Package io.vrap.rmf.base.client.http

Class PolicyBuilder

java.lang.Object
io.vrap.rmf.base.client.http.PolicyBuilder
public class PolicyBuilder extends Object

PolicyBuilder

The PolicyBuilder allows the combination of different policies for failing requests.

In case you need different policies based on the request use the RequestPolicyBuilder instead

The order of policies matters. For example applying a timeout before withRetry(RetryPolicyBuilder) retry} will time out across all requests whereas applying a timeout after the retry count against every single request even the retried ones.

Retry

Retrying on HTTP status codes

final ApiHttpClient build = ClientBuilder.of()
        // ...
        .withPolicies(policyBuilder -> policyBuilder.withRetry(retry -> retry.maxRetries(3)
                .statusCodes(Arrays.asList(HttpStatusCode.SERVICE_UNAVAILABLE_503,
                    HttpStatusCode.INTERNAL_SERVER_ERROR_500))))
        .build();

See the test code.

Retrying specific exceptions

final ApiHttpClient build = ClientBuilder.of()
        // ...
        .withPolicies(policyBuilder -> policyBuilder
                .withRetry(retry -> retry.maxRetries(3).failures(singletonList(JsonException.class))))
        .build();

See the test code.

Timeout

final ApiHttpClient build = ClientBuilder.of()
        // ...
        .withPolicies(
            policyBuilder -> policyBuilder.withTimeout(Duration.ofSeconds(10), TimeoutBuilder::withInterrupt))
        .build();

See the test code.

Bulkhead

Implementation of a Queue to limit the number of concurrent requests handled by the client

final ApiHttpClient build = ClientBuilder.of()
        // ...
        .withPolicies(policyBuilder -> policyBuilder.withBulkhead(64, Duration.ofSeconds(10)))
        .build();

See the test code.