content: /*
   * Licensed to the Apache Software Foundation (ASF) under one
   * or more contributor license agreements.  See the NOTICE file
   * distributed with this work for additional information
   * regarding copyright ownership.  The ASF licenses this file
   * to you 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 org.apache.cassandra.sidecar.db;
  
  import java.util.Map;
  import java.util.Optional;
  
  /**
   * CDC configs are stored inside "configs" table of sidecar keyspace. This is an interface for
   * database accessor of "configs" table
   */
  public interface ConfigAccessor
  {
      /**
       * Gets the configs of a service
       * @return returns configs for the current service
       */
      ServiceConfig getConfig();
  
      /**
       * Persists configs into the "configs" table for the current service
       *
       * @param config configs to be persisted
       * @return returns updated configs
       */
      ServiceConfig storeConfig(Map<String, String> config);
  
      /**
       * Stores configs of the current service if they are not already present
       *
       * @param config new configs
       * @return updated configs
       */
      Optional<ServiceConfig> storeConfigIfNotExists(Map<String, String> config);
  
      /**
       * Deletes all configurations for the given service
       */
      void deleteConfig();
  }
  