Tutoriel pour implémenter le patron de conception MVP dans une application web avec Spring, GWT et Hibernate

package com.developpez.bnguimgo.gwt.client.activity;

import java.util.logging.Logger;

public class WelcomeActivity extends AbstractActivity implements IWelcomeView.Presenter {

    private static Logger logger = Logger.getLogger(WelcomeActivity.class.getName());
    private static IWelcomeView welcomeView;
    private ClientFactory clientFactory;
    private IUserServiceRpcAsync userService = GWT.create(IUserServiceRpc.class) ;
    
    public WelcomeActivity() {
        super();
    }
    
    public WelcomeActivity(ClientFactory clientFactory){
        this.clientFactory = clientFactory;//initialisation de la factory
    }
    
    @Override
    public void start(AcceptsOneWidget panel, EventBus eventBus) {
        logger.info("Démarrage de "+ WelcomeActivity.class.getName());
        welcomeView = clientFactory.getWelcomeView();
        welcomeView.setPresenter(this);
        panel.setWidget(welcomeView.asWidget());        
    }

    @Override
    public void goToCreateComptePlace(String token) {
        // TODO Auto-generated method stub
        
    }

    @Override
    public void findUserByEmail(String email, String password) {
        userService.findUserByEmailAndPassword(email, password, new AsyncCallback<UserDTO>(){

            @Override
            public void onSuccess(UserDTO userDTO) {
                
                if(null != userDTO){
                    GWT.log("WelcomeActivity, find user success, goTo UserDetailsPlace: "+userDTO.toString());
                    if(userDTO.getUserType().equalsIgnoreCase(UserType.ETUDIANT.name())){
                        welcomeView.showSucces("Interface étudiant en construction : "+userDTO.getUserType());
//                        clientFactory.goTo(new StudentPlace("STUDENT"));
                    } else if(userDTO.getUserType().equalsIgnoreCase(UserType.ENSEIGNANT.name())){
                        welcomeView.showSucces("Interface enseignant en construction : "+userDTO.getUserType());
//                        clientFactory.goTo(new StudentPlace("STUDENT")); //à Modifier quand EnseignantPlace sera construit
                    } else if(userDTO.getUserType().equalsIgnoreCase("ADMIN")){
                        welcomeView.showSucces("Interface admin en construction : "+userDTO.getUserType());
//                        clientFactory.goTo(new AdminPlace("ADMIN"));
                    }else {
                        welcomeView.showError("Erreur technique pour ce compte : "+userDTO.getUserType());
                    }
                }else{
                    welcomeView.showError("Merci de vérifier votre Login et Mot de Passe");
                }
            }
            
            @Override
            public void onFailure(Throwable caught) {
                welcomeView.showError("Erreur technique pour ce compte : "+caught.getMessage());
            }            
        });        
    }
}

package com.developpez.bnguimgo.gwt.shared.enumeration;

public enum UserType {
    ETUDIANT, 
    ENSEIGNANT, 
    ADMIN, 
    VISITEUR;
}

package com.developpez.bnguimgo.gwt.server.rpc;

//Remarque pas de extends RemoteServiceServlet ici, car fourni par le plugin spring4gwt
@Service("userServiceRpc")
public class UserRpcServiceImpl implements IUserServiceRpc{

    @Autowired
    private IUserService userService;
    
    @Override
    public UserDTO findUserByEmailAndPassword(String email, String password) throws Exception {
        return userService.findUserByEmailAndPassword(email, password);        
    }
}

package com.developpez.bnguimgo.service;

public interface IUserService {

UserDTO findUserByEmailAndPassword(String email, String password) throws Exception;
}

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">

    <modelVersion>4.0.0</modelVersion>
    <groupId>com.developpez.bnguimgo</groupId>
    <artifactId>gwtSpringHibernate</artifactId>
    <packaging>war</packaging>
    <version>1.0.0-SNAPSHOT</version>
    <name>GWT MVP Tutorial</name>
    <properties>
        <gwtVersion>2.7.0</gwtVersion>
        <springframeworkVersion>4.2.4.RELEASE</springframeworkVersion>
        <hibernateVersion>5.0.1.Final</hibernateVersion>
        <webappDirectory>${project.build.directory}/${project.build.finalName}</webappDirectory>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
    </properties>
    <dependencies>    
        <dependency>
            <groupId>com.google.gwt</groupId>
            <artifactId>gwt-servlet</artifactId>
            <version>${gwtVersion}</version>
            <scope>runtime</scope>
        </dependency>
        <dependency>
            <groupId>com.google.gwt</groupId>
            <artifactId>gwt-user</artifactId>
            <version>${gwtVersion}</version>
            <scope>provided</scope>
        </dependency>
        
