GWT 2 Spring 3 JPA 2 Hibernate 3.5 – Eclipse и Maven 2

      
mvn archetype:generate \ 
-DarchetypeGroupId=org.codehaus.mojo \ 
-DarchetypeArtifactId=gwt-maven-plugin \ 
-DgroupId=com.javacodegeeks \ 
-DartifactId=gwtspring
		

      
<listener>
 <listener-class>
  org.springframework.web.context.ContextLoaderListener
 </listener-class>
</listener>
<servlet>
 <servlet-name>springGwtRemoteServiceServlet</servlet-name>
 <servlet-class>org.spring4gwt.server.SpringGwtRemoteServiceServlet
 </servlet-class>
</servlet>
<servlet-mapping>
 <servlet-name>springGwtRemoteServiceServlet</servlet-name>
 <url-pattern>/com.javacodegeeks.gwtspring.Application/springGwtServices/*</url-pattern>
</servlet-mapping>
		

      
<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="MyPersistenceUnit" transaction-type="RESOURCE_LOCAL">
  <provider>org.hibernate.ejb.HibernatePersistence</provider>

  <properties>
   <property name="hibernate.hbm2ddl.auto" value="update" />
   <property name="hibernate.show_sql" value="false" />
   <property name="hibernate.dialect" value="org.hibernate.dialect.HSQLDialect" />
   <property name="hibernate.connection.driver_class" value="org.hsqldb.jdbcDriver" />
   <property name="hibernate.connection.url" value="jdbc:hsqldb:mem:javacodegeeks" />
   <property name="hibernate.connection.username" value="sa" />
   <property name="hibernate.connection.password" value="" />

   <property name="hibernate.c3p0.min_size" value="5" />
   <property name="hibernate.c3p0.max_size" value="20" />
   <property name="hibernate.c3p0.timeout" value="300" />
   <property name="hibernate.c3p0.max_statements" value="50" />
   <property name="hibernate.c3p0.idle_test_period" value="3000" />

  </properties>

 </persistence-unit>

</persistence>
		

      
<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:jee="http://www.springframework.org/schema/jee" xmlns:tx="http://www.springframework.org/schema/tx"
 xmlns:task="http://www.springframework.org/schema/task"
 xsi:schemaLocation="
   http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-3.0.xsd
   http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
   http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.0.xsd
   http://www.springframework.org/schema/jee http://www.springframework.org/schema/jee/spring-jee-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/task http://www.springframework.org/schema/task/spring-task-3.0.xsd">

 <context:component-scan base-package="com.javacodegeeks.gwtspring" />

 <tx:annotation-driven />

 <bean id="entityManagerFactory" class="org.springframework.orm.jpa.LocalEntityManagerFactoryBean">
  <property name="persistenceUnitName" value="MyPersistenceUnit" />
 </bean>

 <bean id="transactionManager" class="org.springframework.orm.jpa.JpaTransactionManager">
  <property name="entityManagerFactory" ref="entityManagerFactory" />
 </bean>

</beans>
		

      
package com.javacodegeeks.gwtspring.shared.dto;

import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.Id;
import javax.persistence.Table;

@Entity
@Table(name = "EMPLOYEE")
public class EmployeeDTO implements java.io.Serializable {

 private static final long serialVersionUID = 7440297955003302414L;

 @Id
 @Column(name="employee_id")
 private long employeeId;

 @Column(name="employee_name", nullable = false, length=30)
 private String employeeName;

 @Column(name="employee_surname", nullable = false, length=30)
 private String employeeSurname;

 @Column(name="job", length=50)
 private String job;
  
 public EmployeeDTO() {
 }

 public EmployeeDTO(int employeeId) {
  this.employeeId = employeeId;  
 }

 public EmployeeDTO(long employeeId, String employeeName, String employeeSurname,
   String job) {
  this.employeeId = employeeId;
  this.employeeName = employeeName;
  this.employeeSurname = employeeSurname;
  this.job = job;
 }

 public long getEmployeeId() {
  return employeeId;
 }

 public void setEmployeeId(long employeeId) {
  this.employeeId = employeeId;
 }

 public String getEmployeeName() {
  return employeeName;
 }

 public void setEmployeeName(String employeeName) {
  this.employeeName = employeeName;
 }

 public String getEmployeeSurname() {
  return employeeSurname;
 }

 public void setEmployeeSurname(String employeeSurname) {
  this.employeeSurname = employeeSurname;
 }

 public String getJob() {
  return job;
 }

 public void setJob(String job) {
  this.job = job;
 }

}
		

      
<!-- Specify the paths for translatable code -->
<source path='client'/>
<source path='shared'/>
		

      
package com.javacodegeeks.gwtspring.server.dao;

import javax.annotation.PostConstruct;
import javax.persistence.EntityManagerFactory;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Repository;

import com.javacodegeeks.gwtspring.shared.dto.EmployeeDTO;


