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
   *
   *     https://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.avro.ipc;
  
  /**
   * An instrumentation API for RPC metadata. Each of these methods is invoked at
   * key points during the RPC exchange. Additionally, path-based
   * <em>metadata</em> that is passed along with the RPC call and can be set or
   * queried by subsequent instrumentation points.
   */
  public class RPCPlugin {
  
    /**
     * Called on the client before the initial RPC handshake to setup any handshake
     * metadata for this plugin
     * 
     * @param context the handshake rpc context
     */
    public void clientStartConnect(RPCContext context) {
    }
  
    /**
     * Called on the server during the RPC handshake
     * 
     * @param context the handshake rpc context
     */
    public void serverConnecting(RPCContext context) {
    }
  
    /**
     * Called on the client after the initial RPC handshake
     * 
     * @param context the handshake rpc context
     */
    public void clientFinishConnect(RPCContext context) {
    }
  
    /**
     * This method is invoked at the client before it issues the RPC call.
     * 
     * @param context the per-call rpc context (in/out parameter)
     */
    public void clientSendRequest(RPCContext context) {
    }
  
    /**
     * This method is invoked at the RPC server when the request is received, but
     * before the call itself is executed
     * 
     * @param context the per-call rpc context (in/out parameter)
     */
    public void serverReceiveRequest(RPCContext context) {
    }
  
    /**
     * This method is invoked at the server before the response is executed, but
     * before the response has been formulated
     * 
     * @param context the per-call rpc context (in/out parameter)
     */
    public void serverSendResponse(RPCContext context) {
    }
  
    /**
     * This method is invoked at the client after the call is executed, and after
     * the client receives the response
     * 
     * @param context the per-call rpc context
     */
    public void clientReceiveResponse(RPCContext context) {
    }
  
  }
  