想问一个关于webflux和resilience4j重试的基本问题。我们正在使用 Webflux 和 Resilience4J(不是 Spring Cloud Circuit Breaker)运行 Java SpringBoot。在运行应用程序时出现错误(不知何故完整的堆栈跟踪不适合我):
due to exception [reactor.core.publisher.Mono.retryWhen(Ljava/util/function/Function;)Lreactor/core/publisher/Mono;]
构建 Retry bean 的代码如下(我们没有使用基于 YAML 的配置):
@Bean
public Retry retryConfig(ResilienceCCMConfig resilienceCCMConfig) {
RetryConfig config = RetryConfig.custom().maxAttempts(5)
.waitDuration(Duration.of(1, SECONDS))
.retryExceptions(ServerException.class)
.ignoreExceptions(ClientException.class)
.build();
return RetryRegistry.of(config).retry("retry-config", config);
}
现在我们使用从上面注入的 bean 调用我们的 Web 客户端的 POST 方法,如下所示:
@Autowired
private Retry retryConfig;
return webClient.post().uri(url)
.headers(httpHeaders -> getItemHeaders(httpHeaders, tenantId, bannerId, correlationId))
.body(itemServiceRequestMono, ItemServiceRequest.class)
.retrieve()
.onStatus(HttpStatus::isError, clientResponse -> {
LOGGER.error("Error");
if (clientResponse.statusCode().is5xxClientError()) {
throw new Exception("Something went wrong ");
}
return Mono.empty();
})
.bodyToMono(MyResponse.class)
.transform(RetryOperator.of(retryConfig))
.onErrorResume(ex -> myFallbackMethod(ex));
POM 依赖:
<dependency>
<groupId>io.projectreactor</groupId>
<artifactId>reactor-core</artifactId>
<version>3.4.3</version>
</dependency>
<dependency>
<groupId>io.github.resilience4j</groupId>
<artifactId>resilience4j-reactor</artifactId>
<version>1.6.1</version>
</dependency>
<dependency>
<groupId> io.github.resilience4j</groupId>
<artifactId>resilience4j-spring-boot2</artifactId>
<version>1.6.1</version>
</dependency>
请帮忙 。