private void CalculateRoutingTables()
{
long startTime = DateTime.UtcNow.Ticks;
Time elapsedTime;
IInputAdapter[] inputAdapterCollection = null;
IActionAdapter[] actionAdapterCollection = null;
IOutputAdapter[] outputAdapterCollection = null;
bool retry = true;
OnStatusMessage("Starting measurement route calculation...");
// Attempt to cache input, action, and output adapters for routing table calculation.
// This could fail if another thread modifies the collections while caching is in
// progress (rare), so retry if the caching fails.
//
// We don't attempt to lock here because we don't own the collections.
while (retry)
{
try
{
if ((object)m_inputAdapters != null)
{
inputAdapterCollection = m_inputAdapters.ToArray <IInputAdapter>();
}
if ((object)m_actionAdapters != null)
{
actionAdapterCollection = m_actionAdapters.ToArray <IActionAdapter>();
}
if ((object)m_outputAdapters != null)
{
outputAdapterCollection = m_outputAdapters.ToArray <IOutputAdapter>();
}
retry = false;
}
catch (InvalidOperationException)
{
// Attempt to catch "Collection was modified; enumeration operation may not execute."
}
catch (NullReferenceException)
{
// Catch rare exceptions where IaonSession is disposed during a context switch
inputAdapterCollection = null;
actionAdapterCollection = null;
outputAdapterCollection = null;
retry = false;
}
}
try
{
HashSet <IAdapter> consumerAdapters;
HashSet <IAdapter> producerAdapters;
// Get a full list of all producer (input/action) adapters
producerAdapters = new HashSet <IAdapter>((inputAdapterCollection ?? Enumerable.Empty <IAdapter>())
.Concat(actionAdapterCollection ?? Enumerable.Empty <IAdapter>()));
// Get a full list of all consumer (action/output) adapters
consumerAdapters = new HashSet <IAdapter>((actionAdapterCollection ?? Enumerable.Empty <IAdapter>())
.Concat(outputAdapterCollection ?? Enumerable.Empty <IAdapter>()));
var producerChanges = new RoutingTablesAdaptersList(m_prevCalculatedProducers, producerAdapters);
var consumerChanges = new RoutingTablesAdaptersList(m_prevCalculatedConsumers, consumerAdapters);
m_routeMappingTables.PatchRoutingTable(producerChanges, consumerChanges);
m_prevCalculatedProducers = producerAdapters;
m_prevCalculatedConsumers = consumerAdapters;
// Start or stop any connect on demand adapters
HandleConnectOnDemandAdapters(new HashSet <MeasurementKey>(m_inputMeasurementKeysRestriction ?? Enumerable.Empty <MeasurementKey>()), inputAdapterCollection, actionAdapterCollection, outputAdapterCollection);
elapsedTime = Ticks.ToSeconds(DateTime.UtcNow.Ticks - startTime);
int routeCount = m_routeMappingTables.RouteCount;
int destinationCount = consumerAdapters.Count;
OnStatusMessage("Calculated {0} route{1} for {2} destination{3} in {4}.", routeCount, (routeCount == 1) ? "" : "s", destinationCount, (destinationCount == 1) ? "" : "s", elapsedTime.ToString(2));
}
catch (ObjectDisposedException)
{
// Ignore this error. Seems to happen during normal
// operation and does not affect the result.
}
catch (Exception ex)
{
OnProcessException(new InvalidOperationException("Routing tables calculation error: " + ex.Message, ex));
}
}
private void CalculateRoutingTables()
{
long startTime = DateTime.UtcNow.Ticks;
Time elapsedTime;
int destinationCount = 0;
int routeCount;
IInputAdapter[] inputAdapterCollection = null;
IActionAdapter[] actionAdapterCollection = null;
IOutputAdapter[] outputAdapterCollection = null;
bool retry = true;
OnStatusMessage("Starting measurement route calculation...");
// Attempt to cache input, action, and output adapters for routing table calculation.
// This could fail if another thread modifies the collections while caching is in
// progress (rare), so retry if the caching fails.
//
// We don't attempt to lock here because we don't own the collections.
while (retry)
{
try
{
if ((object)m_inputAdapters != null)
{
inputAdapterCollection = m_inputAdapters.ToArray <IInputAdapter>();
}
if ((object)m_actionAdapters != null)
{
actionAdapterCollection = m_actionAdapters.ToArray <IActionAdapter>();
}
if ((object)m_outputAdapters != null)
{
outputAdapterCollection = m_outputAdapters.ToArray <IOutputAdapter>();
}
retry = false;
}
catch (InvalidOperationException)
{
// Attempt to catch "Collection was modified; enumeration operation may not execute."
