbstractCollectionStore.contains(AbstractCollectionStore.java:
> 116)
> at org.datanucleus.sco.backed.List.contains(List.java:455)
> at
>
> org.datanucleus.state.RelationshipManager.processManyToOneBidirectionalRelation(RelationshipManager.java:
> 690)
> at
> org.datanucleus.state.RelationshipManager.process(RelationshipManager.java:
> 294)
> at
>
> org.datanucleus.state.JDOStateManagerImpl.processManagedRelations(JDOStateManagerImpl.java:
> 2377)
> at
>
> org.datanucleus.ObjectManagerImpl.performManagedRelationships(ObjectManagerImpl.java:
> 2706)
> at org.datanucleus.ObjectManagerImpl.flush(ObjectManagerImpl.java:
> 2744)
> at
> org.datanucleus.ObjectManagerImpl.preCommit(ObjectManagerImpl.java:
> 2886)
> at
> org.datanucleus.TransactionImpl.internalPreCommit(TransactionImpl.java:
> 348)
> at org.datanucleus.TransactionImpl.commit(TransactionImpl.java:235)
> at
>
> org.datanucleus.jpa.EntityTransactionImpl.commit(EntityTransactionImpl.java:
> 104)
> at
>
> com.wissen.enterprisebysush.server.GreetingServiceImpl.addEmp(GreetingServiceImpl.java:
> 94)
> at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> at
> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:
> 39)
> at
>
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:
> 25)
> at java.lang.reflect.Method.invoke(Method.java:597)
> at
> com.google.gwt.user.server.rpc.RPC.invokeAndEncodeResponse(RPC.java:
> 527)
> at
>
> com.google.gwt.user.server.rpc.RemoteServiceServlet.processCall(RemoteServiceServlet.java:
> 166)
> at
>
> com.google.gwt.user.server.rpc.RemoteServiceServlet.doPost(RemoteServiceServlet.java:
> 86)
> at javax.servlet.http.HttpServlet.service(HttpServlet.java:713)
> at javax.servlet.http.HttpServlet.service(HttpServlet.java:806)
> at
> org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:
> 487)
> at org.mortbay.jetty.servlet.ServletHandler
> $CachedChain.doFilter(ServletHandler.java:1093)
> at
>
> com.google.apphosting.utils.servlet.TransactionCleanupFilter.doFilter(TransactionCleanupFilter.java:
> 43)
> at org.mortbay.jetty.servlet.ServletHandler
> $CachedChain.doFilter(ServletHandler.java:1084)
> at
> org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:
> 360)
> at
> org.mortbay.jetty.security.SecurityHandler.handle(SecurityHandler.java:
> 216)
> at
> org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:
> 181)
> at
> org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:
> 712)
> at org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java:
> 405)
> at
>
> com.google.apphosting.utils.jetty.DevAppEngineWebAppContext.handle(DevAppEngineWebAppContext.java:
> 54)
> at
> org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:
> 139)
> at com.google.appengine.tools.development.JettyContainerService
> $ApiProxyHandler.handle(JettyContainerService.java:306)
> at
> org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:
> 139)
> at org.mortbay.jetty.Server.handle(Server.java:313)
> at
> org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:
> 506)
> at org.mortbay.jetty.HttpConnection
> $RequestHandler.content(HttpConnection.java:844)
> at org.mortbay.jetty.HttpParser.parseNext(HttpParser.java:644)
> at org.mortbay.jetty.HttpParser.parseAvailable(HttpParser.java:211)
> at org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:381)
> at
> org.mortbay.io.nio.SelectChannelEndPoint.run(SelectChannelEndPoint.java:
> 396)
> at org.mortbay.thread.BoundedThreadPool
> $PoolThread.run(BoundedThreadPool.java:442)
>
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