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File: Employee.java
import javax.persistence.Entity;
import javax.persistence.EntityListeners;
import javax.persistence.GeneratedValue;
import javax.persistence.Id;
import javax.persistence.PostRemove;
@Entity
public class Employee implements java.io.Serializable {
private int id;
private String firstName;
private String lastName;
@Id
@GeneratedValue
public int getId() {
return id;
}
@PostRemove
public void postRemove()
{
System.out.println("@PostRemove");
}
public void setId(int id) {
this.id = id;
}
public String getFirstName() {
return firstName;
}
public void setFirstName(String first) {
this.firstName = first;
}
public String getLastName() {
return lastName;
}
public void setLastName(String last) {
this.lastName = last;
}
}
File: EmployeeBean.java
import java.util.HashMap;
import java.util.Map;
import javax.ejb.Remove;
import javax.ejb.Stateful;
@Stateful
public class EmployeeBean implements EmployeeServiceLocal, EmployeeServiceRemote {
public EmployeeBean() {
}
private HashMap<String,Integer> items = new HashMap<String,Integer>();
public void addItem(String item, int quantity) {
Integer orderQuantity = items.get(item);
if (orderQuantity == null) {
orderQuantity = 0;
}
orderQuantity += quantity;
items.put(item, orderQuantity);
}
public void removeItem(String item, int quantity) {
Integer orderQuantity = items.get(item);
if (orderQuantity == null) {
return;
}
orderQuantity -= quantity;
if (orderQuantity > 0) {
items.put(item, orderQuantity);
} else {
items.remove(item);
}
}
public Map<String, Integer> getItems() {
return items;
}
@Remove
public void checkout(int paymentId) {
System.out.println("checkout");
}
@Remove
public void cancel() {
}
}
File: EmployeeServiceLocal.java
import java.util.Map;
import javax.ejb.Local;
@Local
public interface EmployeeServiceLocal {
public void addItem(String id, int quantity);
public void removeItem(String id, int quantity);
public Map<String, Integer> getItems();
public void checkout(int paymentId);
public void cancel();
}
File: EmployeeServiceRemote.java
import java.util.Map;
import javax.ejb.Remote;
@Remote
public interface EmployeeServiceRemote {
public void addItem(String id, int quantity);
public void removeItem(String id, int quantity);
public Map<String, Integer> getItems();
public void checkout(int paymentId);
public void cancel();
}
File: jndi.properties
java.naming.factory.initial=org.jnp.interfaces.NamingContextFactory
java.naming.factory.url.pkgs=org.jboss.naming:org.jnp.interfaces
java.naming.provider.url=localhost:1099
File: Main.java
import javax.ejb.EJB;
import javax.naming.InitialContext;
public class Main {
public static void main(String[] a) throws Exception {
EmployeeServiceRemote service = null;
// Context compEnv = (Context) new InitialContext().lookup("java:comp/env");
// service = (HelloService)new InitialContext().lookup("java:comp/env/ejb/HelloService");
service = (EmployeeServiceRemote) new InitialContext().lookup("EmployeeBean/remote");
service.addItem("item", 10);
service.removeItem("item", 1);
service.checkout(10);
//service.cancel();
}
}
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EJB-RemoveAStatefulSessionBean.zip( 4,489 k)