/**
    * This file Copyright (c) 2017 Magnolia International
    * Ltd.  (http://www.magnolia-cms.com). All rights reserved.
    *
    *
    * This file is dual-licensed under both the Magnolia
    * Network Agreement and the GNU General Public License.
    * You may elect to use one or the other of these licenses.
    *
   * This file is distributed in the hope that it will be
   * useful, but AS-IS and WITHOUT ANY WARRANTY; without even the
   * implied warranty of MERCHANTABILITY or FITNESS FOR A
   * PARTICULAR PURPOSE, TITLE, or NONINFRINGEMENT.
   * Redistribution, except as permitted by whichever of the GPL
   * or MNA you select, is prohibited.
   *
   * 1. For the GPL license (GPL), you can redistribute and/or
   * modify this file under the terms of the GNU General
   * Public License, Version 3, as published by the Free Software
   * Foundation.  You should have received a copy of the GNU
   * General Public License, Version 3 along with this program;
   * if not, write to the Free Software Foundation, Inc., 51
   * Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
   *
   * 2. For the Magnolia Network Agreement (MNA), this file
   * and the accompanying materials are made available under the
   * terms of the MNA which accompanies this distribution, and
   * is available at http://www.magnolia-cms.com/mna.html
   *
   * Any modifications to this file must keep this entire header
   * intact.
   *
   */
  package info.magnolia.module.cache.setup;
  
  import info.magnolia.jcr.util.NodeTypes;
  import info.magnolia.jcr.util.NodeUtil;
  import info.magnolia.module.InstallContext;
  import info.magnolia.module.cache.CacheFactory;
  import info.magnolia.module.delta.AbstractRepositoryTask;
  import info.magnolia.module.delta.TaskExecutionException;
  
  import javax.jcr.Node;
  import javax.jcr.Property;
  import javax.jcr.RepositoryException;
  
  /**
   * Migrates Ehcache 1.5 config to Ehcache 2.x.
   */
  public class MigrateEhcache15ConfigurationTask extends AbstractRepositoryTask {
  
      private static final String EHCACHE_FACTORY_NODE = "modules/cache/config/cacheFactory/delegateFactories/ehcache/";
  
      public MigrateEhcache15ConfigurationTask() {
          super("EhCache persistence settings", "");
      }
  
      @Override
      protected void doExecute(InstallContext ctx) throws RepositoryException, TaskExecutionException {
          final Node factory = ctx.getConfigJCRSession().getRootNode().getNode(EHCACHE_FACTORY_NODE);
          final Node defaultCacheConfiguration = factory.getNode("defaultCacheConfiguration");
          final Node caches = factory.addNode("caches", NodeTypes.ContentNode.NAME);
          NodeUtil.renameNode(defaultCacheConfiguration, CacheFactory.DEFAULT_CACHE_NAME);
          NodeUtil.moveNode(defaultCacheConfiguration, caches);
  
          final Node persistence = defaultCacheConfiguration.addNode("persistence", NodeTypes.ContentNode.NAME);
          persistence.setProperty("synchronousWrites", "false");
          final boolean overflowToDisk = getBooleanAndRemove(defaultCacheConfiguration, "overflowToDisk", true);
          final boolean diskPersistent = getBooleanAndRemove(defaultCacheConfiguration, "diskPersistent", true);
          if (overflowToDisk && diskPersistent) {
              persistence.setProperty("strategy", "localTempSwap");
              ctx.warn("EhCache: needs ehcache enterprise edition / BigMemory for persistence. Disabling persistance for the time beeing.");
          } else if (overflowToDisk) {
              persistence.setProperty("strategy", "localTempSwap");
          } else {
              ctx.warn("EhCache: overflowToDisk or diskPersistent was set to false, so we'll set the persistent strategy to 'none'");
              persistence.setProperty("strategy", "none");
          }
      }
  
      private boolean getBooleanAndRemove(Node node, String propertyName, boolean defaultValue) throws RepositoryException {
          if (node.hasProperty(propertyName)) {
              final Property property = node.getProperty(propertyName);
              final boolean val = property.getBoolean();
              property.remove();
              return val;
          }
          return defaultValue;
      }
  }