public ProcessorOperationHandlerBase CreateHandler(
ProcessorManagementService Svc,
ProcessorOperation Operation)
{
switch (Operation.OperationType)
{
case ProcessorOperationType.Add:
return(new ProcessorOperationAddHandler(Svc, Operation));
case ProcessorOperationType.Delete:
return(new ProcessorOperationDeleteHandler(Svc, Operation));
case ProcessorOperationType.Pause:
return(new ProcessorOperationStatusChangeHandler(Svc, Operation));
case ProcessorOperationType.Resume:
return(new ProcessorOperationStatusChangeHandler(Svc, Operation));
case ProcessorOperationType.Stop:
return(new ProcessorOperationStatusChangeHandler(Svc, Operation));
case ProcessorOperationType.DrainStop:
return(new ProcessorOperationStatusChangeHandler(Svc, Operation));
case ProcessorOperationType.RuntimeStatusCheck:
return(new ProcessorOperationStatusChangeHandler(Svc, Operation));
case ProcessorOperationType.Update:
return(new ProcessorOperationUpdateHandler(Svc, Operation));
default:
throw new InvalidOperationException("Can not identify Processor Operation");
}
}
public ProcessorOperationHandlerBase CreateHandler(
ProcessorManagementService Svc,
ProcessorOperation Operation)
{
switch (Operation.OperationType)
{
case ProcessorOperationType.Add:
return new ProcessorOperationAddHandler(Svc, Operation);
case ProcessorOperationType.Delete:
return new ProcessorOperationDeleteHandler(Svc, Operation);
case ProcessorOperationType.Pause:
return new ProcessorOperationStatusChangeHandler(Svc, Operation);
case ProcessorOperationType.Resume:
return new ProcessorOperationStatusChangeHandler(Svc, Operation);
case ProcessorOperationType.Stop:
return new ProcessorOperationStatusChangeHandler(Svc, Operation);
case ProcessorOperationType.DrainStop:
return new ProcessorOperationStatusChangeHandler(Svc, Operation);
case ProcessorOperationType.RuntimeStatusCheck:
return new ProcessorOperationStatusChangeHandler(Svc, Operation);
case ProcessorOperationType.Update:
return new ProcessorOperationUpdateHandler(Svc, Operation);
default:
throw new InvalidOperationException("Can not identify Processor Operation");
}
}
public ProcessorOperationAddHandler(
ProcessorManagementService svc,
ProcessorOperation Opeartion) : base(svc, Opeartion)
{
}
public ProcessorOperationStatusChangeHandler(
ProcessorManagementService svc,
ProcessorOperation Operation) : base(svc, Operation)
{
}
public ProcessorOperationUpdateHandler(
ProcessorManagementService svc,
ProcessorOperation Operation) : base(svc, Operation)
{
}
public ProcessorOperationHandlerBase(ProcessorManagementService svc, ProcessorOperation Operation)
{
this.Svc = svc;
this.processorOperation = Operation;
}
protected override async Task RunAsync(CancellationToken cancellationToken)
{
this.SetProcessorAppInstanceDefaults();
// subscribe to configuration changes
this.Context.CodePackageActivationContext.ConfigurationPackageModifiedEvent +=
this.CodePackageActivationContext_ConfigurationPackageModifiedEvent;
this.ProcessorStateStore = await this.StateManager.GetOrAddAsync <IReliableDictionary <string, Processor> >(ProcessorDefinitionStateDictionaryName);
this.ProcessorOperationsQueue = await this.StateManager.GetOrAddAsync <IReliableQueue <ProcessorOperation> >(OperationQueueName);
this.ProcessorOperationFactory = new ProcessorOperationHandlerFactory();
ProcessorOperation processorOperation = null;
// pump and execute ProcessorPperation from the queue
while (!cancellationToken.IsCancellationRequested)
{
using (ITransaction tx = this.StateManager.CreateTransaction())
{
try
{
ConditionalValue <ProcessorOperation> result = await this.ProcessorOperationsQueue.TryDequeueAsync(
tx,
TimeSpan.FromMilliseconds(1000),
cancellationToken);
if (result.HasValue)
{
processorOperation = result.Value;
ProcessorOperationHandlerBase handler = this.ProcessorOperationFactory.CreateHandler(this, processorOperation);
await handler.RunOperation(tx);
await tx.CommitAsync();
}
else
{
await Task.Delay(TimeSpan.FromSeconds(1), cancellationToken);
}
}
catch (TimeoutException toe)
{
ServiceEventSource.Current.Message(
string.Format("Controller service encountered timeout in a work operations de-queue process {0} and will try again", toe.StackTrace));
}
catch (AggregateException aex)
{
AggregateException ae = aex.Flatten();
string sError = string.Empty;
if (null == processorOperation)
{
sError =
string.Format(
"Event Processor Management Service encountered an error processing Processor-Operation {0} {1} and will terminate replica",
ae.GetCombinedExceptionMessage(),
ae.GetCombinedExceptionStackTrace());
}
else
{
sError =
string.Format(
"Event Processor Management Service encountered an error processing Processor-opeartion {0} against {1} Error {2} stack trace {3} and will terminate replica",
processorOperation.OperationType.ToString(),
processorOperation.ProcessorName,
ae.GetCombinedExceptionMessage(),
ae.GetCombinedExceptionStackTrace());
}
ServiceEventSource.Current.ServiceMessage(this, sError);
throw;
}
}
}
}
