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.streaming;
  
  import org.apache.cassandra.schema.TableId;
  import org.apache.cassandra.streaming.messages.OutgoingStreamMessage;
  import org.apache.cassandra.utils.FBUtilities;
  
  import static org.apache.cassandra.config.CassandraRelevantProperties.STREAM_HOOK;
  
  public interface StreamHook
  {
      public static final StreamHook instance = createHook();
  
      public OutgoingStreamMessage reportOutgoingStream(StreamSession session, OutgoingStream stream, OutgoingStreamMessage message);
      public void reportStreamFuture(StreamSession session, StreamResultFuture future);
      public void reportIncomingStream(TableId tableId, IncomingStream stream, StreamSession session, int sequenceNumber);
  
      static StreamHook createHook()
      {
          String className = STREAM_HOOK.getString();
          if (className != null)
          {
              return FBUtilities.construct(className, StreamHook.class.getSimpleName());
          }
          else
          {
              return new StreamHook()
              {
                  public OutgoingStreamMessage reportOutgoingStream(StreamSession session, OutgoingStream stream, OutgoingStreamMessage message)
                  {
                      return message;
                  }
  
                  public void reportStreamFuture(StreamSession session, StreamResultFuture future) {}
  
                  public void reportIncomingStream(TableId tableId, IncomingStream stream, StreamSession session, int sequenceNumber) {}
              };
          }
      }
  }
  