<!-- Nécessaire pour le superDevMode -->        
         <dependency>
          <groupId>com.google.gwt</groupId>
          <artifactId>gwt-codeserver</artifactId>
          <version>${gwtVersion}</version>
        </dependency>
        <dependency>
          <groupId>com.google.gwt</groupId>
          <artifactId>gwt-dev</artifactId>
          <version>${gwtVersion}</version>
        </dependency>     
        <dependency>
            <groupId>com.github.gwtbootstrap</groupId>
            <artifactId>gwt-bootstrap</artifactId>
            <version>2.3.2.0</version>        
        </dependency>    
            
<!-- nécessaire pour la servlet ou service RPC: spring4gwt -->
        <dependency>
            <groupId>com.google.code</groupId>
            <artifactId>spring4gwt</artifactId> 
            <version>0.0.1</version>
        <!-- install or activate the lines below -->            
        <!--         <scope>system</scope> -->
        <!--         <systemPath>${basedir}/src/main/webapp/WEB-INF/lib/spring4gwt-0.0.1.jar</systemPath> -->
        </dependency>
                    
<!-- Guava pour la gestion des collections -->        
        <dependency>
            <groupId>com.google.guava</groupId>
            <artifactId>guava</artifactId>
            <version>19.0</version>
        </dependency>        

<!-- Spring framework distribution -->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-core</artifactId>
            <version>${springframeworkVersion}</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-beans</artifactId>
            <version>${springframeworkVersion}</version>            
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-context</artifactId>
            <version>${springframeworkVersion}</version>            
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-tx</artifactId>
            <version>${springframeworkVersion}</version>            
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-web</artifactId>
            <version>${springframeworkVersion}</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-orm</artifactId>
            <version>${springframeworkVersion}</version>            
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-aspects</artifactId>
            <version>${springframeworkVersion}</version>            
        </dependency>        
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-webmvc</artifactId>
            <version>${springframeworkVersion}</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-test</artifactId>
            <version>${springframeworkVersion}</version>            
        </dependency>
        <dependency>
            <groupId>org.aspectj</groupId>
            <artifactId>aspectjtools</artifactId>
            <version>1.8.7</version>
        </dependency>
        
<!-- AOP dependency -->
       <dependency>
        <groupId>cglib</groupId>
        <artifactId>cglib</artifactId>
        <version>3.1</version>
         <exclusions>
              <exclusion>
                  <groupId>asm</groupId>
                  <artifactId>asm</artifactId>
              </exclusion>
          </exclusions>     
       </dependency>
        <dependency>
            <groupId>antlr</groupId>
            <artifactId>antlr</artifactId>
            <version>2.7.7</version>
        </dependency>

<!-- Hibernate ORM -->
        <dependency>
            <groupId>org.hibernate.javax.persistence</groupId>
            <artifactId>hibernate-jpa-2.1-api</artifactId>
            <version>1.0.0.Final</version>
        </dependency>
        <dependency>
            <groupId>org.hibernate</groupId>
            <artifactId>hibernate-entitymanager</artifactId>
            <version>${hibernateVersion}</version>
        </dependency>
        <dependency>
            <groupId>org.hibernate</groupId>
            <artifactId>hibernate-core</artifactId>
            <version>${hibernateVersion}</version>
        </dependency>
        <dependency>
            <groupId>org.hibernate</groupId>
            <artifactId>hibernate-validator</artifactId>
            <version>${hibernateVersion}</version>
        </dependency>
        <dependency>
            <groupId>org.hibernate.common</groupId>
            <artifactId>hibernate-commons-annotations</artifactId>
            <version>${hibernateVersion}</version>
        </dependency>        
        <dependency>
            <groupId>com.fasterxml</groupId>
            <artifactId>classmate</artifactId>
            <version>1.2.0</version>
        </dependency>
        