}
catch (NullReferenceException)
{
// Catch rare exceptions where IaonSession is disposed during a context switch
inputAdapterCollection = null;
actionAdapterCollection = null;
outputAdapterCollection = null;
retry = false;
}
}
try
{
GlobalCache globalCache;
Dictionary <Guid, List <Consumer> > globalSignalLookup;
Dictionary <IAdapter, Consumer> globalDestinationLookup;
List <Consumer> broadcastConsumers;
HashSet <IAdapter> producerAdapters;
IInputAdapter inputAdapter;
IEnumerable <IAdapter> consumerAdapters;
Consumer consumer;
// Get the global cache from the last routing tables calculation
globalCache = Interlocked.CompareExchange(ref m_globalCache, null, null);
// Create collections to be entered into the new global cache
globalSignalLookup = new Dictionary <Guid, List <Consumer> >();
globalDestinationLookup = new Dictionary <IAdapter, Consumer>();
broadcastConsumers = new List <Consumer>();
// Get a full list of all producer (input/action) adapters
producerAdapters = new HashSet <IAdapter>((inputAdapterCollection ?? Enumerable.Empty <IAdapter>())
.Concat(actionAdapterCollection ?? Enumerable.Empty <IAdapter>()));
// Attach to NewMeasurements event of all producer adapters
foreach (IAdapter producerAdapter in producerAdapters)
{
if ((object)globalCache == null || !globalCache.ProducerAdapters.Contains(producerAdapter))
{
inputAdapter = producerAdapter as IInputAdapter;
if ((object)inputAdapter != null)
{
inputAdapter.NewMeasurements += GetRoutedMeasurementsHandler();
}
else
{
((IActionAdapter)producerAdapter).NewMeasurements += GetRoutedMeasurementsHandler();
}
}
}
// Get a full list of all consumer (action/output) adapters
consumerAdapters = (actionAdapterCollection ?? Enumerable.Empty <IAdapter>())
.Concat(outputAdapterCollection ?? Enumerable.Empty <IAdapter>());
// Generate routes for all signals received by each consumer adapter
foreach (IAdapter consumerAdapter in consumerAdapters)
{
// Search the old global cache for an existing consumer for this adapter
if ((object)globalCache == null || !globalCache.GlobalDestinationLookup.TryGetValue(consumerAdapter, out consumer))
{
consumer = new Consumer(consumerAdapter, OnProcessException);
}
if ((object)consumerAdapter.InputMeasurementKeys != null)
{
// Create routes for each of the consumer's input signals
foreach (Guid signalID in consumerAdapter.InputMeasurementKeys.Select(key => key.SignalID))
{
globalSignalLookup.GetOrAdd(signalID, id => new List <Consumer>()).Add(consumer);
}
}
else
{
// Add this consumer to the broadcast routes to begin receiving all measurements
broadcastConsumers.Add(consumer);
}
// Add this adapter to the global destinations lookup
globalDestinationLookup.Add(consumerAdapter, consumer);
destinationCount++;
}
// Broadcast consumers receive all measurements, so add them to every signal route
foreach (List <Consumer> consumerList in globalSignalLookup.Values)
{
consumerList.AddRange(broadcastConsumers);
}
// Swap the new global cache with the old one and increment the version number
Interlocked.Exchange(ref m_globalCache, new GlobalCache()
{
ProducerAdapters = producerAdapters,
GlobalSignalLookup = globalSignalLookup,
GlobalDestinationLookup = globalDestinationLookup,
BroadcastConsumers = broadcastConsumers,
Version = (object)globalCache != null ? globalCache.Version + 1 : 0
});
// Start or stop any connect on demand adapters
HandleConnectOnDemandAdapters(new HashSet <MeasurementKey>(m_inputMeasurementKeysRestriction ?? Enumerable.Empty <MeasurementKey>()), inputAdapterCollection, actionAdapterCollection, outputAdapterCollection);
elapsedTime = Ticks.ToSeconds(DateTime.UtcNow.Ticks - startTime);
routeCount = globalSignalLookup.Count;
OnStatusMessage("Calculated {0} route{1} for {2} destination{3} in {4}.", routeCount, (routeCount == 1) ? "" : "s", destinationCount, (destinationCount == 1) ? "" : "s", elapsedTime.ToString(2));
}
catch (ObjectDisposedException)
{
// Ignore this error. Seems to happen during normal
// operation and does not affect the result.
}
catch (Exception ex)
{
OnProcessException(new InvalidOperationException("Routing tables calculation error: " + ex.Message, ex));
}
}