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 GmbH & Co. KG, 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.db.oracle;
  
  import org.opencms.db.CmsDbContext;
  import org.opencms.db.CmsDbEntryNotFoundException;
  import org.opencms.db.CmsDbIoException;
  import org.opencms.db.CmsDbSqlException;
  import org.opencms.db.generic.CmsSqlManager;
  import org.opencms.db.generic.Messages;
  import org.opencms.file.CmsDataAccessException;
  import org.opencms.file.CmsProject;
  import org.opencms.main.OpenCms;
  import org.opencms.util.CmsUUID;
  
  import java.io.IOException;
  import java.io.OutputStream;
  import java.sql.Connection;
  import java.sql.PreparedStatement;
  import java.sql.ResultSet;
  import java.sql.SQLException;
  
  /**
   * Oracle implementation of the VFS driver methods.<p>
   *
   * @since 6.0.0
   */
  public class CmsVfsDriver extends org.opencms.db.generic.CmsVfsDriver {
  
      /**
       * @see org.opencms.db.I_CmsVfsDriver#createContent(CmsDbContext, CmsUUID, CmsUUID, byte[])
       */
      @Override
      public void createContent(CmsDbContext dbc, CmsUUID projectId, CmsUUID resourceId, byte[] content)
      throws CmsDataAccessException {
  
          Connection conn = null;
          PreparedStatement stmt = null;
  
          try {
              conn = m_sqlManager.getConnection(dbc);
              stmt = m_sqlManager.getPreparedStatement(conn, projectId, "C_ORACLE_OFFLINE_CONTENTS_WRITE");
  
              // first insert new file without file_content, then update the file_content
              // these two steps are necessary because of using BLOBs in the Oracle DB
              stmt.setString(1, resourceId.toString());
  
              stmt.executeUpdate();
          } catch (SQLException e) {
              throw new CmsDbSqlException(
                  Messages.get().container(Messages.ERR_GENERIC_SQL_1, CmsDbSqlException.getErrorQuery(stmt)),
                  e);
          } finally {
              m_sqlManager.closeAll(dbc, conn, stmt, null);
          }
  
          // now update the file content
          internalWriteContent(dbc, projectId, resourceId, content, -1);
      }
  
      /**
       * @see org.opencms.db.generic.CmsVfsDriver#createOnlineContent(CmsDbContext, CmsUUID, byte[], int, boolean, boolean)
       */
      @Override
      public void createOnlineContent(
          CmsDbContext dbc,
          CmsUUID resourceId,
          byte[] contents,
          int publishTag,
          boolean keepOnline,
          boolean needToUpdateContent)
      throws CmsDataAccessException {
  
          Connection conn = null;
          PreparedStatement stmt = null;
  
          try {
              conn = m_sqlManager.getConnection(dbc);
              boolean dbcHasProjectId = (dbc.getProjectId() != null) && !dbc.getProjectId().isNullUUID();
              if (needToUpdateContent || dbcHasProjectId) {
                  if (dbcHasProjectId || !OpenCms.getSystemInfo().isHistoryEnabled()) {
                      // remove the online content for this resource id
                      stmt = m_sqlManager.getPreparedStatement(conn, "C_ONLINE_CONTENTS_DELETE");
                      stmt.setString(1, resourceId.toString());
                      stmt.executeUpdate();
                      m_sqlManager.closeAll(dbc, null, stmt, null);
                  } else {
                      // put the online content in the history
                      stmt = m_sqlManager.getPreparedStatement(conn, "C_ONLINE_CONTENTS_HISTORY");
                      stmt.setString(1, resourceId.toString());
                      stmt.executeUpdate();
                      m_sqlManager.closeAll(dbc, null, stmt, null);
                  }
  
                  // create new empty online content entry
                  stmt = m_sqlManager.getPreparedStatement(conn, "C_ORACLE_ONLINE_CONTENTS_WRITE");
                  stmt.setString(1, resourceId.toString());
                  stmt.setInt(2, publishTag);
                  stmt.setInt(3, publishTag);
                  stmt.setInt(4, keepOnline ? 1 : 0);
                  stmt.executeUpdate();
                  m_sqlManager.closeAll(dbc, conn, stmt, null);
  
