// Command line argument: C:\Users\dilet\Desktop\TwitterDB 0 10 15 0.1 1 1
public static void Main(string[] args)
{
Console.WriteLine("RWR-based Recommendation (" + DateTime.Now.ToString() + ")\n");
Stopwatch programStopwatch = Stopwatch.StartNew();
// Program arguments
string dirPath = args[0] + Path.DirectorySeparatorChar; // Path of directory that containes SQLite DB files
string[] methodologyList = args[1].Split(','); // The list of experimental codes (csv format; for example: 0,1,8,9,10,11,12 )
int kFolds = int.Parse(args[2]); // Number of folds
int nIterations = int.Parse(args[3]); // Number of iterations for RWR
egoLikeThresholdRatioInTestSet = double.Parse(args[4]);
isOnlyFriendInEgoNetwork = (int.Parse(args[5]) == 1) ? true : false;
isGenericFriendship = (int.Parse(args[6]) == 1) ? true : false;
// <Ego, dbPath(.sqlite)> Sorted by Ego ID(Ascending Order)
string[] dbCollection = Directory.GetFiles(dirPath, "*.sqlite");
SortedDictionary<long, string> egoList = new SortedDictionary<long, string>();
foreach (string dbPath in dbCollection)
{
long egoID = long.Parse(Path.GetFileNameWithoutExtension(dbPath));
egoList.Add(egoID, dbPath);
}
// Methodology list(Experiment Codes)
List<Methodology> methodologies = new List<Methodology>();
foreach (string methodology in methodologyList)
methodologies.Add((Methodology) int.Parse(methodology));
// #Core Part: One .sqlite to One thread
int cntSemaphore = 1;
Program.dbSemaphore = new Semaphore(cntSemaphore, cntSemaphore);
foreach (Methodology methodology in methodologies)
{
// Outfile Setting
string outFilePath = args[0] + Path.DirectorySeparatorChar + "RWR_MAP_10Split_Friend_Domain1_" + (int)methodology + "_Friendship0.txt";
// Load existing experimental results: SKIP already performed experiments
HashSet<long> alreadyPerformedEgoList = new HashSet<long>(); // (<ego ID>, <{Experiments Codes}>)
if (File.Exists(outFilePath))
{
using (StreamReader reader = new StreamReader(outFilePath))
{
string line;
while ((line = reader.ReadLine()) != null)
{
string[] tokens = line.Split('\t');
long egoUser = long.Parse(tokens[0]);
alreadyPerformedEgoList.Add(egoUser);
}
}
}
Program.logger = new StreamWriter(outFilePath, true);
// Personalized PageRank: Multi-threading
Experiment experiment;
personalizedPageRankThreadParamters pagaRankParameters;
List<Thread> threadList = new List<Thread>();
foreach (KeyValuePair<long, string> egoDBpair in egoList)
{
long egoID = egoDBpair.Key;
string dbPath = egoDBpair.Value;
if (alreadyPerformedEgoList.Contains(egoID) == true)
{
Console.WriteLine("Ego {0} Already Performend", egoID);
continue;
}
try
{
// one Thread to one DB
Program.dbSemaphore.WaitOne();
Console.WriteLine("Ego {0} Start", egoID);
experiment = new Experiment(dbPath);
Thread thread = new Thread(experiment.startPersonalizedPageRank);
pagaRankParameters = new personalizedPageRankThreadParamters(kFolds, nIterations, methodology);
thread.Start(pagaRankParameters);
threadList.Add(thread);
}
catch (Exception e)
{
Console.WriteLine(e.Message);
}
}
foreach (Thread thread in threadList)
thread.Join();
// Close Output file
Program.logger.Close();
}
// Execution Time
programStopwatch.Stop();
Console.WriteLine("Execution Time: " + Tools.getExecutionTime(programStopwatch));
Console.WriteLine("Finished!");
}
// Command line argument: C:\Users\dilet\Desktop\TwitterDB 0 10 15 0.1 1 1
public static void Main(string[] args)
{
Console.WriteLine("RWR-based Recommendation (" + DateTime.Now.ToString() + ")\n");
Stopwatch programStopwatch = Stopwatch.StartNew();
// Program arguments
string dirPath = args[0] + Path.DirectorySeparatorChar; // Path of directory that containes SQLite DB files
string[] methodologyList = args[1].Split(','); // The list of experimental codes (csv format; for example: 0,1,8,9,10,11,12 )
int kFolds = int.Parse(args[2]); // Number of folds
int nIterations = int.Parse(args[3]); // Number of iterations for RWR
egoLikeThresholdRatioInTestSet = double.Parse(args[4]);
isOnlyFriendInEgoNetwork = (int.Parse(args[5]) == 1) ? true : false;
isGenericFriendship = (int.Parse(args[6]) == 1) ? true : false;
// <Ego, dbPath(.sqlite)> Sorted by Ego ID(Ascending Order)
string[] dbCollection = Directory.GetFiles(dirPath, "*.sqlite");
SortedDictionary <long, string> egoList = new SortedDictionary <long, string>();
foreach (string dbPath in dbCollection)
{
long egoID = long.Parse(Path.GetFileNameWithoutExtension(dbPath));
egoList.Add(egoID, dbPath);
}
// Methodology list(Experiment Codes)
List <Methodology> methodologies = new List <Methodology>();
foreach (string methodology in methodologyList)
{
methodologies.Add((Methodology)int.Parse(methodology));
}
// #Core Part: One .sqlite to One thread
int cntSemaphore = 1;
Program.dbSemaphore = new Semaphore(cntSemaphore, cntSemaphore);
foreach (Methodology methodology in methodologies)
{
// Outfile Setting
