public void Error_WorkflowNonTaskEntryPoint()
{
// Workflow entry points methods need to return a Task.
Assert.Throws <WorkflowTypeException>(() => StubManager.NewWorkflowStub <IErrorNonTaskEntryPointWorkflow1>(client));
Assert.Throws <WorkflowTypeException>(() => StubManager.NewWorkflowStub <IErrorNonTaskEntryPointWorkflow2>(client));
}
public void Error_WorkflowDuplicateDuplicateEntryPoints()
{
// Verify that we detect duplicate entrypoint methods
// with explicit names.
Assert.Throws <WorkflowTypeException>(() => StubManager.NewWorkflowStub <IDuplicateEntryPointsWorkflow>(client));
}
public void Error_ActivityDuplicateDuplicateDefaultEntryPoints()
{
// Verify that we detect duplicate entrypoint methods
// with the default name.
Assert.Throws <ActivityTypeException>(() => StubManager.CreateActivityStub <IDuplicateDefaultEntryPointsActivity>(client, new DummyWorkflow(), "my-activity"));
}
public void Error_ActivityDuplicateDuplicateEntryPoints()
{
// Verify that we detect duplicate entrypoint methods
// with explicit names.
Assert.Throws <ActivityTypeException>(() => StubManager.NewActivityStub <IDuplicateEntryPointsActivity>(client, new DummyWorkflow().Workflow));
}
public StubManagerTests()
{
var stubManagerOptions = new StubManagerOptions {
AutoGenerateUnknown = true, AutoResolveByNaming = true
};
_stubManager = new StubManager(stubManagerOptions);
}
/// <summary>
/// Creates a typed workflow stub that can be used to start as well as
/// query and signal the workflow via the type-safe interface methods.
/// </summary>
/// <typeparam name="TWorkflowInterface">Identifies the workflow interface.</typeparam>
/// <param name="options">Optionally specifies the workflow options.</param>
/// <param name="workflowTypeName">
/// Optionally specifies the workflow type name by overriding the fully
/// qualified <typeparamref name="TWorkflowInterface"/> type name or the name
/// specified by a <see cref="WorkflowAttribute"/>.
/// </param>
/// <returns>The dynamically generated stub that implements the workflow methods defined by <typeparamref name="TWorkflowInterface"/>.</returns>
/// <remarks>
/// <para>
/// Unlike activity stubs, a workflow stub may only be used to launch a single
/// workflow. You'll need to create a new stub for each workflow you wish to
/// invoke and then the first method called on a workflow stub must be
/// the one of the methods tagged by <see cref="WorkflowMethodAttribute"/>.
/// </para>
/// <note>
/// <para>
/// .NET and Java workflows can implement multiple workflow method using attributes
/// and annotations to assign unique names to each. Each workflow method is actually
/// registered with Cadence as a distinct workflow type. Workflow methods with a blank
/// or <c>null</c> name will simply be registered using the workflow type name.
/// </para>
/// <para>
/// Workflow methods with a name will be registered using a combination of the workflow
/// type name and the method name, using <b>"::"</b> as the separator, like:
/// </para>
/// <code>
/// WORKFLOW-TYPENAME::METHOD-NAME
/// </code>
/// </note>
/// </remarks>
public TWorkflowInterface NewWorkflowStub <TWorkflowInterface>(WorkflowOptions options = null, string workflowTypeName = null)
where TWorkflowInterface : class
{
CadenceHelper.ValidateWorkflowInterface(typeof(TWorkflowInterface));
EnsureNotDisposed();
return(StubManager.NewWorkflowStub <TWorkflowInterface>(this, options: options, workflowTypeName: workflowTypeName));
}
public void Generate_ActivityEntryVoidWithOptions()
{
Assert.NotNull(StubManager.NewActivityStub <IActivityEntryVoidWithArgs>(client, new DummyWorkflow().Workflow, options: new ActivityOptions()
{
Domain = "my-domain"
}));
Assert.NotNull(StubManager.NewLocalActivityStub <IActivityEntryVoidWithArgs, ActivityEntryVoidWithArgs>(client, new DummyWorkflow().Workflow, options: new LocalActivityOptions()));
}
/// <summary>
/// Creates a typed workflow stub connected to a known workflow execution
/// using IDs. This can be used to signal and query the workflow via the
/// type-safe interface methods.
