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.ml.lda.psf;
  
  import com.tencent.angel.PartitionKey;
  import com.tencent.angel.ml.matrix.psf.update.base.PartitionUpdateParam;
  import com.tencent.angel.ml.matrix.psf.update.base.UpdateFunc;
  import com.tencent.angel.ml.matrix.psf.update.base.UpdateParam;
  import com.tencent.angel.ps.storage.vector.ServerIntIntRow;
  import com.tencent.angel.ps.storage.vector.ServerRow;
  import com.tencent.angel.ps.storage.vector.ServerRowUtils;
  import io.netty.buffer.ByteBuf;
  import org.apache.commons.logging.Log;
  import org.apache.commons.logging.LogFactory;
  
  public class UpdatePartFunc extends UpdateFunc {
    private final static Log LOG = LogFactory.getLog(UpdatePartFunc.class);
  
    public UpdatePartFunc(UpdateParam param) {
      super(param);
    }
  
    public UpdatePartFunc() {
      super(null);
    }
  
    @Override public void partitionUpdate(PartitionUpdateParam partParam) {
      CSRPartUpdateParam param = (CSRPartUpdateParam) partParam;
  
      PartitionKey pkey = partParam.getPartKey();
  
      pkey = psContext.getMatrixMetaManager().getMatrixMeta(pkey.getMatrixId())
        .getPartitionMeta(pkey.getPartitionId()).getPartitionKey();
  
      try {
        while (param.buf.isReadable()) {
          int row = param.buf.readInt();
          int len = param.buf.readInt();
  
          ServerRow serverRow = psContext.getMatrixStorageManager().getRow(pkey, row);
          try {
            serverRow.startWrite();
            if (serverRow.isDense())
              updateDenseIntRow((ServerIntIntRow) serverRow, param.buf, len);
            if (serverRow.isSparse())
              updateSparseIntRow((ServerIntIntRow) serverRow, param.buf, len);
          } finally {
            serverRow.endWrite();
          }
        }
      } finally {
        param.buf.release();
      }
    }
  
    public void updateDenseIntRow(ServerIntIntRow row, ByteBuf buf, int len) {
      int[] values = ServerRowUtils.getVector(row).getStorage().getValues();
      for (int i = 0; i < len; i++) {
        int key = buf.readInt();
        int val = buf.readInt();
        values[key] += val;
      }
  
    }
  
    public void updateSparseIntRow(ServerIntIntRow row, ByteBuf buf, int len) {
      for (int i = 0; i < len; i++) {
        int key = buf.readInt();
        int val = buf.readInt();
        row.set(key, row.get(key) + val);
      }
    }
  }
  