Merged PATCHES/V4.1.3 to HEAD

45612: Fix for ALF-17456 	 BM-0013: SOAK01_04: 150K+ calls to AuthorityDaoImpl.isAuthorityContained in on login
    45648: Final part for     ALF-17456 BM-0013: SOAK01_04: 150K+ calls to AuthorityDaoImpl.isAuthorityContained in on login 
    46033: Build fixes


git-svn-id: https://svn.alfresco.com/repos/alfresco-enterprise/alfresco/HEAD/root@47861 c4b6b30b-aa2e-2d43-bbcb-ca4b014f7261

source/java/org/alfresco/repo/cache/RefreshableCache.java

@@ -0,0 +1,51 @@
+/*
+ * Copyright (C) 2005-2013 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;
+
+/**
+ * Basic cache API
+ * 
+ * @author Andy
+ *
+ */
+public interface RefreshableCache <T> 
+{
+    /**
+     * Get the cache.
+     * If there is no cache value this call will block.
+     * If the underlying cache is being refreshed, the old cache value will be returned until the refresh is complete.
+     * 
+     * @return
+     */
+    public T get();
+    
+    /**
+     * Refresh the cache asynchronously.
+     */
+    public void refresh();
+
+    /**
+     * Register to be informed when the cache is updated in the background.
+     * 
+     * Note: it is up to the implementation to provide any transactional wrapping.
+     * Transactional wrapping is not required to invalidate a shared cache entry directly via a transactional cache 
+     * @param listener
+     */
+    void register(RefreshableCacheListener listener);
+}