Java 如何使用 Spring 清除所有 Hibernate 缓存（ehcache）？
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How to clear all Hibernate cache (ehcache) using Spring?
提问by cometta
I am using 2nd level cache and query cache. May I know how to programmatically clear all caches ?
我正在使用二级缓存和查询缓存。我可以知道如何以编程方式清除所有缓存吗？
采纳答案by Bozho
To clear the session cache use session.clear()
清除会话缓存使用 session.clear()
To clear the 2nd level cache use this code snippet
要清除二级缓存，请使用此代码片段
回答by Taylor Gautier
If you plug in Terracotta, you also have the ability to run the Terracotta Dev Console which can inspect statistics about the cache, turn on and turn off the cache, and clear the cache contents from the user interface.
如果您插入 Terracotta，您还可以运行 Terracotta Dev Console，它可以检查有关缓存的统计信息、打开和关闭缓存以及从用户界面清除缓存内容。
This functionality is also available from JMX beans.
JMX bean 也提供此功能。
回答by Dino
The code snippet indicated in Bozho answer is deprecated in Hibernate 4.
Bozho 回答中指示的代码片段在 Hibernate 4 中已弃用。
According to Hibernate JavaDoc, you can use org.hibernate.Cache.evictAllRegions():
根据 Hibernate JavaDoc，您可以使用org.hibernate.Cache.evictAllRegions()：
Evict data from all query regions.
从所有查询区域中驱逐数据。
Using the API :
使用 API ：
Session session = sessionFactory.getCurrentSession();
if (session != null) {
session.clear(); // internal cache clear
}
Cache cache = sessionFactory.getCache();
if (cache != null) {
cache.evictAllRegions(); // Evict data from all query regions.
}
Alternatively, you can clear all data from a specific scope :
或者，您可以清除特定范围内的所有数据：
org.hibernate.Cache.evictCollectionRegions()
org.hibernate.Cache.evictDefaultQueryRegion()
org.hibernate.Cache.evictEntityRegions()
org.hibernate.Cache.evictQueryRegions()
org.hibernate.Cache.evictNaturalIdRegions()
You might want to check the JavaDoc for hibernate Cache interface (Hibernate 4.3).
您可能需要查看JavaDoc 以获取 hibernate Cache interface (Hibernate 4.3)。
And also, second-level cache evictionfrom hibernate dev guide (4.3).
此外，从休眠开发指南 (4.3) 中驱逐二级缓存。
回答by Raju Yadav
you can go with this also
你也可以用这个
request.getSession().invalidate();
response.setHeader("Cache-Control", "no-cache, no-store, must-revalidate");
response.setHeader("Pragma", "no-cache");
response.setDateHeader("Expires", 0);
回答by atish shimpi
If you want to clear 2nd level cache, use api sessionFactory.evictEntity(entityName)
如果要清除二级缓存，请使用 api sessionFactory.evictEntity(entityName)
Code:
代码：
/**
* Evicts all second level cache hibernate entites. This is generally only
* needed when an external application modifies the database.
*/
public void evict2ndLevelCache() {
try {
Map<String, ClassMetadata> classesMetadata = sessionFactory.getAllClassMetadata();
for (String entityName : classesMetadata.keySet()) {
logger.info("Evicting Entity from 2nd level cache: " + entityName);
sessionFactory.evictEntity(entityName);
}
} catch (Exception e) {
logger.logp(Level.SEVERE, "SessionController", "evict2ndLevelCache", "Error evicting 2nd level hibernate cache entities: ", e);
}
}
For more details on 2nd level cache refer
有关二级缓存的更多详细信息，请参阅
回答by KC Baltz
@Dino 's answer almost worked for me but I got an error from sessionFactory.getCurrentSession()(No currentSessionContext configured!). I found this worked for me:
@Dino 的回答几乎对我有用，但我收到了一个错误sessionFactory.getCurrentSession()（没有配置 currentSessionContext！）。我发现这对我有用：
// Use @Autowired EntityManager em
em.getEntityManagerFactory().getCache().evictAll();
// All of the following require org.hibernate imports
Session session = em.unwrap(Session.class);
if (session != null) {
session.clear(); // internal cache clear
}
SessionFactory sessionFactory = em.getEntityManagerFactory().unwrap(SessionFactory.class);
Cache cache = sessionFactory.getCache();
if (cache != null) {
cache.evictAllRegions(); // Evict data from all query regions.
}
