private static bool MaximumTimeToLiveExpired(MiniClientAccessServerOrArrayCacheEntry entry)
{
return(DateTime.UtcNow.CompareTo(entry.MaximumTimeToExpire) > 0);
}
private IADMiniClientAccessServerOrArray LookupOrFindMiniClientAccessServerOrArray(string serverKey, FindMiniClientAccessServerOrArrayCacheFailure serverLookup)
{
ExTraceGlobals.ActiveManagerClientTracer.TraceFunction <string>(0L, "LookupOrFindMiniClientAccessServerOrArray({0})", serverKey);
MiniClientAccessServerOrArrayCacheEntry miniClientAccessServerOrArrayCacheEntry = null;
bool flag = false;
bool flag2 = false;
try
{
flag = this.m_rwLock.TryEnterReadLock(MiniClientAccessServerOrArrayLookupCache.CacheLockTimeout);
if (flag)
{
bool flag3 = this.m_cache.TryGetValue(serverKey, out miniClientAccessServerOrArrayCacheEntry);
bool flag4 = false;
if (flag3)
{
flag4 = MiniClientAccessServerOrArrayLookupCache.ShouldExpireCacheEntry(miniClientAccessServerOrArrayCacheEntry);
ExTraceGlobals.ActiveManagerClientTracer.TraceDebug <string, MiniClientAccessServerOrArrayCacheEntry, bool>((long)this.GetHashCode(), "LookupOrFindMiniClientAccessServerOrArray( {0} ) was found in the cache: {1}, and shouldExpireEntry={2}", serverKey, miniClientAccessServerOrArrayCacheEntry, flag4);
}
if (!flag3 || flag4)
{
flag2 = true;
MiniClientAccessServerOrArrayLookupCache.m_perfCounters.GetServerForDatabaseClientServerInformationCacheMisses.Increment();
}
else
{
MiniClientAccessServerOrArrayLookupCache.m_perfCounters.GetServerForDatabaseClientServerInformationCacheHits.Increment();
}
}
else
{
MiniClientAccessServerOrArrayLookupCache.Tracer.TraceError((long)this.GetHashCode(), "Timeout waiting for the read lock in MiniClientAccessServerOrArrayLookupCache.LookupOrFindAdObject()");
flag2 = true;
}
}
finally
{
if (flag)
{
this.m_rwLock.ExitReadLock();
}
}
if (flag2)
{
bool flag5 = false;
IADMiniClientAccessServerOrArray updatedServer = null;
try
{
InvokeWithTimeout.Invoke(delegate()
{
updatedServer = serverLookup();
}, this.m_adOperationTimeout);
}
catch (TimeoutException ex)
{
StorageGlobals.EventLogger.LogEvent(StorageEventLogConstants.Tuple_ErrorActiveManagerClientADTimeout, serverKey, new object[]
{
serverKey,
this.m_adOperationTimeout
});
MiniClientAccessServerOrArrayLookupCache.Tracer.TraceError <string>((long)this.GetHashCode(), "Timeout on ad query: {0}", ex.Message);
flag5 = true;
}
miniClientAccessServerOrArrayCacheEntry = new MiniClientAccessServerOrArrayCacheEntry(updatedServer, this.m_timeToLive, this.m_timeToNegativeLive, this.m_maximumTimeToLive);
bool flag6 = false;
try
{
flag6 = this.m_rwLock.TryEnterWriteLock(MiniClientAccessServerOrArrayLookupCache.CacheLockTimeout);
if (flag6)
{
if (updatedServer == null && flag5)
{
MiniClientAccessServerOrArrayCacheEntry miniClientAccessServerOrArrayCacheEntry2 = null;
bool flag7 = this.m_cache.TryGetValue(serverKey, out miniClientAccessServerOrArrayCacheEntry2);
if (flag7 && !MiniClientAccessServerOrArrayLookupCache.MaximumTimeToLiveExpired(miniClientAccessServerOrArrayCacheEntry2))
{
miniClientAccessServerOrArrayCacheEntry = miniClientAccessServerOrArrayCacheEntry2;
ExTraceGlobals.ActiveManagerClientTracer.TraceDebug <IADMiniClientAccessServerOrArray, MiniClientAccessServerOrArrayCacheEntry>((long)this.GetHashCode(), "New ad object was not found, but found possibly stale result '{0}' in the cache as {1}.", miniClientAccessServerOrArrayCacheEntry.MiniClientAccessServerOrArrayData, miniClientAccessServerOrArrayCacheEntry);
}
else
{
flag5 = false;
}
}
if (!flag5)
{
this.m_cache[serverKey] = miniClientAccessServerOrArrayCacheEntry;
ExTraceGlobals.ActiveManagerClientTracer.TraceDebug <IADMiniClientAccessServerOrArray, MiniClientAccessServerOrArrayCacheEntry>((long)this.GetHashCode(), "Stored server '{0}' in the cache as {1}.", miniClientAccessServerOrArrayCacheEntry.MiniClientAccessServerOrArrayData, miniClientAccessServerOrArrayCacheEntry);
}
}
else
{
MiniClientAccessServerOrArrayLookupCache.Tracer.TraceError((long)this.GetHashCode(), "Timeout waiting for write lock in MiniServerLookupCache.LookupOrFindAdObject()");
}
}
finally
{
if (flag6)
{
this.m_rwLock.ExitWriteLock();
}
}
}
MiniClientAccessServerOrArrayLookupCache.m_perfCounters.GetServerForDatabaseClientServerInformationCacheEntries.RawValue = (long)this.m_cache.Count;
return(miniClientAccessServerOrArrayCacheEntry.MiniClientAccessServerOrArrayData);
}
private static bool ShouldExpireCacheEntry(MiniClientAccessServerOrArrayCacheEntry entry)
{
return(DateTime.UtcNow.CompareTo(entry.TimeToExpire) > 0);
}
