Уважаемые, нужен совет... Взялся за JSF... Сгенерировал код в NetBeans 5.5... проанализировал его - пытаюсь заставить работать... Существуют нормально работающие бины EJB3 (например, CountryEJB с полями id, ncodeCountry, nameCountry)... Что делает NetBeans... Как я понимаю, он работает через фасад... То есть JSF подрубается к классу-фасаду (т.н. managed-bean), а тот уже разруливает дела с персистентными бинами EJB3... Вот класс CountryEJB | Код |
/*
* CountryEJB.java
*
* Created on 2 Март 2007 г., 10:22
*
* To change this template, choose Tools | Template Manager
* and open the template in the editor.
*/
package addressEJB;
import java.io.Serializable;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
import javax.persistence.Table;
/**
* Entity class CountryEJB
*
* @author U0109
*/
@Entity
@Table(name="Country")
public class CountryEJB implements Serializable {
@Id
@GeneratedValue(strategy = GenerationType.AUTO)
private Long id;
private String codeCountry;
private String nameCountry;
/** Creates a new instance of CountryEJB */
public CountryEJB() {
}
/**
* Gets the id of this CountryEJB.
* @return the id
*/
public Long getId() {
return this.id;
}
/**
* Sets the id of this CountryEJB to the specified value.
* @param id the new id
*/
public void setId(Long id) {
this.id = id;
}
/**
* Returns a hash code value for the object. This implementation computes
* a hash code value based on the id fields in this object.
* @return a hash code value for this object.
*/
@Override
public int hashCode() {
int hash = 0;
hash += (this.getId() != null ? this.getId().hashCode() : 0);
return hash;
}
/**
* Determines whether another object is equal to this CountryEJB. The result is
* <code>true</code> if and only if the argument is not null and is a CountryEJB object that
* has the same id field values as this object.
* @param object the reference object with which to compare
* @return <code>true</code> if this object is the same as the argument;
* <code>false</code> otherwise.
*/
@Override
public boolean equals(Object object) {
// TODO: Warning - this method won't work in the case the id fields are not set
if (!(object instanceof CountryEJB)) {
return false;
}
CountryEJB other = (CountryEJB)object;
if (this.getId() != other.getId() && (this.getId() == null || !this.getId().equals(other.getId()))) return false;
return true;
}
/**
* Returns a string representation of the object. This implementation constructs
* that representation based on the id fields.
* @return a string representation of the object.
*/
@Override
public String toString() {
return "addressEJB.CountryEJB[id=" + getId() + ", codeCountry="+getCodeCountry()+", nameCountry="+getNameCountry()+"]";
}
public String getCodeCountry() {
return codeCountry;
}
public void setCodeCountry(String codeCountry) {
this.codeCountry = codeCountry;
}
public String getNameCountry() {
return nameCountry;
}
public void setNameCountry(String nameCountry) {
this.nameCountry = nameCountry;
}
}
|
Он нормально работает.. находится в том же EAR, куда лежат и JSF страницы... Вот фасад-менеджер JSF... | Код |
/*
* CountryEJBController.java
*
* Created on 19 Март 2007 г., 16:56
*
* To change this template, choose Tools | Template Manager
* and open the template in the editor.
*/
package addressJSF;
import addressEJB.CountryEJB;
import java.util.ArrayList;
import java.util.Collection;
import javax.annotation.Resource;
import javax.faces.application.FacesMessage;
import javax.faces.context.FacesContext;
import javax.faces.model.DataModel;
import javax.faces.model.ListDataModel;
import javax.persistence.EntityManager;
import javax.persistence.EntityManagerFactory;
import javax.persistence.PersistenceUnit;
import javax.persistence.Query;
import javax.transaction.UserTransaction;
/**
*
* @author U0109
*/
public class CountryEJBController {
/** Creates a new instance of CountryEJBController */
public CountryEJBController() {
}
private CountryEJB countryEJB;
private DataModel model;
@Resource
private UserTransaction utx;
@PersistenceUnit(unitName = "Address-warPU")
private EntityManagerFactory emf;
private EntityManager getEntityManager() {
return emf.createEntityManager();
}
private int batchSize = 20;
private int firstItem = 0;
public CountryEJB getCountryEJB() {
return countryEJB;
}
public void setCountryEJB(CountryEJB countryEJB) {
this.countryEJB = countryEJB;
}
public DataModel getDetailCountryEJBs() {
return model;
}
public void setDetailCountryEJBs(Collection<CountryEJB> m) {
model = new ListDataModel(new ArrayList(m));
}
public String createSetup() {
this.countryEJB = new CountryEJB();
return "countryEJB_create";
}
public String create() {
EntityManager em = getEntityManager();
try {
utx.begin();
em.persist(countryEJB);
utx.commit();
addSuccessMessage("CountryEJB was successfully created.");
} catch (Exception ex) {
try {
addErrorMessage(ex.getLocalizedMessage());
utx.rollback();
} catch (Exception e) {
addErrorMessage(e.getLocalizedMessage());
}
} finally {
em.close();
}
return "countryEJB_list";
}
public String detailSetup() {
setCountryEJBFromRequestParam();
return "countryEJB_detail";
}
public String editSetup() {
setCountryEJBFromRequestParam();
return "countryEJB_edit";
}
public String edit() {
EntityManager em = getEntityManager();
try {
utx.begin();
countryEJB = em.merge(countryEJB);
utx.commit();
addSuccessMessage("CountryEJB was successfully updated.");
} catch (Exception ex) {
try {
