Boa noite pessoal, estou começando com o seam e apareceram algumas dúvidas:
Sempre que tento executar essa consulta no banco de dados recebo um null pointer por parte do entity manager.
Iniciei o projeto com a estrutura pronta e pelo tutoriais do seam não sei se preciso configurar mais alguma coisa.
Segue o código:
private TipoServicoDAO() {}
@PersistenceContext
private EntityManager em;
private static TipoServicoDAO tipoServicoDAO;
public static TipoServicoDAO getInstance() {
if(tipoServicoDAO == null) {
tipoServicoDAO = new TipoServicoDAO();
}
return tipoServicoDAO;
}
public List<TipoServico> findAll() throws Exception{
List<TipoServico> lista = em.createQuery("FROM TipoServico").getResultList();
return lista;
}Erro:
14:31:18,198 ERROR [STDERR] java.lang.NullPointerException
14:31:18,201 ERROR [STDERR] at br.mil.eb.pmb.sgopnr.dao.TipoServicoDAO.findAll(TipoServicoDAO.java:27)
14:31:18,202 ERROR [STDERR] at br.mil.eb.pmb.sgopnr.action.SolicitarServicoAction.comboTipoServico(SolicitarServicoAction.java:31)
14:31:18,204 ERROR [STDERR] at br.mil.eb.pmb.sgopnr.session.Authenticator.authenticate(Authenticator.java:30)
14:31:18,205 ERROR [STDERR] at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
14:31:18,206 ERROR [STDERR] at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
14:31:18,208 ERROR [STDERR] at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
14:31:18,209 ERROR [STDERR] at java.lang.reflect.Method.invoke(Method.java:597)
14:31:18,211 ERROR [STDERR] at org.jboss.seam.util.Reflections.invoke(Reflections.java:22)
14:31:18,212 ERROR [STDERR] at org.jboss.seam.intercept.RootInvocationContext.proceed(RootInvocationContext.java:32)
14:31:18,213 ERROR [STDERR] at org.jboss.seam.intercept.SeamInvocationContext.proceed(SeamInvocationContext.java:56)
14:31:18,215 ERROR [STDERR] at org.jboss.seam.transaction.RollbackInterceptor.aroundInvoke(RollbackInterceptor.java:28)
14:31:18,216 ERROR [STDERR] at org.jboss.seam.intercept.SeamInvocationContext.proceed(SeamInvocationContext.java:68)
14:31:18,218 ERROR [STDERR] at org.jboss.seam.core.BijectionInterceptor.aroundInvoke(BijectionInterceptor.java:77)
14:31:18,219 ERROR [STDERR] at org.jboss.seam.intercept.SeamInvocationContext.proceed(SeamInvocationContext.java:68)
14:31:18,221 ERROR [STDERR] at org.jboss.seam.core.MethodContextInterceptor.aroundInvoke(MethodContextInterceptor.java:44)
14:31:18,222 ERROR [STDERR] at org.jboss.seam.intercept.SeamInvocationContext.proceed(SeamInvocationContext.java:68)
14:31:18,223 ERROR [STDERR] at org.jboss.seam.intercept.RootInterceptor.invoke(RootInterceptor.java:107)
14:31:18,225 ERROR [STDERR] at org.jboss.seam.intercept.JavaBeanInterceptor.interceptInvocation(JavaBeanInterceptor.java:185)
14:31:18,226 ERROR [STDERR] at org.jboss.seam.intercept.JavaBeanInterceptor.invoke(JavaBeanInterceptor.java:103)
14:31:18,228 ERROR [STDERR] at br.mil.eb.pmb.sgopnr.session.Authenticator_$$_javassist_seam_2.authenticate(Authenticator_$$_javassist_seam_2.java)
14:31:18,229 ERROR [STDERR] at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
14:31:18,231 ERROR [STDERR] at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
14:31:18,232 ERROR [STDERR] at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
14:31:18,233 ERROR [STDERR] at java.lang.reflect.Method.invoke(Method.java:597)
14:31:18,235 ERROR [STDERR] at org.jboss.el.util.ReflectionUtil.invokeMethod(ReflectionUtil.java:335)
14:31:18,236 ERROR [STDERR] at org.jboss.el.util.ReflectionUtil.invokeMethod(ReflectionUtil.java:348)
14:31:18,237 ERROR [STDERR] at org.jboss.el.parser.AstPropertySuffix.invoke(AstPropertySuffix.java:58)
14:31:18,238 ERROR [STDERR] at org.jboss.el.parser.AstValue.invoke(AstValue.java:96)
14:31:18,240 ERROR [STDERR] at org.jboss.el.MethodExpressionImpl.invoke(MethodExpressionImpl.java:276)
14:31:18,241 ERROR [STDERR] at com.sun.facelets.el.TagMethodExpression.invoke(TagMethodExpression.java:68)
14:31:18,243 ERROR [STDERR] at javax.faces.component.MethodBindingMethodExpressionAdapter.invoke(MethodBindingMethodExpressionAdapter.java:88)
14:31:18,244 ERROR [STDERR] at com.sun.faces.application.ActionListenerImpl.processAction(ActionListenerImpl.java:102)
14:31:18,246 ERROR [STDERR] at javax.faces.component.UICommand.broadcast(UICommand.java:387)
14:31:18,247 ERROR [STDERR] at org.ajax4jsf.component.AjaxViewRoot.processEvents(AjaxViewRoot.java:321)
14:31:18,248 ERROR [STDERR] at org.ajax4jsf.component.AjaxViewRoot.broadcastEvents(AjaxViewRoot.java:296)
14:31:18,249 ERROR [STDERR] at org.ajax4jsf.component.AjaxViewRoot.processPhase(AjaxViewRoot.java:253)