        <dependency>
            <groupId>javax.transaction</groupId>
            <artifactId>jta</artifactId>
            <version>1.1</version>
        </dependency>
        <dependency>
            <groupId>dom4j</groupId>
            <artifactId>dom4j</artifactId>
            <version>1.6.1</version>
        </dependency>        
        <dependency>
            <groupId>org.javassist</groupId>
            <artifactId>javassist</artifactId>
            <version>3.20.0-GA</version>
        </dependency>
        <dependency>
            <groupId>javax.validation</groupId>
            <artifactId>validation-api</artifactId>
            <version>1.1.0.Final</version>
        </dependency>
        <dependency>
            <groupId>javax.el</groupId>
            <artifactId>javax.el-api</artifactId>
            <version>3.0.1-b04</version>
        </dependency>

<!-- joda-time for manage local datetime -->
        <dependency>
            <groupId>joda-time</groupId>
            <artifactId>joda-time</artifactId>
            <version>2.9.1</version>
        </dependency>
        
        <dependency>
            <groupId>c3p0</groupId>
            <artifactId>c3p0</artifactId>
            <version>0.9.1.2</version>
        </dependency>

<!-- Databases Config -->
        <dependency>
            <groupId>com.h2database</groupId>
            <artifactId>h2</artifactId>
            <version>1.3.168</version>
        </dependency>

<!-- Apache commons-logging -->
        <dependency>
            <groupId>commons-logging</groupId>
            <artifactId>commons-logging</artifactId>
            <version>1.1.1</version>
        </dependency>
        <dependency>
            <groupId>org.apache.commons</groupId>
            <artifactId>commons-lang3</artifactId>
            <version>3.4</version>
        </dependency>        
        
<!-- SLF4J pour la gestion des logs -->
        <dependency>
            <groupId>org.slf4j</groupId>
            <artifactId>slf4j-log4j12</artifactId>
            <version>1.7.5</version>
        </dependency>
                
<!-- Test -->
        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <version>4.7</version>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>org.ow2.asm</groupId>
            <artifactId>asm</artifactId>
            <version>5.0.4</version>
        </dependency>

<!-- Dependance pour le mapper Dozer nécessaire à la création des DTOs -->
        <dependency>
            <groupId>net.sf.dozer</groupId>
            <artifactId>dozer</artifactId>
            <version>5.5.1</version>
        </dependency>
        <dependency>
            <groupId>commons-beanutils</groupId>
            <artifactId>commons-beanutils</artifactId> <!-- nécessaire pour faire fonctionner le Dozer -->
            <version>1.9.2</version>
        </dependency>    
    </dependencies>

    <build>
        <!-- Generate compiled stuff in the folder used for developing mode -->
        <outputDirectory>${webappDirectory}/WEB-INF/classes</outputDirectory>
        <plugins>
            <!-- GWT Maven Plugin -->
            <plugin>
                <groupId>org.codehaus.mojo</groupId>
                <artifactId>gwt-maven-plugin</artifactId>
                <version>${gwtVersion}</version>
                <dependencies>
                <dependency>
                    <groupId>org.codehaus.plexus</groupId>
                    <artifactId>plexus-utils</artifactId>
                    <version>3.0.22</version>
                </dependency>
                <dependency>
                    <groupId>org.codehaus.plexus</groupId>
                    <artifactId>plexus-compiler-api</artifactId>
                    <version>1.6</version>
                </dependency>
                <dependency>
                    <groupId>commons-io</groupId>
                    <artifactId>commons-io</artifactId>
                    <version>2.4</version>
                </dependency>
                </dependencies>    
            </plugin>
        
        <!-- Copy static web files before executing gwt:run -->
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-war-plugin</artifactId>
                    <version>2.1.1</version>
                <configuration>
                    <webappDirectory>${webappDirectory}</webappDirectory>
                </configuration>
            </plugin>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-compiler-plugin</artifactId>
                <version>2.3.2</version>
                <configuration>
                    <source>1.7</source>
                    <target>1.7</target>
                </configuration>
            </plugin>
        </plugins>
    </build>
</project>

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE web-app
    PUBLIC "-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN"
    "http://java.sun.com/dtd/web-app_2_3.dtd">

<web-app>

 <listener>
     <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
 </listener>
 