@Repository("employeeDAO")
public class EmployeeDAO extends JpaDAO<Long, EmployeeDTO> {

 @Autowired
 EntityManagerFactory entityManagerFactory;

 @PostConstruct
 public void init() {
  super.setEntityManagerFactory(entityManagerFactory);
 }

}
		

      
package com.javacodegeeks.gwtspring.server.dao; 

import java.lang.reflect.ParameterizedType; 
import java.util.List; 

import javax.persistence.EntityManager; 
import javax.persistence.PersistenceException; 
import javax.persistence.Query; 

import org.springframework.orm.jpa.JpaCallback; 
import org.springframework.orm.jpa.support.JpaDaoSupport; 

public abstract class JpaDAO<K, E> extends JpaDaoSupport { 
 protected Class<E> entityClass; 

 @SuppressWarnings("unchecked") 
 public JpaDAO() { 
  ParameterizedType genericSuperclass = (ParameterizedType) getClass() 
    .getGenericSuperclass(); 
  this.entityClass = (Class<E>) genericSuperclass 
    .getActualTypeArguments()[1]; 
 } 

 public void persist(E entity) { 
  getJpaTemplate().persist(entity); 
 } 

 public void remove(E entity) { 
  getJpaTemplate().remove(entity); 
 } 
  
 public E merge(E entity) { 
  return getJpaTemplate().merge(entity); 
 } 
  
 public void refresh(E entity) { 
  getJpaTemplate().refresh(entity); 
 } 

 public E findById(K id) { 
  return getJpaTemplate().find(entityClass, id); 
 } 
  
 public E flush(E entity) { 
  getJpaTemplate().flush(); 
  return entity; 
 } 
  
 @SuppressWarnings("unchecked") 
 public List<E> findAll() { 
  Object res = getJpaTemplate().execute(new JpaCallback() { 

   public Object doInJpa(EntityManager em) throws PersistenceException { 
    Query q = em.createQuery("SELECT h FROM " + 
      entityClass.getName() + " h"); 
    return q.getResultList(); 
   } 
    
  }); 
   
  return (List<E>) res; 
 } 

 @SuppressWarnings("unchecked") 
 public Integer removeAll() { 
  return (Integer) getJpaTemplate().execute(new JpaCallback() { 

   public Object doInJpa(EntityManager em) throws PersistenceException { 
    Query q = em.createQuery("DELETE FROM " + 
      entityClass.getName() + " h"); 
    return q.executeUpdate(); 
   } 
    
  }); 
 } 
  
}
		

      
package com.javacodegeeks.gwtspring.shared.services;

import com.google.gwt.user.client.rpc.RemoteService;
import com.google.gwt.user.client.rpc.RemoteServiceRelativePath;

import com.javacodegeeks.gwtspring.shared.dto.EmployeeDTO;

@RemoteServiceRelativePath("springGwtServices/employeeService")
public interface EmployeeService extends RemoteService {

 public EmployeeDTO findEmployee(long employeeId);
 public void saveEmployee(long employeeId, String name, String surname, String jobDescription) throws Exception;
 public void updateEmployee(long employeeId, String name, String surname, String jobDescription) throws Exception;
 public void saveOrUpdateEmployee(long employeeId, String name, String surname, String jobDescription) throws Exception;
 public void deleteEmployee(long employeeId) throws Exception;

}
		

      
package com.javacodegeeks.gwtspring.server.services; 

import javax.annotation.PostConstruct; 
import javax.annotation.PreDestroy; 

import org.springframework.beans.factory.annotation.Autowired; 
import org.springframework.stereotype.Service; 
import org.springframework.transaction.annotation.Propagation; 
import org.springframework.transaction.annotation.Transactional; 

import com.javacodegeeks.gwtspring.server.dao.EmployeeDAO; 
import com.javacodegeeks.gwtspring.shared.dto.EmployeeDTO; 
import com.javacodegeeks.gwtspring.shared.services.EmployeeService; 

@Service("employeeService") 
public class EmployeeServiceImpl implements EmployeeService { 
  
 @Autowired 
 private EmployeeDAO employeeDAO; 

 @PostConstruct 
 public void init() throws Exception { 
 } 
  
 @PreDestroy 
 public void destroy() { 
 } 

 public EmployeeDTO findEmployee(long employeeId) { 
   
  return employeeDAO.findById(employeeId); 
   