string outFilePath = args[0] + Path.DirectorySeparatorChar + "RWR_MAP_10Split_Friend_Domain1_" + (int)methodology + "_Friendship0.txt";
// Load existing experimental results: SKIP already performed experiments
HashSet <long> alreadyPerformedEgoList = new HashSet <long>(); // (<ego ID>, <{Experiments Codes}>)
if (File.Exists(outFilePath))
{
using (StreamReader reader = new StreamReader(outFilePath))
{
string line;
while ((line = reader.ReadLine()) != null)
{
string[] tokens = line.Split('\t');
long egoUser = long.Parse(tokens[0]);
alreadyPerformedEgoList.Add(egoUser);
}
}
}
Program.logger = new StreamWriter(outFilePath, true);
// Personalized PageRank: Multi-threading
Experiment experiment;
personalizedPageRankThreadParamters pagaRankParameters;
List <Thread> threadList = new List <Thread>();
foreach (KeyValuePair <long, string> egoDBpair in egoList)
{
long egoID = egoDBpair.Key;
string dbPath = egoDBpair.Value;
if (alreadyPerformedEgoList.Contains(egoID) == true)
{
Console.WriteLine("Ego {0} Already Performend", egoID);
continue;
}
try
{
// one Thread to one DB
Program.dbSemaphore.WaitOne();
Console.WriteLine("Ego {0} Start", egoID);
experiment = new Experiment(dbPath);
Thread thread = new Thread(experiment.startPersonalizedPageRank);
pagaRankParameters = new personalizedPageRankThreadParamters(kFolds, nIterations, methodology);
thread.Start(pagaRankParameters);
threadList.Add(thread);
}
catch (Exception e)
{
Console.WriteLine(e.Message);
}
}
foreach (Thread thread in threadList)
{
thread.Join();
}
// Close Output file
Program.logger.Close();
}
// Execution Time
programStopwatch.Stop();
Console.WriteLine("Execution Time: " + Tools.getExecutionTime(programStopwatch));
Console.WriteLine("Finished!");
}
// Primary Methods
public void startPersonalizedPageRank(object parameterObject)
{
Stopwatch pageRankStopwatch = Stopwatch.StartNew();
// PageRank Environment Setting
personalizedPageRankThreadParamters parameters = (personalizedPageRankThreadParamters)parameterObject;
int nFold = parameters.kFold;
int nIteration = parameters.nIteration;
Methodology methodology = parameters.methodology;
try
{
// Get ego user's ID and his like count
long egoID = long.Parse(Path.GetFileNameWithoutExtension(this.dbPath));
// Final result to put the experimental result per fold together
this.finalResult = new Dictionary <EvaluationMetric, double>(); // <'HIT(0)', double> or <'AVGPRECISION(1)', double>
foreach (EvaluationMetric metric in Enum.GetValues(typeof(EvaluationMetric)))
{
this.finalResult.Add(metric, 0d); // Initialization
}
// Need to avoid the following error: "Collection was modified; enumeration operation may not execute"
metrics = new List <EvaluationMetric>(this.finalResult.Keys);
// K-Fold Cross Validation
kFoldSemaphore = new Semaphore(nFold, nFold);
List <Thread> kFoldThreadList = new List <Thread>(); // 'Thread': Standard Library Class
for (int fold = 0; fold < 1; fold++) // One fold to One thread
{
// Load graph information from database and then configurate the graph
DataLoader loader = new DataLoader(this.dbPath);
loader.setEgoNetwork();
loader.setEgoTimeline();
loader.splitTimelineToKfolds(nFold);
// |Friend|
this.numOfFriend = loader.getNumOfFriend();
// Multi-Threading
kFoldSemaphore.WaitOne(); // Wait until Semaphore released
Thread thread = new Thread(new ParameterizedThreadStart(runKfoldCrossValidation));
kFoldThreadParameter kFoldparameters = new kFoldThreadParameter(loader, methodology, fold, nIteration); // 'ThreadParams': defined in 'Experiment.cs'
thread.Start(kFoldparameters);
kFoldThreadList.Add(thread);
}
// Synchronization: Wait until threads be terminated
foreach (Thread thread in kFoldThreadList)
{
thread.Join();
}
if (Program.isValidTrainSet == false)
{
return;
}
// Result: <Ego ID>\t<Experi Code>\t<N-fold>\t<iteration>\t<MAP>\t<Recall>\t<|LIKE|>\t<|HIT|>\t<|Friend|>
pageRankStopwatch.Stop();
lock (Program.outFileLocker)
{
Program.logger.Write(egoID + "\t" + (int)methodology + "\t" + nFold + "\t" + nIteration);
foreach (EvaluationMetric metric in metrics)
{
switch (metric)
{
case EvaluationMetric.MAP:
Program.logger.Write("\t{0:F15}", (finalResult[metric] / 1));
break;
case EvaluationMetric.RECALL:
Program.logger.Write("\t{0:F15}", (finalResult[metric] / 1));
break;
case EvaluationMetric.LIKE:
Program.logger.Write("\t" + (finalResult[metric]));
break;
case EvaluationMetric.HIT:
Program.logger.Write("\t" + (finalResult[metric]));
break;
}
}
// |Friend|
Program.logger.Write("\t" + this.numOfFriend);
// Output Execution Time
Program.logger.WriteLine("\t" + Tools.getExecutionTime(pageRankStopwatch));
Program.logger.Flush();
// Console Output
Console.WriteLine("|Friend|: " + this.numOfFriend);
Console.WriteLine("Excution Time: " + Tools.getExecutionTime(pageRankStopwatch));
}
}
catch (Exception e)
{
Console.WriteLine(e.Message);
}
finally
{
Program.dbSemaphore.Release();
}
}