addErrorMessage(ex.getLocalizedMessage());
utx.rollback();
} catch (Exception e) {
addErrorMessage(e.getLocalizedMessage());
}
} finally {
em.close();
}
return "countryEJB_list";
}
public String destroy() {
EntityManager em = getEntityManager();
try {
utx.begin();
CountryEJB countryEJB = getCountryEJBFromRequestParam();
countryEJB = em.merge(countryEJB);
em.remove(countryEJB);
utx.commit();
addSuccessMessage("CountryEJB was successfully deleted.");
} catch (Exception ex) {
try {
addErrorMessage(ex.getLocalizedMessage());
utx.rollback();
} catch (Exception e) {
addErrorMessage(e.getLocalizedMessage());
}
} finally {
em.close();
}
return "countryEJB_list";
}
public CountryEJB getCountryEJBFromRequestParam() {
EntityManager em = getEntityManager();
try{
CountryEJB o = (CountryEJB) model.getRowData();
o = em.merge(o);
return o;
} finally {
em.close();
}
}
public void setCountryEJBFromRequestParam() {
CountryEJB countryEJB = getCountryEJBFromRequestParam();
setCountryEJB(countryEJB);
}
public DataModel getCountryEJBs() {
EntityManager em = getEntityManager();
try{
Query q = em.createQuery("select object(o) from CountryEJB as o");
q.setMaxResults(batchSize);
q.setFirstResult(firstItem);
model = new ListDataModel(q.getResultList());
return model;
} finally {
em.close();
}
}
public static void addErrorMessage(String msg) {
FacesMessage facesMsg = new FacesMessage(FacesMessage.SEVERITY_ERROR, msg, msg);
FacesContext fc = FacesContext.getCurrentInstance();
fc.addMessage(null, facesMsg);
}
public static void addSuccessMessage(String msg) {
FacesMessage facesMsg = new FacesMessage(FacesMessage.SEVERITY_INFO, msg, msg);
FacesContext fc = FacesContext.getCurrentInstance();
fc.addMessage("successInfo", facesMsg);
}
public CountryEJB findCountryEJB(Long id) {
EntityManager em = getEntityManager();
try{
CountryEJB o = (CountryEJB) em.find(CountryEJB.class, id);
return o;
} finally {
em.close();
}
}
public int getItemCount() {
EntityManager em = getEntityManager();
try{
int count = ((Long) em.createQuery("select count(o) from CountryEJB as o").getSingleResult()).intValue();
return count;
} finally {
em.close();
}
}
public int getFirstItem() {
return firstItem;
}
public int getLastItem() {
int size = getItemCount();
return firstItem + batchSize > size ? size : firstItem + batchSize;
}
public int getBatchSize() {
return batchSize;
}
public String next() {
if (firstItem + batchSize < getItemCount()) {
firstItem += batchSize;
}
return "countryEJB_list";
}
public String prev() {
firstItem -= batchSize;
if (firstItem < 0) {
firstItem = 0;
}
return "countryEJB_list";
}
}
|
есть еще конвертер, смысла которого я еще не понял (если кто подскажет - буду благодарен)... | Код |
/*
* CountryEJBConverter.java
*
* Created on 19 Март 2007 г., 16:56
*
* To change this template, choose Tools | Template Manager
* and open the template in the editor.
*/
package addressJSF;
import addressEJB.CountryEJB;
import javax.faces.component.UIComponent;
import javax.faces.context.FacesContext;
import javax.faces.convert.Converter;
/**
*
* @author U0109
*/
public class CountryEJBConverter implements Converter {
/** Creates a new instance of CountryEJBConverter */
public CountryEJBConverter() {
}
public Object getAsObject(FacesContext facesContext, UIComponent uIComponent, String string) {
if (string == null) {
return null;
}
Long id = new Long(string);
CountryEJBController controller = (CountryEJBController) facesContext.getApplication().getELResolver().getValue(
facesContext.getELContext(), null, "countryEJB");
return controller.findCountryEJB(id);
}
public String getAsString(FacesContext facesContext, UIComponent uIComponent, Object object) {
if (object == null) {
return null;
}
if(object instanceof CountryEJB) {
CountryEJB o = (CountryEJB) object;
return "" + o.getId();
} else {
throw new IllegalArgumentException("object:" + object + " of type:" + object.getClass().getName() + "; expected type: addressEJB.CountryEJB");
}
}
}
|
А вот и полученная JSF-страница... | Код |
<%@page contentType="text/html"%>
<%@page pageEncoding="UTF-8"%>
<%@taglib uri="http://java.sun.com/jsf/core" prefix="f" %>
<%@taglib uri="http://java.sun.com/jsf/html" prefix="h" %>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
<title>New CountryEJB</title>
</head>
<body>
<f:view>
<h:messages errorStyle="color: red" infoStyle="color: green" layout="table"/>
<h1>New countryEJB</h1>
<h:form>
<h:panelGrid columns="2">
<h:outputText value="CodeCountry:"/>
<h:inputText id="codeCountry" value="#{countryEJB.countryEJB.codeCountry}" title="CodeCountry" />
<h:outputText value="NameCountry:"/>
<h:inputText id="nameCountry" value="#{countryEJB.countryEJB.nameCountry}" title="NameCountry" />
</h:panelGrid>
<h:commandLink action="#{countryEJB.create}" value="Create"/>
<br>
<h:commandLink action="countryEJB_list" value="Show All CountryEJB"/>
<br>
<a href="/Address-war/index.jsp">Back to index</a>
</h:form>
</f:view>
</body>
</html>
|
Эта страница появляется на экране браузера, однако при поптыке нажать кнопку CREATE для создания данных появляется ошибка... | Код |
javax.el.PropertyNotFoundException: Target Unreachable, 'countryEJB' returned null
|
Я так понимаю - самого экземпляра бина-менеджера не существует... Он не создается... Почему же? И где его надо создать? |
JSF не видит своего managed-bean, в генерированном коде NetBeans 5.5 
Дата 20.3.2007, 11:11 (
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