       <context-param>
        <param-name>contextConfigLocation</param-name>
        <param-value>classpath:spring/applicationContext.xml</param-value>
    </context-param>

<!-- SpringGwt remote service servlet -->
 <servlet>
     <servlet-name>springGwtRemoteServiceServlet</servlet-name>
     <servlet-class>org.spring4gwt.server.SpringGwtRemoteServiceServlet</servlet-class>
     <load-on-startup>1</load-on-startup>
 </servlet>
 <servlet-mapping>
 <servlet-name>springGwtRemoteServiceServlet</servlet-name>
    <url-pattern>/BookManager/rpc/*</url-pattern>
  </servlet-mapping>

  <!-- Default page to serve -->
  <welcome-file-list>
    <welcome-file>BookManager.html</welcome-file>
  </welcome-file-list>
</web-app>

<beans xmlns="http://www.springframework.org/schema/beans"
 xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:p="http://www.springframework.org/schema/p"
 xmlns:aop="http://www.springframework.org/schema/aop" xmlns:context="http://www.springframework.org/schema/context"
 xmlns:tx="http://www.springframework.org/schema/tx"
 xsi:schemaLocation="
 http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-4.1.xsd
 http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-4.1.xsd
 http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.1.xsd
 http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-4.1.xsd">
 
    <context:annotation-config />
    <tx:annotation-driven />
    <context:component-scan base-package="com.developpez.bnguimgo" />
    <bean id="entityManagerFactory" class="org.springframework.orm.jpa.LocalEntityManagerFactoryBean">
         <property name="persistenceUnitName" value="entityManagerUnit" />
     </bean>
    <bean id="transactionManager" class="org.springframework.orm.jpa.JpaTransactionManager" >
         <property name="entityManagerFactory" ref="entityManagerFactory" />
     </bean>
     
     <bean class="org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor"/>
    <bean class="org.springframework.context.annotation.CommonAnnotationBeanPostProcessor" />
    <bean class="org.springframework.dao.annotation.PersistenceExceptionTranslationPostProcessor" />
        
    <!-- Bean de mapping pour les DTOs --> 
    <bean id="org.dozer.mapper" class="org.dozer.DozerBeanMapper">
          <property name="mappingFiles">
            <list>
                <value>dozer-mapping.xml</value>
             </list>
          </property>
    </bean>     
</beans>

package com.developpez.bnguimgo.dao;
/**
 * @param <E> entité générique qui doit être spécifiée lors de l'utilisation concrète
 * @param <PK> Clé générique, le type doit être spécifié lors de l'usage
 */
public interface IGenericDAO<E, PK extends Serializable> {

    /**
     * Cherche un User par email et password
     * @param email : Email du User
     * @param password : mot de passe du User
     * @return E : Renvoie un User
     */
    E findUserByEmailAndPassword(String email, String password);

}

package com.developpez.bnguimgo.dao.impl;

@Repository("genericDAO")
public abstract class GenericDAOImpl<E, PK extends Serializable> implements IGenericDAO<E, PK> {

@Transient
protected Class<E> entityClass;
     
public GenericDAOImpl() {
    super();
}

public GenericDAOImpl(Class<E> entityClass) {
    this.entityClass = entityClass;
}
    
public Class<E> getEntityClass() {
    return entityClass;
}

public void setEntityClass(Class<E> entityClass) {
    this.entityClass = entityClass;
}
    
@Override
public E findUserByEmailAndPassword(String email, String password ) {

String queryString = "SELECT user FROM " + entityClass.getName() + " user WHERE user.mail LIKE :emailParam AND user.password LIKE :passwordParam";
TypedQuery<E> typedQuery = getEntityManager().createQuery(queryString, entityClass);
typedQuery.setParameter("emailParam", email);
typedQuery.setParameter("passwordParam", password);
List<E> resultList = typedQuery.getResultList();
if(resultList !=null && !resultList.isEmpty()){
return resultList.get(0);
}
return null;
}
    
/**
* Permet d'obtenir le EntityManager pour les requêtes en base de données
* @return EntityManager : Instance de EntityManager pour les requêtes en base de données
 */
protected abstract EntityManager getEntityManager();

