Merged HEAD-BUG-FIX (5.0/Cloud) to HEAD (5.0/Cloud)

84033: Merged V4.2-BUG-FIX (4.2.4) to HEAD-BUG-FIX (5.0/Cloud)
      83385: MNT-12297: TransactionalCache equality checks lead to false negatives in a cluster
       - TransactionalCache uses ValueHolder to store values put into the cache.
       - Each ValueHolder will have a new random integer to distinguish it from the next
       - TransactionalCache equality checks no longer use reference equality and instead
         use the ValueHolder.equals() method for most cases.  This actual client value
         .equals() is used where 'allowEquals' is true.
       - Immutable caches always assume the backing cache is correct, still.
      83391: Fix test doing checks in low-level cache (r83385 MNT-12297)


git-svn-id: https://svn.alfresco.com/repos/alfresco-enterprise/alfresco/HEAD/root@84621 c4b6b30b-aa2e-2d43-bbcb-ca4b014f7261

source/test-java/org/alfresco/repo/cache/SerializingSimpleCache.java

@@ -0,0 +1,124 @@
+/*
+ * Copyright (C) 2005-2014 Alfresco Software Limited.
+ *
+ * This file is part of Alfresco
+ *
+ * Alfresco is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * Alfresco is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with Alfresco. If not, see <http://www.gnu.org/licenses/>.
+ */
+package org.alfresco.repo.cache;
+
+import java.io.ByteArrayInputStream;
+import java.io.ByteArrayOutputStream;
+import java.io.ObjectInputStream;
+import java.io.ObjectOutputStream;
+import java.io.Serializable;
+import java.util.Collection;
+
+import org.springframework.beans.factory.BeanNameAware;
+
+/**
+ * {@link SimpleCache} implementation backed by a {@link DefaultSimpleCache} but forcing
+ * object serialization in and out.  This is only useful for tests.
+ * 
+ * @author Derek Hulley
+ * @since 4.2.3
+ */
+public final class SerializingSimpleCache<K extends Serializable, V extends Serializable>
+    implements SimpleCache<K, V>, BeanNameAware
+{
+    private SimpleCache<K, V> cache;
+    
+    public SerializingSimpleCache(int maxItems, String cacheName)
+    {
+        cache = new DefaultSimpleCache<>(maxItems, cacheName);
+    }
+    
+    public SerializingSimpleCache()
+    {
+        cache = new DefaultSimpleCache<>();
+    }
+    
+    @SuppressWarnings("unchecked")
+    private V serialize(V value)
+    {
+        if (value == null)
+        {
+            return null;
+        }
+        try
+        {
+            ByteArrayOutputStream bos = new ByteArrayOutputStream();
+            ObjectOutputStream oos = new ObjectOutputStream(bos);
+            oos.writeObject(value);
+            byte[] bytes = bos.toByteArray();
+            ByteArrayInputStream bis = new ByteArrayInputStream(bytes);
+            ObjectInputStream ois = new ObjectInputStream(bis);
+            V ret = (V) ois.readObject();
+            // This is just test code!
+            bos.close();
+            oos.close();
+            bis.close();
+            ois.close();
+            // Done
+            return ret;
+        }
+        catch (Exception e)
+        {
+            throw new RuntimeException("Failure to serialize/deserialize object: " + value, e);
+        }
+    }
+    
+    @Override
+    public boolean contains(K key)
+    {
+        return cache.contains(key);
+    }
+
+    @Override
+    public Collection<K> getKeys()
+    {
+        return cache.getKeys();
+    }
+
+    @Override
+    public V get(K key)
+    {
+        V ret = cache.get(key);
+        return serialize(ret);
+    }
+
+    @Override
+    public void put(K key, V value)
+    {
+        value = serialize(value);
+        cache.put(key, value);
+    }
+
+    @Override
+    public void remove(K key)
+    {
+        cache.remove(key);
+    }
+
+    @Override
+    public void clear()
+    {
+        cache.clear();
+    }
+
+    @Override
+    public void setBeanName(String cacheName)
+    {
+    }
+}