Ejemplo n.º 1
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        /// <summary>
        /// Create a new metric instance for the provided performance counter object
        /// </summary>
        /// <remarks>This will create a new performance counter metric object, add it to this collection, and return it in one call.</remarks>
        /// <param name="newPerfCounter">The windows performance counter to add</param>
        /// <returns>The newly created performance counter metric packet object</returns>
        public PerfCounterMetric Add(PerformanceCounter newPerfCounter)
        {
            //just do the null check - everything else we do in the base object add
            if (newPerfCounter == null)
            {
                throw new ArgumentNullException(nameof(newPerfCounter), "A performance counter object must be provided to add it to the collection.");
            }

            //we first need to go waltz off and find the definition for this guy
            string key = PerfCounterMetricDefinition.GetKey(newPerfCounter);

            //if this key doesn't match our key then we have a problem - it isn't for our collection
            if (base.Definition.Name != key)
            {
                throw new ArgumentOutOfRangeException(nameof(newPerfCounter));
            }

            //New object - go ahead and create it for us.
            PerfCounterMetric newPerfCounterMetric = new PerfCounterMetric((PerfCounterMetricDefinition)base.Definition, newPerfCounter);

            //we do NOT add it to our collection - it JUST DID THAT in the constructor.  If we do it again, we'll get an exception

            //finally, return the performance counter packet object to our caller so they can find it easily.
            return(newPerfCounterMetric);
        }
Ejemplo n.º 2
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        /// <summary>Creates a new performance counter metric instance or returns an existing one from the provided definition information, or returns any existing instance if found.</summary>
        /// <remarks>If the metric definition doesn't exist, it will be created.  If the metric doesn't exist, it will be created.
        /// If the metric definition does exist, but is not a Performance Counter Metric (or a derived class) an exception will be thrown.</remarks>
        /// <param name="newPerformanceCounter">The windows performance counter to add a definition for</param>
        /// <param name="alias">An alias to use to determine the instance name instead of the instance of the supplied counter.</param>
        /// <returns>The Performance Counter Metric object for the specified instance.</returns>
        public static PerfCounterMetric AddOrGet(PerformanceCounter newPerformanceCounter, PerfCounterInstanceAlias alias)
        {
            //we need to find the definition, adding it if necessary
            string            definitionKey = PerfCounterMetricDefinition.GetKey(newPerformanceCounter);
            IMetricDefinition definition;

            if (Log.Metrics.TryGetValue(definitionKey, out definition))
            {
                //if the metric definition exists, but is of the wrong type we have a problem.
                if ((definition is PerfCounterMetricDefinition) == false)
                {
                    throw new ArgumentException("A metric already exists with the provided type, category, and counter name but it is not compatible with being a performance counter metric.  This indicates a programming error in a client application or Gibraltar.");
                }
            }
            else
            {
                //we didn't find one, make a new one
                definition = new PerfCounterMetricDefinition(Log.Metrics, newPerformanceCounter);
            }

            //now we have our definition, proceed to create a new metric if it doesn't exist
            //Interesting note:  here is where we basically lock in an alias to be its initial value.
            string  metricKey = GetKey(newPerformanceCounter);
            IMetric metric;

            //see if we can get the metric already.  If not, we'll create it
            lock (((MetricCollection)definition.Metrics).Lock) //make sure the get & add are atomic
            {
                if (definition.Metrics.TryGetValue(metricKey, out metric) == false)
                {
                    metric = new PerfCounterMetric((PerfCounterMetricDefinition)definition, newPerformanceCounter, alias);
                }
            }

            return((PerfCounterMetric)metric);
        }
Ejemplo n.º 3
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 /// <summary>
 /// Create a new performance counter metric object from the provided raw data packet
 /// </summary>
 /// <remarks>The new metric will automatically be added to the metric definition's metrics collection.</remarks>
 /// <param name="definition">The object that defines this metric</param>
 /// <param name="packet">The raw data packet</param>
 internal PerfCounterMetric(PerfCounterMetricDefinition definition, PerfCounterMetricPacket packet)
     : base(definition, packet)
 {
     m_InstanceAlias = PerfCounterInstanceAlias.None;
     m_PollingState  = PerfCounterPollingState.Inactive;
 }
Ejemplo n.º 4
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 /// <summary>
 /// Create a new performance counter metric object from the provided windows performance counter
 /// </summary>
 /// <remarks>The new metric will automatically be added to the metric definition's metrics collection.</remarks>
 /// <param name="definition">The metric definition for the provided windows performance counter</param>
 /// <param name="counter">The windows performance counter to add as a metric</param>
 /// <param name="alias">An alias to use to determine the instance name instead of the instance of the supplied counter.</param>
 public PerfCounterMetric(PerfCounterMetricDefinition definition, PerformanceCounter counter, PerfCounterInstanceAlias alias)
     : base(definition, new PerfCounterMetricPacket(definition.Packet, counter))
 {
     m_InstanceAlias = alias;
     m_PollingState  = PerfCounterPollingState.Inactive;
 }
Ejemplo n.º 5
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 /// <summary>
 /// Create a new performance counter metric dictionary for the provided definition.
 /// </summary>
 /// <remarks>This dictionary is created automatically by the Metric Definition during its initialization.</remarks>
 /// <param name="metricDefinition"></param>
 internal PerfCounterMetricCollection(PerfCounterMetricDefinition metricDefinition)
     : base(metricDefinition)
 {
 }