}

package com.developpez.bnguimgo.dao;

public interface IUserDAO extends IGenericDAO<User, Long> {
    //Grâce à l'héritage, pas besoin d'une méthode dans cette interface
    //Seules les méthodes propres à un User peuvent être ajoutées ici
}

package com.developpez.bnguimgo.dao.impl;

@Repository("userDAO")
public class UserDAOImpl extends GenericDAOImpl<User, Long> implements IUserDAO{

    @PersistenceContext(unitName = "entityManagerUnit")
    protected EntityManager entityManager;

    public UserDAOImpl() {
        super(User.class); //Très important sinon, NullPointerException
    }

    public UserDAOImpl(Class<User> entityClass) {
        super(entityClass);
    }

    @Override
    protected EntityManager getEntityManager() {
        return entityManager;
    }    
}

package com.developpez.bnguimgo.mapper;

public final class DTOMapper {
    
    public static UserDTO mapToUserDTO(User user){
        if(user !=null){
        return new UserDTO(user.getId(), user.getMail(), user.getPassword(), user.getUserType());
        }
        return null;
    }        
}

<?xml version="1.0" encoding="UTF-8"?>
<mappings xmlns="http://dozer.sourceforge.net"
          xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
          xsi:schemaLocation="http://dozer.sourceforge.net
          http://dozer.sourceforge.net/schema/beanmapping.xsd">
   <mapping>
      <class-a>com.developpez.bnguimgo.entities.User</class-a>
      <class-b>com.developpez.bnguimgo.dto.UserDTO</class-b>     
   </mapping>   
</mappings>

package com.developpez.bnguimgo.service.impl;

@Service("userService")
public class UserServiceImpl implements IUserService {

    private static final Logger LOG = LoggerFactory.getLogger(UserServiceImpl.class);    
    @Autowired
    private IUserDAO userDAO;
    @Autowired
    private Mapper dozerMapper;
    
    public UserServiceImpl(){
        super();
    }
    @Override
    public UserDTO findUserByEmailAndPassword(String email, String password) throws Exception {
        User user = null;
        try {
            user = userDAO.findUserByEmailAndPassword(email, password);
        if(null != user){
            LOG.info("User found: {} ", user.toString());
            //mapper manuel à commenter si utilisation de dozer
            UserDTO userDTO = DTOMapper.mapToUserDTO(user);
            //mapper dozer fourni par spring
//            UserDTO userDTO = dozerMapper.map(userDTO, UserDTO.class);
            return userDTO;
        } else{
            LOG.error("Failed to find user with email ={} and paswword = {} ", email, password);
            return null;
        }
        } catch(Exception e) {
            LOG.error("Failed to find user with email ={} and paswword = {} ", email, password);
            LOG.error("Failed to find user Or Update: ",e);
            throw e;
        }
    }    
}

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE log4j:configuration SYSTEM "log4j.dtd">
<log4j:configuration xmlns:log4j="http://jakarta.apache.org/log4j/" debug="true">

    <!-- levels : all|debug|info|warn|error|fatal|off|trace -->

    <appender name="console" class="org.apache.log4j.ConsoleAppender">
        <layout class="org.apache.log4j.PatternLayout">
            <param name="ConversionPattern"
                value="%X{codeapp} %d{yyyy-MM-dd HH:mm:ss} %-5p [%c{1}] : %m%n" />
        </layout>
    </appender>

    <appender name="file-out" class="org.apache.log4j.RollingFileAppender">
        <param name="file" value="gwtmvpproject.log" />
        <param name="append" value="true" />
        <param name="MaxFileSize" value="10MB" />
        <param name="MaxBackupIndex" value="10" />
        <layout class="org.apache.log4j.PatternLayout">
            <param name="ConversionPattern"
                value="[%X{idreq} %X{iduser} %X{codeenv}] %d{yyyy-MM-dd HH:mm:ss} %-5p [%c{1}] : %m%n" />
        </layout>
    </appender>

     <logger name="org.springframework.web.context" additivity="false">  
        <level value="INFO" />  
        <appender-ref ref="console" />  
     </logger>
     
    <logger name="com.developpez.bnguimgo" additivity="false">
        <level value="INFO" />
        <appender-ref ref="console" />
        <appender-ref ref="file-out" />
    </logger>

    <root>
        <priority value="info" />
        <appender-ref ref="console" />
        <appender-ref ref="file-out" />
    </root>    
</log4j:configuration>