Discussion :

[promachos]

j'essaye de faire un commit de mon Objet appelé plat depuis mon controller
Mais j'obtiens une stacktrace suivante



sur ma couche DAO
public void persist(T t) {
jpaTemplate.persist(t);
}

quelqu'un pourrait il maider ??
quest ce que jai oublié ?

Code :

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org.springframework.dao.InvalidDataAccessApiUsageException: detached entity passed to persist: com.myshop.domain.plate.Plat; nested exception is org.hibernate.PersistentObjectException: detached entity passed to persist: com.myshop.domain.plate.Plat
	at org.springframework.orm.hibernate3.SessionFactoryUtils.convertHibernateAccessException(SessionFactoryUtils.java:651)
	at org.springframework.orm.jpa.vendor.HibernateJpaDialect.translateExceptionIfPossible(HibernateJpaDialect.java:100)
	at org.springframework.dao.support.DataAccessUtils.translateIfNecessary(DataAccessUtils.java:213)
	at org.springframework.orm.jpa.JpaAccessor.translateIfNecessary(JpaAccessor.java:152)
	at org.springframework.orm.jpa.JpaTemplate.execute(JpaTemplate.java:188)
	at org.springframework.orm.jpa.JpaTemplate.persist(JpaTemplate.java:262)
	at com.myshop.dao.plate.AbstractDAO.persist(AbstractDAO.java:43)
	at com.myshop.dao.plate.PlatHome.persist(PlatHome.java:17)
	at com.myshop.service.plate.PlatService.persist(PlatService.java:29)
	at com.myshop.controller.plate.PlatController.create(PlatController.java:48)
	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 org.springframework.web.bind.annotation.support.HandlerMethodInvoker.invokeHandlerMethod(HandlerMethodInvoker.java:175)
	at org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter.invokeHandlerMethod(AnnotationMethodHandlerAdapter.java:421)
	at org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter.handle(AnnotationMethodHandlerAdapter.java:409)
	at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:774)
	at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:719)
	at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:644)
	at org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:560)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:727)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:820)
	at org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:487)
	at org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:362)
	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:726)
	at org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java:405)
	at org.mortbay.jetty.servlet.Dispatcher.forward(Dispatcher.java:285)
	at org.mortbay.jetty.servlet.Dispatcher.forward(Dispatcher.java:126)
	at org.tuckey.web.filters.urlrewrite.NormalRewrittenUrl.doRewrite(NormalRewrittenUrl.java:195)
	at org.tuckey.web.filters.urlrewrite.RuleChain.handleRewrite(RuleChain.java:159)
	at org.tuckey.web.filters.urlrewrite.RuleChain.doRules(RuleChain.java:141)
	at org.tuckey.web.filters.urlrewrite.UrlRewriter.processRequest(UrlRewriter.java:90)
	at org.tuckey.web.filters.urlrewrite.UrlRewriteFilter.doFilter(UrlRewriteFilter.java:417)
	at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1084)
	at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:88)
	at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:76)
	at org.mortbay.jetty.servlet.ServletHandler$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:726)
	at org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java:405)
	at org.mortbay.jetty.handler.ContextHandlerCollection.handle(ContextHandlerCollection.java:206)
	at org.mortbay.jetty.handler.HandlerCollection.handle(HandlerCollection.java:114)
	at org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152)
	at org.mortbay.jetty.Server.handle(Server.java:324)
	at org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:505)
	at org.mortbay.jetty.HttpConnection$RequestHandler.content(HttpConnection.java:843)
	at org.mortbay.jetty.HttpParser.parseNext(HttpParser.java:648)
	at org.mortbay.jetty.HttpParser.parseAvailable(HttpParser.java:211)
	at org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:380)
	at org.mortbay.io.nio.SelectChannelEndPoint.run(SelectChannelEndPoint.java:395)
	at org.mortbay.thread.QueuedThreadPool$PoolThread.run(QueuedThreadPool.java:488)
Caused by: org.hibernate.PersistentObjectException: detached entity passed to persist: com.myshop.domain.plate.Plat