 } 
  
 @Transactional(propagation=Propagation.REQUIRED, rollbackFor=Exception.class) 
 public void saveEmployee(long employeeId, String name, String surname, String jobDescription) throws Exception { 
    
  EmployeeDTO employeeDTO = employeeDAO.findById(employeeId); 
   
  if(employeeDTO == null) { 
   employeeDTO = new EmployeeDTO(employeeId, name,surname, jobDescription); 
   employeeDAO.persist(employeeDTO); 
  } 
   
 } 
  
 @Transactional(propagation=Propagation.REQUIRED, rollbackFor=Exception.class) 
 public void updateEmployee(long employeeId, String name, String surname, String jobDescription) throws Exception { 
   
  EmployeeDTO employeeDTO = employeeDAO.findById(employeeId); 
   
  if(employeeDTO != null) { 
   employeeDTO.setEmployeeName(name); 
   employeeDTO.setEmployeeSurname(surname); 
   employeeDTO.setJob(jobDescription); 
  } 

 } 
  
 @Transactional(propagation=Propagation.REQUIRED, rollbackFor=Exception.class) 
 public void deleteEmployee(long employeeId) throws Exception { 
   
  EmployeeDTO employeeDTO = employeeDAO.findById(employeeId); 
   
  if(employeeDTO != null) 
   employeeDAO.remove(employeeDTO); 

 } 
  
 @Transactional(propagation=Propagation.REQUIRED, rollbackFor=Exception.class) 
 public void saveOrUpdateEmployee(long employeeId, String name, String surname, String jobDescription) throws Exception { 
   
  EmployeeDTO employeeDTO = new EmployeeDTO(employeeId, name,surname, jobDescription); 
   
  employeeDAO.merge(employeeDTO); 
   
 } 

}
		

      
package com.javacodegeeks.gwtspring.client;

import com.google.gwt.core.client.EntryPoint;
import com.google.gwt.event.dom.client.ClickEvent;
import com.google.gwt.event.dom.client.ClickHandler;
import com.google.gwt.event.dom.client.KeyCodes;
import com.google.gwt.event.dom.client.KeyUpEvent;
import com.google.gwt.event.dom.client.KeyUpHandler;
import com.google.gwt.user.client.rpc.AsyncCallback;
import com.google.gwt.user.client.ui.Button;
import com.google.gwt.user.client.ui.DialogBox;
import com.google.gwt.user.client.ui.HTML;
import com.google.gwt.user.client.ui.Label;
import com.google.gwt.user.client.ui.RootPanel;
import com.google.gwt.user.client.ui.TextBox;
import com.google.gwt.user.client.ui.VerticalPanel;
import com.javacodegeeks.gwtspring.shared.dto.EmployeeDTO;
import com.javacodegeeks.gwtspring.shared.services.EmployeeServiceAsync;


/**
 * Entry point classes define <code>onModuleLoad()</code>.
 */
public class Application
    implements EntryPoint
{

 /**
  * The message displayed to the user when the server cannot be reached or
  * returns an error.
  */
 private static final String SERVER_ERROR = "An error occurred while "
   + "attempting to contact the server. Please check your network "
   + "connection and try again. The error is : ";

 /**
  * Create a remote service proxy to talk to the server-side Employee service.
  */
 private final EmployeeServiceAsync employeeService = EmployeeServiceAsync.Util.getInstance();

 /**
  * This is the entry point method.
  */
 public void onModuleLoad() {
  final Button saveOrUpdateButton = new Button("SaveOrUpdate");
  final Button retrieveButton = new Button("Retrieve");
  final TextBox employeeInfoField = new TextBox();
  employeeInfoField.setText("Employee Info");
  final TextBox employeeIdField = new TextBox();
  final Label errorLabel = new Label();

  // We can add style names to widgets
  saveOrUpdateButton.addStyleName("sendButton");
  retrieveButton.addStyleName("sendButton");

  // Add the nameField and sendButton to the RootPanel
  // Use RootPanel.get() to get the entire body element
  RootPanel.get("employeeInfoFieldContainer").add(employeeInfoField);
  RootPanel.get("updateEmployeeButtonContainer").add(saveOrUpdateButton);
  RootPanel.get("employeeIdFieldContainer").add(employeeIdField);
  RootPanel.get("retrieveEmployeeButtonContainer").add(retrieveButton);
  RootPanel.get("errorLabelContainer").add(errorLabel);

  // Focus the cursor on the name field when the app loads
  employeeInfoField.setFocus(true);
  employeeInfoField.selectAll();