/// </summary>
/// <typeparam name="TWorkflowInterface">Identifies the workflow interface.</typeparam>
/// <param name="workflowId">Specifies the workflow ID.</param>
/// <param name="runId">Optionally specifies the workflow's run ID.</param>
/// <param name="domain">Optionally specifies a domain that </param>
/// <returns>The dynamically generated stub that implements the workflow methods defined by <typeparamref name="TWorkflowInterface"/>.</returns>
/// <remarks>
/// Unlike activity stubs, a workflow stub may only be used to launch a single
/// workflow. You'll need to create a new stub for each workflow you wish to
/// invoke and then the first method called on a workflow stub must be
/// the one of the methods tagged by <see cref="WorkflowMethodAttribute"/>.
/// </remarks>
public TWorkflowInterface NewWorkflowStub <TWorkflowInterface>(string workflowId, string runId = null, string domain = null)
where TWorkflowInterface : class
{
Covenant.Requires <ArgumentNullException>(!string.IsNullOrEmpty(workflowId), nameof(workflowId));
CadenceHelper.ValidateWorkflowInterface(typeof(TWorkflowInterface));
EnsureNotDisposed();
return(StubManager.NewWorkflowStub <TWorkflowInterface>(this, workflowId, runId, domain));
}
public void Generate_WorkflowResultWithOptions()
{
var stub = StubManager.NewWorkflowStub <IWorkflowEntryResultWithArgs>(client, options: new StartWorkflowOptions()
{
TaskQueue = "my-taskqueue", Namespace = "my-namespace"
});
Assert.NotNull(stub);
}
/// <summary>
/// Starts the target workflow that returns <typeparamref name="TResult"/>, passing any specified arguments.
/// </summary>
/// <typeparam name="TResult">The workflow result type.</typeparam>
/// <param name="args">The arguments to be passed to the workflow.</param>
/// <returns>The <see cref="ChildWorkflowFuture{T}"/> with the <see cref="ChildWorkflowFuture{T}.GetAsync"/> that can be used to retrieve the workfow result.</returns>
/// <exception cref="InvalidOperationException">Thrown when attempting to start a future stub more than once.</exception>
/// <remarks>
/// <para>
/// You must take care to pass parameters that are compatible with the target workflow parameters.
/// These are checked at runtime but not while compiling.
/// </para>
/// <note>
/// Any given <see cref="ChildWorkflowStub{TWorkflowInterface}"/> may only be executed once.
/// </note>
/// </remarks>
public async Task <ChildWorkflowFuture <TResult> > StartAsync <TResult>(params object[] args)
{
await SyncContext.Clear;
Covenant.Requires <ArgumentNullException>(parentWorkflow != null, nameof(parentWorkflow));
parentWorkflow.SetStackTrace();
if (hasStarted)
{
throw new InvalidOperationException("Cannot start a future stub more than once.");
}
var parameters = targetMethod.GetParameters();
if (parameters.Length != args.Length)
{
throw new ArgumentException($"Invalid number of parameters: [{parameters.Length}] expected but [{args.Length}] were passed.", nameof(parameters));
}
hasStarted = true;
// Cast the input parameters to the target types so that developers won't need to expicitly
// cast things like integers into longs, floats into doubles, etc.
for (int i = 0; i < args.Length; i++)
{
args[i] = TemporalHelper.ConvertArg(parameters[i].ParameterType, args[i]);
}
// Start the child workflow and then construct and return the future.
var client = parentWorkflow.Client;
var execution = await client.StartChildWorkflowAsync(parentWorkflow, workflowTypeName, TemporalHelper.ArgsToBytes(client.DataConverter, args), options);
// Initialize the type-safe stub property such that developers can call
// any query or signal methods.
Stub = StubManager.NewChildWorkflowStub <TWorkflowInterface>(client, parentWorkflow, workflowTypeName, execution);
// Create and return the future.
var resultType = targetMethod.ReturnType;
if (resultType == typeof(Task))
{
throw new ArgumentException($"Workflow method [{nameof(TWorkflowInterface)}.{targetMethod.Name}()] does not return [void].", nameof(TWorkflowInterface));
}
resultType = resultType.GenericTypeArguments.First();
if (!resultType.IsAssignableFrom(typeof(TResult)))
{
throw new ArgumentException($"Workflow method [{nameof(TWorkflowInterface)}.{targetMethod.Name}()] returns [{resultType.FullName}] which is not compatible with [{nameof(TResult)}].", nameof(TWorkflowInterface));
}
return(new ChildWorkflowFuture <TResult>(parentWorkflow, execution));
}
public void Generate_WorkflowResultWithOptions()
{
var stub = StubManager.NewWorkflowStub <IWorkflowEntryResultWithArgs>(client, options: new WorkflowOptions()
{
TaskList = "my-tasklist", Domain = "my-domain"
});
Assert.NotNull(stub);
}
public StubManagerTests()
{
var stubManagerOptions = new StubManagerOptions()
{
AutoGenerateUnknown = true, AutoResolveByNaming = true
};
_stubManager = new StubManager(stubManagerOptions,
new StubTypeCacheManager(new StubTypeMemoryCache(new DefaultStubTypeCacheKeyGenerator())),
new DefaultStubDataMappingProfile());
}
/// <summary>
/// Creates a typed workflow stub connected to a known workflow execution
/// using a <see cref="WorkflowExecution"/>. This can be used to signal and
/// query the workflow via the type-safe interface methods.
