public async Task <string> GetHostIdAsync(CancellationToken cancellationToken)
{
CloudStorageAccount account;
try
{
account = _storageAccountProvider.GetStorageAccount();
}
catch (InvalidOperationException exception)
{
throw new InvalidOperationException(
"A host ID is required. Either set JobHostConfiguration.HostId or provide a valid storage " +
"connection string.", exception);
}
IFunctionIndex index = await _getFunctionIndexProvider.GetAsync(cancellationToken);
IEnumerable <MethodInfo> indexedMethods = index.ReadAllMethods();
string sharedHostName = GetSharedHostName(indexedMethods, account);
var directory = account.CreateCloudBlobClient().GetContainerReference(
HostContainerNames.Hosts).GetDirectoryReference(HostDirectoryNames.Ids);
return(await GetOrCreateHostIdAsync(sharedHostName, directory, cancellationToken));
}
public FunctionMetadata GetFunctionMetadata(string functionName)
{
FunctionMetadata result = null;
var index = _functionIndexProvider.GetAsync(CancellationToken.None).GetAwaiter().GetResult();
var functionDefinition = index.LookupByName(functionName);
if (functionDefinition != null)
{
result = new FunctionMetadata()
{
IsDisabled = functionDefinition.Descriptor.IsDisabled
};
}
return result;
}
internal static async Task <JobHostContext> CreateAndLogHostStartedAsync(
IStorageAccountProvider storageAccountProvider,
IFunctionIndexProvider functionIndexProvider,
IBindingProvider bindingProvider,
IHostIdProvider hostIdProvider,
IHostInstanceLoggerProvider hostInstanceLoggerProvider,
IFunctionInstanceLoggerProvider functionInstanceLoggerProvider,
IFunctionOutputLoggerProvider functionOutputLoggerProvider,
IQueueConfiguration queueConfiguration,
IBackgroundExceptionDispatcher backgroundExceptionDispatcher,
IConsoleProvider consoleProvider,
CancellationToken shutdownToken,
CancellationToken cancellationToken)
{
using (CancellationTokenSource combinedCancellationSource =
CancellationTokenSource.CreateLinkedTokenSource(cancellationToken, shutdownToken))
{
CancellationToken combinedCancellationToken = combinedCancellationSource.Token;
await WriteSiteExtensionManifestAsync(combinedCancellationToken);
IStorageAccount dashboardAccount = await storageAccountProvider.GetDashboardAccountAsync(
combinedCancellationToken);
IHostInstanceLogger hostInstanceLogger = await hostInstanceLoggerProvider.GetAsync(
combinedCancellationToken);
IFunctionInstanceLogger functionInstanceLogger = await functionInstanceLoggerProvider.GetAsync(
combinedCancellationToken);
IFunctionOutputLogger functionOutputLogger = await functionOutputLoggerProvider.GetAsync(
combinedCancellationToken);
IFunctionIndex functions = await functionIndexProvider.GetAsync(combinedCancellationToken);
IListenerFactory functionsListenerFactory = new HostListenerFactory(functions.ReadAll());
FunctionExecutor executor = new FunctionExecutor(functionInstanceLogger, functionOutputLogger,
backgroundExceptionDispatcher);
TextWriter consoleOut = consoleProvider.Out;
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, consoleOut, functions,
functionInstanceLogger);
Guid hostInstanceId = Guid.NewGuid();
string instanceQueueName = HostQueueNames.GetHostQueueName(hostInstanceId.ToString("N"));
IStorageQueue instanceQueue = dashboardQueueClient.GetQueueReference(instanceQueueName);
IListenerFactory instanceQueueListenerFactory = new HostMessageListenerFactory(instanceQueue,
queueConfiguration, backgroundExceptionDispatcher, consoleOut, functions,
functionInstanceLogger);
HeartbeatDescriptor heartbeatDescriptor = new HeartbeatDescriptor
{
SharedContainerName = HostContainerNames.Hosts,
SharedDirectoryName = HostDirectoryNames.Heartbeats + "/" + hostId,
InstanceBlobName = hostInstanceId.ToString("N"),
ExpirationInSeconds = (int)HeartbeatIntervals.ExpirationInterval.TotalSeconds
};
IRecurrentCommand heartbeatCommand = new UpdateHostHeartbeatCommand(new HeartbeatCommand(
dashboardAccount,
heartbeatDescriptor.SharedContainerName,
heartbeatDescriptor.SharedDirectoryName + "/" + heartbeatDescriptor.InstanceBlobName));
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, executor);
IListenerFactory hostListenerFactory = new CompositeListenerFactory(functionsListenerFactory,
sharedQueueListenerFactory, instanceQueueListenerFactory);
listener = CreateHostListener(hostListenerFactory, heartbeatCommand, backgroundExceptionDispatcher,
shutdownToken, executor);
// 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, executor);
IListener factoryListener = new ListenerFactoryListener(functionsListenerFactory, executor);
IListener shutdownListener = new ShutdownListener(shutdownToken, factoryListener);
listener = shutdownListener;
hostOutputMessage = new DataOnlyHostOutputMessage();
}
executor.HostOutputMessage = hostOutputMessage;
IEnumerable <FunctionDescriptor> descriptors = functions.ReadAllDescriptors();
int descriptorsCount = descriptors.Count();
if (descriptorsCount == 0)
{
consoleOut.WriteLine(
"No functions found. Try making job classes and methods public.");
}
else
{
consoleOut.WriteLine("Found the following functions:");
foreach (FunctionDescriptor descriptor in descriptors)
{
consoleOut.WriteLine(descriptor.FullName);
}
}
return(new JobHostContext(functions, hostCallExecutor, listener, consoleOut));
}
}