  // Create the popup dialog box
  final DialogBox dialogBox = new DialogBox();
  dialogBox.setText("Remote Procedure Call");
  dialogBox.setAnimationEnabled(true);
  final Button closeButton = new Button("Close");
  // We can set the id of a widget by accessing its Element
  closeButton.getElement().setId("closeButton");
  final Label textToServerLabel = new Label();
  final HTML serverResponseLabel = new HTML();
  VerticalPanel dialogVPanel = new VerticalPanel();
  dialogVPanel.addStyleName("dialogVPanel");
  dialogVPanel.add(new HTML("<b>Sending request to the server:</b>"));
  dialogVPanel.add(textToServerLabel);
  dialogVPanel.add(new HTML("
<b>Server replies:</b>"));
  dialogVPanel.add(serverResponseLabel);
  dialogVPanel.setHorizontalAlignment(VerticalPanel.ALIGN_RIGHT);
  dialogVPanel.add(closeButton);
  dialogBox.setWidget(dialogVPanel);

  // Add a handler to close the DialogBox
  closeButton.addClickHandler(new ClickHandler() {
   public void onClick(ClickEvent event) {
    dialogBox.hide();
    saveOrUpdateButton.setEnabled(true);
    saveOrUpdateButton.setFocus(true);
    retrieveButton.setEnabled(true);
   }
  });

  // Create a handler for the saveOrUpdateButton and employeeInfoField
  class SaveOrUpdateEmployeeHandler implements ClickHandler, KeyUpHandler {
   /**
    * Fired when the user clicks on the saveOrUpdateButton.
    */
   public void onClick(ClickEvent event) {
    sendEmployeeInfoToServer();
   }

   /**
    * Fired when the user types in the employeeInfoField.
    */
   public void onKeyUp(KeyUpEvent event) {
    if (event.getNativeKeyCode() == KeyCodes.KEY_ENTER) {
     sendEmployeeInfoToServer();
    }
   }

   /**
    * Send the employee info from the employeeInfoField to the server and wait for a response.
    */
   private void sendEmployeeInfoToServer() {
    // First, we validate the input.
    errorLabel.setText("");
    String textToServer = employeeInfoField.getText();

    // Then, we send the input to the server.
    saveOrUpdateButton.setEnabled(false);
    textToServerLabel.setText(textToServer);
    serverResponseLabel.setText("");

    String[] employeeInfo = textToServer.split(" ");
    
    long employeeId = Long.parseLong(employeeInfo[0]);
    String employeeName = employeeInfo[1];
    String employeeSurname = employeeInfo[2];
    String employeeJobTitle = employeeInfo[3];
    
    employeeService.saveOrUpdateEmployee(employeeId, employeeName, employeeSurname, employeeJobTitle, 
      new AsyncCallback<Void>() {
       public void onFailure(Throwable caught) {
        // Show the RPC error message to the user
        dialogBox
          .setText("Remote Procedure Call - Failure");
        serverResponseLabel
          .addStyleName("serverResponseLabelError");
        serverResponseLabel.setHTML(SERVER_ERROR + caught.toString());
        dialogBox.center();
        closeButton.setFocus(true);
       }

       public void onSuccess(Void noAnswer) {
        dialogBox.setText("Remote Procedure Call");
        serverResponseLabel
          .removeStyleName("serverResponseLabelError");
        serverResponseLabel.setHTML("OK");
        dialogBox.center();
        closeButton.setFocus(true);
       }
      });
   }
  }
  
  // Create a handler for the retrieveButton and employeeIdField
  class RetrieveEmployeeHandler implements ClickHandler, KeyUpHandler {
   /**
    * Fired when the user clicks on the retrieveButton.
    */
   public void onClick(ClickEvent event) {
    sendEmployeeIdToServer();
   }

   /**
    * Fired when the user types in the employeeIdField.
    */
   public void onKeyUp(KeyUpEvent event) {
    if (event.getNativeKeyCode() == KeyCodes.KEY_ENTER) {
     sendEmployeeIdToServer();
    }
   }

   /**
    * Send the id from the employeeIdField to the server and wait for a response.
    */
   private void sendEmployeeIdToServer() {
    // First, we validate the input.
    errorLabel.setText("");
    String textToServer = employeeIdField.getText();

