code: /**
   * Copyright 2021 Alibaba, Inc. and its affiliates. All Rights Reserved.
   * 
   * 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.
   
   * <p>
   * \author   Hongqing.hu
   * \date     Mar 2021
   * \brief    Contains the code and reason
   */
  
  package com.alibaba.proxima.be.client;
  
  /**
   * Status for response
   */
  public class Status {
    private final int code;
    private final String reason;
  
    /**
     * Constructor with int code and reason
     * @param code code value from server
     * @param reason error message
     */
    public Status(int code, String reason) {
      this.code = code;
      this.reason = reason;
    }
  
    /**
     * Constructor with ErrorCode and reason
     * @param code error code
     * @param reason error message
     */
    public Status(ErrorCode code, String reason) {
      this.code = code.getCode();
      this.reason = reason;
    }
  
    /**
     * Constructor with error code
     * @param code error code
     */
    public Status(ErrorCode code) {
      this.code = code.getCode();
      if (code == ErrorCode.CLIENT_NOT_CONNECTED) {
        this.reason = "Client not connected to proxima search engine";
      } else if (code == ErrorCode.RPC_TIMEOUT) {
        this.reason = "Rpc request timeout";
      } else if (code == ErrorCode.RPC_ERROR) {
        this.reason = "Rpc error occurred";
      } else if (code == ErrorCode.UNKNOWN_ERROR) {
        this.reason = "Unknown error occurred";
      } else {
        this.reason = "Success";
      }
    }
  
    public int getCode() {
      return code;
    }
  
    public String getReason() {
      return reason;
    }
  
    /**
     * Is status normal
     * @return boolean
     */
    public boolean ok() {
      return this.code == 0;
    }
  
    /**
     * Convert the Status to json string
     * @return String
     */
    public String toString() {
      return "{ \"code\": " + String.valueOf(code) + ", \"reason\": \"" + reason + "\"}";
    }
  
    /**
     * Java client side error
     */
    public enum ErrorCode {
      /**
       * Success status
       */
      SUCCESSS(0),
      /**
       * Rpc timeout
       */
      RPC_TIMEOUT(10000),
      /**
       * Rpc call error
       */
      RPC_ERROR(10001),
      /**
       * Client not connected
       */
      CLIENT_NOT_CONNECTED(10002),
      /**
       * Unknown error
       */
      UNKNOWN_ERROR(10003);
  
      private int code;
  
      ErrorCode(int code) {
        this.code = code;
      }
  
      public int getCode() {
        return this.code;
      }
    }
  }
  