| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you 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 |
| * |
| * http://www.apache.org/licenses/LICENSE-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 org.apache.pirk.responder.wideskies.spark; |
| |
| import java.io.IOException; |
| import java.math.BigInteger; |
| import java.util.ArrayList; |
| import java.util.List; |
| |
| import org.apache.hadoop.conf.Configuration; |
| import org.apache.hadoop.fs.FileSystem; |
| import org.apache.pirk.query.wideskies.Query; |
| import org.apache.pirk.query.wideskies.QueryInfo; |
| import org.apache.pirk.responder.wideskies.common.ComputeEncryptedRow; |
| import org.apache.spark.api.java.function.PairFlatMapFunction; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| import scala.Tuple2; |
| |
| /** |
| * Function to calculate the encrypted rows of the encrypted query |
| * <p> |
| * For each row (as indicated by key = hash(selector)), iterates over each dataElement and calculates the column values. |
| * <p> |
| * Emits {@code <colNum, colVal>} |
| * |
| */ |
| public class EncRowCalc implements PairFlatMapFunction<Tuple2<Integer,Iterable<List<BigInteger>>>,Long,BigInteger> |
| { |
| private static final long serialVersionUID = 1L; |
| |
| private static final Logger logger = LoggerFactory.getLogger(EncRowCalc.class); |
| |
| private Accumulators accum = null; |
| |
| private Query query = null; |
| private QueryInfo queryInfo = null; |
| |
| private boolean useLocalCache = false; |
| private boolean limitHitsPerSelector = false; |
| private int maxHitsPerSelector = 0; |
| |
| public EncRowCalc(Accumulators accumIn, BroadcastVars bvIn) |
| { |
| accum = accumIn; |
| |
| query = bvIn.getQuery(); |
| queryInfo = bvIn.getQueryInfo(); |
| useLocalCache = bvIn.getUseLocalCache(); |
| limitHitsPerSelector = bvIn.getLimitHitsPerSelector(); |
| maxHitsPerSelector = bvIn.getMaxHitsPerSelector(); |
| |
| logger.info("Initialized EncRowCalc - limitHitsPerSelector = " + limitHitsPerSelector + " maxHitsPerSelector = " + maxHitsPerSelector); |
| } |
| |
| @Override |
| public Iterable<Tuple2<Long,BigInteger>> call(Tuple2<Integer,Iterable<List<BigInteger>>> hashDocTuple) throws Exception |
| { |
| List<Tuple2<Long,BigInteger>> returnPairs = new ArrayList<>(); |
| |
| int rowIndex = hashDocTuple._1; |
| accum.incNumHashes(1); |
| |
| if (queryInfo.useHDFSExpLookupTable()) |
| { |
| FileSystem fs; |
| try |
| { |
| fs = FileSystem.get(new Configuration()); |
| } catch (IOException e) |
| { |
| e.printStackTrace(); |
| throw e; |
| } |
| ComputeEncryptedRow.loadCacheFromHDFS(fs, query.getExpFile(rowIndex), query); |
| } |
| |
| // Compute the encrypted row elements for a query from extracted data partitions |
| List<Tuple2<Long,BigInteger>> encRowValues = ComputeEncryptedRow.computeEncRowBI(hashDocTuple._2, query, rowIndex, limitHitsPerSelector, maxHitsPerSelector, |
| useLocalCache); |
| |
| returnPairs.addAll(encRowValues); |
| |
| return returnPairs; |
| } |
| } |