/***************************************************************************
* Copyright (C) 2012 by H-Store Project *
* Brown University *
* Massachusetts Institute of Technology *
* Yale University *
* *
* Original By: VoltDB Inc. *
* Ported By: Justin A. DeBrabant (http://www.cs.brown.edu/~debrabant/) *
* *
* *
* Permission is hereby granted, free of charge, to any person obtaining *
* a copy of this software and associated documentation files (the *
* "Software"), to deal in the Software without restriction, including *
* without limitation the rights to use, copy, modify, merge, publish, *
* distribute, sublicense, and/or sell copies of the Software, and to *
* permit persons to whom the Software is furnished to do so, subject to *
* the following conditions: *
* *
* The above copyright notice and this permission notice shall be *
* included in all copies or substantial portions of the Software. *
* *
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, *
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF *
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. *
* IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR *
* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, *
* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR *
* OTHER DEALINGS IN THE SOFTWARE. *
***************************************************************************/
package edu.brown.benchmark.voter;
import java.util.Random;
public class PhoneCallGenerator {
private long nextVoteId;
private final int contestantCount;
private final Random rand = new Random();
private final int[] votingMap = new int[AREA_CODES.length];
// Initialize some common constants and variables
private static final String[] AREA_CODE_STRS = ("907,205,256,334,251,870,501,479" +
",480,602,623,928,520,341,764,628,831,925,909,562,661,510,650,949,760" +
",415,951,209,669,408,559,626,442,530,916,627,714,707,310,323,213,424" +
",747,818,858,935,619,805,369,720,303,970,719,860,203,959,475,202,302" +
",689,407,239,850,727,321,754,954,927,352,863,386,904,561,772,786,305" +
",941,813,478,770,470,404,762,706,678,912,229,808,515,319,563,641,712" +
",208,217,872,312,773,464,708,224,847,779,815,618,309,331,630,317,765" +
",574,260,219,812,913,785,316,620,606,859,502,270,504,985,225,318,337" +
",774,508,339,781,857,617,978,351,413,443,410,301,240,207,517,810,278" +
",679,313,586,947,248,734,269,989,906,616,231,612,320,651,763,952,218" +
",507,636,660,975,816,573,314,557,417,769,601,662,228,406,336,252,984" +
",919,980,910,828,704,701,402,308,603,908,848,732,551,201,862,973,609" +
",856,575,957,505,775,702,315,518,646,347,212,718,516,917,845,631,716" +
",585,607,914,216,330,234,567,419,440,380,740,614,283,513,937,918,580" +
",405,503,541,971,814,717,570,878,835,484,610,267,215,724,412,401,843" +
",864,803,605,423,865,931,615,901,731,254,325,713,940,817,430,903,806" +
",737,512,361,210,979,936,409,972,469,214,682,832,281,830,956,432,915" +
",435,801,385,434,804,757,703,571,276,236,540,802,509,360,564,206,425" +
",253,715,920,262,414,608,304,307").split(",");
// convert the area code array to a list of digits
private static final long[] AREA_CODES = new long[AREA_CODE_STRS.length];
static {
for (int i = 0; i < AREA_CODES.length; i++)
AREA_CODES[i] = Long.parseLong(AREA_CODE_STRS[i]);
}
public static class PhoneCall {
public final long voteId;
public final int contestantNumber;
public final long phoneNumber;
protected PhoneCall(long voteId, int contestantNumber, long phoneNumber) {
this.voteId = voteId;
this.contestantNumber = contestantNumber;
this.phoneNumber = phoneNumber;
}
}
public PhoneCallGenerator(int clientId, int contestantCount) {
this.nextVoteId = clientId * 100000000l;
this.contestantCount = contestantCount;
// This is a just a small fudge to make the geographical voting map more interesting for the benchmark!
for(int i = 0; i < votingMap.length; i++) {
votingMap[i] = 1;
if (rand.nextInt(100) >= 30) {
votingMap[i] = (int) (Math.abs(Math.sin(i)* contestantCount) % contestantCount) + 1;
}
}
}
/**
* Receives/generates a simulated voting call
* @return Call details (calling number and contestant to whom the vote is given)
*/
public PhoneCall receive()
{
// For the purpose of a benchmark, issue random voting activity
// (including invalid votes to demonstrate transaction validationg in the database)
// Pick a random area code for the originating phone call
int areaCodeIndex = rand.nextInt(AREA_CODES.length);
// Pick a contestant number
int contestantNumber = votingMap[areaCodeIndex];
if (rand.nextBoolean()) {
contestantNumber = rand.nextInt(contestantCount) + 1;
}
// introduce an invalid contestant every 100 call or so to simulate fraud
// and invalid entries (something the transaction validates against)
if (rand.nextInt(100) == 0) {
contestantNumber = 999;
}
// Build the phone number
long phoneNumber = AREA_CODES[areaCodeIndex] * 100000000L + rand.nextInt(100000000);
// This needs to be globally unique
// Return the generated phone number
return new PhoneCall(this.nextVoteId++, contestantNumber, phoneNumber);
}
}