Constraint UnrootedRequestRule()
{
DelegateInArgument<SendReply> sendReply = new DelegateInArgument<SendReply>();
DelegateInArgument<ValidationContext> context = new DelegateInArgument<ValidationContext>();
DelegateInArgument<Activity> activityInTree = new DelegateInArgument<Activity>();
Variable<bool> requestInTree = new Variable<bool> { Default = false };
return new Constraint<SendReply>
{
Body = new ActivityAction<SendReply, ValidationContext>
{
Argument1 = sendReply,
Argument2 = context,
Handler = new Sequence
{
Variables = { requestInTree },
Activities =
{
new If
{
Condition = new InArgument<bool>(ctx => sendReply.Get(ctx).Request != null),
Then = new Sequence
{
Activities =
{
new ForEach<Activity>
{
Values = new GetWorkflowTree
{
ValidationContext = context,
},
Body = new ActivityAction<Activity>
{
Argument = activityInTree,
Handler = new If
{
Condition = new InArgument<bool>(ctx => activityInTree.Get(ctx) == sendReply.Get(ctx).Request),
Then = new Assign<bool>
{
To = requestInTree,
Value = true,
}
}
}
},
new AssertValidation
{
Assertion = new InArgument<bool>(ctx => requestInTree.Get(ctx)),
IsWarning = false,
Message = new InArgument<string>(ctx => string.Format(CultureInfo.CurrentCulture, System.Activities.Core.Presentation.SR.UnrootedRequestInSendReply, sendReply.Get(ctx).DisplayName))
}
}
}
}
}
}
}
};
}
public static Constraint VerifyParentIsWorkflowActivity()
{
DelegateInArgument<Activity> element = new DelegateInArgument<Activity>();
DelegateInArgument<ValidationContext> context = new DelegateInArgument<ValidationContext>();
DelegateInArgument<Activity> parent = new DelegateInArgument<Activity>();
Variable<bool> result = new Variable<bool>();
return new Constraint<Activity>
{
Body = new ActivityAction<Activity, ValidationContext>
{
Argument1 = element,
Argument2 = context,
Handler = new Sequence
{
Variables =
{
result
},
Activities =
{
new ForEach<Activity>
{
Values = new GetParentChain
{
ValidationContext = context,
},
Body = new ActivityAction<Activity>
{
Argument = parent,
Handler = new If
{
Condition = new InArgument<bool>((env) => parent.Get(env).IsWorkflowActivity()),
Then = new Assign<bool>
{
Value = true,
To = result,
},
},
},
},
new AssertValidation
{
Assertion = new InArgument<bool>((env) => result.Get(env)),
Message = new InArgument<string>((env) => $"{element.Get(env).GetType().GetFriendlyName()} can only be added inside a {typeof(WorkflowActivity<,>).GetFriendlyName()} activity."),
PropertyName = new InArgument<string>((env) => element.Get(env).DisplayName),
},
},
},
},
};
}
private static Activity CreatePrintProcessActivity(Variable<Collection<Process>> processes)
{
var proc = new DelegateInArgument<Process>("process");
return new Sequence
{
Activities =
{
// Loop over processes and print them out.
new ForEach<Process>
{
Values = processes,
Body = new ActivityAction<Process>
{
Argument = proc,
Handler = new WriteLine
{
Text = new InArgument<string>(ctx => proc.Get(ctx).ToString()),
}
}
},
// Print out a new line.
new WriteLine(),
}
};
}
// Creates a workflow that uses FindInSqlTable activity with a more complex predicate to retrieve entities from a Sql Server Database
static Activity CreateRetrieveWithComplexPredicateWF()
{
Variable<IList<Employee>> employees = new Variable<IList<Employee>>();
DelegateInArgument<Employee> employeeIterationVariable = new DelegateInArgument<Employee>();
return new Sequence()
{
Variables = { employees },
Activities =
{
new WriteLine { Text = "\r\nEmployees by Role and Location (more complex predicate)\r\n============================================" },
new FindInSqlTable<Employee>
{
ConnectionString = cnn,
Predicate = new LambdaValue<Func<Employee, bool>>(c => new Func<Employee, bool>(emp => emp.Role.Equals("PM") && emp.Location.Equals("Redmond"))),
Result = new OutArgument<IList<Employee>>(employees)
},
new ForEach<Employee>
{
Values = new InArgument<IEnumerable<Employee>>(employees),
Body = new ActivityAction<Employee>()
{
Argument = employeeIterationVariable,
Handler = new WriteLine { Text = new InArgument<string>(env => employeeIterationVariable.Get(env).ToString()) }
}
}
}
};
}
// Creates a workflow that uses FindInTable activity without predicate to retrieve entities from a Sql Server Database
static Activity CreateRetrieveWithoutPredicateWF()
{
Variable<IList<Role>> roles = new Variable<IList<Role>>();
DelegateInArgument<Role> roleIterationVariable = new DelegateInArgument<Role>();
return new Sequence()
{
Variables = { roles },
Activities =
{
new WriteLine { Text = "\r\nAll Roles (no predicates)\r\n==============" },
new FindInSqlTable<Role>
{
ConnectionString = cnn,
Result = new OutArgument<IList<Role>>(roles)
},
new ForEach<Role>
{
Values = new InArgument<IEnumerable<Role>>(roles),
Body = new ActivityAction<Role>()
{
Argument = roleIterationVariable ,
Handler = new WriteLine { Text = new InArgument<string>(env => roleIterationVariable.Get(env).Name) }
}
}
}
};
}
static void Main(string[] args)
{
// iteration variable for the ForEach
var item = new DelegateInArgument<object>();
// list of elements to iterate
ArrayList list = new ArrayList();
list.Add("Bill");
list.Add("Steve");
list.Add("Ray");
// iterate through the list and show the elements
Activity act =
new ForEach
{
Values = new InArgument<IEnumerable>(ctx=>list),
Body = new ActivityAction<object>
{
Argument = item,
Handler = new WriteLine { Text = new InArgument<string>(c => item.Get(c).ToString()) }
}
};
WorkflowInvoker.Invoke(act);
Console.WriteLine("");
Console.WriteLine("Press enter to exit...");
Console.ReadLine();
}
// Constraint is just an activity that contains validation logic.
