java - Injecting EntityManager results in NullPointerException in TomEE? -

here's moviebean.java:

@stateless public class moviebean {  @persistencecontext private entitymanager em;  /**  * default constructor.   */ public moviebean() {     // todo auto-generated constructor stub }  public list<movie> getallmovies() {     query query = em.createquery("select m movie m");     return query.getresultlist(); } 

my moviesservlet uses moviebean this:

@webservlet("/moviesservlet") public class moviesservlet extends httpservlet { private static final long serialversionuid = 1l;  @ejb private moviebean mb;  private list<movie> getmovies() {     return mb.getallmovies(); } 

and in doget method use getmovies method list of movies. however, following exceptions:

javax.ejb.ejbexception: bean encountered non-application exception; nested exception is:  java.lang.nullpointerexception org.apache.openejb.core.ivm.baseejbproxyhandler.convertexception(baseejbproxyhandler.java:363) org.apache.openejb.core.ivm.baseejbproxyhandler.invoke(baseejbproxyhandler.java:283) bg.cinemate.beans.moviebean$localbeanproxy.getallmovies(bg/cinemate/beans/moviebean.java) bg.cinemate.servlets.moviesservlet.getmovies(moviesservlet.java:27) bg.cinemate.servlets.moviesservlet.doget(moviesservlet.java:42) javax.servlet.http.httpservlet.service(httpservlet.java:621) javax.servlet.http.httpservlet.service(httpservlet.java:728)  java.lang.nullpointerexception bg.cinemate.beans.moviebean.getallmovies(moviebean.java:31) sun.reflect.nativemethodaccessorimpl.invoke0(native method) sun.reflect.nativemethodaccessorimpl.invoke(nativemethodaccessorimpl.java:57) sun.reflect.delegatingmethodaccessorimpl.invoke(delegatingmethodaccessorimpl.java:43) java.lang.reflect.method.invoke(method.java:601) org.apache.openejb.core.interceptor.reflectioninvocationcontext$invocation.invoke(reflectioninvocationcontext.java:181) org.apache.openejb.core.interceptor.reflectioninvocationcontext.proceed(reflectioninvocationcontext.java:163) org.apache.openejb.cdi.cdiinterceptor.invoke(cdiinterceptor.java:126) org.apache.openejb.cdi.cdiinterceptor.access$000(cdiinterceptor.java:42) org.apache.openejb.cdi.cdiinterceptor$1.call(cdiinterceptor.java:63) org.apache.openejb.cdi.cdiinterceptor.aroundinvoke(cdiinterceptor.java:69) sun.reflect.nativemethodaccessorimpl.invoke0(native method) sun.reflect.nativemethodaccessorimpl.invoke(nativemethodaccessorimpl.java:57) sun.reflect.delegatingmethodaccessorimpl.invoke(delegatingmethodaccessorimpl.java:43) java.lang.reflect.method.invoke(method.java:601) org.apache.openejb.core.interceptor.reflectioninvocationcontext$invocation.invoke(reflectioninvocationcontext.java:181) org.apache.openejb.core.interceptor.reflectioninvocationcontext.proceed(reflectioninvocationcontext.java:163) org.apache.openejb.monitoring.statsinterceptor.record(statsinterceptor.java:176) org.apache.openejb.monitoring.statsinterceptor.invoke(statsinterceptor.java:95) sun.reflect.nativemethodaccessorimpl.invoke0(native method) sun.reflect.nativemethodaccessorimpl.invoke(nativemethodaccessorimpl.java:57) sun.reflect.delegatingmethodaccessorimpl.invoke(delegatingmethodaccessorimpl.java:43) java.lang.reflect.method.invoke(method.java:601) org.apache.openejb.core.interceptor.reflectioninvocationcontext$invocation.invoke(reflectioninvocationcontext.java:181) org.apache.openejb.core.interceptor.reflectioninvocationcontext.proceed(reflectioninvocationcontext.java:163) org.apache.openejb.core.interceptor.interceptorstack.invoke(interceptorstack.java:138) org.apache.openejb.core.stateless.statelesscontainer._invoke(statelesscontainer.java:239) org.apache.openejb.core.stateless.statelesscontainer.invoke(statelesscontainer.java:191) org.apache.openejb.core.ivm.ejbobjectproxyhandler.synchronizedbusinessmethod(ejbobjectproxyhandler.java:246) org.apache.openejb.core.ivm.ejbobjectproxyhandler.businessmethod(ejbobjectproxyhandler.java:241) org.apache.openejb.core.ivm.ejbobjectproxyhandler._invoke(ejbobjectproxyhandler.java:83) org.apache.openejb.core.ivm.baseejbproxyhandler.invoke(baseejbproxyhandler.java:279) bg.cinemate.beans.moviebean$localbeanproxy.getallmovies(bg/cinemate/beans/moviebean.java) bg.cinemate.servlets.moviesservlet.getmovies(moviesservlet.java:27) bg.cinemate.servlets.moviesservlet.doget(moviesservlet.java:42) javax.servlet.http.httpservlet.service(httpservlet.java:621) javax.servlet.http.httpservlet.service(httpservlet.java:728) 

