content: /*
   * Copyright (c) 2015, 2020, Oracle and/or its affiliates.
   *
   * This program is free software; you can redistribute it and/or modify it under
   * the terms of the GNU General Public License, version 2.0, as published by the
   * Free Software Foundation.
   *
   * This program is also distributed with certain software (including but not
   * limited to OpenSSL) that is licensed under separate terms, as designated in a
   * particular file or component or in included license documentation. The
   * authors of MySQL hereby grant you an additional permission to link the
   * program and your derivative works with the separately licensed software that
   * they have included with MySQL.
   *
   * Without limiting anything contained in the foregoing, this file, which is
   * part of MySQL Connector/J, is also subject to the Universal FOSS Exception,
   * version 1.0, a copy of which can be found at
   * http://oss.oracle.com/licenses/universal-foss-exception.
   *
   * 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 General Public License, version 2.0,
   * for more details.
   *
   * You should have received a copy of the GNU General Public License along with
   * this program; if not, write to the Free Software Foundation, Inc.,
   * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301  USA
   */
  
  package com.mysql.cj.xdevapi;
  
  import java.util.List;
  import java.util.Properties;
  
  import com.mysql.cj.Messages;
  import com.mysql.cj.conf.ConnectionUrl;
  import com.mysql.cj.conf.HostInfo;
  import com.mysql.cj.conf.PropertyDefinitions;
  import com.mysql.cj.conf.PropertyKey;
  import com.mysql.cj.exceptions.CJCommunicationsException;
  import com.mysql.cj.exceptions.CJException;
  import com.mysql.cj.exceptions.ExceptionFactory;
  import com.mysql.cj.exceptions.InvalidConnectionAttributeException;
  
  /**
   * SessionFactory is used for creation of sessions.
   * 
   * <pre>
   * SessionFactory xFactory = new SessionFactory();
   * 
   * {@link Session} session1 = xFactory.getSession("<b>mysqlx:</b>//[user1[:pwd1]@]host1[:port1]/db");
   * {@link Session} session2 = xFactory.getSession("<b>mysqlx:</b>//host2[:port2]/db?user=user2&amp;password=pwd2");
   * {@link Session} session3 = xFactory.getSession("<b>mysqlx+srv:</b>//[user1[:pwd1]@]service_name/db");
   * </pre>
   *
   */
  public class SessionFactory {
      /**
       * Parses the connection string URL.
       * 
       * @param url
       *            the connection string URL.
       * @return a {@link ConnectionUrl} instance containing the URL components.
       */
      protected ConnectionUrl parseUrl(String url) {
          ConnectionUrl connUrl = ConnectionUrl.getConnectionUrlInstance(url, null);
          if (connUrl == null || (connUrl.getType() != ConnectionUrl.Type.XDEVAPI_SESSION && connUrl.getType() != ConnectionUrl.Type.XDEVAPI_DNS_SRV_SESSION)) {
              throw ExceptionFactory.createException(InvalidConnectionAttributeException.class, "Initialization via URL failed for \"" + url + "\"");
          }
          return connUrl;
      }
  
      /**
       * Creates {@link Session} by given URL.
       * 
       * @param connUrl
       *            the session {@link ConnectionUrl}.
       * @return a {@link Session} instance.
       */
      protected Session getSession(ConnectionUrl connUrl) {
          CJException latestException = null;
          List<HostInfo> hostsList = connUrl.getHostsList();
          for (HostInfo hi : hostsList) {
              try {
                  return new SessionImpl(hi);
              } catch (CJCommunicationsException e) {
                  if (e.getCause() == null) {
                      throw e;
                  }
                  latestException = e;
              }
          }
          if (latestException != null) {
              throw ExceptionFactory.createException(CJCommunicationsException.class, Messages.getString("Session.Create.Failover.0"), latestException);
          }
          return null;
      }
  
      /**
       * Creates {@link Session} by given URL.
       * 
       * @param url
       *            the session URL.
       * @return a {@link Session} instance.
       */
      public Session getSession(String url) {
          return getSession(parseUrl(url));
      }
  
      /**
       * Creates a {@link Session} using the information contained in the given properties.
       * 
       * @param properties
       *            the {@link Properties} instance that contains the session components.
       * @return a {@link Session} instance.
       */
      public Session getSession(Properties properties) {
  
          if (properties.containsKey(PropertyKey.xdevapiDnsSrv.getKeyName()) && (Boolean) PropertyDefinitions.getPropertyDefinition(PropertyKey.xdevapiDnsSrv)
                  .parseObject(properties.getProperty(PropertyKey.xdevapiDnsSrv.getKeyName()), null)) {
  
              ConnectionUrl connUrl = ConnectionUrl.getConnectionUrlInstance(ConnectionUrl.Type.XDEVAPI_DNS_SRV_SESSION.getScheme(), properties);
              return getSession(connUrl);
          }
  
          ConnectionUrl connUrl = ConnectionUrl.getConnectionUrlInstance(ConnectionUrl.Type.XDEVAPI_SESSION.getScheme(), properties);
          return new SessionImpl(connUrl.getMainHost());
      }
  }
  