public void GetMonitor_ReturnsSharedMonitor()
{
var queueListener = new QueueListener();
var watcherMock = new Mock <IBlobWrittenWatcher>(MockBehavior.Strict);
var executor = new BlobQueueTriggerExecutor(watcherMock.Object, NullLogger <BlobListener> .Instance);
var sharedBlobQueueListener = new SharedBlobQueueListener(queueListener, executor);
var sharedListenerMock = new Mock <ISharedListener>(MockBehavior.Strict);
var blobListener1 = new BlobListener(sharedBlobQueueListener);
var blobListener2 = new BlobListener(sharedBlobQueueListener);
var monitor1 = blobListener1.GetMonitor();
var monitor2 = blobListener1.GetMonitor();
Assert.AreSame(monitor1, monitor2);
Assert.AreSame(monitor1, queueListener);
}
public async Task <IListener> CreateAsync(CancellationToken cancellationToken)
{
// Note that these clients are intentionally for the storage account rather than for the dashboard account.
// We use the storage, not dashboard, account for the blob receipt container and blob trigger queues.
var primaryBlobClient = _hostBlobServiceClient;
// Important: We're using the storage account of the function target here, which is the account that the
// function the listener is for is targeting. This is the account that will be used
// to read the trigger blob.
var targetBlobClient = _dataBlobServiceClient;
var targetQueueClient = _dataQueueServiceClient;
BlobTriggerQueueWriter blobTriggerQueueWriter = await _blobTriggerQueueWriterFactory.CreateAsync(cancellationToken).ConfigureAwait(false);
string hostId = await _hostIdProvider.GetHostIdAsync(cancellationToken).ConfigureAwait(false);
SharedBlobListener sharedBlobListener = null;
// we do not need to create SharedBlobListener for EventGrid blob trigger
if (_blobTriggerSource == BlobTriggerSource.LogsAndContainerScan)
{
sharedBlobListener = _sharedContextProvider.GetOrCreateInstance <SharedBlobListener>(
new SharedBlobListenerFactory(hostId, _hostBlobServiceClient, _exceptionHandler, _blobWrittenWatcherSetter, _loggerFactory.CreateLogger <BlobListener>()));
// Register the blob container we wish to monitor with the shared blob listener.
await RegisterWithSharedBlobListenerAsync(hostId, sharedBlobListener, primaryBlobClient,
blobTriggerQueueWriter, cancellationToken).ConfigureAwait(false);
}
// Create a "bridge" listener that will monitor the blob
// notification queue and dispatch to the target job function.
SharedBlobQueueListener sharedBlobQueueListener = _sharedContextProvider.GetOrCreateInstance <SharedBlobQueueListener>(
new SharedBlobQueueListenerFactory(_hostQueueServiceClient, blobTriggerQueueWriter.SharedQueueWatcher, blobTriggerQueueWriter.QueueClient,
_blobsOptions, _exceptionHandler, _loggerFactory, sharedBlobListener?.BlobWritterWatcher, _functionDescriptor, _blobTriggerSource, _concurrencyManager));
var queueListener = new BlobListener(sharedBlobQueueListener);
// the client to use for the poison queue
// by default this should target the same storage account
// as the blob container we're monitoring
var poisonQueueClient = targetQueueClient;
// Register our function with the shared blob queue listener
RegisterWithSharedBlobQueueListenerAsync(sharedBlobQueueListener, targetBlobClient, poisonQueueClient);
// Check a flag in the shared context to see if we've created the singleton
// shared blob listener in this host instance.
// We do not need SharedBlobListener for EventGrid blob trigger.
object singletonListenerCreated = false;
if (_blobTriggerSource == BlobTriggerSource.LogsAndContainerScan &&
!_sharedContextProvider.TryGetValue(SingletonBlobListenerScopeId, out singletonListenerCreated))
{
// Create a singleton shared blob listener, since we only
// want a single instance of the blob poll/scan logic to be running
// across host instances
var singletonBlobListener = _singletonManager.CreateHostSingletonListener(
new BlobListener(sharedBlobListener), SingletonBlobListenerScopeId);
_sharedContextProvider.SetValue(SingletonBlobListenerScopeId, true);
return(new CompositeListener(singletonBlobListener, queueListener));
}
else
{
// We've already created the singleton blob listener
// so just return our queue listener. Note that while we want the
// blob scan to be singleton, the shared queue listener needs to run
// on ALL instances so load can be scaled out
return(queueListener);
}
}