	at org.hibernate.event.def.DefaultPersistEventListener.onPersist(DefaultPersistEventListener.java:102)
	at org.hibernate.event.def.DefaultPersistEventListener.onPersist(DefaultPersistEventListener.java:61)
	at org.hibernate.impl.SessionImpl.firePersist(SessionImpl.java:645)
	at org.hibernate.impl.SessionImpl.persist(SessionImpl.java:619)
	at org.hibernate.impl.SessionImpl.persist(SessionImpl.java:623)
	at org.hibernate.ejb.AbstractEntityManagerImpl.persist(AbstractEntityManagerImpl.java:220)
	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 org.springframework.orm.jpa.ExtendedEntityManagerCreator$ExtendedEntityManagerInvocationHandler.invoke(ExtendedEntityManagerCreator.java:365)
	at $Proxy24.persist(Unknown Source)
	at org.springframework.orm.jpa.JpaTemplate$5.doInJpa(JpaTemplate.java:264)
	at org.springframework.orm.jpa.JpaTemplate.execute(JpaTemplate.java:183)
	... 51 more
2010-09-21 14:45:02.012::WARN:  Nested in org.springframework.dao.InvalidDataAccessApiUsageException: detached entity passed to persist: com.myshop.domain.plate.Plat; nested exception is org.hibernate.PersistentObjectException: detached entity passed to persist: com.myshop.domain.plate.Plat:
org.hibernate.PersistentObjectException: detached entity passed to persist: com.myshop.domain.plate.Plat
	at org.hibernate.event.def.DefaultPersistEventListener.onPersist(DefaultPersistEventListener.java:102)
	at org.hibernate.event.def.DefaultPersistEventListener.onPersist(DefaultPersistEventListener.java:61)
	at org.hibernate.impl.SessionImpl.firePersist(SessionImpl.java:645)
	at org.hibernate.impl.SessionImpl.persist(SessionImpl.java:619)
	at org.hibernate.impl.SessionImpl.persist(SessionImpl.java:623)
	at org.hibernate.ejb.AbstractEntityManagerImpl.persist(AbstractEntityManagerImpl.java:220)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
	at java.lang.reflect.Method.invoke(Method.java:597)
	at org.springframework.orm.jpa.ExtendedEntityManagerCreator$ExtendedEntityManagerInvocationHandler.invoke(ExtendedEntityManagerCreator.java:365)
	at $Proxy24.persist(Unknown Source)
	at org.springframework.orm.jpa.JpaTemplate$5.doInJpa(JpaTemplate.java:264)
	at org.springframework.orm.jpa.JpaTemplate.execute(JpaTemplate.java:183)
	at org.springframework.orm.jpa.JpaTemplate.persist(JpaTemplate.java:262)
	at com.myshop.dao.plate.AbstractDAO.persist(AbstractDAO.java:43)
	at com.myshop.dao.plate.PlatHome.persist(PlatHome.java:17)
	at com.myshop.service.plate.PlatService.persist(PlatService.java:29)
	at com.myshop.controller.plate.PlatController.create(PlatController.java:48)
	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 org.springframework.web.bind.annotation.support.HandlerMethodInvoker.invokeHandlerMethod(HandlerMethodInvoker.java:175)
	at org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter.invokeHandlerMethod(AnnotationMethodHandlerAdapter.java:421)
	at org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter.handle(AnnotationMethodHandlerAdapter.java:409)
	at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:774)
	at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:719)
	at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:644)
	at org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:560)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:727)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:820)
	at org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:487)
	at org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:362)
	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:726)
	at org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java:405)
	at org.mortbay.jetty.servlet.Dispatcher.forward(Dispatcher.java:285)
	at org.mortbay.jetty.servlet.Dispatcher.forward(Dispatcher.java:126)
	at org.tuckey.web.filters.urlrewrite.NormalRewrittenUrl.doRewrite(NormalRewrittenUrl.java:195)
	at org.tuckey.web.filters.urlrewrite.RuleChain.handleRewrite(RuleChain.java:159)
	at org.tuckey.web.filters.urlrewrite.RuleChain.doRules(RuleChain.java:141)
	at org.tuckey.web.filters.urlrewrite.UrlRewriter.processRequest(UrlRewriter.java:90)
	at org.tuckey.web.filters.urlrewrite.UrlRewriteFilter.doFilter(UrlRewriteFilter.java:417)
	at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1084)
	at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:88)
	at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:76)
	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)

