com.tencent.angel.sona.psf.hyperanf.GetHyperLogLog 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.clearspring.analytics.stream.cardinality.HyperLogLogPlus;
import com.tencent.angel.ml.matrix.psf.get.base.GetFunc;
import com.tencent.angel.ml.matrix.psf.get.base.GetResult;
import com.tencent.angel.ml.matrix.psf.get.base.PartitionGetParam;
import com.tencent.angel.ml.matrix.psf.get.base.PartitionGetResult;
import com.tencent.angel.ps.storage.vector.ServerLongAnyRow;
import it.unimi.dsi.fastutil.longs.Long2ObjectOpenHashMap;

import java.util.List;

public class GetHyperLogLog extends GetFunc {

  public GetHyperLogLog(GetHyperLogLogParam param) {
    super(param);
  }

  public GetHyperLogLog(int matrixId, long[] nodes) {
    super(new GetHyperLogLogParam(matrixId, nodes, 0L));
  }

  public GetHyperLogLog() {
    super(null);
  }

  @Override
  public PartitionGetResult partitionGet(PartitionGetParam partParam) {
    GetHyperLogLogPartParam param = (GetHyperLogLogPartParam) partParam;
    ServerLongAnyRow row = (ServerLongAnyRow) psContext.getMatrixStorageManager().getRow(param.getPartKey(), 0);

    long[] nodes = param.getNodes();
    Long2ObjectOpenHashMap logs = new Long2ObjectOpenHashMap<>();
    row.startRead(20000);
    try {
      for (int i = 0; i < nodes.length; i++) {
        HyperLogLogPlusElement hllElem = (HyperLogLogPlusElement) row.get(nodes[i]);
        if (hllElem.isActive()) {
          logs.put(nodes[i], hllElem.getHyperLogLogPlus());
        }
      }
    } finally {
      row.endRead();
    }
    return new GetHyperLogLogPartResult(logs);
  }

  @Override
  public GetResult merge(List partResults) {
    Long2ObjectOpenHashMap logs = new Long2ObjectOpenHashMap<>();
    for (PartitionGetResult r: partResults) {
      GetHyperLogLogPartResult rr = (GetHyperLogLogPartResult) r;
      logs.putAll(rr.getLogs());
    }

    return new GetHyperLogLogResult(logs);
  }
}