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.slots.block.flow.param;
  
  import com.alibaba.csp.sentinel.slots.block.BlockException;
  
  /**
   * Block exception for frequent ("hot-spot") parameter flow control.
   *
   * @author jialiang.linjl
   * @since 0.2.0
   */
  public class ParamFlowException extends BlockException {
  
      private final String resourceName;
  
      public ParamFlowException(String resourceName, String message, Throwable cause) {
          super(message, cause);
          this.resourceName = resourceName;
      }
  
      public ParamFlowException(String resourceName, String param) {
          super(param, param);
          this.resourceName = resourceName;
      }
  
      public ParamFlowException(String resourceName, String param, ParamFlowRule rule) {
          super(param, param);
          this.resourceName = resourceName;
          this.rule = rule;
      }
  
      public String getResourceName() {
          return resourceName;
      }
  
      @Override
      public Throwable fillInStackTrace() {
          return this;
      }
  
      /**
       * Get the parameter value that triggered the parameter flow control.
       *
       * @return the parameter value
       * @since 1.4.2
       */
      public String getLimitParam() {
          return getMessage();
      }
  
      /**
       * Get triggered rule.
       * Note: the rule result is a reference to rule map and SHOULD NOT be modified.
       *
       * @return triggered rule
       * @since 1.4.2
       */
      @Override
      public ParamFlowRule getRule() {
          return rule.as(ParamFlowRule.class);
      }
  }
  