Hello,
I have a question concerning transient members. In the follwoing code there is
an Entity Bean:
package entities;
|
| import java.io.Serializable;
| import java.util.*;
| import javax.persistence.*;
|
| @Entity
| public class Node implements Serializable {
|
| private int id;
| private String persistentText;
| private String transientText;
|
| public Node(){}
|
| public Node(int id)
| {
| setId(id);
| }
|
| @Id
| public int getId() {
| return id;
| }
|
| public void setId(int id) {
| this.id = id;
| }
|
| public String getPersistentText() {
| return persistentText;
| }
|
| public void setPersistentText(String persistentText) {
| this.persistentText = persistentText;
| }
|
| @Transient
| public String getTransientText() {
| return transientText;
| }
|
| public void setTransientText(String transientText) {
| this.transientText = transientText;
| }
| }
a Session Bean:
package server.sessions;
|
| import javax.ejb.*;
| import javax.persistence.*;
| import org.hibernate.*;
| import entities.*;
|
| import java.util.*;
|
| @Stateful
| public class ClientSessionBean implements ClientSessionLocal,
ClientSessionRemote{
|
| @PersistenceContext private EntityManager manager;
|
| List<Node> nodes;
| Node node;
|
| public void createNode()
| {
| node = new Node(1);
| node.setTransientText("transient");
| node.setPersistentText("persistent");
| manager.persist(node);
| nodes = manager.createQuery("from Node where
id=1").getResultList();
| node = nodes.get(0);
| System.out.println("createNode persistentText:
"+node.getPersistentText());
| System.out.println("createNode transientText:
"+node.getTransientText());
| }
|
| public void showNode()
| {
| nodes = manager.createQuery("from Node where
id=1").getResultList();
| node = nodes.get(0);
| System.out.println("showNode persistentText:
"+node.getPersistentText());
| System.out.println("showNode transientText:
"+node.getTransientText());
| }
|
| }
|
and a client, which calls the two methods createNode() and showNode():
package client;
|
| import javax.naming.InitialContext;
| import java.util.*;
| import entities.*;
| import server.sessions.*;
|
| public class Client {
|
| static ClientSession clientSession;
|
| public static void main(String[] args) {
| try {
| Hashtable<String,String> env = new
Hashtable<String,String>();
| env.put("java.naming.factory.initial",
"org.jnp.interfaces.NamingContextFactory");
| env.put("java.naming.factory.url.pkgs",
"org.jboss.naming:org.jnp.interfaces");
| env.put("java.naming.provider.url", "localhost");
| InitialContext ctx = new InitialContext(env);
| clientSession =
(ClientSession)ctx.lookup("ClientSessionBean/remote");
| clientSession.createNode();
| clientSession.showNode();
| }
| catch (Exception e)
| {
| System.out.println(e);
| }
| }
| }
I get the following answer:
..
10:59:02,531 INFO [STDOUT] createNode persistentText: persistent
10:59:02,531 INFO [STDOUT] createNode transientText: transient
10:59:02,562 INFO [STDOUT] showNode persistentText: persistent
10:59:02,562 INFO [STDOUT] showNode transientText: null
..
Is the last line correct? I've exptected the last line:
10:59:02,562 INFO [STDOUT] showNode transientText: transient
Thanks for your efforts.
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