private static bool MaximumTimeToLiveExpired(AdObjectCacheEntry <TADWrapperObject> entry)
{
return(DateTime.UtcNow.CompareTo(entry.MaximumTimeToExpire) > 0);
}
private TADWrapperObject LookupOrFindAdObject(string identifyingName, AdObjectLookupCache <TADWrapperObject> .FindAdObjectCacheFailure objectLookupFunction, AdObjectLookupFlags flags)
{
ExTraceGlobals.ActiveManagerClientTracer.TraceFunction <string>(0L, "LookupOrFindAdObject({0})", identifyingName);
AdObjectCacheEntry <TADWrapperObject> adObjectCacheEntry = null;
bool flag = false;
bool flag2 = (flags & AdObjectLookupFlags.ReadThrough) != AdObjectLookupFlags.None;
bool flag3 = false;
try
{
int num = 0;
while (num < 2 && !flag)
{
flag = this.m_rwLock.TryEnterReadLock(AdObjectLookupCache <TADWrapperObject> .CacheLockTimeout);
num++;
}
if (flag)
{
flag3 = this.m_cache.TryGetValue(identifyingName, out adObjectCacheEntry);
bool flag4 = false;
if (flag3)
{
flag4 = AdObjectLookupCache <TADWrapperObject> .ShouldExpireCacheEntry(adObjectCacheEntry);
ExTraceGlobals.ActiveManagerClientTracer.TraceDebug((long)this.GetHashCode(), "LookupOrFindAdObject( {0} ) was found in the cache: {1}, and shouldExpireEntry={2}, flags={3}", new object[]
{
identifyingName,
adObjectCacheEntry,
flag4,
flags
});
}
if (!flag3 || flag4)
{
flag2 = true;
}
}
else
{
AdObjectLookupCache <TADWrapperObject> .Tracer.TraceError((long)this.GetHashCode(), "Timeout waiting for the read lock in AdObjectLookupCache.LookupOrFindAdObject()");
flag2 = true;
}
}
finally
{
if (flag)
{
this.m_rwLock.ExitReadLock();
}
}
if (flag2)
{
bool flag5 = false;
bool flag6 = false;
TADWrapperObject updatedObject = default(TADWrapperObject);
try
{
flag5 = this.CheckAndSetADLock(identifyingName);
if (flag5)
{
InvokeWithTimeout.Invoke(delegate()
{
updatedObject = objectLookupFunction();
}, this.m_adOperationTimeout);
}
else if (!flag3 || AdObjectLookupCache <TADWrapperObject> .MaximumTimeToLiveExpired(adObjectCacheEntry))
{
int num2 = 10;
int num3 = 10;
for (int i = 0; i < num3; i++)
{
Thread.Sleep(num2);
bool flag7 = false;
try
{
int num4 = 0;
while (num4 < 2 && !flag7)
{
flag7 = this.m_rwLock.TryEnterReadLock(AdObjectLookupCache <TADWrapperObject> .CacheLockTimeout);
num4++;
}
if (flag7)
{
flag3 = this.m_cache.TryGetValue(identifyingName, out adObjectCacheEntry);
}
}
finally
{
if (flag7)
{
this.m_rwLock.ExitReadLock();
}
}
if (flag3 && !AdObjectLookupCache <TADWrapperObject> .MaximumTimeToLiveExpired(adObjectCacheEntry))
{
if (AdObjectLookupCache <TADWrapperObject> .LogAdLatency)
{
StorageGlobals.EventLogger.LogEvent(StorageEventLogConstants.Tuple_ActiveManagerClientAnotherThreadCompleted, identifyingName, new object[]
{
identifyingName,
num2 * i
});
}
AdObjectLookupCache <TADWrapperObject> .Tracer.TraceDebug <string>((long)this.GetHashCode(), "Another thread finished doing query for object {0}.", identifyingName);
flag6 = true;
break;
}
}
if (!flag3 || AdObjectLookupCache <TADWrapperObject> .MaximumTimeToLiveExpired(adObjectCacheEntry))
{