Mon Service :

Code :

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package com.myshop.service.plate;
 
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Propagation;
import org.springframework.transaction.annotation.Transactional;
 
import com.myshop.dao.plate.IPlatHome;
import com.myshop.domain.plate.Plat;
 
@Service("platService")
@Transactional(propagation = Propagation.REQUIRED, readOnly = true)
public class PlatService implements IPlateService{
 
 
	@Autowired
	private IPlatHome mPlatDao;
 
	public Plat findById(Integer id) {
		return mPlatDao.findById(id);
	}
 
	public Plat merge(Plat detachedInstance) {
		return mPlatDao.merge(detachedInstance);
	}
 
	public void persist(Plat transientInstance) {
		mPlatDao.persist(transientInstance);
	}
 
	public void remove(Plat persistentInstance) {
		mPlatDao.remove(persistentInstance);
	}
 
}

Mon DAO :

Code :

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package com.myshop.dao.plate;
 
import java.util.Collection;
 
import javax.persistence.EntityManagerFactory;
import javax.persistence.PersistenceContext;
import javax.persistence.PersistenceContextType;
import javax.persistence.PersistenceUnit;
 
import org.springframework.orm.jpa.JpaTemplate;
import org.springframework.transaction.annotation.Transactional;
 
 
public abstract class AbstractDAO<T>  {
 
        private Class<T> entityClass;
 
        protected JpaTemplate jpaTemplate;
 
        protected Class<T> getEntityClass() {
                return entityClass;
        }
 
        @PersistenceUnit(name="jpaTutos")
        public void setEntityManagerFactory(EntityManagerFactory emf) {
                this.jpaTemplate = new JpaTemplate(emf);
        }
 
        @SuppressWarnings("unchecked")
        public AbstractDAO(Class<T> entityClass) {
                this.entityClass = entityClass;
        }
 
 
 
        @SuppressWarnings("unchecked")
        public Collection<T> getAll() {
                return jpaTemplate.find("from " + entityClass.getSimpleName());
        }
 
 
        public void persist(T t) {
 
    		jpaTemplate.persist(t);
    	}
 
        public T getById(Long id) {
                return jpaTemplate.find(entityClass, id);
        }
 
        public void remove(T t) {
                jpaTemplate.remove(t);
        }
 
        /*
        public void removeById(final Long id) {
                jpaTemplate.execute(new JpaCallback() {
                        @Override
                        public Object doInJpa(EntityManager em) {
                                Query q =
                                        em.createQuery("delete " + entityClass.getSimpleName() + " e where e.id = :id");
                                q.setParameter("id", id);
                                q.executeUpdate();
                                return null;
                        }
                });
        }*/
 
        public void removeById(final Long id) {
                jpaTemplate.remove(jpaTemplate.find(entityClass, id));
                /*jpaTemplate.execute(new JpaCallback() {
                        @Override
                        public Object doInJpa(EntityManager em) {
                                Object entity = em.find(entityClass, id);
                                em.remove(entity);
                                return null;
                        }
                });*/
        }
 
 
        public void update(T t) {
                jpaTemplate.merge(t);
        }
 
}
 
 
package com.myshop.dao.plate;
 
// Generated 19 sept. 2010 16:22:36 by Hibernate Tools 3.2.4.GA
 
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.springframework.stereotype.Repository;
 
import com.myshop.domain.plate.Plat;
 
 
/**
 * Home object for domain model class Plat.
 * @see com.myshop.domain.plate.Plat
 * @author Hibernate Tools
 */
@Repository
public class PlatHome extends AbstractDAO<Plat> implements IPlatHome {
 
	private static final Log log = LogFactory.getLog(PlatHome.class);
 
 
	public PlatHome(){
		super(Plat.class);
	}
 
 
	public Plat findById(Integer id) {
		// TODO Auto-generated method stub
		return null;
	}
 
 
	public Plat merge(Plat detachedInstance) {
		// TODO Auto-generated method stub
		return null;
	}
 
 
}

Ma configuraion JPA Spring :

Code :

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<?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:tx="http://www.springframework.org/schema/tx" xmlns:util="http://www.springframework.org/schema/util"
	xmlns:p="http://www.springframework.org/schema/p" xmlns:aop="http://www.springframework.org/schema/aop"
	xsi:schemaLocation="http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-2.5.xsd
		http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
		http://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util-2.5.xsd
		http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-2.5.xsd
		http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-2.5.xsd">
 
 
	<!--  Déclaration du PropertyPlaceholderConfigurer -->
	<bean id="propertyConfigurer"
		class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
		<property name="locations">
			<list>
				<value>classpath*:db.properties</value>
			</list>
		</property>
	</bean>
 
	<!-- traduction des exceptions -->
	<bean class="org.springframework.dao.annotation.PersistenceExceptionTranslationPostProcessor" />
 
 
	<bean class="org.springframework.orm.jpa.support.PersistenceAnnotationBeanPostProcessor" />
 
