Service not injecting in the Controller
Hi to all! I'm new to spring and i find the same problem always i try to do something. The problem is as follows: in my @Controller bean, spring doesn't inject the @Resorce referencing to the @Service, so when i try to load data from service to an UIData component which is in the controller, the ide shows me a NullPointerException.
I use anotations as you see, and the application is a JSF 2 over Spring 3 and Hibernate 3 too.
Here's the Stack trace of the error:
Code:
org.apache.jasper.el.JspELException: /WEB-INF/jsp/index.jsp(17,12) '#{listarBean.tabla}' Error reading 'tabla' en el tipo paquete.ListarBean
at org.apache.jasper.el.JspValueExpression.getValue(JspValueExpression.java:107)
at javax.faces.component.ComponentStateHelper.eval(ComponentStateHelper.java:190)
at javax.faces.component.ComponentStateHelper.eval(ComponentStateHelper.java:178)
at javax.faces.component.UIData.getValue(UIData.java:554)
at javax.faces.component.UIData.getDataModel(UIData.java:1248)
at javax.faces.component.UIData.setRowIndex(UIData.java:447)
at com.sun.faces.renderkit.html_basic.TableRenderer.encodeBegin(TableRenderer.java:81)
at javax.faces.component.UIComponentBase.encodeBegin(UIComponentBase.java:823)
at javax.faces.component.UIData.encodeBegin(UIData.java:937)
at javax.faces.component.UIComponent.encodeAll(UIComponent.java:1611)
at javax.faces.component.UIComponent.encodeAll(UIComponent.java:1616)
at com.sun.faces.application.view.JspViewHandlingStrategy.doRenderView(JspViewHandlingStrategy.java:420)
at com.sun.faces.application.view.JspViewHandlingStrategy.renderView(JspViewHandlingStrategy.java:209)
at com.sun.faces.application.view.MultiViewHandler.renderView(MultiViewHandler.java:126)
at com.sun.faces.lifecycle.RenderResponsePhase.execute(RenderResponsePhase.java:127)
at com.sun.faces.lifecycle.Phase.doPhase(Phase.java:101)
at com.sun.faces.lifecycle.LifecycleImpl.render(LifecycleImpl.java:139)
at javax.faces.webapp.FacesServlet.service(FacesServlet.java:313)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.netbeans.modules.web.monitor.server.MonitorFilter.doFilter(MonitorFilter.java:393)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:298)
at org.apache.coyote.http11.Http11AprProcessor.process(Http11AprProcessor.java:859)
at org.apache.coyote.http11.Http11AprProtocol$Http11ConnectionHandler.process(Http11AprProtocol.java:579)
at org.apache.tomcat.util.net.AprEndpoint$Worker.run(AprEndpoint.java:1555)
at java.lang.Thread.run(Thread.java:662)
Caused by: java.lang.NullPointerException
at paquete.ListarBean.getTabla(ListarBean.java:29)
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 javax.el.BeanELResolver.getValue(BeanELResolver.java:62)
at javax.el.CompositeELResolver.getValue(CompositeELResolver.java:54)
at com.sun.faces.el.FacesCompositeELResolver.getValue(FacesCompositeELResolver.java:72)
at org.apache.el.parser.AstValue.getValue(AstValue.java:123)
at org.apache.el.ValueExpressionImpl.getValue(ValueExpressionImpl.java:186)
at org.apache.jasper.el.JspValueExpression.getValue(JspValueExpression.java:101)
... 32 more
And now i'll let you the configuration and the code:
Here's the applicationContext.xml :
Code:
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:p="http://www.springframework.org/schema/p"
xmlns:aop="http://www.springframework.org/schema/aop"
xmlns:tx="http://www.springframework.org/schema/tx"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-3.0.xsd
http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-3.0.xsd
http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.0.xsd">
<context:annotation-config />
<context:component-scan base-package="paquete" />
<bean id="propertyConfigurer"
class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer"
p:location="/WEB-INF/jdbc.properties" />
<bean id="dataSource"
class="org.springframework.jdbc.datasource.DriverManagerDataSource"
p:driverClassName="${jdbc.driverClassName}"
p:url="${jdbc.url}"
p:username="${jdbc.username}"
p:password="${jdbc.password}" />
<bean id="sessionFactory" class="org.springframework.orm.hibernate3.annotation.AnnotationSessionFactoryBean">
<property name="dataSource" ref="dataSource" />
<property name="configurationClass" value="org.hibernate.cfg.AnnotationConfiguration" />
<property name="configLocation" value="classpath:${hibernate.cfg.file}" />
</bean>
</beans>
This is the DAO class:
Code:
package paquete;
import java.util.List;
import org.hibernate.SessionFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.orm.hibernate3.support.HibernateDaoSupport;
import org.springframework.stereotype.Repository;
@Repository("hibDao")
public class HibDao extends HibernateDaoSupport implements HibernateDaoInt
{
@Autowired
public HibDao(SessionFactory sessionFactory)
{
super.setSessionFactory(sessionFactory);
}
public void añadirRegistro(Object obj)
{
getHibernateTemplate().saveOrUpdate(obj);
}
public <T> List<T> obtenerRegistros(Class<T> cls)
{
return getHibernateTemplate().loadAll(cls);
}
}
Here's my Service class that use the DAO class defined before:
Code:
package paquete;
import java.util.List;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
@Service("servicioDao")
public class ServicioDao implements ServicioDaoInt
{
private HibernateDaoInt accesoDatos;
@Autowired
public void setAccesoDatos(HibernateDaoInt accesoDatos){this.accesoDatos=accesoDatos;}
public HibernateDaoInt getAccesoDatos(){return this.accesoDatos;}
public Cursos nuevoCurso(){return new Cursos();}
public void escribirCurso(Cursos curso)
{
accesoDatos.añadirRegistro(curso);
}
public List<Cursos> leerCursos()
{
return accesoDatos.obtenerRegistros(Cursos.class);
}
}
The controller one which uses the service defined before:
Code:
package paquete;
import java.io.Serializable;
import javax.faces.component.UIData;
import javax.faces.model.ListDataModel;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.Scope;
import org.springframework.stereotype.Controller;
@Controller("listarBean")
@Scope("session")
public class ListarBean implements Serializable
{
private ServicioDaoInt servicio;
private UIData tabla;
@Autowired
public void setServicio(ServicioDaoInt sd){this.servicio=sd;}
public ServicioDaoInt getServicio(){return this.servicio;}
public String getMensaje(){return this.mensaje;}
public void setMensaje(String msg){this.mensaje=msg;}
public UIData getTabla()
{
this.tabla.setValue(new ListDataModel(this.servicio.leerCursos()));
return this.tabla;
}
public void setTabla(UIData tabla)
{
this.tabla=tabla;
}
}
Thanks for any help you could offer ^^
