Exception handling in async in Spring Boot - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to annotate a method for asynchronous execution.

Spring Boot

@[1]
public void processAsync() {
    // async logic
}

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

AAsyncTask

BAsync

CAsyncExecution

DAsyncMethod

Attempts:

3 left

💡 Hint

Common Mistakes

Using a non-existent annotation like @AsyncMethod

Forgetting the @ symbol before the annotation

The @Async annotation marks a method to run asynchronously in Spring Boot.

2fill in blank

medium

Complete the code to return a Future object from an async method.

Spring Boot

@Async
public [1]<String> fetchData() {
    return new AsyncResult<>("data");
}

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ACompletableFuture

BListenableFuture

CFuture

DDeferredResult

Attempts:

3 left

💡 Hint

Common Mistakes

Using CompletableFuture without proper async support

Returning void instead of a Future type

The method returns a Future object to represent the result of an async computation.

3fill in blank

hard

Fix the error in the async exception handler method signature.

Spring Boot

public void handleError([1] ex) {
    // handle exception
}

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AThrowable

BException

CRuntimeException

DError

Attempts:

3 left

💡 Hint

Common Mistakes

Using Exception only misses Errors

Using Error only misses Exceptions

Using Throwable allows catching all errors and exceptions in async handlers.

4fill in blank

hard

Fill both blanks to correctly define an async exception handler method.

Spring Boot

public void [1]([2] ex) {
    // log or handle exception
}

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AhandleAsyncException

BhandleError

CThrowable

DException

Attempts:

3 left

💡 Hint

Common Mistakes

Using Exception as parameter misses Errors

Using unrelated method names

The method name can be handleError and it should accept a Throwable parameter to catch all async exceptions.

5fill in blank

hard

Fill all three blanks to create a complete async method with exception handling.

Spring Boot

@Async
public [1]<String> [2]() {
    try {
        // async logic
        return new AsyncResult<>("success");
    } catch ([3] ex) {
        // handle exception
        return new AsyncResult<>("failure");
    }
}

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

AFuture

BfetchDataAsync

CException

DCompletableFuture

Attempts:

3 left

💡 Hint

Common Mistakes

Using CompletableFuture without proper async support

Catching Throwable instead of Exception in try-catch

Using generic method names that don't indicate async

The method returns a Future, is named fetchDataAsync, and catches Exception to handle errors.