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.bifromq.mqtt.spi;
  
  import com.google.protobuf.Struct;
  
  /**
   * Factory interface for creating instances of {@link IUserPropsCustomizer}.
   * Implementations should provide a no-argument constructor.
   * <br>
   * The factory can be initialized with a configuration Struct and closed when no longer needed.
   */
  public interface IUserPropsCustomizerFactory {
      /**
       * Creates a new instance of {@link IUserPropsCustomizer}.
       *
       * @return A new instance of {@link IUserPropsCustomizer}.
       */
      IUserPropsCustomizer create();
  
      /**
       * Initializes the factory with the given configuration.
       *
       * @param config The configuration Struct defined in config file.
       */
      default void init(Struct config) {
      }
  
      /**
       * Closes the factory and releases any resources it holds.
       */
      default void close() {
  
      }
  }
  