	<bean id="entityManagerFactory" class="org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean">
		<property name="persistenceXmlLocation" value="classpath*:META-INF/persistence.xml"></property>
		<property name="persistenceUnitName" value="jpaTutos" />
		<property name="dataSource" ref="dataSource" />
		<property name="jpaVendorAdapter">
			<bean class="org.springframework.orm.jpa.vendor.HibernateJpaVendorAdapter">
				<property name="database" value="MYSQL" />
				<property name="showSql" value="true" />
			</bean>
		</property>
	</bean>
 
	<bean id="dataSource"
		class="org.springframework.jdbc.datasource.DriverManagerDataSource">
		<property name="driverClassName" value="com.mysql.jdbc.Driver" />
		<property name="url" value="jdbc:mysql://localhost/restaurant" />
		<property name="username" value="root" />
		<property name="password" value="" />
	</bean>
 
	<bean id="transactionManager" class="org.springframework.orm.jpa.JpaTransactionManager">
		<property name="entityManagerFactory" ref="entityManagerFactory" />
	</bean>
 
	<!--
		Indique a Spring que les transactions sont geree par @Transactional
	-->
	<tx:annotation-driven transaction-manager="transactionManager" />
 
	<!--
		Indique a Spring que la configuration des beans se fait par
		annotations
	-->
	<context:annotation-config />
	<context:component-scan base-package="com.myshop" />
 
 
 
</beans>

[MaitreKaio]

org.springframework.dao.InvalidDataAccessApiUsageException: detached entity passed to persist: com.myshop.domain.plate.Plat; nested exception is org.hibernate.PersistentObjectException: detached entity passed to persist: com.myshop.domain.plate.Plat at org.springframework.orm.hibernate3.SessionFactoryUtils.convertHibernateAccessException(SessionFactoryUtils.java:651)

Autrement dit, tu dois être en train de vouloir enregistrer une entité détachée du gestionnaire de persistence. Il te faudrait plutôt la réattacher en faisant un merge, et non un persist

[promachos]

En modifiant persist par merge jobtiens la requete SQL suivante
jpaTemplate.merge(t); voir la log ci dessous

Ce que je souhaiterais c'est inserer mon Objet de Donnée entier Plat dans la base (Insert INTO ... ) d'ou mon code initiale jpaTemplate.persist(plat);
Comment Faire ? Quelqu'un parait il maider ?

Code :

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2010-09-21 17:41:10.133::INFO:  Started SelectChannelConnector@0.0.0.0:8080
[INFO] Started Jetty Server
[INFO] Starting scanner at interval of 10 seconds.
Hibernate: select plat0_.id as id0_0_, plat0_.Description as Descript2_0_0_, plat0_.NomPlat as NomPlat0_0_, plat0_.Type as Type0_0_ from restaurant.plat plat0_ where plat0_.id=?

Mon fichier de persistence.xml dans /META-INF

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<?xml version="1.0" encoding="UTF-8"?>
<persistence version="1.0" xmlns="http://java.sun.com/xml/ns/persistence">
    <persistence-unit name="jpaTutos" transaction-type="RESOURCE_LOCAL">
        <provider>org.hibernate.ejb.HibernatePersistence</provider>
         <class>com.myshop.domain.plate.Plat</class>
        <properties>
                <property name="hibernate.connection.driver_class" value="com.mysql.jdbc.Driver" />
                <property name="hibernate.connection.url" value="jdbc:mysql://localhost:3306/restaurant" />
                <property name="hibernate.connection.username" value="root" />
                <property name="show_sql" value="true" />
        		<property name="dialect" value="org.hibernate.dialect.MySQLDialect" />
        </properties>
 
    </persistence-unit>
 
</persistence>

[promachos]

Autrement dit, tu dois être en train de vouloir enregistrer une entité détachée du gestionnaire de persistence. Il te faudrait plutôt la réattacher en faisant un merge, et non un persist

jai refait le test en jpaTemplate.merge() à la place de persit
les données ne sont pas insérés en base de donnée ...
Comment insérer mon en base ?

[MaitreKaio]

Explique nous ton scénario stp.
Tu as une IHM dans laquelle tu crées un nouveau plat, tu modifies un plat existant, ... ?

