/// <summary>
/// Increments a performance counter for average Hive query duration, if this instance has been given
/// a reference to a performance counter object.
/// </summary>
/// <param name="ticks">The ticks.</param>
/// <remarks>Performance counting is optional and so this instance may have been instantiated without a reference to
/// a performance counter proxy, in which case this method fails silently.</remarks>
private void CountResolveProviderMap(long ticks)
{
if (PerfCounterManager != null)
{
PerfCounterManager.IncrementDuration(HivePreDefinedCounters.AverageHiveQueryDuration,
HivePreDefinedCounters.AverageHiveQueryDurationBase, ticks);
}
}
/// <summary>
/// Default constructor to initialize
/// an instance of the cache.
/// </summary>
public XmlSerializerCache()
{
SyncRoot = new object();
#if USE_PERF_COUNTER
stats = new PerfCounterManager();
#endif
//Serializers = new Dictionary<string, System.Xml.Serialization.XmlSerializer>();
Serializers = new System.Collections.Generic.Dictionary <string, XmlSerializer>();
}
public void InstanceCount()
{
string instanceName = GetCounterInstanceName(0);
using (PerfCounterManager manager = new PerfCounterManager())
{
using (PerformanceCounter counter = new PerformanceCounter(CATEGORY
, CACHED_INSTANCES_NAME
, instanceName
, true))
{
Assert.IsNotNull(counter);
Assert.AreEqual(0.0, (decimal)counter.NextValue());
manager.IncrementInstanceCount();
Assert.AreEqual(1.0, (decimal)counter.NextValue());
}
}
using (PerformanceCounter counter = new PerformanceCounter(CATEGORY
, CACHED_INSTANCES_NAME
, instanceName
, true))
{
try
{
long l = counter.RawValue;
}
catch (InvalidOperationException)
{
// the counter instance went away when we
// disposed the manager object.
// This exception is what we wanted.
}
}
}
