HHH-7130 Query cache eviction logging

Author: Zbyněk Roubalík

hibernate-core/src/main/java/org/hibernate/internal/CacheImpl.java

@@ -232,6 +232,9 @@ public boolean containsQuery(String regionName) {
 	@Override
 	public void evictDefaultQueryRegion() {
 		if ( sessionFactory.getSettings().isQueryCacheEnabled() ) {
+            if ( LOG.isDebugEnabled() ) {
+                LOG.debugf( "Evicting default query region cache." );
+            }
 			sessionFactory.getQueryCache().clear();
 		}
 	}
@@ -247,6 +250,9 @@ public void evictQueryRegion(String regionName) {
 			QueryCache namedQueryCache = queryCaches.get( regionName );
 			// TODO : cleanup entries in queryCaches + allCacheRegions ?
 			if ( namedQueryCache != null ) {
+                if ( LOG.isDebugEnabled() ) {
+                    LOG.debugf( "Evicting query cache, region: %s", regionName );
+                }
 				namedQueryCache.clear();
 			}
 		}
@@ -257,6 +263,9 @@ public void evictQueryRegions() {
 		if ( CollectionHelper.isEmpty( queryCaches ) ) {
 			return;
 		}
+        if ( LOG.isDebugEnabled() ) {
+            LOG.debugf( "Evicting cache of all query regions." );
+        }
 		for ( QueryCache queryCache : queryCaches.values() ) {
 			queryCache.clear();
 			// TODO : cleanup entries in queryCaches + allCacheRegions ?