    // Then, we send the input to the server.
    retrieveButton.setEnabled(false);
    textToServerLabel.setText(textToServer);
    serverResponseLabel.setText("");

    employeeService.findEmployee(Long.parseLong(textToServer),  
      new AsyncCallback<EmployeeDTO>() {
       public void onFailure(Throwable caught) {
        // Show the RPC error message to the user
        dialogBox
          .setText("Remote Procedure Call - Failure");
        serverResponseLabel
          .addStyleName("serverResponseLabelError");
        serverResponseLabel.setHTML(SERVER_ERROR + caught.toString());
        dialogBox.center();
        closeButton.setFocus(true);
       }

       public void onSuccess(EmployeeDTO employeeDTO) {
        dialogBox.setText("Remote Procedure Call");
        serverResponseLabel
          .removeStyleName("serverResponseLabelError");
        if(employeeDTO != null)
         serverResponseLabel.setHTML("Employee Information 
Id : " + employeeDTO.getEmployeeId() + "
Name : " + employeeDTO.getEmployeeName() + "
Surname : " + employeeDTO.getEmployeeSurname() + "
Job Title : " + employeeDTO.getJob());
        else
         serverResponseLabel.setHTML("No employee with the specified id found");
        dialogBox.center();
        closeButton.setFocus(true);
       }
      });
   }
  }

  // Add a handler to send the employee info to the server
  SaveOrUpdateEmployeeHandler saveOrUpdateEmployeehandler = new SaveOrUpdateEmployeeHandler();
  saveOrUpdateButton.addClickHandler(saveOrUpdateEmployeehandler);
  employeeInfoField.addKeyUpHandler(saveOrUpdateEmployeehandler);
  
  // Add a handler to send the employee id to the server
  RetrieveEmployeeHandler retrieveEmployeehandler = new RetrieveEmployeeHandler();
  retrieveButton.addClickHandler(retrieveEmployeehandler);
  employeeIdField.addKeyUpHandler(retrieveEmployeehandler);
 }

}
		

      
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<!-- The HTML 4.01 Transitional DOCTYPE declaration-->
<!-- above set at the top of the file will set     -->
<!-- the browser's rendering engine into           -->
<!-- "Quirks Mode". Replacing this declaration     -->
<!-- with a "Standards Mode" doctype is supported, -->
<!-- but may lead to some differences in layout.   -->

<html>
  <head>
    <meta http-equiv="content-type" content="text/html; charset=UTF-8">
    <!--                                           -->
    <!-- Any title is fine                         -->
    <!--                                           -->
    <title><a href="http://www.springsource.org/">Spring</a> <a href="http://code.google.com/webtoolkit/">GWT</a> Web Application Starter Project</title>
    
    <!--                                           -->
    <!-- This script loads your compiled module.   -->
    <!-- If you add any <a href="http://code.google.com/webtoolkit/">GWT</a> meta tags, they must   -->
    <!-- be added before this line.                -->
    <!--                                           -->
    <script type="text/javascript" language="javascript" src="com.javacodegeeks.gwtspring.Application.nocache.js"></script>
  </head>

  <!--                                           -->
  <!-- The body can have arbitrary html, or      -->
  <!-- you can leave the body empty if you want  -->
  <!-- to create a completely dynamic UI.        -->
  <!--                                           -->
  <body>

    <!-- OPTIONAL: include this if you want history support -->
    <iframe src="javascript:''" id="__gwt_historyFrame" tabIndex='-1' style="position:absolute;width:0;height:0;border:0"></iframe>

    <!-- RECOMMENDED if your web app will not function without JavaScript enabled -->
    <noscript>
      <div style="width: 22em; position: absolute; left: 50%; margin-left: -11em; color: red; background-color: white; border: 1px solid red; padding: 4px; font-family: sans-serif">
        Your web browser must have JavaScript enabled
        in order for this application to display correctly.
      </div>
    </noscript>

    <h1 align="center"><a href="http://www.springsource.org/">Spring</a> <a href="http://code.google.com/webtoolkit/">GWT</a> Web Application Starter Project</h1>

    <table align="center">
      <tr>
        <td colspan="2" style="font-weight:bold;">Please enter employee info (id name surname job):</td>        
      </tr>
      <tr>
        <td id="employeeInfoFieldContainer"></td>
        <td id="updateEmployeeButtonContainer"></td>
      </tr>
      <tr>
      <tr>
        <td colspan="2" style="font-weight:bold;">Please enter employee id:</td>        
      </tr>
      <tr>
        <td id="employeeIdFieldContainer"></td>
        <td id="retrieveEmployeeButtonContainer"></td>
      </tr>
      <tr>
        <td colspan="2" style="color:red;" id="errorLabelContainer"></td>
      </tr>
    </table>

  </body>
</html>
		

      
http://localhost:8080/{application_name}/