private IEnumerator <KeyValuePair <Key, Value> > GetEnumerator()
{
if (NextPageIndex < 0)
{
StopEnumerating = true;
yield break;
}
PageRecord page = ActiveManifest.FindPageForIndex(Level, NextPageIndex++);
if (page == null)
{
StopEnumerating = true;
yield break;
}
var sbt = new SortedBlockTable(Cache, BaseFileName, page.Level, page.Version);
try {
foreach (var pair in sbt.EnumerateFromKey(Cache, StartKey))
{
yield return(pair);
}
} finally {
sbt.Close();
}
}
public static bool Lookup(string baseFileName, int level, int version, RazorCache cache, Key key, out Value value, ExceptionHandling exceptionHandling, Action <string> logger)
{
PerformanceCounters.SBTLookup.Increment();
SortedBlockTable sbt = new SortedBlockTable(cache, baseFileName, level, version);
try {
byte[] lastScanKey;
int dataBlockNum = FindBlockForKey(baseFileName, level, version, cache, key, out lastScanKey);
if (dataBlockNum >= 0 && dataBlockNum < sbt._dataBlocks)
{
byte[] block = sbt.ReadBlock(LocalThreadAllocatedBlock(), dataBlockNum, lastScanKey);
return(sbt.ScanBlockForKey(block, key, out value));
}
} finally {
sbt.Close();
}
value = Value.Empty;
return(false);
}
public Key[] GetBlockTableIndex(string baseName, int level, int version)
{
string fileName = Config.SortedBlockTableFile(baseName, level, version);
Key[] index;
if (_blockIndexCache.TryGetValue(fileName, out index))
{
return(index);
}
PerformanceCounters.SBTGetBlockTableIndex.Increment();
var sbt = new SortedBlockTable(null, baseName, level, version);
try {
index = sbt.GetIndex();
_blockIndexCache.Set(fileName, index);
return(index);
} finally {
sbt.Close();
}
}