[promachos]

jai un formualire pour créer un objet plat que je souhaite ensuite insérer en Base :

Presentation => Controller=>Service=>DAO


Probleme ca explose dans ma couche DAO je comprends pas pourquoi ??
Quelq'un peut maider ?

public void persist(T t) {
jpaTemplate.persist(t);
}

Code :

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<form:form modelAttribute="plat" action="plat" method="post">
              <fieldset>        
                <legend>Plat Fields</legend>
                <p>
                    <form:label    for="NomPlat" path="NomPlat" cssErrorClass="error">Nom du plat</form:label><br/>
                    <form:input path="NomPlat" /> <form:errors path="NomPlat" />            
                </p>
                <p>    
                    <form:label for="Description" path="Description" cssErrorClass="error">Description </form:label><br/>
                    <form:input path="Description" /> <form:errors path="Description" />
                </p>
                <p>
                    <form:label for="Type" path="Type" cssErrorClass="error">Type </form:label><br/>
                    <form:input path="Type" /> <form:errors path="Type" />
                </p>
 
                <p>    
                    <input type="submit" />
                </p>
            </fieldset>
        </form:form>

je recuperre ces données dans mon Controller :

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package com.myshop.controller.plate;
 
import java.util.Map;
import java.util.concurrent.ConcurrentHashMap;
 
import javax.validation.Valid;
 
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.validation.BindingResult;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
 
import com.myshop.controller.account.ResourceNotFoundException;
import com.myshop.service.plate.IPlateService;
 
@Controller
@RequestMapping(value="/plat")
public class PlatController {
 
	private Map<Integer, Plat> plats = new ConcurrentHashMap<Integer, Plat>();
 
	@Autowired
	@Qualifier("platService")
	private IPlateService mPlatService;
 
 
	@RequestMapping(method=RequestMethod.GET)
	public String getCreateForm(Model model) {
		model.addAttribute(new Plat());
		return "plat/createForm";
	}
 
	@RequestMapping(method=RequestMethod.POST)
	public String create(@Valid com.myshop.domain.plate.Plat plat, BindingResult result) {
		if (result.hasErrors()) {
			return "plat/createForm";
		}
 
		this.plats.put(plat.assignId(), plat);
		mPlatService.persist(plat);
		return "redirect:/plat/" + plat.getId();
	}
 
	@RequestMapping(value="{id}", method=RequestMethod.GET)
	public String getView(@PathVariable Long id, Model model) {
		Plat plat = this.plats.get(id);
		if (plat == null) {
			throw new ResourceNotFoundException(id);
		}
		model.addAttribute(plat);
		return "plat/view";
	}
 
}

Couche Service

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@Service("platService")
@Transactional(propagation = Propagation.REQUIRED, readOnly = true)
public class PlatService implements IPlateService{
 
 
	@Autowired
	private IPlatHome mPlatDao;
 
	public Plat findById(Integer id) {
		return mPlatDao.findById(id);
	}
 
	public Plat merge(Plat detachedInstance) {
		return mPlatDao.merge(detachedInstance);
	}
 
	public void persist(Plat transientInstance) {
		mPlatDao.persist(transientInstance);
	}
 
	public void remove(Plat persistentInstance) {
		mPlatDao.remove(persistentInstance);
	}
 
}

couche DAO

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public abstract class AbstractDAO<T>  {
        
        private Class<T> entityClass;
        
        protected JpaTemplate jpaTemplate;

        protected Class<T> getEntityClass() {
                return entityClass;
        }
        
        @PersistenceUnit
        public void setEntityManagerFactory(EntityManagerFactory emf) {
                this.jpaTemplate = new JpaTemplate(emf);
        }

        @SuppressWarnings("unchecked")
        public AbstractDAO(Class<T> entityClass) {
                this.entityClass = entityClass;
        }
        
     

        @SuppressWarnings("unchecked")
        public Collection<T> getAll() {
                return jpaTemplate.find("from " + entityClass.getSimpleName());
        }

        public void persist(T t) {
    		jpaTemplate.persist(t);
    	}
        
        public T getById(Long id) {
                return jpaTemplate.find(entityClass, id);
        }
        
        public void remove(T t) {
                jpaTemplate.remove(t);          
        }
}

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@Repository
public class PlatHome extends AbstractDAO<Plat> implements IPlatHome {
 
	private static final Log log = LogFactory.getLog(PlatHome.class);
 
 
	public PlatHome(){
		super(Plat.class);
	}
}

[Aure7780]

Désolé de déterrer le sujet, mais j'ai exactement le même problème !
Comme je vois "sujet résolu" mais sans réponse, quelqu'un aurait-il l’amabilité de m'éclaircir sur la réponse ?

Merci d'avance.