/// </summary>
/// <typeparam name="TWorkflowInterface">Identifies the workflow interface.</typeparam>
/// <param name="execution">Specifies the <see cref="WorkflowExecution"/>.</param>
/// <returns>The dynamically generated stub that implements the workflow methods defined by <typeparamref name="TWorkflowInterface"/>.</returns>
/// <remarks>
/// Unlike activity stubs, a workflow stub may only be used to launch a single
/// workflow. You'll need to create a new stub for each workflow you wish to
/// invoke and then the first method called on a workflow stub must be
/// the one of the methods tagged by <see cref="WorkflowMethodAttribute"/>.
/// </remarks>
public TWorkflowInterface NewWorkflowStub <TWorkflowInterface>(WorkflowExecution execution)
where TWorkflowInterface : class
{
Covenant.Requires <ArgumentNullException>(execution != null, nameof(execution));
Covenant.Requires <ArgumentNullException>(!string.IsNullOrEmpty(execution.WorkflowId), nameof(execution.WorkflowId));
Covenant.Requires <ArgumentNullException>(!string.IsNullOrEmpty(execution.RunId), nameof(execution.RunId));
CadenceHelper.ValidateWorkflowInterface(typeof(TWorkflowInterface));
EnsureNotDisposed();
return(StubManager.NewWorkflowStub <TWorkflowInterface>(this, execution.WorkflowId, execution.RunId));
}
/// <summary>
/// Starts the target workflow that returns <c>void</c>, passing any specified arguments.
/// </summary>
/// <param name="args">The arguments to be passed to the workflow.</param>
/// <returns>The <see cref="ChildWorkflowFuture{T}"/> with the <see cref="ChildWorkflowFuture{T}.GetAsync"/> than can be used to retrieve the workfow result.</returns>
/// <exception cref="InvalidOperationException">Thrown when attempting to start a future stub more than once.</exception>
/// <remarks>
/// <para>
/// You must take care to pass parameters that are compatible with the target workflow parameters.
/// These are checked at runtime but not while compiling.
/// </para>
/// <note>
/// Any given <see cref="ChildWorkflowStub{TWorkflowInterface}"/> may only be executed once.
/// </note>
/// </remarks>
public async Task <ChildWorkflowFuture> StartAsync(params object[] args)
{
await SyncContext.ClearAsync;
Covenant.Requires <ArgumentNullException>(parentWorkflow != null, nameof(parentWorkflow));
parentWorkflow.SetStackTrace();
if (hasStarted)
{
throw new InvalidOperationException("Cannot start a future stub more than once.");
}
var parameters = targetMethod.GetParameters();
if (parameters.Length != args.Length)
{
throw new ArgumentException($"Invalid number of parameters: [{parameters.Length}] expected but [{args.Length}] were passed.", nameof(parameters));
}
hasStarted = true;
// Cast the input parameters to the target types so that developers won't need to expicitly
// cast things like integers into longs, floats into doubles, etc.
for (int i = 0; i < args.Length; i++)
{
args[i] = TypeDescriptor.GetConverter(parameters[i].ParameterType).ConvertTo(args[i], parameters[i].ParameterType);
}
// Start the child workflow and then construct the future.
var client = parentWorkflow.Client;
var execution = await client.StartChildWorkflowAsync(parentWorkflow, workflowTypeName, client.DataConverter.ToData(args), options);
// Initialize the type-safe stub property such that developers can call
// any query or signal methods.
