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.celeborn.common.network.server;
  
  import org.apache.celeborn.common.network.client.RpcResponseCallback;
  import org.apache.celeborn.common.network.client.TransportClient;
  import org.apache.celeborn.common.network.protocol.RequestMessage;
  
  /** Handler for sendRPC() messages sent by {@link TransportClient}s. */
  public class BaseMessageHandler {
  
    public void receive(TransportClient client, RequestMessage msg) {
      throw new UnsupportedOperationException();
    }
  
    public void receive(TransportClient client, RequestMessage msg, RpcResponseCallback callback) {
      throw new UnsupportedOperationException();
    }
  
    public boolean checkRegistered() {
      throw new UnsupportedOperationException();
    }
  
    /** Invoked when the channel associated with the given client is active. */
    public void channelActive(TransportClient client) {}
  
    /**
     * Invoked when the channel associated with the given client is inactive. No further requests will
     * come from this client.
     */
    public void channelInactive(TransportClient client) {}
  
    public void exceptionCaught(Throwable cause, TransportClient client) {}
  
    protected void checkAuth(TransportClient client, String appId) {
      if (client.getClientId() != null && !client.getClientId().equals(appId)) {
        throw new IllegalStateException(
            String.format(
                "Client for %s not authorized for application %s.", client.getClientId(), appId));
      }
    }
  }
  