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.nacos.config.server.exception;
  
  import com.alibaba.nacos.api.exception.NacosException;
  import com.alibaba.nacos.api.exception.runtime.NacosRuntimeException;
  import com.alibaba.nacos.common.utils.ExceptionUtil;
  import com.alibaba.nacos.config.server.monitor.MetricsMonitor;
  import com.alibaba.nacos.persistence.monitor.DatasourceMetrics;
  import org.springframework.core.Ordered;
  import org.springframework.core.annotation.Order;
  import org.springframework.dao.DataAccessException;
  import org.springframework.http.ResponseEntity;
  import org.springframework.web.bind.annotation.ControllerAdvice;
  import org.springframework.web.bind.annotation.ExceptionHandler;
  
  import java.io.IOException;
  
  /**
   * Global exception handler.
   *
   * @author Nacos
   */
  @ControllerAdvice(basePackages = "com.alibaba.nacos.config.server")
  @Order(Ordered.LOWEST_PRECEDENCE - 1)
  public class GlobalExceptionHandler {
      
      /**
       * For IllegalArgumentException, we are returning void with status code as 400, so our error-page will be used in
       * this case.
       *
       * @throws IllegalArgumentException IllegalArgumentException.
       */
      @ExceptionHandler(IllegalArgumentException.class)
      public ResponseEntity<String> handleIllegalArgumentException(Exception ex) throws IOException {
          MetricsMonitor.getIllegalArgumentException().increment();
          return ResponseEntity.status(400).body(ExceptionUtil.getAllExceptionMsg(ex));
      }
      
      /**
       * For NacosRuntimeException.
       *
       * @throws com.alibaba.nacos.api.exception.runtime.NacosRuntimeException NacosRuntimeException.
       */
      @ExceptionHandler(NacosRuntimeException.class)
      public ResponseEntity<String> handleNacosRunTimeException(NacosRuntimeException ex) throws IOException {
          MetricsMonitor.getNacosException().increment();
          return ResponseEntity.status(ex.getErrCode()).body(ExceptionUtil.getAllExceptionMsg(ex));
      }
  
      /**
       * For NacosException.
       *
       * @throws NacosException NacosException.
       */
      @ExceptionHandler(NacosException.class)
      public ResponseEntity<String> handleNacosException(NacosException ex) throws IOException {
          MetricsMonitor.getNacosException().increment();
          return ResponseEntity.status(ex.getErrCode()).body(ExceptionUtil.getAllExceptionMsg(ex));
      }
  
      /**
       * For DataAccessException.
       *
       * @throws DataAccessException DataAccessException.
       */
      @ExceptionHandler(DataAccessException.class)
      public ResponseEntity<String> handleDataAccessException(DataAccessException ex) throws DataAccessException {
          DatasourceMetrics.getDbException().increment();
          return ResponseEntity.status(500).body(ExceptionUtil.getAllExceptionMsg(ex));
      }
  }
  