// 'updatePerfCounters' defaults to true since this method is called by all Get() operations
// to update both the performance counters and the sliding expiration. Callers that perform
// nested sliding expiration updates (like a MemoryCacheEntry touching its update sentinel)
// can pass false to prevent these from unintentionally showing up in the perf counters.
internal void UpdateExpAndUsage(MemoryCacheEntry entry, bool updatePerfCounters = true)
{
if (entry != null)
{
if (entry.InUsage() || entry.SlidingExp > TimeSpan.Zero)
{
DateTime utcNow = DateTime.UtcNow;
entry.UpdateSlidingExp(utcNow, _expires);
entry.UpdateUsage(utcNow, _usage);
}
// DevDiv #67021: If this entry has an update sentinel, the sliding expiration is actually associated
// with that sentinel, not with this entry. We need to update the sentinel's sliding expiration to
// keep the sentinel from expiring, which in turn would force a removal of this entry from the cache.
entry.UpdateSlidingExpForUpdateSentinel();
if (updatePerfCounters && _perfCounters != null)
{
_perfCounters.Increment(PerfCounterName.Hits);
_perfCounters.Increment(PerfCounterName.HitRatio);
_perfCounters.Increment(PerfCounterName.HitRatioBase);
}
}
else
{
if (updatePerfCounters && _perfCounters != null)
{
_perfCounters.Increment(PerfCounterName.Misses);
_perfCounters.Increment(PerfCounterName.HitRatioBase);
}
}
}
// 'updatePerfCounters' defaults to true since this method is called by all Get() operations
// to update both the performance counters and the sliding expiration. Callers that perform
// nested sliding expiration updates (like a MemoryCacheEntry touching its update sentinel)
// can pass false to prevent these from unintentionally showing up in the perf counters.
internal void UpdateExpAndUsage(MemoryCacheEntry entry, bool updatePerfCounters = true) {
if (entry != null) {
if (entry.InUsage() || entry.SlidingExp > TimeSpan.Zero) {
DateTime utcNow = DateTime.UtcNow;
entry.UpdateSlidingExp(utcNow, _expires);
entry.UpdateUsage(utcNow, _usage);
}
// DevDiv #67021: If this entry has an update sentinel, the sliding expiration is actually associated
// with that sentinel, not with this entry. We need to update the sentinel's sliding expiration to
// keep the sentinel from expiring, which in turn would force a removal of this entry from the cache.
entry.UpdateSlidingExpForUpdateSentinel();
if (updatePerfCounters && _perfCounters != null) {
_perfCounters.Increment(PerfCounterName.Hits);
_perfCounters.Increment(PerfCounterName.HitRatio);
_perfCounters.Increment(PerfCounterName.HitRatioBase);
}
}
else {
if (updatePerfCounters && _perfCounters != null) {
_perfCounters.Increment(PerfCounterName.Misses);
_perfCounters.Increment(PerfCounterName.HitRatioBase);
}
}
}