com.tencent.angel.ml.matrix.psf.update.enhance.MMUpdateParam Maven / Gradle / Ivy

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/*
 * 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.matrix.psf.update.enhance;

import com.tencent.angel.PartitionKey;
import com.tencent.angel.ml.matrix.psf.Utils;
import com.tencent.angel.ml.matrix.psf.update.base.PartitionUpdateParam;
import com.tencent.angel.ml.matrix.psf.update.base.UpdateParam;
import com.tencent.angel.psagent.PSAgentContext;
import io.netty.buffer.ByteBuf;

import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;

/**
 * `MMUpdateParam` is Parameter class for `MMUpdateFunc`
 */
public class MMUpdateParam extends UpdateParam {

  private final int[] rowIds;
  private final double[] scalars;

  public MMUpdateParam(int matrixId, int[] rowIds, double[] scalars) {
    super(matrixId, false);
    this.rowIds = rowIds;
    this.scalars = scalars;
  }

  public MMUpdateParam(int matrixId, int startId, int length, double[] scalars) {
    super(matrixId, false);
    this.rowIds = getRowIds(startId, length);
    this.scalars = scalars;
  }

  private int[] getRowIds(int startId, int length) {
    int[] rowIds = new int[length];
    for (int i = 0; i < length; i++) {
      rowIds[i] = startId + i;
    }
    return rowIds;
  }

  @Override public List split() {
    List parts = PSAgentContext.get().getMatrixMetaManager().getPartitions(matrixId);
    int size = parts.size();
    List partParams = new ArrayList(size);
    for (PartitionKey part : parts) {
      if (Utils.withinPart(part, rowIds)) {
        partParams.add(new MMPartitionUpdateParam(matrixId, part, rowIds, scalars));
      }
    }

    if (partParams.isEmpty()) {
      System.out.println("Rows must in same partition.");
    }

    return partParams;
  }

  public static class MMPartitionUpdateParam extends PartitionUpdateParam {
    private int[] rowIds;
    private double[] scalars;

    public MMPartitionUpdateParam(int matrixId, PartitionKey partKey, int[] rowIds,
      double[] scalars) {
      super(matrixId, partKey, false);
      this.rowIds = rowIds;
      this.scalars = scalars;
    }

    public MMPartitionUpdateParam() {
      super();
    }

    @Override public void serialize(ByteBuf buf) {
      super.serialize(buf);
      buf.writeInt(rowIds.length);
      for (int rowId : rowIds) {
        buf.writeInt(rowId);
      }
      buf.writeInt(scalars.length);
      for (double scalar : scalars) {
        buf.writeDouble(scalar);
      }
    }

    @Override public void deserialize(ByteBuf buf) {
      super.deserialize(buf);
      int rowLength = buf.readInt();
      this.rowIds = new int[rowLength];
      for (int i = 0; i < rowLength; i++) {
        this.rowIds[i] = buf.readInt();
      }

      int scalarLength = buf.readInt();
      this.scalars = new double[scalarLength];
      for (int i = 0; i < scalarLength; i++) {
        this.scalars[i] = buf.readDouble();
      }
    }

    @Override public int bufferLen() {
      return super.bufferLen() + (4 + 4 * rowIds.length) + (4 + 8 * scalars.length);
    }

    public int[] getRowIds() {
      return rowIds;
    }

    public double[] getScalars() {
      return scalars;
    }

    @Override public String toString() {
      return "MMPartitionUpdateParam [rowIds=" + Arrays.toString(rowIds) + ", scalars=" + Arrays
        .toString(rowIds) + ", toString()=" + super.toString() + "]";
    }
  }

}