HHH-5025 - RevisionType serialization fix and test

hibernate-envers/src/main/java/org/hibernate/envers/entities/RevisionTypeType.java

@@ -38,7 +38,9 @@ import org.hibernate.usertype.UserType;
  * A hibernate type for the {@link RevisionType} enum.
  * @author Adam Warski (adam at warski dot org)
  */
-public class RevisionTypeType implements UserType {
+public class RevisionTypeType implements UserType, Serializable {
+    private static final long serialVersionUID = -1053201518229282688L;
+    
     private static final int[] SQL_TYPES = { Types.TINYINT };
 
     public int[] sqlTypes() {

hibernate-envers/src/test/java/org/hibernate/envers/test/integration/cache/HibernateSecLvlQueryCache.java

@@ -0,0 +1,67 @@
+package org.hibernate.envers.test.integration.cache;
+
+import org.hibernate.MappingException;
+import org.hibernate.cache.internal.EhCacheProvider;
+import org.hibernate.cfg.Environment;
+import org.hibernate.envers.RevisionType;
+import org.hibernate.envers.query.criteria.RevisionTypeAuditExpression;
+import org.hibernate.envers.test.AbstractSessionTest;
+import org.hibernate.envers.test.Priority;
+import org.hibernate.envers.test.entities.StrTestEntity;
+import org.hibernate.stat.Statistics;
+import org.junit.Test;
+
+import java.io.File;
+import java.net.URISyntaxException;
+import java.net.URL;
+
+/**
+ * @author Lukasz Antoniak (lukasz dot antoniak at gmail dot com)
+ */
+public class HibernateSecLvlQueryCache extends AbstractSessionTest {
+    @Override
+    protected void initMappings() throws MappingException, URISyntaxException {
+        config.addAnnotatedClass(StrTestEntity.class);
+        config.setProperty(Environment.USE_SECOND_LEVEL_CACHE, "true");
+        config.setProperty(Environment.USE_QUERY_CACHE, "true");
+        config.setProperty(Environment.CACHE_PROVIDER, EhCacheProvider.class.getName());
+        URL cacheURL = Thread.currentThread().getContextClassLoader().getResource("ehCache.xml");
+		config.setProperty(Environment.CACHE_PROVIDER_CONFIG, new File(cacheURL.toURI()).getAbsolutePath());
+        config.setProperty(Environment.GENERATE_STATISTICS, "true");
+    }
+
+    @Test
+    @Priority(10)
+    public void initData() {
+        // Revision 1
+        getSession().getTransaction().begin();
+        StrTestEntity ste = new StrTestEntity("data");
+        getSession().persist(ste);
+        getSession().getTransaction().commit();
+    }
+
+    @Test
+    public void testSecLvlCacheWithRevisionTypeDiskPersistent() {
+        /* Invoking the same query twice for caching purpose. */
+        invokeSampleCacheableQuery();
+        invokeSampleCacheableQuery();
+        
+        assert getQueryCacheStatistics() > 0;
+    }
+
+    private void invokeSampleCacheableQuery() {
+        getAuditReader().createQuery().forEntitiesAtRevision(StrTestEntity.class, 1)
+                                      .add(new RevisionTypeAuditExpression(RevisionType.ADD, "="))
+                                      .setCacheable(true).getResultList();
+    }
+
+    private double getQueryCacheStatistics() {
+        Statistics stats = getSession().getSessionFactory().getStatistics();
+
+        double queryCacheHitCount  = stats.getQueryCacheHitCount();
+        double queryCacheMissCount = stats.getQueryCacheMissCount();
+        double queryCacheHitRatio = queryCacheHitCount / (queryCacheHitCount + queryCacheMissCount);
+
+        return queryCacheHitRatio;
+    }
+}

hibernate-envers/src/test/resources/ehCache.xml

@@ -0,0 +1,7 @@
+<ehcache>
+    <diskStore path="java.io.tmpdir" />
+    <!-- Mandatory persist cached objects to disk (checks whether they are serializable). -->
+    <defaultCache eternal="false" diskPersistent="true"
+                  maxElementsInMemory="1" maxElementsOnDisk="10000" overflowToDisk="true"
+                  timeToIdleSeconds="3600" timeToLiveSeconds="3600" />
+</ehcache>