                  // now update the file content
                  internalWriteContent(dbc, CmsProject.ONLINE_PROJECT_ID, resourceId, contents, publishTag);
              } else {
                  // update old content entry
                  stmt = m_sqlManager.getPreparedStatement(conn, "C_HISTORY_CONTENTS_UPDATE");
                  stmt.setInt(1, publishTag);
                  stmt.setString(2, resourceId.toString());
                  stmt.executeUpdate();
                  m_sqlManager.closeAll(dbc, null, stmt, null);
  
                  if (!keepOnline) {
                      // put the online content in the history
                      stmt = m_sqlManager.getPreparedStatement(conn, "C_ONLINE_CONTENTS_HISTORY");
                      stmt.setString(1, resourceId.toString());
                      stmt.executeUpdate();
                      m_sqlManager.closeAll(dbc, null, stmt, null);
                  }
              }
          } catch (SQLException e) {
              throw new CmsDbSqlException(
                  Messages.get().container(Messages.ERR_GENERIC_SQL_1, CmsDbSqlException.getErrorQuery(stmt)),
                  e);
          } finally {
              m_sqlManager.closeAll(dbc, conn, stmt, null);
          }
      }
  
      /**
       * @see org.opencms.db.I_CmsVfsDriver#initSqlManager(String)
       */
      @Override
      public org.opencms.db.generic.CmsSqlManager initSqlManager(String classname) {
  
          return CmsSqlManager.getInstance(classname);
      }
  
      /**
       * @see org.opencms.db.I_CmsVfsDriver#writeContent(CmsDbContext, CmsUUID, byte[])
       */
      @Override
      public void writeContent(CmsDbContext dbc, CmsUUID resourceId, byte[] content) throws CmsDataAccessException {
  
          internalWriteContent(dbc, dbc.currentProject().getUuid(), resourceId, content, -1);
      }
  
      /**
       * Writes the resource content with the specified resource id.<p>
       *
       * @param dbc the current database context
       * @param projectId the id of the current project
       * @param resourceId the id of the resource used to identify the content to update
       * @param contents the new content of the file
       * @param publishTag the publish tag if to be written to the online content
       *
       * @throws CmsDataAccessException if something goes wrong
       */
      protected void internalWriteContent(
          CmsDbContext dbc,
          CmsUUID projectId,
          CmsUUID resourceId,
          byte[] contents,
          int publishTag)
      throws CmsDataAccessException {
  
          PreparedStatement stmt = null;
          PreparedStatement commit = null;
          Connection conn = null;
          ResultSet res = null;
  
          boolean wasInTransaction = false;
          try {
              conn = m_sqlManager.getConnection(dbc);
              if (projectId.equals(CmsProject.ONLINE_PROJECT_ID)) {
                  stmt = m_sqlManager.getPreparedStatement(conn, projectId, "C_ORACLE_ONLINE_CONTENTS_UPDATECONTENT");
              } else {
                  stmt = m_sqlManager.getPreparedStatement(conn, projectId, "C_ORACLE_OFFLINE_CONTENTS_UPDATECONTENT");
              }
  
              wasInTransaction = !conn.getAutoCommit();
              if (!wasInTransaction) {
                  conn.setAutoCommit(false);
              }
  
              // update the file content in the contents table
              stmt.setString(1, resourceId.toString());
              if (projectId.equals(CmsProject.ONLINE_PROJECT_ID)) {
                  stmt.setInt(2, publishTag);
                  stmt.setInt(3, publishTag);
              }
              res = stmt.executeQuery();
              if (!res.next()) {
                  throw new CmsDbEntryNotFoundException(
                      Messages.get().container(Messages.LOG_READING_RESOURCE_1, resourceId));
              }
              // write file content
              OutputStream output = CmsUserDriver.getOutputStreamFromBlob(res, "FILE_CONTENT");
              output.write(contents, 0, contents.length);
              output.close();
  
              if (!wasInTransaction) {
                  commit = m_sqlManager.getPreparedStatement(conn, "C_COMMIT");
                  commit.execute();
                  m_sqlManager.closeAll(dbc, null, commit, null);
              }
  
              m_sqlManager.closeAll(dbc, null, stmt, res);
  
              // this is needed so the finally block works correctly
              commit = null;
              stmt = null;
              res = null;
  
              if (!wasInTransaction) {
                  conn.setAutoCommit(true);
              }
          } catch (IOException e) {
              throw new CmsDbIoException(
                  Messages.get().container(Messages.ERR_WRITING_TO_OUTPUT_STREAM_1, resourceId),
                  e);
          } catch (SQLException e) {
              throw new CmsDbSqlException(
                  org.opencms.db.generic.Messages.get().container(
                      org.opencms.db.generic.Messages.ERR_GENERIC_SQL_1,
                      CmsDbSqlException.getErrorQuery(stmt)),
                  e);
          } finally {
              org.opencms.db.oracle.CmsSqlManager.closeAllInTransaction(
                  m_sqlManager,
                  dbc,
                  conn,
                  stmt,
                  res,
                  commit,
                  wasInTransaction);
          }
      }
  }
  