public static Constraint ConstraintError_IfShouldHaveThenOrElse()
{
DelegateInArgument<If> element = new DelegateInArgument<If>();
return new Constraint<If>
{
Body = new ActivityAction<If, ValidationContext>
{
Argument1 = element,
Handler = new AssertValidation
{
Assertion = new InArgument<bool>(env => (element.Get(env).Then != null) || (element.Get(env).Else != null)),
Message = new InArgument<string>("'If' activity should have either Then or Else activity set."),
}
}
};
}
public static Constraint ConstraintWarning_PickHasOneBranch()
{
DelegateInArgument<Pick> element = new DelegateInArgument<Pick>();
return new Constraint<Pick>
{
Body = new ActivityAction<Pick, ValidationContext>
{
Argument1 = element,
Handler = new AssertValidation
{
IsWarning = true,
Assertion = new InArgument<bool>(env => (element.Get(env).Branches.Count == 0) || (element.Get(env).Branches.Count > 1)),
Message = new InArgument<string>("This Pick activity has only one branch so the Pick itself is redundant."),
}
}
};
}
/// <summary>
/// Validates whether the Twilio activity is contained within a CallScope activity.
/// </summary>
/// <returns></returns>
internal static Constraint<Activity> MustBeInsideCallScopeConstraint()
{
var activityBeingValidated = new DelegateInArgument<Activity>();
var validationContext = new DelegateInArgument<ValidationContext>();
var parent = new DelegateInArgument<Activity>();
var parentIsCallScope = new Variable<bool>();
return new Constraint<Activity>()
{
Body = new ActivityAction<Activity, ValidationContext>()
{
Argument1 = activityBeingValidated,
Argument2 = validationContext,
Handler = new Sequence()
{
Variables =
{
parentIsCallScope,
},
Activities =
{
new ForEach<Activity>()
{
Values = new GetParentChain()
{
ValidationContext = validationContext,
},
Body = new ActivityAction<Activity>()
{
Argument = parent,
Handler = new If(env => parent.Get(env).GetType() == typeof(CallScope))
{
Then = new Assign<bool>()
{
To = parentIsCallScope,
Value = true,
},
},
},
},
new AssertValidation()
{
Assertion = parentIsCallScope,
Message = "Twilio activities must be nested inside of a CallScope",
IsWarning = false,
},
},
},
},
};
}
/// <summary>
/// Validates whether the Leave activity is contained inside of an Enqueue activity.
/// </summary>
/// <returns></returns>
Constraint<Leave> MustBeContainedInEnqueue()
{
var activityBeingValidated = new DelegateInArgument<Leave>();
var validationContext = new DelegateInArgument<ValidationContext>();
var outer = new DelegateInArgument<Activity>();
var enqueueIsOuter = new Variable<bool>();
return new Constraint<Leave>()
{
Body = new ActivityAction<Leave, ValidationContext>()
{
Argument1 = activityBeingValidated,
Argument2 = validationContext,
Handler = new Sequence()
{
Variables =
{
enqueueIsOuter,
},
Activities =
{
new ForEach<Activity>()
{
Values = new GetParentChain()
{
ValidationContext = validationContext,
},
Body = new ActivityAction<Activity>()
{
Argument = outer,
Handler = new If(env => typeof(Enqueue).IsAssignableFrom(outer.Get(env).GetType()))
{
Then = new Assign<bool>()
{
To = enqueueIsOuter,
Value = true,
},
},
},
},
new AssertValidation()
{
Assertion = enqueueIsOuter,
Message = "Leave must be contained inside of an Enqueue.",
IsWarning = false,
},
},
},
},
};
}
/// <summary>
/// Validates whether the DialNoun activity is contained within a Dial activity.
