internal static ISIndexer GetDataCache()
{
ObjectCache cache = MemoryCache.Default;
ISIndexer data = null;
// mettiamo in cache le informazioni di base
if (!cache.Contains(searchCachePrefix, null))
{
CacheItemPolicy cacheItemPolicy = new CacheItemPolicy
{
SlidingExpiration = ObjectCache.NoSlidingExpiration,
AbsoluteExpiration = DateTime.UtcNow.AddMinutes(cacheDuration) // usa UtcNow per evitare problemi con le TZ
};
data = new ISIndexer(
System.Configuration.ConfigurationManager.AppSettings["indexFolder"],
IndexerStorageMode.FSRAM,
IndexerAnalyzer.StandardAnalyzer);
cache.Set(searchCachePrefix, data, cacheItemPolicy);
}
else
{
data = (cache[searchCachePrefix] as ISIndexer);
}
return(data);
}
static void Main(string[] args)
{
CommandLineArgs ca = new CommandLineArgs(args);
if (ca.Arguments.Count < 1 && ca.Options.Count < 1)
{
Usage();
Environment.Exit(1);
}
SampleDataFeed fd = new SampleDataFeed();
bool reset = ca.Options.IsOptionEnabled("reset");
bool index = ca.Options.IsOptionEnabled("index");
bool forceindex = index && ca.Options["index"] == "force";
bool updateindex = index && ca.Options["index"] == "update";
bool usescoring = ca.Options.IsOptionEnabled("withscore");
if (reset)
{
fd.BuildStaticDataFeed();
}
IndexerStorageMode mode = IndexerStorageMode.FS;
if (ca.Options.IsOptionEnabled("mode"))
{
if (ca.Options["mode"] == "ram")
{
mode = IndexerStorageMode.RAM;
}
else if (ca.Options["mode"] == "fsram")
{
mode = IndexerStorageMode.FSRAM;
}
}
bool doReindex = reset || (mode == IndexerStorageMode.RAM) || (mode != IndexerStorageMode.RAM && forceindex) || updateindex;
Console.Write("Loading indexer in {0} mode... ", mode);
long m0 = GC.GetTotalMemory(false);
ISIndexer li = new ISIndexer(mode, IndexerAnalyzer.StandardAnalyzer);
Console.WriteLine(" done.");
if (doReindex)
{
Console.Write("Data reindexing had been requested: ");
int origRow = Console.CursorTop;
int origCol = Console.CursorLeft;
ConsoleUtils.WriteAt("loading data feed", 0, 0, origRow, origCol);
List <StaticDataFeed> data = fd.ReadStaticDataFeed();
if (reset || forceindex)
{
li.ClearAllIndex();
}
int i = 1;
foreach (StaticDataFeed f in data)
{
ConsoleUtils.WriteAt(String.Format("indexing item {0} ", i), 0, 0, origRow, origCol);
li.AddUpdateLuceneIndex(f.ToIXDescriptor());
i++;
}
li.UpdateMemoryIndexFromFS();
data.Clear();
data = null;
GC.Collect();
ConsoleUtils.WriteAt(" completed. ", 0, 0, origRow, origCol);
Console.WriteLine();
}
long m1 = GC.GetTotalMemory(false);
Console.WriteLine("Index is using {0} kB of RAM", (m1 - m0) > 0 ? (m1 - m0) / (long)1024 : 0);
if (mode == IndexerStorageMode.FSRAM && ca.Options.IsOptionEnabled("simfsramrefresh"))
{
Console.WriteLine("Simulate index refresh: {0}", li.UpdateMemoryIndexFromFS());
}
if (ca.Arguments.Count > 0 && ca.Arguments[0] == "search")
{
Console.WriteLine("[press a key to execute search]");
Console.ReadLine();
IXRequest req = new IXRequest(ca.Arguments[1], 0, -1, (usescoring) ? IXRequestFlags.None : IXRequestFlags.UseScore);
DateTime t1 = DateTime.Now;
IXQueryCollection reply = li.Search(req);
DateTime t2 = DateTime.Now;
if (reply.Status == IXQueryStatus.Success)
{
foreach (IXQuery r in reply.Results)
{
Console.WriteLine("Result matching{2}: {0} \"{1}\"", r["id"].String, r["titolo"].String, (usescoring) ? String.Format(" at {0:n2}%", r.Score) : String.Empty);
}
}
Console.WriteLine("Search stats: scope:{0} items status:{2} time:{1}ms results:{3} items", li.IndexSize, Convert.ToInt32((t2 - t1).TotalMilliseconds), reply.Status, reply.Count);
}
}
public InfoStreamService()
{
indexer = CacheManager.GetDataCache();
}
