content: /*
   * Copyright 2021 Alibaba Group Holding Limited.
   *
   * 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.graphscope.loader;
  
  import org.apache.giraph.edge.Edge;
  import org.apache.hadoop.io.Writable;
  import org.apache.hadoop.io.WritableComparable;
  
  import java.io.IOException;
  
  public interface GraphDataBufferManager {
  
      void addVertex(int threadId, Writable id, Writable value) throws IOException;
  
      void addEdges(int threadId, Writable id, Iterable<Edge> edges) throws IOException;
  
      void addEdge(int threadId, WritableComparable srcId, WritableComparable dstId, Writable value)
              throws IOException;
  
      void reserveNumVertices(int length);
  
      void reserveNumEdges(int length);
  
      void finishAdding();
  }
  