[HHH-4836] (Infinispan: 2L QueryCache don't considers cached queries which belong to current transaction) Fixed by not suspending transactions on get any more, since no locks are aquired on get.

git-svn-id: https://svn.jboss.org/repos/hibernate/core/trunk@18790 1b8cb986-b30d-0410-93ca-fae66ebed9b2

cache-infinispan/src/main/java/org/hibernate/cache/infinispan/impl/BaseRegion.java

@@ -194,9 +194,7 @@ public abstract class BaseRegion implements Region {
    }
 
    /**
-    * Performs a JBoss Cache <code>get(Fqn, Object)</code> after first
+    * Performs a Infinispan <code>get(Fqn, Object)</code>
-    * {@link #suspend suspending any ongoing transaction}. Wraps any exception
-    * in a {@link CacheException}. Ensures any ongoing transaction is resumed.
     *
     * @param key The key of the item to get
     * @param opt any option to add to the get invocation. May be <code>null</code>
@@ -204,16 +202,11 @@ public abstract class BaseRegion implements Region {
     * @return The retrieved object
       * @throws CacheException issue managing transaction or talking to cache
     */
-   protected Object suspendAndGet(Object key, FlagAdapter opt, boolean suppressTimeout) throws CacheException {
+   protected Object get(Object key, FlagAdapter opt, boolean suppressTimeout) throws CacheException {
-       Transaction tx = suspend();
-       try {
       if (suppressTimeout)
          return cacheAdapter.getAllowingTimeout(key);
       else
          return cacheAdapter.get(key);
-       } finally {
-           resume(tx);
-       }
    }
    
    public Object getOwnerForPut() {

cache-infinispan/src/main/java/org/hibernate/cache/infinispan/query/QueryResultsRegionImpl.java

@@ -50,11 +50,12 @@ public class QueryResultsRegionImpl extends BaseTransactionalDataRegion implemen
       if (!checkValid())
          return null;
 
-      // Don't hold the JBC node lock throughout the tx, as that
+      // In Infinispan get doesn't acquire any locks, so no need to suspend the tx.
-      // prevents updates
+      // In the past, when get operations acquired locks, suspending the tx was a way
+      // to avoid holding locks that would prevent updates.
       // Add a zero (or low) timeout option so we don't block
       // waiting for tx's that did a put to commit
-      return suspendAndGet(key, FlagAdapter.ZERO_LOCK_ACQUISITION_TIMEOUT, true);
+      return get(key, FlagAdapter.ZERO_LOCK_ACQUISITION_TIMEOUT, true);
    }   
 
    public void put(Object key, Object value) throws CacheException {

cache-infinispan/src/main/java/org/hibernate/cache/infinispan/timestamp/TimestampsRegionImpl.java

@@ -58,7 +58,7 @@ public class TimestampsRegionImpl extends BaseGeneralDataRegion implements Times
    public Object get(Object key) throws CacheException {
       Object value = localCache.get(key);
       if (value == null && checkValid()) {
-         value = suspendAndGet(key, null, false);
+         value = get(key, null, false);
          if (value != null)
             localCache.put(key, value);
       }

cache-infinispan/src/test/java/org/hibernate/test/cache/infinispan/functional/BasicTransactionalTestCase.java

@@ -287,4 +287,47 @@ public class BasicTransactionalTestCase extends SingleNodeTestCase {
          commitOrRollbackTx();
       }
    }
+
+   public void testQueryCacheHitInSameTransaction() throws Exception {
+      Session s = null;
+      Item item = new Item("galder", "Galder's Item");
+
+      beginTx();
+      try {
+         s = openSession();
+         s.getTransaction().begin();
+         s.persist(item);
+         s.getTransaction().commit();
+         s.close();
+      } catch (Exception e) {
+         setRollbackOnlyTx(e);
+      } finally {
+         commitOrRollbackTx();
+      }
+
+      beginTx();
+      try {
+         s = openSession();
+         Statistics stats = s.getSessionFactory().getStatistics();
+         s.createQuery("from Item").setCacheable(true).list();
+         s.createQuery("from Item").setCacheable(true).list();
+         assertEquals(1, stats.getQueryCacheHitCount());
+         s.close();
+      } catch (Exception e) {
+         setRollbackOnlyTx(e);
+      } finally {
+         commitOrRollbackTx();
+      }
+
+      beginTx();
+      try {
+         s = openSession();
+         s.createQuery("delete from Item").executeUpdate();
+         s.close();
+      } catch (Exception e) {
+         setRollbackOnlyTx(e);
+      } finally {
+         commitOrRollbackTx();
+      }
+   }   
 }