# Retry-After 를 초로 바꾸는 자리 — 파싱 구문으로 전수 검색
RabbitBrokerIT.java:116:                Long.parseLong(returned.getProperties().getHeaders().get("x-seq").toString())));
KafkaDeliveryMapper.java:148:      return Integer.parseInt(required(headers, name));
KafkaRetryMetadataMapper.java:75:      int attempt = Integer.parseInt(value.orElseThrow().value());
Draft12UploadController.java:159:      long value = Long.parseLong(header.trim());
NormalizedForwardedHeaders.java:138:      int port = Integer.parseInt(value);
WebThrottleHttpContract.java:49:    assertThat(Integer.parseInt(fixture().exhaustAndCall().retryAfter())).isGreaterThanOrEqualTo(1);
BlockingAttemptExecutor.java:238:      return Optional.of(Duration.ofSeconds(Long.parseLong(header.get().trim())));
LettuceRedisAdminOperations.java:145:              Duration.ofSeconds(Long.parseLong(attributes.getOrDefault("age", "0"))),
LettuceRedisAdminOperations.java:146:              Duration.ofSeconds(Long.parseLong(attributes.getOrDefault("idle", "0"))),
ProviderResults.java:94:            return Optional.of(Duration.ofSeconds(Long.parseLong(value.trim())));
FcmFailureClassifier.java:70:            return Optional.of(Duration.ofSeconds(Long.parseLong(value.trim())));
WebhookNotificationProviderAdapter.java:243:                long seconds = Long.parseLong(value.trim());

# 그 네 자리 안에서 부호를 보는 줄
WebhookNotificationProviderAdapter.java:244:                return seconds > 0 ? Optional.of(Duration.ofSeconds(seconds)) : Optional.empty();

# 받는 쪽 검사 — ProviderFailure 정규 생성자
27:      throw new IllegalArgumentException("code");
31:          if (delay.isNegative()) {
32:            throw new IllegalArgumentException("retryAfter");

# 공용 파서를 쓰는 자리
SesFailureClassifier.java:37:          ProviderResults.retryAfter(response.header("retry-after")),
SesFailureClassifier.java:49:        response.statusCode(), ProviderResults.retryAfter(response.header("retry-after")));
WebPushFailureClassifier.java:39:        status, ProviderResults.retryAfter(response.header("retry-after")));
TwilioFailureClassifier.java:35:          ProviderResults.retryAfter(response.header("retry-after")),
TwilioFailureClassifier.java:39:        response.statusCode(), ProviderResults.retryAfter(response.header("retry-after")));

# FcmFailureClassifier 가 나오는 자리 전부
FcmBatchAdapterTest.java:122:    var classifier = new FcmFailureClassifier();
FcmBatchAdapterTest.java:134:    var classifier = new FcmFailureClassifier();
FcmBatchAdapterTest.java:154:        new FcmFailureClassifier(),
FcmFailureClassifier.java:16:public final class FcmFailureClassifier {
FcmBatchCoordinator.java:32:  private final FcmFailureClassifier classifier;
FcmBatchCoordinator.java:40:      FcmFailureClassifier classifier,
FcmContactPointUpdater.java:19:  private final FcmFailureClassifier classifier;
FcmContactPointUpdater.java:22:      ContactPointStorePort contactPoints, FcmFailureClassifier classifier) {

# 알림 리프의 시험이 넣는 헤더 값
TwilioSmsProviderAdapterTest.java:94:    harness.respondWith(429, "{\"code\":20429}", Map.of("retry-after", "10"));
ProviderAdapterContract.java:79:        .respondWith(429, "{\"reason\":\"TooManyRequests\"}", java.util.Map.of("retry-after", "7"));
NotificationChaosSecurityTest.java:120:                429, "{\"reason\":\"TooManyRequests\"}", Map.of("retry-after", "3")),
CrossProviderContractSuiteTest.java:77:      harness.respondWith(429, "{\"reason\":\"TooManyRequests\"}", Map.of("retry-after", "7"));

# 이 헤더를 만드는 다른 자리
WebMvcThrottleFilter.java:133:    response.setHeader("Retry-After", retryAfter);
MockHttpServer.java:99:    server.enqueue(new MockResponse().setResponseCode(status).setHeader("Retry-After", retryAfter));
StatefulUpstream.java:62:                    .setHeader("Retry-After", retryAfterSeconds)