content: /*
   * Tencent is pleased to support the open source community by making Angel available.
   *
   * Copyright (C) 2017-2018 THL A29 Limited, a Tencent company. All rights reserved.
   *
   * 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
   *
   * https://opensource.org/licenses/Apache-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.tencent.angel.graph.client.initneighbor;
  
  import com.tencent.angel.ml.matrix.psf.update.base.PartitionUpdateParam;
  import com.tencent.angel.ml.matrix.psf.update.base.UpdateFunc;
  import com.tencent.angel.ps.storage.matrix.ServerMatrix;
  import com.tencent.angel.ps.storage.partition.CSRPartition;
  import com.tencent.angel.ps.storage.partition.storage.IntCSRStorage;
  import java.util.ArrayList;
  import java.util.List;
  
  /**
   * Init node neighbors
   */
  public class InitNeighbor extends UpdateFunc {
  
    public InitNeighbor(InitNeighborParam param) {
      super(param);
    }
  
    public InitNeighbor() {
      this(null);
    }
  
    @Override
    public void partitionUpdate(PartitionUpdateParam partParam) {
      PartInitNeighborParam param = (PartInitNeighborParam) partParam;
      int[] nodeIds = param.getNodeIds();
      int[] neighborNums = param.getNeighborNums();
      int[] neighbors = param.getNeighbors();
  
      ServerMatrix matrix = psContext.getMatrixStorageManager().getMatrix(param.getMatrixId());
      CSRPartition part = (CSRPartition) matrix.getPartition(param.getPartKey().getPartitionId());
      IntCSRStorage storage = (IntCSRStorage) part.getStorage();
  
      synchronized (storage) {
        int startOffset = (int) param.getPartKey().getStartCol();
  
        // Store the total neighbor number of all nodes in rowOffsets
        int[] rowOffsets = storage.getRowOffsets();
        for (int i = 0; i < nodeIds.length; i++) {
          rowOffsets[nodeIds[i] - startOffset] += neighborNums[i];
        }
  
        // Put the node ids, node neighbor number, node neighbors to the cache
        List<int[]> tempRowIds = storage.getTempRowIds();
        List<int[]> tempRowLens = storage.getTempRowLens();
        List<int[]> tempColumnOffsets = storage.getTempColumnIndices();
        if (tempRowIds == null) {
          tempRowIds = new ArrayList<>();
          tempRowLens = new ArrayList<>();
          tempColumnOffsets = new ArrayList<>();
          storage.setTempRowIds(tempRowIds);
          storage.setTempRowLens(tempRowLens);
          storage.setTempColumnIndices(tempColumnOffsets);
        }
  
        tempRowIds.add(param.getNodeIds());
        tempRowLens.add(neighborNums);
        tempColumnOffsets.add(neighbors);
      }
    }
  }
  