content: /*
   * Copyright 1999-2022 Alibaba Group Holding Ltd.
   *
   * 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
   *
   *      https://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 com.alibaba.csp.sentinel.command;
  
  /**
   * Intercepts specified command, and can be extended using SPI.
   *
   * @author icodening
   * @since 1.8.4
   * @see com.alibaba.csp.sentinel.spi.SpiLoader
   * @see com.alibaba.csp.sentinel.spi.Spi
   */
  public interface CommandHandlerInterceptor<R> {
  
      /**
       * whether to intercept the specified command
       *
       * @param commandName command name, eg. getRules
       * @return "true" means intercept, "false" means skip
       */
      boolean shouldIntercept(String commandName);
  
      /**
       * intercept the given command request, and return a command response
       *
       * @param request   commandRequest
       * @param execution interceptor chain execution
       * @return command response
       */
      CommandResponse<R> intercept(CommandRequest request, CommandRequestExecution<R> execution);
  
  }
  