Durable Functions for workflows in Azure - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to start a Durable Function orchestration.

Azure

client = df.DurableOrchestrationClient(context)
instance_id = await client.[1]("MyOrchestrator", input_data)

Drag options to blanks, or click blank then click option'

Astart_new

Binvoke

Crun

Dexecute

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'run' instead of 'start_new' which does not start orchestration.

Confusing 'invoke' or 'execute' as valid methods.

The start_new method starts a new orchestration instance in Durable Functions.

2fill in blank

medium

Complete the code to define an activity function in Durable Functions.

Azure

@df.activity_trigger
async def [1](name: str) -> str:
    return f"Hello, {name}!"

Drag options to blanks, or click blank then click option'

Amain

Borchestrator_function

Cgreeting_activity

Drun_activity

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'orchestrator_function' which is reserved for orchestrator functions.

Using generic names like 'main' that do not describe activity.

The function name for an activity can be any valid name, but here greeting_activity clearly indicates an activity function.

3fill in blank

hard

Fix the error in the orchestrator function to call an activity function.

Azure

def orchestrator_function(context: df.DurableOrchestrationContext):
    result = yield context.[1]("greeting_activity", "Azure")
    return result

Drag options to blanks, or click blank then click option'

Astart_activity

Bcall_activity_async

Ccall_sub_orchestrator

Dcall_activity

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'call_activity_async' which is not a valid method.

Using 'start_activity' which does not exist.

The correct method to call an activity function inside an orchestrator is call_activity.

4fill in blank

hard

Fill both blanks to correctly wait for an orchestration to complete and get its status.

Azure

status = await client.[1](instance_id)
result = await client.[2](instance_id)

Drag options to blanks, or click blank then click option'

Await_for_completion

Bget_status

Cget_result

Dstart_new

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'start_new' instead of waiting or getting status.

Confusing 'get_result' with 'get_status'.

The method wait_for_completion waits for orchestration completion, and get_status retrieves the current status.

5fill in blank

hard

Fill all three blanks to correctly define an orchestrator function that calls two activities sequentially.

Azure

def [1](context: df.DurableOrchestrationContext):
    result1 = yield context.[2]("activity_one", None)
    result2 = yield context.[3]("activity_two", result1)
    return result2

Drag options to blanks, or click blank then click option'

Aorchestrator_function

Bcall_activity

Dmain_function

Attempts:

3 left

💡 Hint

Common Mistakes

Using different method names for activity calls.

Naming the orchestrator function incorrectly.

The orchestrator function is named orchestrator_function. It calls activities using call_activity method for both calls.