/// <summary>
/// Obtain the next execution entity and remove it from pending.
/// Children to override to manage the way operations are performed, if they need to.
/// This is where currently the MultiThreads per client protection is performed.
/// </summary>
protected virtual ExecutionEntity PopNextExecutionEntity()
{
lock (this)
{
// Check total executioners count.
if (_threadPool.FreeThreadsCount < 2)
{
//if ((DateTime.Now - _executionersBusyWarningShownTime) >= _warningsTimeSpan)
{
SystemMonitor.OperationError("All of the [" + _threadPool.MaximumSimultaniouslyRunningThreadsAllowed + "] arbiter [" + _arbiter.Name + "] executioners are busy, entity execution delayed.", TracerItem.PriorityEnum.Medium);
//_executionersBusyWarningShownTime = DateTime.Now;
}
return(null);
}
// Try looking for a new entity.
for (int i = 0; i < _pendingEntities.Count; i++)
{// Look for an entity that we are allowed to execute now.
ExecutionEntity entity = _pendingEntities[i];
IArbiterClient iClient = _arbiter.GetClientByID(entity.ReceiverID);
bool isTransportResponceMessage = (entity.Message is TransportMessage &&
((TransportMessage)(entity.Message)).IsRequest == false);
int runningOnClient = 0;
if (_clientsRunningExecutioners.ContainsKey(entity.ReceiverID))
{
runningOnClient = _clientsRunningExecutioners[entity.ReceiverID];
}
if (isTransportResponceMessage == false && iClient != null &&
iClient.SingleThreadMode && runningOnClient > 0 /*_executionersAndClientIDs.ContainsValue(entity.ReceiverID)*/)
{// We are not allowed to run this, as there is already an executioner there.
// And it is not a responce requestMessage.
continue;
}
if (runningOnClient >= _maxExecutionersPerEntity)
{// This entity is already consuming too many threads. It must release some before using more.
//if ((DateTime.Now - _executionersBusyWarningShownTime) >= _warningsTimeSpan)
{
//_executionersBusyWarningShownTime = DateTime.Now;
SystemMonitor.OperationError("An entity [" + entity.ReceiverID.Id.Name + "] is using all its threads allowed. Further entity executions will be delayed.", TracerItem.PriorityEnum.Medium);
}
continue;
}
//TraceHelper.Trace("PopNextExecutionEntity [" + iClient.ToString() + "][" + iClient.SingleThreadMode + "," + _executionersAndClientIDs.ContainsValue(entity.ReceiverID) + "][" + entity.Message.ToString() + "]");
_pendingEntities.Remove(entity);
// OK, this entity is good to go.
return(entity);
}
return(null);
}
}
/// <summary>
/// Constructor.
/// </summary>
public ArbiterSlimActiveClientStub(IArbiterClient client, ArbiterSlimExecutionStrategy executionStrategy)
{
_client = client;
_executionStrategy = executionStrategy;
SystemMonitor.CheckThrow(executionStrategy != null, "Execution strategy not assigned.");
Construct();
}
/// <summary>
/// Constructor.
/// </summary>
public ArbiterSlimActiveClientStub(IArbiterClient client)
{
_client = client;
//_executionStrategy = new FrameworkThreadPoolExecutionStrategy(this);
_executionStrategy = new ThreadPoolFastExecutionStrategy(this, true);
Construct();
}
/// <summary>
/// Default constructor.
/// </summary>
public ArbiterClientId(string name, Type identifiedType, IArbiterClient optionalReference)
{
_optionalReference = optionalReference;
_sessionTag = string.Empty;
_id = new ComponentId()
{
Guid = Guid.NewGuid(), Name = name, IdentifiedComponentType = identifiedType
};
}
/// <summary>
///
/// </summary>
/// <param name="parameter0"></param>
protected void _timeOutMonitor_EntityTimedOutEvent(TimeOutable parameter0)
{
Conversation conversation = (Conversation)parameter0;
IArbiterClient client = GetClientByID(conversation.OwnerID, false);
if (client != null)
{
client.ReceiveConversationTimedOut(conversation);
}
}
/// <summary>
///
/// </summary>
/// <param name="client"></param>
/// <returns></returns>
public bool RemoveClient(IArbiterClient client)
{
if (_isDisposed)
{// Possible to get disposed while operating here.
return(false);
}
lock (_clientsAndFilters)
{
client.ArbiterUnInitialize();
return(_clientsAndFilters.Remove(client) && _clientsIdsAndClients.Remove(client.SubscriptionClientID));
}
}
/// <summary>
/// Add a client to the arbiter, will raise the ClientAddedEvent if successful.
/// </summary>
public bool AddClient(IArbiterClient client)
{
if (client == null || GetClientByID(client.SubscriptionClientID, false) != null)
{
return(false);
}
if (_isDisposed)
{// Possible to get disposed while operating here.
return(false);
}
lock (_clientsAndFilters)
{
if (_clientsAndFilters.ContainsKey(client))
{
return(false);
}
_clientsAndFilters.Add(client, client.SubscriptionMessageFilter);
}
lock (_clientsIdsAndClients)
{
_clientsIdsAndClients.Add(client.SubscriptionClientID, client);
}
if (client.ArbiterInitialize(this) == false || _isDisposed)
{
lock (_clientsAndFilters)
{
_clientsAndFilters.Remove(client);
}
lock (_clientsIdsAndClients)
{
_clientsIdsAndClients.Remove(client.SubscriptionClientID);
}
SystemMonitor.OperationError("Client failed arbiter initialialization [" + client.Name + "]");
return(false);
}
ClientManagerClientUpdateDelegate clientAddedDelegate = ClientAddedEvent;
if (clientAddedDelegate != null)
{
clientAddedDelegate(this, client);
}
return(true);
}
/// <summary>
/// The direct call allows to circumvent the many steps (incl serialization) of typical message sending
/// and make a direct call to another Arbiter member; thus making a much faster delivery. This path
/// has a maximum optimization for speed, so tracing etc. are disabled.
///
/// Also this mechanism only works for TransportClients currently.
///
/// The mechanism does not utilize any new threads, and the execution is performed on the calling thread.
///
/// Direct calls can only be made to participants on the same arbiter, and no addressing is applied
/// for the messages.
/// </summary>
public Message DirectCall(ArbiterClientId senderID, ArbiterClientId receiverID, Message message)
{
IArbiterClient receiver = GetClientByID(receiverID, true);
if (receiver == null || receiver is TransportClient == false)
{
SystemMonitor.OperationWarning("Sender [" + senderID.Id.Print() + "] creating conversation message [" + message.GetType().Name + " ] by not present receiver [" + receiverID.Id.Print() + "] or receiver not a TransportClient");
return(null);
}
Message response = receiver.ReceiveDirectCall(message);
return(response);
}
/// <summary>
/// Add a client to the arbiter, will raise the ClientAddedEvent if successful.
/// </summary>
public bool AddClient(IArbiterClient client)
{
if (client == null || GetClientByID(client.SubscriptionClientID, false) != null)
{
return false;
}
if (_isDisposed)
{// Possible to get disposed while operating here.
return false;
}
lock (_clientsAndFilters)
{
if (_clientsAndFilters.ContainsKey(client))
{
return false;
}
_clientsAndFilters.Add(client, client.SubscriptionMessageFilter);
}
lock (_clientsIdsAndClients)
{
_clientsIdsAndClients.Add(client.SubscriptionClientID, client);
}
if (client.ArbiterInitialize(this) == false || _isDisposed)
{
lock (_clientsAndFilters)
{
_clientsAndFilters.Remove(client);
}
lock (_clientsIdsAndClients)
{
_clientsIdsAndClients.Remove(client.SubscriptionClientID);
}
SystemMonitor.OperationError("Client failed arbiter initialialization [" + client.Name + "]");
return false;
}
ClientManagerClientUpdateDelegate clientAddedDelegate = ClientAddedEvent;
if (clientAddedDelegate != null)
{
clientAddedDelegate(this, client);
}
return true;
}
/// <summary>
/// Remove the client from the arbiter (will raise the ClientRemovedEvent if successful).
/// </summary>
public bool RemoveClient(IArbiterClient client)
{
if (_isDisposed)
{// Possible to get disposed while operating here.
return(false);
}
bool result = false;
lock (_clientsAndFilters)
{
client.ArbiterUnInitialize();
result = _clientsAndFilters.Remove(client) && _clientsIdsAndClients.Remove(client.SubscriptionClientID);
}
ClientManagerClientUpdateDelegate clientRemovedDelegate = ClientRemovedEvent;
if (result && clientRemovedDelegate != null)
{
clientRemovedDelegate(this, client);
}
return(result);
}
void arbiter_ClientRemovedEvent(IArbiterClientManager manager, IArbiterClient client)
{
RemoveClient(client.Slim);
}
void arbiter_ClientAddedEvent(IArbiterClientManager manager, IArbiterClient client)
{
AddClient(client.Slim);
}
/// <summary>
///
/// </summary>
void worker_DoWork(ExecutionEntity entity)
{
lock (this)
{
if (_clientsRunningExecutioners.ContainsKey(entity.ReceiverID) == false)
{
_clientsRunningExecutioners[entity.ReceiverID] = 1;
}
else
{
_clientsRunningExecutioners[entity.ReceiverID] = _clientsRunningExecutioners[entity.ReceiverID] + 1;
}
}
TracerHelper.Trace(" Enlisted entity at [" + entity.ReceiverID.Id.Name + "]");
DateTime startTime = DateTime.Now;
TracerHelper.TraceEntry("entity starting [" + entity.Message.GetType().Name + ", " +
entity.ReceiverID.Id.Name + "], total count [" + _threadPool.ActiveRunningThreadsCount.ToString() + "]");
// Notify executor we are running this entity.
entity.Conversation.EntityExecutionStarted(entity);
try
{
IArbiterClient receiver = _arbiter.GetClientByID(entity.ReceiverID);
if (receiver != null)
{
SystemMonitor.CheckError(((TransportMessage)entity.Message).TransportInfo.TransportInfoCount > 0);
// Do the entity.
if (entity is ExecutionEntityWithReply)
{
ExecutionEntityWithReply replyEntity = (ExecutionEntityWithReply)entity;
SystemMonitor.CheckError(replyEntity.ReplyMessage == null && replyEntity.ReplyTimeOut == TimeSpan.Zero);
receiver.ReceiveExecutionWithReply(replyEntity);
}
else
{
SystemMonitor.CheckError(entity.GetType() == typeof(ExecutionEntity));
receiver.ReceiveExecution(entity);
}
entity.Conversation.EntityExecutionFinished(entity);
}
}
catch (TargetInvocationException exception)
{
if (exception.InnerException is ThreadInterruptedException)
{// ThreadInterruptedException's are OK, since we use them to awake sleeping threads when closing down.
SystemMonitor.Report(exception.ToString() + "[" + exception.InnerException.Message + "]");
entity.Conversation.EntityExecutionFailed(entity, exception);
}
else
{
SystemMonitor.OperationError(exception.ToString() + "[" + exception.InnerException.Message + "]");
entity.Conversation.EntityExecutionFailed(entity, exception);
}
}
catch (ThreadInterruptedException exception)
{
// ThreadInterruptedException's are OK, since we use them to awake sleeping threads when closing down.
SystemMonitor.Report(exception.ToString() + "[" + exception.Message + "]");
entity.Conversation.EntityExecutionFailed(entity, exception);
}
catch (Exception exception)
{
SystemMonitor.Error(exception.ToString());
entity.Conversation.EntityExecutionFailed(entity, exception);
}
finally
{
entity.Die();
}
lock (this)
{
if (_clientsRunningExecutioners.ContainsKey(entity.ReceiverID))
{
int newClientsValue = _clientsRunningExecutioners[entity.ReceiverID] - 1;
if (newClientsValue <= 0)
{
_clientsRunningExecutioners.Remove(entity.ReceiverID);
}
else
{
_clientsRunningExecutioners[entity.ReceiverID] = newClientsValue;
}
}
else
{
if (IsDisposed == false)
{
SystemMonitor.Error("ClientsRunningExecutioners not properly maintained.");
}
}
TracerHelper.TraceExit("entity finished for [" + (DateTime.Now - startTime).Milliseconds + "]ms [" + entity.Message.GetType().Name + ", " + entity.ReceiverID.Id.Name + "], total count [" + _threadPool.ActiveRunningThreadsCount.ToString() + "]");
}
// Continue execution chain.
UpdatePendingExecution();
}
/// <summary>
/// Remove the client from the arbiter (will raise the ClientRemovedEvent if successful).
/// </summary>
public bool RemoveClient(IArbiterClient client)
{
if (_isDisposed)
{// Possible to get disposed while operating here.
return false;
}
bool result = false;
lock (_clientsAndFilters)
{
client.ArbiterUnInitialize();
result = _clientsAndFilters.Remove(client) && _clientsIdsAndClients.Remove(client.SubscriptionClientID);
}
ClientManagerClientUpdateDelegate clientRemovedDelegate = ClientRemovedEvent;
if (result && clientRemovedDelegate != null)
{
clientRemovedDelegate(this, client);
}
return result;
}
/// <summary>
///
/// </summary>
/// <param name="client"></param>
/// <returns></returns>
public bool RemoveClient(IArbiterClient client)
{
if (_isDisposed)
{// Possible to get disposed while operating here.
return false;
}
lock (_clientsAndFilters)
{
client.ArbiterUnInitialize();
return _clientsAndFilters.Remove(client) && _clientsIdsAndClients.Remove(client.SubscriptionClientID);
}
}
