timeout pattern

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Pragya Keshap answered on February 3, 2023 Popularity 3/10 Helpfulness 1/10

answer timeout pattern

timeout pattern

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▪ Timeout Pattern provides that should not wait for a service

response for an indefinite amount of time, throw an exception

instead of waiting too long.

▪ It is used to handle scenarios where a service call takes longer

than expected to complete.

▪ Setting a maximum time limit for the service call to complete, if

the time limit is exceeded, the call is considered to have «timed

out.»

▪ In microservices, It used to prevent service calls from taking

too long to complete.

▪ If the payment processing service takes longer than expected

to complete a request, the timeout pattern used to cancel the

request and return an error to the shopping cart service

@Service
public class RatingServiceClient {

    private final RestTemplate restTemplate = new RestTemplate();

    @Value("${rating.service.endpoint}")
    private String ratingService;

    @TimeLimiter(name = "ratingService", fallbackMethod = "getDefault")
    public CompletionStage<ProductRatingDto> getProductRatingDto(int productId){
        Supplier<ProductRatingDto> supplier = () ->
            this.restTemplate.getForEntity(this.ratingService + productId, ProductRatingDto.class)
                    .getBody();
        return CompletableFuture.supplyAsync(supplier);
    }

    private CompletionStage<ProductRatingDto> getDefault(int productId, Throwable throwable){
        return CompletableFuture.supplyAsync(() -> ProductRatingDto.of(0, Collections.emptyList()));
    }

}

https://www.vinsguru.com/timeout-pattern/

Popularity 3/10 Helpfulness 1/10 Language java

Source: Grepper

Tags: java timeout

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Contributed on Feb 03 2023

Pragya Keshap

0 Answers Avg Quality 2/10

timeout pattern

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