/// </summary>
/// <returns></returns>
Constraint<DialNoun> MustBeInsideDialActivityConstraint()
{
var activityBeingValidated = new DelegateInArgument<DialNoun>();
var validationContext = new DelegateInArgument<ValidationContext>();
var parent = new DelegateInArgument<Activity>();
var parentIsOuter = new Variable<bool>();
return new Constraint<DialNoun>()
{
Body = new ActivityAction<DialNoun, ValidationContext>()
{
Argument1 = activityBeingValidated,
Argument2 = validationContext,
Handler = new Sequence()
{
Variables =
{
parentIsOuter,
},
Activities =
{
new ForEach<Activity>()
{
Values = new GetParentChain()
{
ValidationContext = validationContext,
},
Body = new ActivityAction<Activity>()
{
Argument = parent,
Handler = new If(env => parent.Get(env).GetType() == typeof(Dial))
{
Then = new Assign<bool>()
{
To = parentIsOuter,
Value = true,
},
},
},
},
new AssertValidation()
{
Assertion = parentIsOuter,
Message = "DialNouns must be nested inside Dial",
IsWarning = false,
},
},
},
},
};
}
static Activity CreateWF()
{
DelegateInArgument<string> current = new DelegateInArgument<string>();
IList<string> data = new List<string>();
for (int i = 1; i < 11; i++)
{
data.Add(string.Format("Branch {0}", i));
}
Variable<int> waitTime = new Variable<int>();
return
new Sequence
{
Variables = { waitTime },
Activities =
{
new ThrottledParallelForEach<string>
{
Values = new LambdaValue<IEnumerable<string>>(c => data),
MaxConcurrentBranches = 3,
Body = new ActivityAction<string>
{
Argument = current,
Handler = new Sequence
{
Activities =
{
new WriteLine() { Text = new InArgument<string>(ctx => string.Format("Enter {0}", current.Get(ctx))) },
new Assign<int> { To = waitTime, Value = new InArgument<int>(ctx => new Random().Next(0, 2500)) },
new WriteLine() { Text = new InArgument<string>(ctx => string.Format("...{0} will wait for {1} millisenconds...", current.Get(ctx), waitTime.Get(ctx))) },
new Delay { Duration = new InArgument<TimeSpan>(ctx => new TimeSpan(0,0,0,0, waitTime.Get(ctx))) },
new WriteLine() { Text = new InArgument<string>(ctx => string.Format("......Exit {0}", current.Get(ctx))) },
}
}
}
}
}
};
}
static Constraint CheckParent()
{
DelegateInArgument<CreateState> element = new DelegateInArgument<CreateState>();
DelegateInArgument<ValidationContext> context = new DelegateInArgument<ValidationContext>();
Variable<bool> result = new Variable<bool>();
DelegateInArgument<Activity> parent = new DelegateInArgument<Activity>();
return new Constraint<CreateState>
{
Body = new ActivityAction<CreateState,ValidationContext>
{
Argument1 = element,
Argument2 = context,
Handler = new Sequence
{
Variables =
{
result
},
Activities =
{
new ForEach<Activity>
{
Values = new GetParentChain
{
ValidationContext = context
},
Body = new ActivityAction<Activity>
{
Argument = parent,
Handler = new If()
{
Condition = new InArgument<bool>((env) => object.Equals(parent.Get(env).GetType(),typeof(CreateCountry))),
Then = new Assign<bool>
{
Value = true,
To = result
}
}
}
},
new AssertValidation
{
Assertion = new InArgument<bool>(result),
Message = new InArgument<string> ("CreateState has to be inside a CreateCountry activity"),
}
}
}
}
};
}
public static Constraint VerifyParentIsObjectContextScope(Activity activity)
{
DelegateInArgument<Activity> element = new DelegateInArgument<Activity>();
DelegateInArgument<ValidationContext> context = new DelegateInArgument<ValidationContext>();
DelegateInArgument<Activity> child = new DelegateInArgument<Activity>();
Variable<bool> result = new Variable<bool>();
return new Constraint<Activity>
{
Body = new ActivityAction<Activity, ValidationContext>
{
Argument1 = element,
Argument2 = context,
Handler = new Sequence
{
Variables = { result },
Activities =
{
new ForEach<Activity>
{
Values = new GetParentChain
{
ValidationContext = context
},
Body = new ActivityAction<Activity>
{
Argument = child,
Handler = new If
{
Condition = new InArgument<bool>((env) => object.Equals(child.Get(env).GetType(), typeof(ObjectContextScope))),
Then = new Assign<bool>
{
Value = true,
To = result
}
}
}
},
new AssertValidation
{
Assertion = new InArgument<bool>(env => result.Get(env)),
Message = new InArgument<string> (string.Format("{0} can only be added inside an ObjectContextScope activity.", activity.GetType().Name)),
PropertyName = new InArgument<string>((env) => element.Get(env).DisplayName)
}
}
}
}
};
}
static RangeEnumeration Enumerate(int start, int stop, int step)
{
Console.WriteLine("Starting enumeration of a series of numbers from {0} to {1} using steps of {2}", start, stop, step);
DelegateInArgument<int> loopVariable = new DelegateInArgument<int>();
return new RangeEnumeration
{
Start = start,
Stop = stop,
Step = step,
Body = new ActivityAction<int>
{
Argument = loopVariable,
Handler = new WriteLine
{
Text = new InArgument<string>(context => "This is " + loopVariable.Get(context).ToString()),
},
}
};
}
static void Main(string[] args)
{
// iteration variable for the ForEach
var item = new DelegateInArgument<object>();
// list of elements to iterate
ArrayList list = new ArrayList();
list.Add("Bill");
list.Add("Steve");
list.Add("Ray");
