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.psf.clusterrank;
  
  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.RowBasedPartition;
  import com.tencent.angel.ps.storage.vector.ServerLongIntRow;
  import it.unimi.dsi.fastutil.longs.Long2IntMap;
  import it.unimi.dsi.fastutil.objects.ObjectIterator;
  
  public class InitOutDegreeFunc extends UpdateFunc {
  
      public InitOutDegreeFunc() {
          this(null);
      }
  
      public InitOutDegreeFunc(InitOutDegreeParam param) {
          super(param);
      }
  
      @Override
      public void partitionUpdate(PartitionUpdateParam partParam) {
          PartInitOutDegreeParam param = (PartInitOutDegreeParam) partParam;
          ServerMatrix matrix = psContext.getMatrixStorageManager().getMatrix(partParam.getMatrixId());
          RowBasedPartition part = (RowBasedPartition) matrix
                  .getPartition(partParam.getPartKey().getPartitionId());
          ServerLongIntRow row = (ServerLongIntRow) part.getRow(0);
  
          ObjectIterator<Long2IntMap.Entry> iter = param.getNodeIdToOutDegree().long2IntEntrySet().iterator();
          row.startWrite();
          try {
              while (iter.hasNext()) {
                  Long2IntMap.Entry entry = iter.next();
                  row.set(entry.getLongKey(), entry.getIntValue());
              }
          } finally {
              row.endWrite();
          }
  
      }
  }
  