DZone
Thanks for visiting DZone today,
Edit Profile
  • Manage Email Subscriptions
  • How to Post to DZone
  • Article Submission Guidelines
Sign Out View Profile
  • Post an Article
  • Manage My Drafts
Over 2 million developers have joined DZone.
Log In / Join
Refcards Trend Reports
Events Video Library
Over 2 million developers have joined DZone. Join Today! Thanks for visiting DZone today,
Edit Profile Manage Email Subscriptions Moderation Admin Console How to Post to DZone Article Submission Guidelines
View Profile
Sign Out
Refcards
Trend Reports
Events
View Events Video Library
Zones
Culture and Methodologies Agile Career Development Methodologies Team Management
Data Engineering AI/ML Big Data Data Databases IoT
Software Design and Architecture Cloud Architecture Containers Integration Microservices Performance Security
Coding Frameworks Java JavaScript Languages Tools
Testing, Deployment, and Maintenance Deployment DevOps and CI/CD Maintenance Monitoring and Observability Testing, Tools, and Frameworks
Culture and Methodologies
Agile Career Development Methodologies Team Management
Data Engineering
AI/ML Big Data Data Databases IoT
Software Design and Architecture
Cloud Architecture Containers Integration Microservices Performance Security
Coding
Frameworks Java JavaScript Languages Tools
Testing, Deployment, and Maintenance
Deployment DevOps and CI/CD Maintenance Monitoring and Observability Testing, Tools, and Frameworks

Integrating PostgreSQL Databases with ANF: Join this workshop to learn how to create a PostgreSQL server using Instaclustr’s managed service

Mobile Database Essentials: Assess data needs, storage requirements, and more when leveraging databases for cloud and edge applications.

Monitoring and Observability for LLMs: Datadog and Google Cloud discuss how to achieve optimal AI model performance.

Automated Testing: The latest on architecture, TDD, and the benefits of AI and low-code tools.

Related

  • Hibernate, Redis, and L2 Cache Performance
  • Caching in Hibernate With Redis
  • Spring + Hibernate + EhCache Caching
  • Auditing Spring Boot Using JPA, Hibernate, and Spring Data JPA

Trending

  • Spring WebFlux Retries
  • Modular Software Architecture: Advantages and Disadvantages of Using Monolith, Microservices and Modular Monolith
  • Best Practices for Writing Clean Java Code
  • CI/CD Docker: How To Create a CI/CD Pipeline With Jenkins, Containers, and Amazon ECS
  1. DZone
  2. Data Engineering
  3. Data
  4. Clearing Hibernate Second-Level Caches

Clearing Hibernate Second-Level Caches

Mike Desjardins user avatar by
Mike Desjardins
·
Oct. 24, 08 · Interview
Like (1)
Save
Tweet
Share
62.31K Views

Join the DZone community and get the full member experience.

Join For Free

Recently, I wanted to be able to clear out all of the Hibernate caches via JBoss's JMX console. I could have taken the easy way out; we're using EHCache, so it could have been as simple as calling CacheManager.clearAll(). However, that would have tied me to a specific cache provider. We're still evaluating switching to other cache providers. Ideally, my solution would not be dependent on a specific cache implementation.

Hibernate's API does provide a simple way to clear specific caches, but does not provide any method for clearing out all of them. Writing your own is fairly straightforward. First, you obtain all of the entity and collection metadata from the session factory. Next you iterate over the entities, and if the object is cached, you clear out all of the caches associated with the persisted class or collection. Here's the code:

  @PersistenceContext  private EntityManager em;  public void clearHibernateCache() {      Session s = (Session)em.getDelegate();      SessionFactory sf = s.getSessionFactory();         Map classMetadata = sf.getAllClassMetadata();      for (EntityPersister ep : classMetadata.values()) {          if (ep.hasCache()) {              sf.evictEntity(ep.getCache().getRegionName());          }      }         Map collMetadata = sf.getAllCollectionMetadata();      for (AbstractCollectionPersister acp : collMetadata.values()) {          if (acp.hasCache()) {              sf.evictCollection(acp.getCache().getRegionName());          }      }         return;  }

Now, if we decide to switch to a different cache provider, this code will not need to be re-written. Hopefully we won't ever change to a different JPA implementaion. :)

From http://mikedesjardins.us/blog/

 

Cache (computing) Hibernate

Opinions expressed by DZone contributors are their own.

Related

  • Hibernate, Redis, and L2 Cache Performance
  • Caching in Hibernate With Redis
  • Spring + Hibernate + EhCache Caching
  • Auditing Spring Boot Using JPA, Hibernate, and Spring Data JPA

Comments

Partner Resources

X

ABOUT US

  • About DZone
  • Send feedback
  • Careers
  • Sitemap

ADVERTISE

  • Advertise with DZone

CONTRIBUTE ON DZONE

  • Article Submission Guidelines
  • Become a Contributor
  • Visit the Writers' Zone

LEGAL

  • Terms of Service
  • Privacy Policy

CONTACT US

  • 3343 Perimeter Hill Drive
  • Suite 100
  • Nashville, TN 37211
  • support@dzone.com

Let's be friends: