public void ExecuteFromUntil(int begin, int end)
{
Task.Factory.StartNew(() => {
for (int i = begin; i < end; i++)
{
Executor clientExecutor = ExecutorFactory.Factory(this.Logger[i], i + 1);
// Add request to queue
Log.Debug($"Trying to add request #{opNumber} in the Execution Queue");
OrderedQueue.AddRequestToQueue(this, this.Logger[i], clientExecutor);
}
});
}
private ProcessRequest RunProcessRequestProtocol(ClientRequest clientRequest)
{
if (this.replicaState.ClientTable.TryGetValue(clientRequest.ClientId, out Tuple <int, ClientResponse> clientResponse))
{
// Key is in the dictionary
if (clientResponse == null || clientResponse.Item1 < 0 ||
clientRequest.RequestNumber < clientResponse.Item1)
{
// Duplicate Request: Long forgotten => drop
return(ProcessRequest.DROP);
}
if (clientRequest.RequestNumber == clientResponse.Item1)
{
// Duplicate Request
// If it is in execution.. wait.
if (clientResponse.Item2.GetType() == typeof(Executor))
{
Executor executor = (Executor)clientResponse.Item2;
executor.Executed.WaitOne();
}
return(ProcessRequest.LAST_EXECUTION);
}
// Execute the requests in client's casual order
if (clientRequest.RequestNumber != clientResponse.Item1 + 1)
{
if (!this.replicaState.HandlersClient.ContainsKey(clientRequest.ClientId))
{
this.replicaState.HandlersClient.TryAdd(
clientRequest.ClientId,
new EventWaitHandle(false, EventResetMode.ManualReset));
}
this.replicaState.HandlersClient.TryGetValue(
clientRequest.ClientId,
out EventWaitHandle myHandler);
while (clientRequest.RequestNumber != clientResponse.Item1 + 1)
{
if (clientRequest.RequestNumber > clientResponse.Item1 + 1)
{
return(ProcessRequest.DROP);
}
myHandler.WaitOne();
}
}
}
else
{
// Not in dictionary... Add with value as null
this.replicaState.ClientTable.Add(clientRequest.ClientId, new Tuple <int, ClientResponse>(-1, null));
}
// Send Prepare Message and waits for f replies. opNumber is the order we agreed upon.
int opNumber = this.SendPrepareMessage(clientRequest);
Executor clientExecutor = ExecutorFactory.Factory(clientRequest, opNumber);
// Add request to queue
OrderedQueue.AddRequestToQueue(this.replicaState, clientRequest, clientExecutor);
// Wait execution
clientExecutor.Executed.WaitOne();
return(ProcessRequest.LAST_EXECUTION);
}