# TenantConfig.java

    /*
    ** Module   : TenantConfig.java
    ** Abstract : Class that stores multi-tenancy configuration information
    **
    ** Copyright (c) 2024-2025, Golden Code Development Corporation.
    **
    ** -#- -I- --Date-- ---------------------------------------Description----------------------------------------
    ** 001 RAA 20240423 Created initial version.
    **     RAA 20240702 Removed logging as it was not required here.
    **     RAA 20240710 Added database parameter to initialize.
    **     RAA 20240717 Adjusted the way initialization takes place.
    **     RAA 20240719 If landlord database URL is null, honor single-tenant mode.
    **     RAA 20240723 Surrounded landlordURL initialization with try-finally block.
    **     RAA 20240807 Split initialization method into two: enable and initialize.
    ** 002 OM  20250116 Added support for additional dialects for landlord database.
    ** 003 OM  20250320 Added isActive() method.
    */

    /*
    ** This program is free software: you can redistribute it and/or modify
    ** it under the terms of the GNU Affero General Public License as
    ** published by the Free Software Foundation, either version 3 of the
    ** License, or (at your option) any later version.
    **
    ** This program 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 Affero General Public License for more details.
    **
    ** You may find a copy of the GNU Affero GPL version 3 at the following
    ** location: https://www.gnu.org/licenses/agpl-3.0.en.html
    **
    ** Additional terms under GNU Affero GPL version 3 section 7:
    **
    **   Under Section 7 of the GNU Affero GPL version 3, the following additional
    **   terms apply to the works covered under the License.  These additional terms
    **   are non-permissive additional terms allowed under Section 7 of the GNU
    **   Affero GPL version 3 and may not be removed by you.
    **
    **   0. Attribution Requirement.
    **
    **     You must preserve all legal notices or author attributions in the covered
    **     work or Appropriate Legal Notices displayed by works containing the covered
    **     work.  You may not remove from the covered work any author or developer
    **     credit already included within the covered work.
    **
    **   1. No License To Use Trademarks.
    **
    **     This license does not grant any license or rights to use the trademarks
    **     Golden Code, FWD, any Golden Code or FWD logo, or any other trademarks
    **     of Golden Code Development Corporation. You are not authorized to use the
    **     name Golden Code, FWD, or the names of any author or contributor, for
    **     publicity purposes without written authorization.
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    **   2. No Misrepresentation of Affiliation.
    **
    **     You may not represent yourself as Golden Code Development Corporation or FWD.
    **
    **     You may not represent yourself for publicity purposes as associated with
    **     Golden Code Development Corporation, FWD, or any author or contributor to
    **     the covered work, without written authorization.
    **
    **   3. No Misrepresentation of Source or Origin.
    **
    **     You may not represent the covered work as solely your work.  All modified
    **     versions of the covered work must be marked in a reasonable way to make it
    **     clear that the modified work is not originating from Golden Code Development
    **     Corporation or FWD.  All modified versions must contain the notices of
    **     attribution required in this license.
    */

    package com.goldencode.p2j.persist.orm;

    import com.goldencode.p2j.directory.DirectoryService;
    import com.goldencode.p2j.util.Utils;

    /**
     * Class that stores information regarding the multi-tenancy configuration.
     */
    public class TenantConfig
    {
       /** Flag that denotes if multi-tenancy configuration has already been initialized. */
       private static boolean alreadyInitialized = false;

       /** Flag that denotes if multi-tenancy is enabled. */
       private static boolean enabled = false;

       /** The JDBC URL to the landlord database. */
       private static String landlordURL = null;

       /** The JDBC User for access to the landlord database. */
       private static String landlordUser = null;

       /** The JDBC Password for access to the landlord database. */
       private static String landlordPassword = null;

       /**
        * Default constructor.
        */
       public TenantConfig()
       {
       }

       /**
        * Enable the support for multi-tenancy. This involves gathering from the directory the URL
        * of the landlord database.
        */
       public static void enableMultiTenancy()
       {
          if (alreadyInitialized)
          {
             return;
          }

          DirectoryService ds = DirectoryService.getInstance();
          if (!ds.bind())
          {
             throw new RuntimeException("Directory bind failed");
          }

          try
          {
             landlordURL = Utils.getDirectoryNodeString(ds, "persistence/landlord_database_url", null, false);
             if (landlordURL != null)
             {
                landlordUser =
                      Utils.getDirectoryNodeString(ds, "persistence/landlord_database_user", null, false);
                landlordPassword =
                      Utils.getDirectoryNodeString(ds, "persistence/landlord_database_password", null, false);
             }
          }
          finally
          {
             ds.unbind();
          }

          alreadyInitialized = true;
          if (landlordURL == null)
          {
             return;
          }

          TenantManager.enable();
          enabled = true;
       }

       /**
        * Initialize the required components of multi-tenancy.
        */
       public static void initialize()
       {
          if (!enabled)
          {
             return;
          }

          TenantManager.initialize(landlordURL, landlordUser, landlordPassword);
       }

       /**
        * Getter for the {@code enabled} field.
        *
        * @return  {@code true} if multi-tenancy is enabled, {@code false} otherwise.
        */
       public static boolean isEnabled()
       {
          return enabled;
       }

       /**
        * Check whether the multi-tenancy is active..
        *
        * @return  {@code true} if multi-tenancy is active, {@code false} otherwise.
        */
       public static boolean isActive()
       {
          return landlordURL != null;
       }
    }