StorageGlobals.EventLogger.LogEvent(StorageEventLogConstants.Tuple_ActiveManagerClientAnotherThreadInADCallTimeout, identifyingName, new object[]
{
identifyingName,
num2 * num3
});
AdObjectLookupCache <TADWrapperObject> .Tracer.TraceDebug <string, int>((long)this.GetHashCode(), "Another thread doing query for object {0}, however this thread didn't complete in {1} msec.", identifyingName, num2 *num3);
updatedObject = objectLookupFunction();
}
}
else
{
if (AdObjectLookupCache <TADWrapperObject> .LogAdLatency)
{
StorageGlobals.EventLogger.LogEvent(StorageEventLogConstants.Tuple_ActiveManagerClientAnotherThreadInADCall, identifyingName, new object[]
{
identifyingName
});
}
AdObjectLookupCache <TADWrapperObject> .Tracer.TraceDebug <string>((long)this.GetHashCode(), "Another thread doing query for object {0}.", identifyingName);
flag6 = true;
}
}
catch (TimeoutException ex)
{
StorageGlobals.EventLogger.LogEvent(StorageEventLogConstants.Tuple_ErrorActiveManagerClientADTimeout, identifyingName, new object[]
{
identifyingName,
this.m_adOperationTimeout
});
AdObjectLookupCache <TADWrapperObject> .Tracer.TraceError <string>((long)this.GetHashCode(), "Timeout on ad query: {0}", ex.Message);
flag6 = true;
}
finally
{
if (flag5)
{
this.ReleaseADLock(identifyingName);
}
}
if (updatedObject != null && this.MinimizeObjects)
{
updatedObject.Minimize();
}
adObjectCacheEntry = new AdObjectCacheEntry <TADWrapperObject>(updatedObject, this.m_timeToLive, this.m_timeToNegativeLive, this.m_maximumTimeToLive);
bool flag8 = false;
try
{
int num5 = 0;
while (num5 < 2 && !flag8)
{
flag8 = this.m_rwLock.TryEnterWriteLock(AdObjectLookupCache <TADWrapperObject> .CacheLockTimeout);
num5++;
}
if (flag8)
{
if (updatedObject == null && flag6)
{
AdObjectCacheEntry <TADWrapperObject> adObjectCacheEntry2 = null;
flag3 = this.m_cache.TryGetValue(identifyingName, out adObjectCacheEntry2);
if (flag3 && !AdObjectLookupCache <TADWrapperObject> .MaximumTimeToLiveExpired(adObjectCacheEntry2))
{
adObjectCacheEntry = adObjectCacheEntry2;
ExTraceGlobals.ActiveManagerClientTracer.TraceDebug <TADWrapperObject, AdObjectCacheEntry <TADWrapperObject> >((long)this.GetHashCode(), "New ad object was not found, but found possibly stale result '{0}' in the cache as {1}.", adObjectCacheEntry.AdObjectData, adObjectCacheEntry);
}
else
{
flag6 = false;
}
}
if (!flag6)
{
this.m_cache[identifyingName] = adObjectCacheEntry;
ExTraceGlobals.ActiveManagerClientTracer.TraceDebug <TADWrapperObject, AdObjectCacheEntry <TADWrapperObject> >((long)this.GetHashCode(), "Stored object '{0}' in the cache as {1}.", adObjectCacheEntry.AdObjectData, adObjectCacheEntry);
}
}
else
{
AdObjectLookupCache <TADWrapperObject> .Tracer.TraceError((long)this.GetHashCode(), "Timeout waiting for write lock in AdObjectLookupCache.LookupOrFindAdObject()");
}
}
finally
{
if (flag8)
{
this.m_rwLock.ExitWriteLock();
}
}
}
return(adObjectCacheEntry.AdObjectData);
}
private static bool ShouldExpireCacheEntry(AdObjectCacheEntry <TADWrapperObject> entry)
{
return(DateTime.UtcNow.CompareTo(entry.TimeToExpire) > 0);
}
