public static async Task<JobHostContext> CreateAndLogHostStartedAsync(
JobHost host,
IStorageAccountProvider storageAccountProvider,
IQueueConfiguration queueConfiguration,
ITypeLocator typeLocator,
IJobActivator activator,
INameResolver nameResolver,
IConsoleProvider consoleProvider,
JobHostConfiguration config,
CancellationToken shutdownToken,
CancellationToken cancellationToken,
IHostIdProvider hostIdProvider = null,
FunctionExecutor functionExecutor = null,
IFunctionIndexProvider functionIndexProvider = null,
IBindingProvider bindingProvider = null,
IHostInstanceLoggerProvider hostInstanceLogerProvider = null,
IFunctionInstanceLoggerProvider functionInstanceLoggerProvider = null,
IFunctionOutputLoggerProvider functionOutputLoggerProvider = null,
IBackgroundExceptionDispatcher backgroundExceptionDispatcher = null,
SingletonManager singletonManager = null)
{
if (hostIdProvider == null)
{
hostIdProvider = new DynamicHostIdProvider(storageAccountProvider, () => functionIndexProvider);
}
IExtensionTypeLocator extensionTypeLocator = new ExtensionTypeLocator(typeLocator);
if (backgroundExceptionDispatcher == null)
{
backgroundExceptionDispatcher = BackgroundExceptionDispatcher.Instance;
}
ContextAccessor<IMessageEnqueuedWatcher> messageEnqueuedWatcherAccessor = new ContextAccessor<IMessageEnqueuedWatcher>();
ContextAccessor<IBlobWrittenWatcher> blobWrittenWatcherAccessor = new ContextAccessor<IBlobWrittenWatcher>();
ISharedContextProvider sharedContextProvider = new SharedContextProvider();
// Create a wrapper TraceWriter that delegates to both the user
// TraceWriter specified on Config (if present), as well as to Console
TraceWriter trace = new ConsoleTraceWriter(config.Tracing, consoleProvider.Out);
// Register system services with the service container
config.AddService<INameResolver>(nameResolver);
ExtensionConfigContext context = new ExtensionConfigContext
{
Config = config,
Trace = trace,
Host = host
};
InvokeExtensionConfigProviders(context);
IExtensionRegistry extensions = config.GetExtensions();
ITriggerBindingProvider triggerBindingProvider = DefaultTriggerBindingProvider.Create(nameResolver,
storageAccountProvider, extensionTypeLocator, hostIdProvider, queueConfiguration, backgroundExceptionDispatcher,
messageEnqueuedWatcherAccessor, blobWrittenWatcherAccessor, sharedContextProvider, extensions, trace);
if (bindingProvider == null)
{
bindingProvider = DefaultBindingProvider.Create(nameResolver, storageAccountProvider, extensionTypeLocator, messageEnqueuedWatcherAccessor, blobWrittenWatcherAccessor, extensions);
}
DefaultLoggerProvider loggerProvider = new DefaultLoggerProvider(storageAccountProvider, trace);
if (singletonManager == null)
{
singletonManager = new SingletonManager(storageAccountProvider, backgroundExceptionDispatcher, config.Singleton, trace, config.NameResolver);
}
using (CancellationTokenSource combinedCancellationSource = CancellationTokenSource.CreateLinkedTokenSource(cancellationToken, shutdownToken))
{
CancellationToken combinedCancellationToken = combinedCancellationSource.Token;
await WriteSiteExtensionManifestAsync(combinedCancellationToken);
IStorageAccount dashboardAccount = await storageAccountProvider.GetDashboardAccountAsync(combinedCancellationToken);
IHostInstanceLogger hostInstanceLogger = null;
if (hostInstanceLogerProvider != null)
{
hostInstanceLogger = await hostInstanceLogerProvider.GetAsync(combinedCancellationToken);
}
else
{
hostInstanceLogger = await((IHostInstanceLoggerProvider)loggerProvider).GetAsync(combinedCancellationToken);
}
IFunctionInstanceLogger functionInstanceLogger = null;
if (functionInstanceLoggerProvider != null)
{
functionInstanceLogger = await functionInstanceLoggerProvider.GetAsync(combinedCancellationToken);
}
else
{
functionInstanceLogger = (IFunctionInstanceLogger)(await((IFunctionInstanceLoggerProvider)loggerProvider).GetAsync(combinedCancellationToken));
}
IFunctionOutputLogger functionOutputLogger = null;
if (functionOutputLoggerProvider != null)
{
functionOutputLogger = await functionOutputLoggerProvider.GetAsync(combinedCancellationToken);
}
else
{
functionOutputLogger = (IFunctionOutputLogger)(await((IFunctionOutputLoggerProvider)loggerProvider).GetAsync(combinedCancellationToken));
}
if (functionExecutor == null)
{
functionExecutor = new FunctionExecutor(functionInstanceLogger, functionOutputLogger, backgroundExceptionDispatcher, trace);
}
if (functionIndexProvider == null)
{
functionIndexProvider = new FunctionIndexProvider(typeLocator, triggerBindingProvider, bindingProvider, activator, functionExecutor, extensions, singletonManager);
}
IFunctionIndex functions = await functionIndexProvider.GetAsync(combinedCancellationToken);
IListenerFactory functionsListenerFactory = new HostListenerFactory(functions.ReadAll(), singletonManager, activator, nameResolver, trace);
IFunctionExecutor hostCallExecutor;
IListener listener;
HostOutputMessage hostOutputMessage;
if (dashboardAccount != null)
{
string hostId = await hostIdProvider.GetHostIdAsync(cancellationToken);
string sharedQueueName = HostQueueNames.GetHostQueueName(hostId);
IStorageQueueClient dashboardQueueClient = dashboardAccount.CreateQueueClient();
IStorageQueue sharedQueue = dashboardQueueClient.GetQueueReference(sharedQueueName);
IListenerFactory sharedQueueListenerFactory = new HostMessageListenerFactory(sharedQueue,
queueConfiguration, backgroundExceptionDispatcher, trace, functions,
functionInstanceLogger, functionExecutor);
Guid hostInstanceId = Guid.NewGuid();
string instanceQueueName = HostQueueNames.GetHostQueueName(hostInstanceId.ToString("N"));
IStorageQueue instanceQueue = dashboardQueueClient.GetQueueReference(instanceQueueName);
IListenerFactory instanceQueueListenerFactory = new HostMessageListenerFactory(instanceQueue,
queueConfiguration, backgroundExceptionDispatcher, trace, functions,
functionInstanceLogger, functionExecutor);
HeartbeatDescriptor heartbeatDescriptor = new HeartbeatDescriptor
{
SharedContainerName = HostContainerNames.Hosts,
SharedDirectoryName = HostDirectoryNames.Heartbeats + "/" + hostId,
InstanceBlobName = hostInstanceId.ToString("N"),
ExpirationInSeconds = (int)HeartbeatIntervals.ExpirationInterval.TotalSeconds
};
IStorageBlockBlob blob = dashboardAccount.CreateBlobClient()
.GetContainerReference(heartbeatDescriptor.SharedContainerName)
.GetBlockBlobReference(heartbeatDescriptor.SharedDirectoryName + "/" + heartbeatDescriptor.InstanceBlobName);
IRecurrentCommand heartbeatCommand = new UpdateHostHeartbeatCommand(new HeartbeatCommand(blob));
IEnumerable<MethodInfo> indexedMethods = functions.ReadAllMethods();
Assembly hostAssembly = GetHostAssembly(indexedMethods);
string displayName = hostAssembly != null ? hostAssembly.GetName().Name : "Unknown";
hostOutputMessage = new DataOnlyHostOutputMessage
{
HostInstanceId = hostInstanceId,
HostDisplayName = displayName,
SharedQueueName = sharedQueueName,
InstanceQueueName = instanceQueueName,
Heartbeat = heartbeatDescriptor,
WebJobRunIdentifier = WebJobRunIdentifier.Current
};
hostCallExecutor = CreateHostCallExecutor(instanceQueueListenerFactory, heartbeatCommand,
backgroundExceptionDispatcher, shutdownToken, functionExecutor);
IListenerFactory hostListenerFactory = new CompositeListenerFactory(functionsListenerFactory,
sharedQueueListenerFactory, instanceQueueListenerFactory);
listener = CreateHostListener(hostListenerFactory, heartbeatCommand, backgroundExceptionDispatcher, shutdownToken);
// Publish this to Azure logging account so that a web dashboard can see it.
await LogHostStartedAsync(functions, hostOutputMessage, hostInstanceLogger, combinedCancellationToken);
}
else
{
hostCallExecutor = new ShutdownFunctionExecutor(shutdownToken, functionExecutor);
IListener factoryListener = new ListenerFactoryListener(functionsListenerFactory);
IListener shutdownListener = new ShutdownListener(shutdownToken, factoryListener);
listener = shutdownListener;
hostOutputMessage = new DataOnlyHostOutputMessage();
}
functionExecutor.HostOutputMessage = hostOutputMessage;
IEnumerable<FunctionDescriptor> descriptors = functions.ReadAllDescriptors();
int descriptorsCount = descriptors.Count();
if (descriptorsCount == 0)
{
trace.Warning("No functions found. Try making job classes and methods public.", TraceSource.Indexing);
}
else
{
StringBuilder functionsTrace = new StringBuilder();
functionsTrace.AppendLine("Found the following functions:");
foreach (FunctionDescriptor descriptor in descriptors)
{
functionsTrace.AppendLine(descriptor.FullName);
}
trace.Info(functionsTrace.ToString(), TraceSource.Indexing);
}
return new JobHostContext(functions, hostCallExecutor, listener, trace);
}
}
private static IListener CreateHostListener(IListenerFactory allFunctionsListenerFactory,
IRecurrentCommand heartbeatCommand, IBackgroundExceptionDispatcher backgroundExceptionDispatcher,
CancellationToken shutdownToken)
{
IListener factoryListener = new ListenerFactoryListener(allFunctionsListenerFactory);
IListener heartbeatListener = new HeartbeatListener(heartbeatCommand, backgroundExceptionDispatcher, factoryListener);
IListener shutdownListener = new ShutdownListener(shutdownToken, heartbeatListener);
return shutdownListener;
}