com.tencent.angel.sona.psf.hyperanf.GetHyperLogLogParam 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.sona.psf.hyperanf;
import com.tencent.angel.PartitionKey;
import com.tencent.angel.exception.AngelException;
import com.tencent.angel.ml.matrix.psf.get.base.GetParam;
import com.tencent.angel.ml.matrix.psf.get.base.PartitionGetParam;
import com.tencent.angel.psagent.PSAgentContext;
import com.tencent.angel.psagent.matrix.oplog.cache.RowUpdateSplitUtils;

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

public class GetHyperLogLogParam extends GetParam {

  private long[] nodes;
  private long n;

  public GetHyperLogLogParam(int matrixId, long[] nodes, long n) {
    super(matrixId);
    this.nodes = nodes;
    this.n = n;
  }

  @Override
  public List split() {
    Arrays.sort(nodes);

    List params = new ArrayList<>();
    List parts = PSAgentContext.get().getMatrixMetaManager().getPartitions(matrixId);

    if (!RowUpdateSplitUtils.isInRange(nodes, parts)) {
      throw new AngelException(
          "node id is not in range [" + parts.get(0).getStartCol() + ", " + parts
              .get(parts.size() - 1).getEndCol());
    }

    int nodeIndex = 0;
    int partIndex = 0;
    while (nodeIndex < nodes.length || partIndex < parts.size()) {
      int length = 0;
      long endOffset = parts.get(partIndex).getEndCol();
      while (nodeIndex < nodes.length && nodes[nodeIndex] < endOffset) {
        nodeIndex++;
        length++;
      }

      if (length > 0) {
        params.add(new GetHyperLogLogPartParam(matrixId,
            parts.get(partIndex), nodes, n, nodeIndex - length, nodeIndex));
      }
      partIndex++;
    }

    return params;
  }
}