Bulkhead pattern in Microservices - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to define a bulkhead with a fixed number of concurrent calls.

Microservices

bulkhead = Bulkhead(max_concurrent_calls=[1])

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

A0

B10

C100

D-1

Attempts:

3 left

💡 Hint

Common Mistakes

Setting max_concurrent_calls to 0 disables all calls.

Using negative numbers causes configuration errors.

The bulkhead limits concurrent calls to 10 to isolate failures and control resource usage.

2fill in blank

medium

Complete the code to wrap a service call with a bulkhead to isolate failures.

Microservices

result = bulkhead.[1](service_call)

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

Aexecute

Binvoke

Crun

Dcall

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'call' or 'run' which may not exist in the bulkhead API.

Forgetting to wrap the service call causing no isolation.

The 'execute' method runs the service call within the bulkhead's limits.

3fill in blank

hard

Fix the error in the bulkhead configuration to prevent unlimited concurrent calls.

Microservices

bulkhead = Bulkhead(max_concurrent_calls=[1])

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

A5

BNone

C0

D-5

Attempts:

3 left

💡 Hint

Common Mistakes

Using 0 or None disables the bulkhead limit.

Negative numbers cause configuration errors.

Setting max_concurrent_calls to 5 limits concurrency and prevents resource exhaustion.

4fill in blank

hard

Fill both blanks to create two bulkheads isolating different services.

Microservices

payment_bulkhead = Bulkhead(max_concurrent_calls=[1])
order_bulkhead = Bulkhead(max_concurrent_calls=[2])

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

A10

B20

C5

D0

Attempts:

3 left

💡 Hint

Common Mistakes

Setting zero disables the bulkhead effect.

Using the same limit for both services reduces isolation benefits.

Payment service is limited to 10 concurrent calls, order service to 20, isolating their failures.

5fill in blank

hard

Fill all three blanks to implement bulkhead isolation with fallback handling.

Microservices

try:
    response = bulkhead.[1](external_service_call)
except [2]:
    response = [3]()

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

Aexecute

BBulkheadFullException

Cfallback_response

Dcall

Attempts:

3 left

💡 Hint

Common Mistakes

Not catching the correct exception causes crashes.

Not providing a fallback leads to poor user experience.

Use 'execute' to run the call, catch 'BulkheadFullException' when bulkhead is full, and return a fallback response.