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Second level Cache

Animesh Das answered on August 8, 2022 Popularity 1/10 Helpfulness 1/10

answer Second level Cache

Second level Cache

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// Open hibernate session
Session session = HibernateUtil.getSessionFactory().openSession();
session.beginTransaction();

// Employee entity is fecthed very first time (It will be cached in both first-level and second-level cache)
Employee employee = (Employee) session.load(Employee.class, empId);
System.out.println(employee.getName());

// Fetch the employee entity again
employee = (Employee) session.load(Employee.class, empId);
System.out.println(employee.getName()); //It will return from the first-level

// Evict from first level cache (That will remove employee object from first-level cache)
session.evict(employee);

// Fetch same entity again using same session
employee = (Employee) session.load(Employee.class, empId);
System.out.println(employee.getName()); //It will return from the second-level

// Fetch same entity again using another session
employee = (Employee) anotherSession.load(Employee.class, empId);
System.out.println(employee.getName());//It will return from the second-level

System.out.println("Response from the first-level : " + HibernateUtil.getSessionFactory().getStatistics().getEntityFetchCount());
System.out.println("Response from the second-level : " + HibernateUtil.getSessionFactory().getStatistics().getSecondLevelCacheHitCount());
 
// Output:
// Response from the first-level : 1
// Response from the second-level : 2

Popularity 1/10 Helpfulness 1/10 Language java

Source: medium.com

Tags: java second-level-cache

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Contributed on Aug 08 2022

Animesh Das

0 Answers Avg Quality 2/10

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