/// <summary>
/// Adds an event to an array. If the array is full it is posted to the parent and a new array is created
/// </summary>
/// <param name="e"></param>
private void AddToCurrentArray(NodeLoggingEvent e)
{
eventArray[current] = e;
current++;
if (current == eventArrayChunkSize)
{
parentNode.PostLoggingMessagesToHost(eventArray);
eventArray = new NodeLoggingEvent[eventArrayChunkSize];
current = 0;
}
}
/// <summary>
/// This function logs out all the messages currently posted to the queue. The active queue is swapped
/// with the secondary queue to enable posting of messages while this function is running
/// </summary>
override internal bool ProcessPostedLoggingEvents()
{
bool processedEvents = false;
lastFlushTime = DateTime.Now.Ticks;
// Process all the events posted with a logger Id
NodeLoggingEvent nodeLoggingEvent = null;
// We may get a single event for multiple messages
while ((nodeLoggingEvent = loggingQueueOfNodeEvents.Dequeue()) != null)
{
int loggerId = nodeLoggingEvent.LoggerId;
if (loggerId != ALL_PRIVATE_EVENTSOURCES)
{
ErrorUtilities.VerifyThrow(eventSources.ContainsKey(loggerId), "Logger Id should be registered");
ErrorUtilities.VerifyThrow(loggerId != LOCAL_FORWARDING_EVENTSOURCE, "Should not use FWD loggers");
eventSources[loggerId].RaiseStronglyTypedEvent(nodeLoggingEvent.BuildEvent);
}
else
{
// Post event to all central loggers
foreach (KeyValuePair <int, EventSource> eventSource in eventSources)
{
if (eventSource.Key >= FIRST_AVAILABLE_LOGGERID)
{
eventSource.Value.RaiseStronglyTypedEvent(nodeLoggingEvent.BuildEvent);
}
}
}
processedEvents = true;
}
// Process all the events in that have been already posted
BuildEventArgs buildEventArgs = null;
// We may get a single event for multiple messages
while ((buildEventArgs = loggingQueueOfBuildEvents.Dequeue()) != null)
{
ProcessBuildEvent(buildEventArgs);
processedEvents = true;
}
requestedQueueFlush = false;
return(processedEvents);
}
/// <summary>
/// The out of proc logging service is concerned with flushing the events out to the node provider
/// to be sent to the parent engine. Events which are not marked with a logger id end up being wrapped
/// in a NodeLoggingEvent which was a default loggerId of 0. All events posted as BuildEventArgs fall
/// into this category. Events with a loggerId need be posted as NodeLoggerEventWithLoggerId objects.
/// This function is thread safe and is called both from the engine thread and communication threads to
/// ensure that the events are delivered in coherent order.
/// </summary>
override internal bool ProcessPostedLoggingEvents()
{
lock (loggingQueueReadLock)
{
bool processedEvents = false;
lastFlushTime = DateTime.Now.Ticks;
// We use a local array to hold the items that will be dequeueed. We can't reuse the queues because
// we give up the control of the data structure once we pass it to the node provider and we also need to maintain
// order between buildEventArgs and nodeLoggingEvent.
current = 0;
// Process all the events in that have been already posted
BuildEventArgs buildEventArgs = null;
// Grab all the event args out of the queue
while ((buildEventArgs = loggingQueueOfBuildEvents.Dequeue()) != null)
{
AddToCurrentArray(new NodeLoggingEvent(buildEventArgs));
processedEvents = true;
}
// Grab all the forwarded events
NodeLoggingEvent nodeLoggingEvent = null;
while ((nodeLoggingEvent = loggingQueueOfNodeEvents.Dequeue()) != null)
{
AddToCurrentArray(nodeLoggingEvent);
processedEvents = true;
}
// If there are event - post them to the parent
if (current != 0)
{
NodeLoggingEvent [] trimmedEventArray = new NodeLoggingEvent[current];
Array.Copy(eventArray, trimmedEventArray, current);
parentNode.PostLoggingMessagesToHost(trimmedEventArray);
current = 0;
}
requestedQueueFlush = false;
return(processedEvents);
}
}
/// <summary>
/// Called to add a logging event to the posting queue.
/// </summary>
/// <param name="e"></param>
internal void PostLoggingEvent(NodeLoggingEvent e)
{
ErrorUtilities.VerifyThrowArgumentNull(e, "e");
if (paused)
{
// Throw out the event
return;
}
// queue the event
loggingQueueOfNodeEvents.Enqueue(e);
if (!requestedQueueFlush && loggingQueueOfNodeEvents.WritingQueueCount > flushQueueSize)
{
requestedQueueFlush = true;
flushRequestEvent.Set();
}
}
internal void CreateFromStream(BinaryReader reader, Hashtable loggingTypeCache)
{
base.CreateFromStream(reader);
int numberOfNodeEvents = reader.ReadInt32();
buildEvents = new NodeLoggingEvent[numberOfNodeEvents];
for (int i = 0; i < numberOfNodeEvents; i++)
{
NodeLoggingEvent e = null;
if (reader.ReadByte() == 0)
{
e = new NodeLoggingEvent();
}
else
{
e = new NodeLoggingEventWithLoggerId();
}
e.CreateFromStream(reader, loggingTypeCache);
buildEvents[i] = e;
}
}
