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Use Lifecycle Method To Manage Collection In Stateful Session Bean
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File: EmployeeBean.java
import java.util.ArrayList;
import javax.annotation.PostConstruct;
import javax.annotation.PreDestroy;
import javax.ejb.Remove;
import javax.ejb.Stateful;
@Stateful
public class EmployeeBean implements EmployeeServiceLocal, EmployeeServiceRemote {
public EmployeeBean() {
}
public ArrayList cartItems;
public void addWineItem(String wine) {
cartItems.add(wine);
}
public void removeWineItem(String wine) {
cartItems.remove(wine);
}
public void setCartItems(ArrayList cartItems) {
this.cartItems = cartItems;
}
public ArrayList getCartItems() {
return cartItems;
}
@PostConstruct
public void initialize() {
cartItems = new ArrayList();
}
@PreDestroy
public void exit() {
System.out.println("Saved items list into database");
}
@Remove
public void stopSession() {
// The method body can be empty.
System.out.println("From stopSession method with @Remove annotation");
}
public void doAction() {
System.out.println("Processing...");
}
}
File: EmployeeServiceLocal.java
import javax.ejb.Local;
import javax.ejb.Remote;
@Local
public interface EmployeeServiceLocal{
public void doAction();
}
File: EmployeeServiceRemote.java
import javax.ejb.Remote;
@Remote
public interface EmployeeServiceRemote {
public void doAction();
}
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: 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.doAction();
}
}
EJB-UseLifecycleMethodToManageCollectionInStatefullBean.zip( 4,489 k)
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