content: /*
   * Licensed to the Apache Software Foundation (ASF) under one
   * or more contributor license agreements.  See the NOTICE file
   * distributed with this work for additional information
   * regarding copyright ownership.  The ASF licenses this file
   * to you 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 org.apache.cassandra.utils;
  
  import java.lang.reflect.Method;
  import javax.security.auth.Subject;
  
  /**
   * Listener for operations executed over JMX.
   */
  public interface JmxInvocationListener
  {
      /**
       * Listener called when an attempted invocation is successful.
       *
       * @param subject The subject attempting invocation, depends on how JMX authentication is configured
       * @param method Invoked method
       * @param args Invoked method arguments
       */
      default void onInvocation(Subject subject, Method method, Object[] args)
      {}
  
      /**
       * Listener called when an attempted invocation throws an exception. This could happen before or after the
       * underlying method is invoked, due to invocation wrappers such as {@link org.apache.cassandra.auth.jmx.AuthorizationProxy#invoke(Object, Method, Object[])}.
       *
       * @param subject The subject attempting invocation, depends on how JMX authentication is configured
       * @param method Invoked method
       * @param args Invoked method arguments
       * @param cause Exception thrown by the attempted invocation
       */
      default void onFailure(Subject subject, Method method, Object[] args, Exception cause)
      {}
  }
  