my persistance.xml file configured this:

<?xml version="1.0" encoding="utf-8" ?>     <persistence xmlns:xsi="http://www.w3.org/2001/xmlschema-instance"             xsi:schemalocation="http://java.sun.com/xml/ns/persistence http://java.sun.com/xml/ns/persistence/persistence_2_0.xsd"             version="2.0" xmlns="http://java.sun.com/xml/ns/persistence">             <persistence-unit name="cinema" transaction-type="resource_local">                     <properties>                             <property name="javax.persistence.jdbc.url" value="jdbc:mysql://localhost:3306/cinema" />                             <property name="javax.persistence.jdbc.driver" value="com.mysql.jdbc.driver" />                             <property name="javax.persistence.jdbc.user" value="root" />                             <property name="javax.persistence.jdbc.password" value="password" />                             <property name="eclipselink.ddl-generation" value="drop-and-create-tables" />                             <property name="eclipselink.ddl-generation.output-mode" value="database" />                     </properties>              </persistence-unit>     </persistence> 

i tried changing (tried 1 shown here) not start server (says time limit has exceeded, after tried changing 200 seconds). use java7, openejb , tomee.

edit 1: changed persistence.xml this:

    <persistence xmlns="http://java.sun.com/xml/ns/persistence" version="1.0">       <persistence-unit transaction-type="resource_local" name="cinema">         <jta-data-source>java:openejb/connector/default jdbc database</jta-data-source>         <non-jta-data-source>java:openejb/connector/default unmanaged jdbc database</non-jta-data-source>         <class>bg.cinemate.beans.moviebean</class>          <properties>           <property name="openjpa.jdbc.synchronizemappings" value="buildschema(foreignkeys=true)"/>         </properties>       </persistence-unit>     </persistence> 

tried @persistencecontext(unitname="cinema") , server started, gives me same exceptions.

i had same problem while using openjpa2 similar structure. 1 solved nullpointer problem changing transaction-type="resource_local" transaction-type="jta". though in case exception: org.apache.openjpa.persistence.persistenceexception: user lacks privilege or object not found.

correction: last exception solved , transactions running after mapped correctly datasource tomee persistence.xml

tomee.xml:

<resource id="mydatabaseds" type="datasource">     jdbcdriver org.postgresql.driver     jdbcurl jdbc:postgresql://localhost:5432/mydatabase     username myuser     password mypassword     jtamanaged true </resource> 

persistence.xml:

<?xml version="1.0" encoding="utf-8"?> <persistence xmlns="http://java.sun.com/xml/ns/persistence" xmlns:xsi="http://www.w3.org/2001/xmlschema-instance" xsi:schemalocation="http://java.sun.com/xml/ns/persistence http://java.sun.com/xml/ns/persistence/persistence_2_0.xsd" version="2.0">      <persistence-unit name="mypu" transaction-type="jta">         <provider>org.apache.openjpa.persistence.persistenceproviderimpl</provider>         <jta-data-source>mydatabaseds</jta-data-source>     </persistence-unit> </persistence> 

don't forget add jdbc driver lib {tomee}/lib dir.