content: /*
   * Copyright 1999-2018 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
   *
   *      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 com.alibaba.csp.sentinel.transport.client;
  
  import com.alibaba.csp.sentinel.command.CommandRequest;
  import com.alibaba.csp.sentinel.command.CommandResponse;
  
  /**
   * Basic interface for clients that sending commands.
   *
   * @author Eric Zhao
   */
  public interface CommandClient {
  
      /**
       * Send a command to target destination.
       *
       * @param host    target host
       * @param port    target port
       * @param request command request
       * @return the response from target command server
       * @throws Exception when unexpected error occurs
       */
      CommandResponse sendCommand(String host, int port, CommandRequest request) throws Exception;
  }
  