de.arbeitsagentur.opdt.keycloak.cassandra.transaction.TransactionalRepository Maven / Gradle / Ivy

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/*
 * Copyright 2023 IT-Systemhaus der Bundesagentur fuer Arbeit
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package de.arbeitsagentur.opdt.keycloak.cassandra.transaction;

import com.datastax.oss.driver.api.core.cql.ResultSet;
import de.arbeitsagentur.opdt.keycloak.common.ModelIllegalStateException;

public abstract class TransactionalRepository<
    TEntity extends TransactionalEntity, TDao extends TransactionalDao> {
  protected final TDao dao;

  public TransactionalRepository(TDao dao) {
    this.dao = dao;
  }

  public void insertOrUpdate(TEntity entity) {
    if (entity.getVersion() == null) {
      entity.setVersion(1L);
      dao.insert(entity);
    } else {
      Long currentVersion = entity.getVersion();
      entity.incrementVersion();

      ResultSet result = dao.update(entity, currentVersion);

      if (!result.wasApplied()) {
        throw new ModelIllegalStateException(
            "Entity couldn't be updated because its version "
                + currentVersion
                + " doesn't match the version in the database");
      }
    }
  }
}