// iterate through the list and show the elements
Activity act =
new ParallelForEach
{
Values = new InArgument<IEnumerable>(ctx => list),
Body = new ActivityAction<object>
{
Argument = item,
Handler = new InvokeMethod
{
TargetType = typeof(Program),
MethodName = "ShowThreadId",
RunAsynchronously = true,
Parameters =
{
new InArgument<string>(c => item.Get(c).ToString())
}
}
}
};
WorkflowInvoker.Invoke(act);
Console.WriteLine("");
Console.WriteLine("Press enter to exit...");
Console.ReadLine();
}
public static Constraint SetReceiveRequestSendResponseScopeExecutionPropertyFactory()
{
DelegateInArgument<ReceiveRequestSendResponseScope> element = new DelegateInArgument<ReceiveRequestSendResponseScope>();
DelegateInArgument<ValidationContext> context = new DelegateInArgument<ValidationContext>();
DelegateInArgument<Activity> child = new DelegateInArgument<Activity>();
return new Constraint<ReceiveRequestSendResponseScope>
{
Body = new ActivityAction<ReceiveRequestSendResponseScope, ValidationContext>
{
Argument1 = element,
Argument2 = context,
Handler = new ForEach<Activity>
{
Values = new GetChildSubtree
{
ValidationContext = context,
},
Body = new ActivityAction<Activity>
{
Argument = child,
Handler = new If
{
Condition = new InArgument<bool>((env) => child.Get(env) is ISendResponse),
Then = new ReceiveRequestSendResponseScope.ReceiveRequestSendResponseScopeExecutionPropertyFactorySetter
{
ISendResponse = new InArgument<ISendResponse>((env) => child.Get(env) as ISendResponse),
ReceiveRequestSendResponseScope = new InArgument<ReceiveRequestSendResponseScope>((env) => element.Get(env)),
},
},
},
},
},
};
}
public static Constraint VerifyReceiveRequestSendResponseScopeChildren()
{
DelegateInArgument<ReceiveRequestSendResponseScope> element = new DelegateInArgument<ReceiveRequestSendResponseScope>();
DelegateInArgument<ValidationContext> context = new DelegateInArgument<ValidationContext>();
DelegateInArgument<Activity> child = new DelegateInArgument<Activity>();
Variable<int> receiveRequestCounter = new Variable<int>();
Variable<int> sendResponseCounter = new Variable<int>();
return new Constraint<ReceiveRequestSendResponseScope>
{
Body = new ActivityAction<ReceiveRequestSendResponseScope, ValidationContext>
{
Argument1 = element,
Argument2 = context,
Handler = new Sequence
{
Variables =
{
receiveRequestCounter,
sendResponseCounter,
},
Activities =
{
new Assign<int>
{
Value = 0,
To = receiveRequestCounter,
},
new Assign<int>
{
Value = 0,
To = sendResponseCounter,
},
new ForEach<Activity>
{
Values = new GetChildSubtree
{
ValidationContext = context,
},
Body = new ActivityAction<Activity>
{
Argument = child,
Handler = new Sequence
{
Activities =
{
new If
{
Condition = new InArgument<bool>((env) => child.Get(env) is IReceiveRequest),
Then = new Assign<int>
{
Value = new InArgument<int>((env) => receiveRequestCounter.Get(env) + 1),
To = receiveRequestCounter
},
},
new If
{
Condition = new InArgument<bool>((env) => child.Get(env) is ISendResponse),
Then = new Assign<int>
{
Value = new InArgument<int>((env) => sendResponseCounter.Get(env) + 1),
To = sendResponseCounter
},
},
},
},
},
},
new AssertValidation
{
Assertion = new InArgument<bool>((env) => receiveRequestCounter.Get(env) == 1),
Message = new InArgument<string> ($"{nameof(ReceiveRequestSendResponseScope)} activity must contain one and only one {nameof(ReceiveRequest)} activity"),
PropertyName = new InArgument<string>((env) => element.Get(env).DisplayName)
},
new AssertValidation
{
Assertion = new InArgument<bool>((env) => sendResponseCounter.Get(env) == 1),
Message = new InArgument<string> ($"{nameof(ReceiveRequestSendResponseScope)} activity must contain one and only one {nameof(SendResponse)} activity"),
PropertyName = new InArgument<string>((env) => element.Get(env).DisplayName)
},
},
},
},
};
}
public static Constraint SetWorkflowInterfaceOperationNames()
{
DelegateInArgument<ReceiveRequestSendResponseScope> element = new DelegateInArgument<ReceiveRequestSendResponseScope>();
DelegateInArgument<ValidationContext> context = new DelegateInArgument<ValidationContext>();
DelegateInArgument<Activity> parent = new DelegateInArgument<Activity>();
DelegateInArgument<Activity> child = new DelegateInArgument<Activity>();
Variable<IOperationActivity> receiveRequest = new Variable<IOperationActivity>();
Variable<Type> workflowInterfaceType = new Variable<Type>();
Variable<Type> requestResultType = new Variable<Type>();
Variable<Type> responseParameterType = new Variable<Type>();
return new Constraint<ReceiveRequestSendResponseScope>
{
Body = new ActivityAction<ReceiveRequestSendResponseScope, ValidationContext>
{
Argument1 = element,
Argument2 = context,
Handler = new Sequence
{
Variables =
{
receiveRequest,
workflowInterfaceType,
requestResultType,
responseParameterType,
},
Activities =
{
new ForEach<Activity>
{
Values = new GetParentChain
{
ValidationContext = context,
},
Body = new ActivityAction<Activity>
{
Argument = parent,
Handler = new If
{
Condition = new InArgument<bool>((env) => parent.Get(env).IsWorkflowActivity()),
Then = new Assign<Type>
{
Value = new InArgument<Type>((env) => parent.Get(env).GetWorkflowActivityType().GetGenericArguments()[(int)TypeParameterIndex.WorkflowInterface]),
To = workflowInterfaceType,
},
},
},
},
new ForEach<Activity>
{
Values = new GetChildSubtree
{
ValidationContext = context,
},
Body = new ActivityAction<Activity>
{
Argument = child,
Handler = new Sequence
{
Activities =
{
new If
{
Condition = new InArgument<bool>((env) => child.Get(env) is IReceiveRequest),
Then = new Sequence
{
Activities =
{
new Assign<IOperationActivity>
{
Value = new InArgument<IOperationActivity>((env) => child.Get(env) as IOperationActivity),
To = receiveRequest
},
new Assign<Type>
{
Value = new InArgument<Type>((env) => (child.Get(env) as IReceiveRequest).RequestResultType),
To = requestResultType
},
},
},
},
new If
{
Condition = new InArgument<bool>((env) => child.Get(env) is ISendResponse),
Then = new Assign<Type>
{
Value = new InArgument<Type>((env) => (child.Get(env) as ISendResponse).ResponseParameterType),
To = responseParameterType
},
},
},
},
},
},
new WorkflowInterfaceOperationNamesSetter
{
ReceiveRequest = new InArgument<IOperationActivity>((env) => receiveRequest.Get(env)),
WorkflowInterfaceType = new InArgument<Type>((env) => workflowInterfaceType.Get(env)),
RequestResultType = new InArgument<Type>((env) => requestResultType.Get(env)),
ResponseParameterType = new InArgument<Type>((env) => responseParameterType.Get(env)),
},
},
},
},
};
}
/// <summary>
/// Creates the code for wrapping an activity.
/// Returns a <see cref="System.Activities.Statements.TryCatch "/>activity that implements error handling logic
/// </summary>
/// <returns>The code for wrapping activity</returns>
internal Activity CreateBody()
{
var exceptionArgument = new DelegateInArgument<Exception>();
return new TryCatch
{
Try = this.CreateInternalBody(),
Catches =
{
new Catch<FailingBuildException>
{
Action = new ActivityAction<FailingBuildException>
{
Handler = new @If
{
Condition = new InArgument<bool>(env => this.IgnoreExceptions.Get(env)),
Else = new Rethrow()
}
}
},
new Catch<Exception>
{
Action = new ActivityAction<Exception>
{
Argument = exceptionArgument,
Handler = new Sequence
{
Activities =
{
new @If
{
Condition = new InArgument<bool>(env => this.LogExceptionStack.Get(env)),
Then = new LogBuildError
{
Message = new InArgument<string>(env => FormatLogExceptionStackMessage(exceptionArgument.Get(env)))
}
},
new @If
{
Condition = new InArgument<bool>(env => this.IgnoreExceptions.Get(env)),
Else = new Rethrow()
}
}
}
}
}
}
};
}
static Activity GetClientWorkflow()
{
Variable<PurchaseOrder> po = new Variable<PurchaseOrder>();
Variable<bool> invalidorder = new Variable<bool>() { Default = true };
Variable<string> replytext = new Variable<string>();
DelegateInArgument<FaultException<POFault>> poFault = new DelegateInArgument<FaultException<POFault>>();
DelegateInArgument<FaultException<ExceptionDetail>> unexpectedFault = new DelegateInArgument<FaultException<ExceptionDetail>>();
// submits a purchase order for the part and quantity stored in the po variable
Send submitPO = new Send
{
Endpoint = new Endpoint
{
Binding = Constants.Binding,
AddressUri = new Uri(Constants.ServiceAddress)
},
ServiceContractName = Constants.POContractName,
OperationName = Constants.SubmitPOName,
KnownTypes = { typeof(POFault) },
Content = SendContent.Create(new InArgument<PurchaseOrder>(po))
};
return new CorrelationScope
{
Body = new Sequence
{
Variables = { invalidorder, po },
Activities =
{
// defines the original desired parts and quantity: 155 pencils
new Assign<PurchaseOrder>
{
To = po,
Value = new InArgument<PurchaseOrder>( (e) => new PurchaseOrder() { PartName = "Pencil", Quantity = 155 } )
},
new While
{
// loop until a valid order is submitted
Condition = invalidorder,
Variables = { replytext },
Body = new Sequence
{
Activities =
{
// print out the order that will be submitted
new WriteLine { Text = new InArgument<string>((env) => string.Format("Submitting Order: {0} {1}s", po.Get(env).Quantity, po.Get(env).PartName)) },
// submit the order
submitPO,
new TryCatch
{
Try = new Sequence
{
Activities =
{
// receive the result of the order
// if ReceiveReply gets a Fault message, then we will handle those faults below
new ReceiveReply
{
Request = submitPO,
Content = ReceiveContent.Create(new OutArgument<string>(replytext))
},
new WriteLine { Text = replytext },
// this order must be valid, so set invalidorder to false
new Assign<bool>
{
To = invalidorder,
Value = false
}
}
},
Catches =
{
// catch a known Fault type: POFault
new Catch<FaultException<POFault>>
{
Action = new ActivityAction<FaultException<POFault>>
{
Argument = poFault,
Handler = new Sequence
{
Activities =
{
// print out the details of the POFault
new WriteLine { Text = new InArgument<string>((env) => string.Format("\tReceived POFault: {0}", poFault.Get(env).Reason.ToString())) },
new WriteLine { Text = new InArgument<string>((env) => string.Format("\tPOFault Problem: {0}", poFault.Get(env).Detail.Problem)) },
new WriteLine { Text = new InArgument<string>((env) => string.Format("\tPOFault Solution: {0}", poFault.Get(env).Detail.Solution)) },
// update the order to buy Widgets instead
new Assign<string>
{
To = new OutArgument<string>( (e) => po.Get(e).PartName ),
Value = "Widget"
}
}
}
}
},
// catch any unknown fault types
new Catch<FaultException<ExceptionDetail>>
{
Action = new ActivityAction<FaultException<ExceptionDetail>>
{
Argument = unexpectedFault,
Handler = new Sequence
{
Activities =
{
// print out the details of the fault
new WriteLine
{
Text = new InArgument<string>((e) => string.Format("\tReceived Fault: {0}",
unexpectedFault.Get(e).Message
))
},
// update the order to buy 10 less of the item
new Assign<int>
{
To = new OutArgument<int>( (e) => po.Get(e).Quantity ),
Value = new InArgument<int>( (e) => po.Get(e).Quantity - 10 )
}
}
}
}
},
}
}
}
}
},
new WriteLine { Text = "Order successfully processed." }
}
}
};
}
private Constraint ValidateActivitiesConstraint(string runtimeAssembly, PSWorkflowValidationResults validationResults)
{
DelegateInArgument<Activity> activityToValidate = new DelegateInArgument<Activity>();
DelegateInArgument<ValidationContext> validationContext = new DelegateInArgument<ValidationContext>();
return new Constraint<Activity>
{
Body = new ActivityAction<Activity, ValidationContext>
{
Argument1 = activityToValidate,
Argument2 = validationContext,
Handler = new AssertValidation
{
IsWarning = false,
Assertion = new InArgument<bool>(
env => ValidateActivity(activityToValidate.Get(env), runtimeAssembly, validationResults)),
Message = new InArgument<string>(
env => string.Format(CultureInfo.CurrentCulture, Resources.InvalidActivity, activityToValidate.Get(env).GetType().FullName))
}
}
};
}
// Create a validation to verify that there are no Persist activites inside of a NoPersistScope
static Constraint VerifiyNoChildPersistActivity()
{
DelegateInArgument<NoPersistScope> element = new DelegateInArgument<NoPersistScope>();
DelegateInArgument<ValidationContext> context = new DelegateInArgument<ValidationContext>();
DelegateInArgument<Activity> child = new DelegateInArgument<Activity>();
Variable<bool> result = new Variable<bool>();
return new Constraint<NoPersistScope>
{
Body = new ActivityAction<NoPersistScope, ValidationContext>
{
Argument1 = element,
Argument2 = context,
Handler = new Sequence
{
Variables =
{
result
},
Activities =
{
new ForEach<Activity>
{
Values = new GetChildSubtree
{
ValidationContext = context
},
Body = new ActivityAction<Activity>
{
Argument = child,
Handler = new If()
{
Condition = new InArgument<bool>((env) => object.Equals(child.Get(env).GetType(),typeof(Persist))),
Then = new Assign<bool>
{
Value = true,
To = result
}
}
}
},
new AssertValidation
{
Assertion = new InArgument<bool>(env => !result.Get(env)),
Message = new InArgument<string> ("NoPersistScope activity can't contain a Persist activity"),
PropertyName = new InArgument<string>((env) => element.Get(env).DisplayName)
}
}
}
}
};
}
/// <summary>
/// Create the structure of the activity for pausing between successive polling activities.
/// </summary>
/// <returns>An activity delegate.</returns>
private static ActivityAction<int> CreateDelayBody()
{
var timeout = new DelegateInArgument<int> { Name = "FuncTimeout" };
return new ActivityAction<int>
{
Argument = timeout,
Handler = new Delay
{
Duration = new InArgument<TimeSpan>(ctx => TimeSpan.FromSeconds(timeout.Get(ctx)))
}
};
}
// This scenario shows how to query for a set of entities from the database using EntitySql
private static Activity EntitySqlQueryExample(string connStr)
{
Variable<IEnumerable<Customer>> londonCustomers = new Variable<IEnumerable<Customer>>();
DelegateInArgument<Customer> iterationVariable = new DelegateInArgument<Customer>();
// create and return the workflow
return new ObjectContextScope
{
ConnectionString = new InArgument<string>(connStr),
ContainerName = "NorthwindEntities",
Variables = { londonCustomers },
Body = new Sequence
{
Activities =
{
new WriteLine { Text = "Executing query" },
// query for all customers that are in london
new EntitySqlQuery<Customer>
{
EntitySql = @"SELECT VALUE Customer
FROM NorthwindEntities.Customers AS Customer
WHERE Customer.City = 'London' ORDER BY Customer.ContactName",
Result = londonCustomers
},
new WriteLine { Text = "Query executed - printing results: " },
new WriteLine { },
// iterate through the list of customers, and display them in the console
new ForEach<Customer>
{
Values = londonCustomers,
Body = new ActivityAction<Customer>
{
Argument = iterationVariable,
Handler = new WriteLine { Text = new InArgument<String>(e => iterationVariable.Get(e).ContactName) }
}
}
}
}
};
}
// This scenario shows how to query for a set of entities from the database using a Linq predicate
private static Activity EntityLinqQueryExample(string connStr)
{
Variable<IEnumerable<Customer>> londonCustomers = new Variable<IEnumerable<Customer>>() { Name = "LondonCustomers" };
DelegateInArgument<Customer> iterationVariable = new DelegateInArgument<Customer>() { Name = "iterationVariable" };
return new ObjectContextScope
{
ConnectionString = new InArgument<string>(connStr),
ContainerName = "NorthwindEntities",
Variables = { londonCustomers },
Body = new Sequence
{
Activities =
{
new WriteLine { Text = "Executing query" },
// return all the customers that match with the provided Linq predicate
new EntityLinqQuery<Customer>
{
Predicate = new LambdaValue<Func<Customer, bool>>(ctx => new Func<Customer, bool>(c => c.City.Equals("London"))),
Result = londonCustomers
},
new WriteLine { Text = "Query executed - printing results" },
new WriteLine { },
// iterate through the list of customers and display in the console
new ForEach<Customer>
{
Values = londonCustomers,
Body = new ActivityAction<Customer>
{
Argument = iterationVariable,
Handler = new WriteLine { Text = new InArgument<String>(e => iterationVariable.Get(e).ContactName) }
}
}
}
}
};
}
private static Constraint ConfirmWithNoTarget()
{
DelegateInArgument<Confirm> element = new DelegateInArgument<Confirm> {
Name = "element"
};
DelegateInArgument<ValidationContext> argument = new DelegateInArgument<ValidationContext> {
Name = "validationContext"
};
Variable<bool> assertFlag = new Variable<bool> {
Name = "assertFlag"
};
Variable<IEnumerable<Activity>> elements = new Variable<IEnumerable<Activity>> {
Name = "elements"
};
Variable<int> index = new Variable<int> {
Name = "index"
};
Constraint<Confirm> constraint = new Constraint<Confirm>();
ActivityAction<Confirm, ValidationContext> action = new ActivityAction<Confirm, ValidationContext> {
Argument1 = element,
Argument2 = argument
};
Sequence sequence = new Sequence {
Variables = { assertFlag, elements, index }
};
If item = new If {
Condition = new InArgument<bool>(env => element.Get(env).Target != null)
};
Assign<bool> assign = new Assign<bool> {
To = assertFlag,
Value = 1
};
item.Then = assign;
Sequence sequence2 = new Sequence();
Assign<IEnumerable<Activity>> assign2 = new Assign<IEnumerable<Activity>> {
To = elements
};
GetParentChain chain = new GetParentChain {
ValidationContext = argument
};
assign2.Value = chain;
sequence2.Activities.Add(assign2);
While @while = new While(env => !assertFlag.Get(env) && (index.Get(env) < elements.Get(env).Count<Activity>()));
Sequence sequence3 = new Sequence();
If if2 = new If(env => elements.Get(env).ElementAt<Activity>(index.Get(env)).GetType() == typeof(CompensationParticipant));
Assign<bool> assign3 = new Assign<bool> {
To = assertFlag,
Value = 1
};
if2.Then = assign3;
sequence3.Activities.Add(if2);
Assign<int> assign4 = new Assign<int> {
To = index,
Value = new InArgument<int>(env => index.Get(env) + 1)
};
sequence3.Activities.Add(assign4);
@while.Body = sequence3;
sequence2.Activities.Add(@while);
item.Else = sequence2;
sequence.Activities.Add(item);
AssertValidation validation = new AssertValidation {
Assertion = new InArgument<bool>(assertFlag),
Message = new InArgument<string>(System.Activities.SR.ConfirmWithNoTargetConstraint)
};
sequence.Activities.Add(validation);
action.Handler = sequence;
constraint.Body = action;
return constraint;
}
// Retrieve all roles from the database. Uses an ActivityFunc<DataReader, Role> to map the results
// Performance decreases (since the mapping is done in multiple pulses) but mapping can be serialized
// to Xaml and authored declaratively in the the designer.
static void GetAllRolesUsingActivityFuncMapping()
{
DelegateInArgument<DbDataReader> reader = new DelegateInArgument<DbDataReader>() { Name = "readerInArgument" };
DelegateOutArgument<Role> roleOutArg = new DelegateOutArgument<Role>() { Name = "roleOutArgument" };
Activity dbQuery = new DbQuery<Role>()
{
ConfigName = "DbActivitiesSample",
Sql = "SELECT * FROM Roles",
MapperFunc = new ActivityFunc<System.Data.Common.DbDataReader,Role>
{
Argument = reader,
Handler = new Sequence
{
Activities =
{
new Assign<Role> { To = roleOutArg, Value = new InArgument<Role>(c => new Role()) },
new Assign<string>
{
To = new OutArgument<string>(c => roleOutArg.Get(c).Code),
Value = new InArgument<string>(c => reader.Get(c)["code"].ToString())
},
new Assign<string>
{
To = new OutArgument<string>(c => roleOutArg.Get(c).Name),
Value = new InArgument<string>(c => reader.Get(c)["name"].ToString())
}
}
},
Result = roleOutArg
}
};
IDictionary<string, object> results = WorkflowInvoker.Invoke(dbQuery);
IList<Role> roles = (IList<Role>)results["Result"];
foreach (Role role in roles)
{
Console.WriteLine(role.ToString());
}
}
private static Activity CreateWf()
{
// variables.
var pipeline = new DelegateInArgument<PSObject>() { Name = "Pipeline" };
var processName = new DelegateOutArgument<string>() { Name = "Process Name" };
var processes1 = new Variable<Collection<Process>> { Name = "Processes 1" };
var processes2 = new Variable<Collection<Process>> { Name = "Processes 2" };
var processes3 = new Variable<Collection<Process>> { Name = "Processes 3" };
var processNames = new Variable<Collection<string>> { Name = "Process Names" };
var errors = new Variable<Collection<ErrorRecord>> { Name = "Errors" };
var error = new DelegateInArgument<ErrorRecord> { Name = "Error" };
Sequence body = new Sequence()
{
Variables = { processes1, processes2, processes3, processNames, errors },
Activities =
{
// Simple PowerShell invocation.
new WriteLine()
{
Text = "Simple PowerShell invocation. Launching notepad."
},
new InvokePowerShell()
{
CommandText = "notepad"
},
new WriteLine(),
// Using PowerShell<T> to capture output.
new WriteLine()
{
Text = "Getting process and then pass the output to a Collection."
},
new InvokePowerShell<Process>()
{
CommandText = "Get-Process",
Output = processes1,
},
CreatePrintProcessActivity(processes1),
// Do some post-processing after invocation.
new WriteLine()
{
Text = "Getting the names of the processes."
},
new InvokePowerShell<string>()
{
CommandText = "Get-Process",
Output = processNames,
InitializationAction = new ActivityFunc<PSObject,string>
{
Argument = pipeline,
Result = processName,
Handler = new Assign<string>
{
To = processName,
Value = new LambdaValue<string>(ctx => ((Process) pipeline.Get(ctx).BaseObject).ToString())
}
},
},
new WriteLine()
{
Text = new InArgument<string>(ctx => "The first process returned is: " + processNames.Get(ctx)[0]),
},
new WriteLine(),
// Passing data using an input pipeline.
new WriteLine()
{
Text = "Passing data using an input pipeline and then extracting unique process names."
},
new InvokePowerShell<Process>()
{
CommandText = "Get-Unique",
Input = processes1,
Output = processes2,
},
CreatePrintProcessActivity(processes2),
// Passing in a parameter to the command.
new WriteLine()
{
Text = "Reverse sorting."
},
new InvokePowerShell<Process>()
{
CommandText = "Sort-Object",
Input = processes2,
Output = processes3,
Parameters =
{
{ "descending", new InArgument<Boolean>(true) }
}
},
CreatePrintProcessActivity(processes3),
// Run a command that results in errors.
new WriteLine()
{
Text = "Returning errors."
},
new InvokePowerShell<string>()
{
CommandText = "Write-Error",
Errors = errors,
Parameters =
{
{ "message", new InArgument<string>("a short error message") }
}
},
new ForEach<ErrorRecord>()
{
Values = errors,
Body = new ActivityAction<ErrorRecord>
{
Argument = error,
Handler = new WriteLine()
{
Text = new InArgument<string>(ctx => "Error returned: " + error.Get(ctx).ToString()),
},
}
}
}
};
return body;
}
// This sample shows how to use FindInCollection inside a workflow.
// In this case, we are combining CollectionActivities (AddToCollection activity)
// FindInCollection and ForEach.
static void UseFindInCollectionInWorkflow()
{
// create workflow variables
var employees = new Variable<IList<Employee>>();
var devsFromRedmond = new Variable<IList<Employee>>();
var iterationVariable = new DelegateInArgument<Employee>();
// create the Linq predicate for the find expression
Func<Employee, bool> predicate = e => e.Role == "DEV" && e.Location.Equals("Redmond");
// create workflow program
Activity sampleWorkflow = new Sequence
{
Variables = { employees, devsFromRedmond },
Activities =
{
new Assign<IList<Employee>>
{
To = employees,
Value = new LambdaValue<IList<Employee>>(c => new List<Employee>())
},
new AddToCollection<Employee>
{
Collection = new InArgument<ICollection<Employee>>(employees),
Item = new LambdaValue<Employee>(c => new Employee(1, "Employee 1", "DEV", "Redmond"))
},
new AddToCollection<Employee>
{
Collection = new InArgument<ICollection<Employee>>(employees),
Item = new LambdaValue<Employee>(c => new Employee(2, "Employee 2", "DEV", "Redmond"))
},
new AddToCollection<Employee>
{
Collection = new InArgument<ICollection<Employee>>(employees),
Item = new LambdaValue<Employee>(c => new Employee(3, "Employee 3", "PM", "Redmond"))
},
new AddToCollection<Employee>
{
Collection = new InArgument<ICollection<Employee>>(employees),
Item = new LambdaValue<Employee>(c => new Employee(4, "Employee 4", "PM", "China"))
},
new FindInCollection<Employee>
{
Collections = new InArgument<IEnumerable<Employee>>(employees),
Predicate = new LambdaValue<Func<Employee, bool>>(c => predicate),
Result = new OutArgument<IList<Employee>>(devsFromRedmond)
},
new ForEach<Employee>
{
Values = new InArgument<IEnumerable<Employee>>(devsFromRedmond),
Body = new ActivityAction<Employee>
{
Argument = iterationVariable,
Handler = new WriteLine
{
Text = new InArgument<string>(env => iterationVariable.Get(env).ToString())
}
}
}
}
};
// execute workflow
WorkflowInvoker.Invoke(sampleWorkflow);
}
