private ArrayList<ArrayList<QueryToken>> ConvertSearchToStreamingQuery(ArrayList<ArrayList<QueryToken>> disjuncts, TwitterProfiler twitterProfiler)
{
ArrayList<ArrayList<QueryToken>> finalQueryList = new ArrayList<ArrayList<QueryToken>>();
QueryConverterUtils.ExtractUniqueQueryTokens(disjuncts, finalQueryList, Convert.ToDouble(ConfigurationManager.AppSettings["TwitterProfilerThreshold"]));
if (disjuncts.Count > 0)
{
Console.WriteLine("\nError: Count of disjuncts should be zero, instead it is {0}!", disjuncts.Count());
System.Environment.Exit(1);
}
return finalQueryList;
}
public void ConvertSearchToStreamingConfig(string filePathIn, string filePathOut)
{
List<QueryGroupCollection> queryGroupCollection = GetSearchQueries(filePathIn);
TwitterProfiler twitterProfiler = new TwitterProfiler();
foreach (var collection in queryGroupCollection)
foreach (var group in collection.queryGroups)
{
string combinedQuery = "";
foreach (var query in group.queries)
combinedQuery += "(" + query.query + ") OR ";
if (combinedQuery != "")
{
combinedQuery = Regex.Replace(combinedQuery, @" OR $", "");
ArrayList<ArrayList<QueryToken>> tokenizedSearchQueries = TokenizeQuery(combinedQuery);
group.tokenizedStreamingQueries = ConvertSearchToStreamingQuery(tokenizedSearchQueries, twitterProfiler);
QueryConverterUtils.ShortenStreamingQueries(group.tokenizedStreamingQueries, twitterProfiler);
group.streamingQuery = TokenizedStreamingQueryToString(group.tokenizedStreamingQueries);
}
}
ExportStreamingConfig(queryGroupCollection, filePathOut);
}
public static void ShortenStreamingQueries(ArrayList<ArrayList<QueryToken>> tokenizedQueries, TwitterProfiler twitterProfiler)
{
// check that the length of each query satisfies twitter's streaming API requirements
foreach (var item in tokenizedQueries)
{
int queryLength = item.Sum(x => x.ToString().Length);
int spacesLength = (item.Count - 1); // (item.Count - 1) is the number of spaces in the eported string streaming query (see ConfigParser.TokenizedStreamingQueryToString())
int itemsRemoved = 0;
while (queryLength + spacesLength > Convert.ToInt32(ConfigurationManager.AppSettings["TwitterStreamingAPIMaxQueryLength"]))
{
List<double> frequencies = new List<double>();
for (int i = 0; i < item.Count; ++i)
{
var itemCopy = new ArrayList<QueryToken>(item);
itemCopy.RemoveAt(i);
double freq = TwitterProfiler.ProfileFrequency(TwitterProfiler.QueryTokensToStringConverter(itemCopy));
if (Math.Round(freq) == Convert.ToInt32(TwitterProfiler.InvalidReturns.Exception))
{
Console.WriteLine("\nShortenStreamingQueries: Error during twitter profiling: {0}!", TwitterProfiler.GetExceptionError());
System.Environment.Exit(1);
}
frequencies.Add(freq);
}
int minFreqIdx = frequencies.IndexOf(frequencies.Min());
frequencies.RemoveAt(minFreqIdx);
item.RemoveAt(minFreqIdx);
itemsRemoved++;
queryLength = item.Sum(x => x.ToString().Length);
spacesLength = (item.Count - 1);
if (item.Count == 1 && queryLength > Convert.ToInt32(ConfigurationManager.AppSettings["TwitterStreamingAPIMaxQueryLength"]))
{
item.Clear();
itemsRemoved++;
break;
}
}
if (itemsRemoved > 0)
Console.WriteLine("\nWARNING: {0} out of {1} tokens were removed from a query to reduce its length to the required size!\n", itemsRemoved, item.Count + itemsRemoved);
}
}
