/*
    * This file is part of ***  M y C o R e  ***
    * See http://www.mycore.de/ for details.
    *
    * MyCoRe is free software: you can redistribute it and/or modify
    * it under the terms of the GNU General Public License as published by
    * the Free Software Foundation, either version 3 of the License, or
    * (at your option) any later version.
    *
   * MyCoRe 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 for more details.
   *
   * You should have received a copy of the GNU General Public License
   * along with MyCoRe.  If not, see <http://www.gnu.org/licenses/>.
   */
  
  package org.mycore.restapi;
  
  import java.io.IOException;
  
  import org.apache.logging.log4j.LogManager;
  import org.apache.logging.log4j.Logger;
  import org.mycore.common.MCRSession;
  import org.mycore.common.MCRSessionMgr;
  import org.mycore.common.MCRTransactionHelper;
  
  import jakarta.annotation.Priority;
  import jakarta.ws.rs.InternalServerErrorException;
  import jakarta.ws.rs.Priorities;
  import jakarta.ws.rs.container.ContainerRequestContext;
  import jakarta.ws.rs.container.ContainerRequestFilter;
  
  @Priority(Priorities.USER)
  public class MCRTransactionFilter implements ContainerRequestFilter {
  
      public static final String PROP_REQUIRE_TRANSACTION = "mcr:jpaTrans";
  
      public static final Logger LOGGER = LogManager.getLogger();
  
      @Override
      public void filter(ContainerRequestContext requestContext) throws IOException {
          if (MCRSessionMgr.isLocked()) {
              return;
          }
          MCRSession mcrSession = MCRSessionMgr.getCurrentSession();
          if (MCRTransactionHelper.isTransactionActive()) {
              LOGGER.debug("Filter scoped JPA transaction is active.");
              if (MCRTransactionHelper.transactionRequiresRollback()) {
                  try {
                      MCRTransactionHelper.rollbackTransaction();
                  } finally {
                      throw new InternalServerErrorException("Transaction rollback was required.");
                  }
              }
              MCRTransactionHelper.commitTransaction();
          }
          if (Boolean.TRUE.equals(requestContext.getProperty(PROP_REQUIRE_TRANSACTION))) {
              LOGGER.debug("Starting user JPA transaction.");
              MCRTransactionHelper.beginTransaction();
          }
      }
  }