Stub = StubManager.NewChildWorkflowStub <TWorkflowInterface>(client, parentWorkflow, workflowTypeName, execution);
// Create and return the future.
return(new ChildWorkflowFuture(parentWorkflow, execution));
}
public void Generate_ActivityMultiMethods()
{
Assert.NotNull(StubManager.NewActivityStub <IActivityMultiMethods>(client, new DummyWorkflow().Workflow));
Assert.NotNull(StubManager.NewLocalActivityStub <IActivityMultiMethods, ActivityMultiMethods>(client, new DummyWorkflow().Workflow));
}
public void Generate_WorkflowResultWithOptions()
{
var stub = StubManager.CreateWorkflowStub <IWorkflowEntryResultWithArgs>(client, taskList: "my-tasklist", options: new WorkflowOptions(), domain: "my-domain");
Assert.NotNull(stub);
}
public void Generate_WorkflowResultWithArgs()
{
var stub = StubManager.CreateWorkflowStub <IWorkflowEntryResultWithArgs>(client);
Assert.NotNull(stub);
}
public void Generate_WorkflowMultiMethods()
{
var stub = StubManager.CreateWorkflowStub <IWorkflowMultiMethods>(client);
Assert.NotNull(stub);
}
public void Generate_WorkflowQueryVoidWithArgs()
{
var stub = StubManager.CreateWorkflowStub <IWorkflowQueryVoidWithArgs>(client);
Assert.NotNull(stub);
}
public void Error_ActivityNullClient()
{
// A non-NULL client is required.
Assert.Throws <ArgumentNullException>(() => StubManager.NewActivityStub <IErrorNoEntryPointActivity>(null, new DummyWorkflow().Workflow));
}
public void SetUp()
{
theSession = SessionUtilities.CreateEmptySession();
theManager = new StubManager();
theAdapter = new ClarifySessionAdapter(theSession, theManager);
}
public void Error_ActivityGenericsNotAllowed()
{
// We don't support activity interfaces with generic parameters.
Assert.Throws <ActivityTypeException>(() => StubManager.NewActivityStub <IErrorGenericActivity <int> >(client, new DummyWorkflow().Workflow));
}
public void Error_ActivityNotPublic()
{
// Activity interfaces must be public.
Assert.Throws <ActivityTypeException>(() => StubManager.NewActivityStub <IErrorNotPublicActivity>(client, new DummyWorkflow().Workflow));
}
public void Error_ActivityNonTaskEntryPoint()
{
// Activity entry points methods need to return a Task.
Assert.Throws <ActivityTypeException>(() => StubManager.NewActivityStub <IErrorNonTaskEntryPoint1Activity>(client, new DummyWorkflow().Workflow));
}
public void Error_ActivityNotInterface()
{
// Only activity interfaces are allowed.
Assert.Throws <ActivityTypeException>(() => StubManager.NewActivityStub <IErrorNotInterfaceActivity>(client, new DummyWorkflow().Workflow));
}
public void SetUp()
{
theSession = SessionUtilities.CreateEmptySession();
theManager = new StubManager();
theAdapter = new ClarifySessionAdapter(theSession, theManager);
}
public void Generate_ActivityEntryVoidWithArgs()
{
Assert.NotNull(StubManager.CreateActivityStub <IActivityEntryVoidWithArgs>(client, new DummyWorkflow(), "my-activity"));
Assert.NotNull(StubManager.CreateLocalActivityStub <IActivityEntryVoidWithArgs, ActivityEntryVoidWithArgs>(client, new DummyWorkflow()));
}
public void Generate_ActivityEntryVoidWithArgs()
{
Assert.NotNull(StubManager.NewActivityStub <IActivityEntryVoidWithArgs>(client, new DummyWorkflow().Workflow));
Assert.NotNull(StubManager.NewLocalActivityStub <IActivityEntryVoidWithArgs, ActivityEntryVoidWithArgs>(client, new DummyWorkflow().Workflow));
}
public void Error_ActivityNoEntryPoint()
{
// Activities need to have at least one entry point.
Assert.Throws <ActivityTypeException>(() => StubManager.NewActivityStub <IErrorNoEntryPointActivity>(client, new DummyWorkflow().Workflow));
}
/// <summary>
/// Signals Cadence that the application is capable of executing workflows and/or activities for a specific
/// domain and task list.
/// </summary>
/// <param name="taskList">Specifies the task list implemented by the worker. This must not be empty.</param>
/// <param name="options">Optionally specifies additional worker options.</param>
/// <param name="domain">Optionally overrides the default <see cref="CadenceClient"/> domain.</param>
/// <returns>A <see cref="Worker"/> identifying the worker instance.</returns>
/// <exception cref="ArgumentNullException">Thrown if <paramref name="taskList"/> is <c>null</c> or empty.</exception>
/// <exception cref="InvalidOperationException">
/// Thrown when an attempt is made to recreate a worker with the
/// same properties on a given client. See the note in the remarks.
/// </exception>
/// <remarks>
/// <note>
/// <see cref="CadenceClient"/> for more information on task lists.
