content: /*
   * Copyright (c) 2015, 2021, 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;
  
  import java.net.SocketAddress;
  
  import com.mysql.cj.conf.HostInfo;
  import com.mysql.cj.conf.PropertyKey;
  import com.mysql.cj.conf.PropertySet;
  import com.mysql.cj.conf.RuntimeProperty;
  import com.mysql.cj.exceptions.CJOperationNotSupportedException;
  import com.mysql.cj.exceptions.ExceptionFactory;
  import com.mysql.cj.exceptions.ExceptionInterceptor;
  import com.mysql.cj.log.Log;
  import com.mysql.cj.log.LogFactory;
  import com.mysql.cj.log.NullLogger;
  import com.mysql.cj.log.ProfilerEventHandler;
  import com.mysql.cj.protocol.Message;
  import com.mysql.cj.protocol.Protocol;
  import com.mysql.cj.protocol.ServerSession;
  import com.mysql.cj.util.Util;
  
  public abstract class CoreSession implements Session {
  
      protected PropertySet propertySet;
      protected ExceptionInterceptor exceptionInterceptor;
  
      /** The logger we're going to use */
      protected transient Log log;
  
      /** Null logger shared by all connections at startup */
      protected static final Log NULL_LOGGER = new NullLogger(Log.LOGGER_INSTANCE_NAME);
  
      protected transient Protocol<? extends Message> protocol;
      protected MessageBuilder<? extends Message> messageBuilder;
  
      /** The point in time when this connection was created */
      protected long connectionCreationTimeMillis = 0;
      protected HostInfo hostInfo = null;
  
      protected RuntimeProperty<Boolean> gatherPerfMetrics;
      protected RuntimeProperty<String> characterEncoding;
      protected RuntimeProperty<Boolean> disconnectOnExpiredPasswords;
      protected RuntimeProperty<Boolean> cacheServerConfiguration;
      protected RuntimeProperty<Boolean> autoReconnect;
      protected RuntimeProperty<Boolean> autoReconnectForPools;
      protected RuntimeProperty<Boolean> maintainTimeStats;
  
      /** The max-rows setting for current session */
      protected int sessionMaxRows = -1;
  
      /** The event sink to use for profiling */
      private ProfilerEventHandler eventSink;
  
      public CoreSession(HostInfo hostInfo, PropertySet propSet) {
          this.connectionCreationTimeMillis = System.currentTimeMillis();
          this.hostInfo = hostInfo;
          this.propertySet = propSet;
  
          this.gatherPerfMetrics = getPropertySet().getBooleanProperty(PropertyKey.gatherPerfMetrics);
          this.characterEncoding = getPropertySet().getStringProperty(PropertyKey.characterEncoding);
          this.disconnectOnExpiredPasswords = getPropertySet().getBooleanProperty(PropertyKey.disconnectOnExpiredPasswords);
          this.cacheServerConfiguration = getPropertySet().getBooleanProperty(PropertyKey.cacheServerConfiguration);
          this.autoReconnect = getPropertySet().getBooleanProperty(PropertyKey.autoReconnect);
          this.autoReconnectForPools = getPropertySet().getBooleanProperty(PropertyKey.autoReconnectForPools);
          this.maintainTimeStats = getPropertySet().getBooleanProperty(PropertyKey.maintainTimeStats);
  
          this.log = LogFactory.getLogger(getPropertySet().getStringProperty(PropertyKey.logger).getStringValue(), Log.LOGGER_INSTANCE_NAME);
      }
  
      @Override
      public void changeUser(String user, String password, String database) {
          // reset maxRows to default value
          this.sessionMaxRows = -1;
  
          this.protocol.changeUser(user, password, database);
      }
  
      @Override
      public PropertySet getPropertySet() {
          return this.propertySet;
      }
  
      @Override
      public ExceptionInterceptor getExceptionInterceptor() {
          return this.exceptionInterceptor;
      }
  
      @Override
      public void setExceptionInterceptor(ExceptionInterceptor exceptionInterceptor) {
          this.exceptionInterceptor = exceptionInterceptor;
      }
  
      @Override
      public Log getLog() {
          return this.log;
      }
  
      public HostInfo getHostInfo() {
          return this.hostInfo;
      }
  
      @SuppressWarnings("unchecked")
      @Override
      public <M extends Message> MessageBuilder<M> getMessageBuilder() {
          return (MessageBuilder<M>) this.messageBuilder;
      }
  
      @Override
      public ServerSession getServerSession() {
          return this.protocol.getServerSession();
      }
  
      @Override
      public boolean versionMeetsMinimum(int major, int minor, int subminor) {
          return this.protocol.versionMeetsMinimum(major, minor, subminor);
      }
  
      @Override
      public long getThreadId() {
          return this.protocol.getServerSession().getCapabilities().getThreadId();
      }
  
      @Override
      public void quit() {
          if (this.eventSink != null) {
              this.eventSink.destroy();
              this.eventSink = null;
          }
      }
  
      @Override
      public void forceClose() {
          if (this.eventSink != null) {
              this.eventSink.destroy();
              this.eventSink = null;
          }
      }
  
      public boolean isSetNeededForAutoCommitMode(boolean autoCommitFlag) {
          throw ExceptionFactory.createException(CJOperationNotSupportedException.class, "Not supported");
      }
  
      @Override
      public ProfilerEventHandler getProfilerEventHandler() {
          if (this.eventSink == null) {
              synchronized (this) {
                  if (this.eventSink == null) { // check again to ensure that other thread didn't set it already
                      this.eventSink = (ProfilerEventHandler) Util.getInstance(
                              this.propertySet.getStringProperty(PropertyKey.profilerEventHandler).getStringValue(), new Class<?>[0], new Object[0],
                              this.exceptionInterceptor);
  
                      this.eventSink.init(this.log);
                  }
              }
          }
          return this.eventSink;
      }
  
      @Override
      public boolean isSSLEstablished() {
          throw ExceptionFactory.createException(CJOperationNotSupportedException.class, "Not supported");
      }
  
      @Override
      public SocketAddress getRemoteSocketAddress() {
          throw ExceptionFactory.createException(CJOperationNotSupportedException.class, "Not supported");
      }
  
      @Override
      public void addListener(SessionEventListener l) {
          throw ExceptionFactory.createException(CJOperationNotSupportedException.class, "Not supported");
      }
  
      @Override
      public void removeListener(SessionEventListener l) {
          throw ExceptionFactory.createException(CJOperationNotSupportedException.class, "Not supported");
      }
  
      @Override
      public String getIdentifierQuoteString() {
          throw ExceptionFactory.createException(CJOperationNotSupportedException.class, "Not supported");
      }
  
      @Override
      public DataStoreMetadata getDataStoreMetadata() {
          return new DataStoreMetadataImpl(this);
      }
  
      @Override
      public String getQueryTimingUnits() {
          return this.protocol.getQueryTimingUnits();
      }
  }
  