public override bool OnStart()
{
try
{
// Register the dependency resolver for initializing handlers and service
// classes.
var resolver = CarWorkerHostDependencyResolver.CreateAsync().Result;
DependencyResolverFactory.Register(
resolver
);
// Set up the process defaults for connections to optimize storage performance
ServicePointManager.DefaultConnectionLimit = int.MaxValue;
var configuration = DispatcherConfiguration.GetCurrentConfiguration();
var typesToSearchForHandlers = typeof(UpdateLocationHandler)
.Assembly
.DefinedTypes;
_coordinator = ProcessingCoordinator.CreateAsync(
RoleEnvironment.CurrentRoleInstance.Id,
configuration.EventHubName,
configuration.ConsumerGroupName,
configuration.EventHubConnectionString,
configuration.CheckpointStorageAccount,
configuration.MaxBatchSize,
configuration.PrefetchCount,
configuration.ReceiveTimeout,
configuration.MaxConcurrencyPerProcessor,
typesToSearchForHandlers,
(name, partitionId) =>
new CircuitBreaker(
name,
partitionId,
configuration.CircuitBreakerWarningLevel,
configuration.CircuitBreakerTripLevel,
configuration.CircuitBreakerStallInterval,
configuration.CircuitBreakerLogCooldownInterval),
new DispatcherInstrumentationManager(instrumentationEnabled: true).CreatePublisher("WaWorkerHost")).Result;
bool result = base.OnStart();
return(result);
}
catch (Exception ex)
{
// Hard error on startup, usually configuration or security related
// Ensure that we log this error, including a direct post to the local
// event log
LogHelpers.HandleRoleException(Logger, "OnStart()", ex);
throw;
}
}
private static async Task RunAsync(CancellationToken token)
{
var configuration = DispatcherConfiguration.GetCurrentConfiguration();
// Configure dependency resolver (including poison handler)
var resolver = await ConsoleHostDependencyResolver.CreateAsync();
DependencyResolverFactory.Register(
resolver
);
Console.WriteLine("Initializing coordinator");
var messageProcessor = await ProcessingCoordinator.CreateAsync(
"Console",
configuration.EventHubName,
configuration.ConsumerGroupName,
configuration.EventHubConnectionString,
configuration.CheckpointStorageAccount,
configuration.MaxBatchSize,
configuration.PrefetchCount,
configuration.ReceiveTimeout,
configuration.MaxConcurrencyPerProcessor,
typeof(UpdateLocationHandler).Assembly.DefinedTypes,
(name, partitionId) =>
new CircuitBreaker(
name,
partitionId,
configuration.CircuitBreakerWarningLevel,
configuration.CircuitBreakerTripLevel,
configuration.CircuitBreakerStallInterval,
configuration.CircuitBreakerLogCooldownInterval),
new DispatcherInstrumentationManager(true, true).CreatePublisher("console"));
Console.WriteLine("Running processor");
try
{
await Task.Delay(Timeout.InfiniteTimeSpan, token);
}
catch (TaskCanceledException) { /* expected cancellation */ }
messageProcessor.Dispose();
}
