/*
 * CDDL HEADER START
 *
 * The contents of this file are subject to the terms of the
 * Common Development and Distribution License, Version 1.0 only
 * (the "License").  You may not use this file except in compliance
 * with the License.
 *
 * You can obtain a copy of the license at
 * trunk/opends/resource/legal-notices/OpenDS.LICENSE
 * or https://OpenDS.dev.java.net/OpenDS.LICENSE.
 * See the License for the specific language governing permissions
 * and limitations under the License.
 *
 * When distributing Covered Code, include this CDDL HEADER in each
 * file and include the License file at
 * trunk/opends/resource/legal-notices/OpenDS.LICENSE.  If applicable,
 * add the following below this CDDL HEADER, with the fields enclosed
 * by brackets "[]" replaced with your own identifying information:
 *      Portions Copyright [yyyy] [name of copyright owner]
 *
 * CDDL HEADER END
 *
 *
 *      Copyright 2008 Sun Microsystems, Inc.
 */
package org.opends.server.util;



import org.opends.server.config.ConfigException;
import org.opends.server.core.DirectoryServer;
import org.opends.server.types.DirectoryEnvironmentConfig;
import org.opends.server.types.InitializationException;

import static org.opends.messages.UtilityMessages.*;
import org.opends.messages.Message;



/**
 * This class provides a number of utility methods for using OpenDS in an
 * embedded manner (i.e., running within the same JVM as another application and
 * controlled by that application).
 */
@org.opends.server.types.PublicAPI(
     stability=org.opends.server.types.StabilityLevel.UNCOMMITTED,
     mayInstantiate=false,
     mayExtend=false,
     mayInvoke=true)
public final class EmbeddedUtils
{
  /**
   * Indicates whether the Directory Server is currently running.
   *
   * @return  {@code true} if the server is currently running, or {@code false}
   *          if not.
   */
  public static boolean isRunning()
  {
    return DirectoryServer.isRunning();
  }



  /**
   * Attempts to start the Directory Server.
   *
   * @param  config  The environment configuration to use for the server.
   *
   * @throws  ConfigException  If a configuration problem is detected during
   *                           the server initialization or startup process.
   *
   * @throws  InitializationException  If the Directory Server is already
   *                                   running, or if an error occurs during
   *                                   server initialization or startup.
   */
  public static void startServer(DirectoryEnvironmentConfig config)
         throws ConfigException, InitializationException
  {
    if (DirectoryServer.isRunning())
    {
      throw new InitializationException(
              ERR_EMBEDUTILS_SERVER_ALREADY_RUNNING.get());
    }

    DirectoryServer directoryServer = DirectoryServer.reinitialize(config);
    directoryServer.startServer();
  }



  /**
   * Attempts to stop the Directory Server.
   *
   * @param  className  The name of the class that initiated the shutdown.
   * @param  reason     A message explaining the reason for the shutdown.
   */
  public static void stopServer(String className, Message reason)
  {
    DirectoryServer.shutDown(className, reason);
  }



  /**
   * Attempts to restart the Directory Server.  This will perform an in-core
   * restart in which the existing server instance will be shut down, a new
   * instance will be created, and it will be reinitialized and restarted.
   *
   * @param  className  The name of the class that initiated the restart.
   * @param  reason     A message explaining the reason for the retart.
   * @param  config     The environment configuration to use for the new server
   *                    instance.
   */
  public static void restartServer(String className, Message reason,
                                   DirectoryEnvironmentConfig config)
  {
    DirectoryServer.restart(className, reason, config);
  }



  /**
   * Sets up a number of internal server data structures to ensure that they are
   * properly initialized for use.  This is necessary if server libraries are
   * going to be used without the server running (e.g., to facilitate use in an
   * LDAP client API, for DN processing, etc.).  This will have no effect if the
   * server has already been initialized for client use.
   */
  public static void initializeForClientUse()
  {
    DirectoryServer directoryServer = DirectoryServer.getInstance();
    DirectoryServer.bootstrapClient();
  }
}