content: /*
   * This library is part of OpenCms -
   * the Open Source Content Management System
   *
   * Copyright (c) Alkacon Software GmbH & Co. KG (https://www.alkacon.com)
   *
   * This library 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 2.1 of the License, or (at your option) any later version.
   *
   * This library 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.
   *
   * For further information about Alkacon Software, please see the
   * company website: https://www.alkacon.com
   *
   * For further information about OpenCms, please see the
   * project website: https://www.opencms.org
   *
   * You should have received a copy of the GNU Lesser General Public
   * License along with this library; if not, write to the Free Software
   * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
   */
  
  package org.opencms.ade.upload;
  
  import org.opencms.util.CmsUUID;
  
  import java.util.concurrent.TimeUnit;
  
  import com.google.common.cache.Cache;
  import com.google.common.cache.CacheBuilder;
  
  /**
   * A table to temporarily store warnings that should be displayed for uploaded files.
   *
   * <p>Warning messages are automatically removed from the table after some time.
   */
  public class CmsUploadWarningTable {
  
      /** The internal cache. */
      private Cache<CmsUUID, String> m_cache;
  
      /**
       * Creates a new instance.
       */
      public CmsUploadWarningTable() {
  
          m_cache = CacheBuilder.<CmsUUID, String> newBuilder().concurrencyLevel(2).expireAfterWrite(
              12,
              TimeUnit.HOURS).build();
  
      }
  
      /**
       * Clears the table.
       */
      public void clear() {
  
          m_cache.invalidateAll();
      }
  
      /**
       * Gets the warning message for the given structure id.
       *
       * @param id a resource structure id
       * @return the warning message (or null if there is no message)
       */
      public String getMessage(CmsUUID id) {
  
          return m_cache.getIfPresent(id);
      }
  
      /**
       * Sets the warning message for the given structure id (or clears it, if the message isn null).
       *
       * @param id the structure id of a resource
       * @param message the message to store
       */
      public void setMessage(CmsUUID id, String message) {
  
          if (message != null) {
              m_cache.put(id, message);
          } else {
              m_cache.invalidate(id);
          }
      }
  
      /**
       * Gets the size of the table.
       *
       * @return the size
       */
      public long size() {
  
          return m_cache.size();
      }
  
  }
  