14:31:18,251 ERROR [STDERR] at org.ajax4jsf.component.AjaxViewRoot.processApplication(AjaxViewRoot.java:466)
14:31:18,252 ERROR [STDERR] at com.sun.faces.lifecycle.InvokeApplicationPhase.execute(InvokeApplicationPhase.java:82)
14:31:18,253 ERROR [STDERR] at com.sun.faces.lifecycle.Phase.doPhase(Phase.java:100)
14:31:18,255 ERROR [STDERR] at com.sun.faces.lifecycle.LifecycleImpl.execute(LifecycleImpl.java:118)
14:31:18,256 ERROR [STDERR] at javax.faces.webapp.FacesServlet.service(FacesServlet.java:265)
14:31:18,257 ERROR [STDERR] at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
14:31:18,259 ERROR [STDERR] at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
14:31:18,260 ERROR [STDERR] at org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:83)
14:31:18,261 ERROR [STDERR] at org.jboss.seam.web.IdentityFilter.doFilter(IdentityFilter.java:40)
14:31:18,263 ERROR [STDERR] at org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69)
14:31:18,264 ERROR [STDERR] at org.jboss.seam.web.MultipartFilter.doFilter(MultipartFilter.java:90)
14:31:18,265 ERROR [STDERR] at org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69)
14:31:18,267 ERROR [STDERR] at org.jboss.seam.web.ExceptionFilter.doFilter(ExceptionFilter.java:64)
14:31:18,268 ERROR [STDERR] at org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69)
14:31:18,269 ERROR [STDERR] at org.jboss.seam.web.RedirectFilter.doFilter(RedirectFilter.java:45)
14:31:18,271 ERROR [STDERR] at org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69)
14:31:18,272 ERROR [STDERR] at org.ajax4jsf.webapp.BaseXMLFilter.doXmlFilter(BaseXMLFilter.java:178)
14:31:18,273 ERROR [STDERR] at org.ajax4jsf.webapp.BaseFilter.handleRequest(BaseFilter.java:290)
14:31:18,275 ERROR [STDERR] at org.ajax4jsf.webapp.BaseFilter.processUploadsAndHandleRequest(BaseFilter.java:368)
14:31:18,276 ERROR [STDERR] at org.ajax4jsf.webapp.BaseFilter.doFilter(BaseFilter.java:495)
14:31:18,277 ERROR [STDERR] at org.jboss.seam.web.Ajax4jsfFilter.doFilter(Ajax4jsfFilter.java:56)
14:31:18,279 ERROR [STDERR] at org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69)
14:31:18,280 ERROR [STDERR] at org.jboss.seam.web.LoggingFilter.doFilter(LoggingFilter.java:60)
14:31:18,281 ERROR [STDERR] at org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69)
14:31:18,283 ERROR [STDERR] at org.jboss.seam.web.HotDeployFilter.doFilter(HotDeployFilter.java:53)
14:31:18,284 ERROR [STDERR] at org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69)
14:31:18,285 ERROR [STDERR] at org.jboss.seam.servlet.SeamFilter.doFilter(SeamFilter.java:158)
14:31:18,286 ERROR [STDERR] at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
14:31:18,288 ERROR [STDERR] at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
14:31:18,289 ERROR [STDERR] at org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFilter.java:96)
14:31:18,291 ERROR [STDERR] at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
14:31:18,292 ERROR [STDERR] at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
14:31:18,294 ERROR [STDERR] at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:235)
14:31:18,295 ERROR [STDERR] at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
14:31:18,296 ERROR [STDERR] at org.jboss.web.tomcat.security.SecurityAssociationValve.invoke(SecurityAssociationValve.java:190)
14:31:18,298 ERROR [STDERR] at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:433)
14:31:18,299 ERROR [STDERR] at org.jboss.web.tomcat.security.JaccContextValve.invoke(JaccContextValve.java:92)
14:31:18,301 ERROR [STDERR] at org.jboss.web.tomcat.security.SecurityContextEstablishmentValve.process(SecurityContextEstablishmentValve.java:126)
14:31:18,302 ERROR [STDERR] at org.jboss.web.tomcat.security.SecurityContextEstablishmentValve.invoke(SecurityContextEstablishmentValve.java:70)
14:31:18,304 ERROR [STDERR] at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
14:31:18,305 ERROR [STDERR] at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
14:31:18,317 ERROR [STDERR] at org.jboss.web.tomcat.service.jca.CachedConnectionValve.invoke(CachedConnectionValve.java:158)
14:31:18,318 ERROR [STDERR] at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
14:31:18,320 ERROR [STDERR] at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:330)
14:31:18,321 ERROR [STDERR] at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:829)
14:31:18,323 ERROR [STDERR] at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:598)
14:31:18,326 ERROR [STDERR] at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:447)
14:31:18,327 ERROR [STDERR] at java.lang.Thread.run(Thread.java:619)
Obrigado