Entity Instances Fetched in Different Sessions

Deepika Sahu answered on December 30, 2022 Popularity 1/10 Helpfulness 1/10

answer Entity Instances Fetched in Different Sessions

related Entity Instances Fetched in Same Session

Entity Instances Fetched in Different Sessions

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@Entity
@Table(name = "Employee")
public class EmployeeEntity implements Serializable
{
   private static final long serialVersionUID = -1798070786993154676L;
   @Id
   @Column(name = "ID", unique = true, nullable = false)
   @GeneratedValue(strategy = GenerationType.SEQUENCE)
   private Integer           employeeId;
   @Column(name = "FIRST_NAME", unique = false, nullable = false, length = 100)
   private String            firstName;
   @Column(name = "LAST_NAME", unique = false, nullable = false, length = 100)
   private String            lastName;

   @Override
   public boolean equals(Object o) {
       if (this == o) return true;
       if (!(o instanceof EmployeeEntity)) return false;

       EmployeeEntity otherEmployee = (EmployeeEntity) o;

       if (getEmployeeId() != null ?
           !getEmployeeId().equals(otherEmployee.getEmployeeId()) : otherEmployee.getEmployeeId() != null)
           return false;
       if (getFirstName() != null ?
           !getFirstName().equals(otherEmployee.getFirstName()) : otherEmployee.getFirstName() != null)
           return false;
       if (getLastName() != null ?
           !getLastName().equals(otherEmployee.getLastName()) : otherEmployee.getLastName() != null)
           return false;

       return true;
   }

   @Override
   public int hashCode() {
   int result = getEmployeeId() != null ? getEmployeeId().hashCode() : 0;
       result = 31 * result + (getFirstName() != null ? getFirstName().hashCode() : 0);
       result = 31 * result + (getLastName() != null?getLastName().hashCode() : 0);
       return result;
   }

   //Setters and Getters
}

Popularity 1/10 Helpfulness 1/10 Language java

Source: howtodoinjava.com

Tags: entity instances java

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Contributed on Dec 30 2022

Deepika Sahu

0 Answers Avg Quality 2/10

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Entity Instances Fetched in Same Session

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public static void main(String[] args)
{
	Session sessionOne = HibernateUtil.getSessionFactory().openSession();
	sessionOne.beginTransaction();

	// Create new Employee object
	EmployeeEntity emp = new EmployeeEntity();
	emp.setFirstName("Lokesh");
	emp.setLastName("Gupta");
	//Save employee
	sessionOne.save(emp);

	sessionOne.getTransaction().commit();

	//Get employee id
	Integer empId = emp.getEmployeeId();

	//New session where we will fetch the employee two times and compare the objects
	Session sessionTwo = HibernateUtil.getSessionFactory().openSession();
	sessionTwo.beginTransaction();

	EmployeeEntity employeeObj1 = (EmployeeEntity) sessionTwo.get(EmployeeEntity.class, empId);
	EmployeeEntity employeeObj2 = (EmployeeEntity) sessionTwo.get(EmployeeEntity.class, empId);

	//Checking equality
	System.out.println(employeeObj1 == employeeObj2);      //TRUE

	HibernateUtil.shutdown();
}

Popularity 1/10 Helpfulness 1/10 Language java

Source: howtodoinjava.com

Tags: java session entity instances

Link to this answer
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Contributed on Dec 30 2022

Deepika Sahu

0 Answers Avg Quality 2/10

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