/// </note>
/// <para>
/// Your workflow application will need to call this method so that Cadence will know
/// that it can schedule activities to run within the current process. You'll need
/// to specify the target Cadence domain and task list.
/// </para>
/// <para>
/// You may also specify an optional <see cref="WorkerOptions"/> parameter as well
/// as customize the name used to register the activity, which defaults to the
/// fully qualified name of the activity type.
/// </para>
/// <para>
/// This method returns a <see cref="Worker"/> which implements <see cref="IDisposable"/>.
/// It's a best practice to call <see cref="Dispose()"/> just before the a worker process
/// terminates, but this is optional. Advanced worker implementation that need to change
/// their configuration over time can also call <see cref="Dispose()"/> to stop workers
/// for specific domains and task lists.
/// </para>
/// <note>
/// The Cadence GOLANG client does not appear to support starting a worker with a given
/// set of parameters, stopping that workflow, and then restarting another worker
/// with the same parameters on the same client. This method detects this situation
/// and throws an <see cref="InvalidOperationException"/> when a restart is attempted.
/// </note>
/// </remarks>
public async Task <Worker> StartWorkerAsync(string taskList, WorkerOptions options = null, string domain = null)
{
await SyncContext.ClearAsync;
Covenant.Requires <ArgumentNullException>(!string.IsNullOrEmpty(taskList), nameof(taskList), "Workers must be started with a non-empty workflow.");
EnsureNotDisposed();
options = options ?? new WorkerOptions();
domain = ResolveDomain(domain);
WorkerMode mode = options.Mode;
Worker worker;
try
{
using (await workerRegistrationMutex.AcquireAsync())
{
// Ensure that we haven't already registered a worker for the
// specified activity, domain, and task list. We'll just increment
// the reference count for the existing worker and return it
// in this case.
//
// I know that this is a linear search but the number of activity
// registrations per service will generally be very small and
// registrations will happen infrequently (typically just once
// per service, when it starts).
// $note(jefflill):
//
// If the worker exists but its RefCount==0, then we're going to
// throw an exception because Cadence doesn't support recreating
// a worker with the same parameters on the same client.
worker = workers.Values.SingleOrDefault(wf => wf.Mode == mode && wf.Domain == domain && wf.Tasklist == taskList);
if (worker != null)
{
if (worker.RefCount < 0)
{
throw new InvalidOperationException("A worker with these same parameters has already been started and stopped on this Cadence client. Cadence does not support recreating workers for a given client instance.");
}
Interlocked.Increment(ref worker.RefCount);
return(worker);
}
options = options ?? new WorkerOptions();
var reply = (NewWorkerReply)(await CallProxyAsync(
new NewWorkerRequest()
{
Domain = ResolveDomain(domain),
TaskList = taskList,
Options = options.ToInternal()
}));
reply.ThrowOnError();
worker = new Worker(this, mode, reply.WorkerId, domain, taskList);
workers.Add(reply.WorkerId, worker);
}
}
finally
{
switch (mode)
{
case WorkerMode.Activity:
activityWorkerStarted = true;
break;
case WorkerMode.Workflow:
workflowWorkerStarted = true;
break;
case WorkerMode.Both:
activityWorkerStarted = true;
workflowWorkerStarted = true;
break;
default:
throw new NotImplementedException();
}
}
// Fetch the stub for each registered workflow and activity type so that
// they'll be precompiled so compilation won't impact workflow and activity
// performance including potentially intruducing enough delay to cause
// decision tasks or activity heartbeats to fail (in very rare situations).
//
// Note that the compiled stubs are cached, so we don't need to worry
// about compiling stubs for types more than once causing a problem.
lock (registeredWorkflowTypes)
{
foreach (var workflowInterface in registeredWorkflowTypes)
{
// Workflows, we're going to compile both the external and child
// versions of the stubs.
StubManager.GetWorkflowStub(workflowInterface, isChild: false);
StubManager.GetWorkflowStub(workflowInterface, isChild: true);
}
}
lock (registeredActivityTypes)
{
foreach (var activityInterface in registeredActivityTypes)
{
StubManager.GetActivityStub(activityInterface);
}
}
return(worker);
}
public void Generate_ActivityEntryVoidWithOptions()
{
Assert.NotNull(StubManager.CreateActivityStub <IActivityEntryVoidWithArgs>(client, new DummyWorkflow(), "my-activity", options: new ActivityOptions(), domain: "my-domain"));
Assert.NotNull(StubManager.CreateLocalActivityStub <IActivityEntryVoidWithArgs, ActivityEntryVoidWithArgs>(client, new DummyWorkflow(), options: new LocalActivityOptions()));
}