Question

我将compile 'org.springframework.retry:spring-retry:1.2.2.RELEASE'与Spring Boot 1.5.9.RELEASE一起使用。

配置为重试我的方法，效果很好：

@Retryable(value = { IOException.class }, maxAttempts = 5, backoff = @Backoff(delay = 500))
public void someMethod(){...}

重试时如何输出某些特定消息？

Answer 1

您可以注册for-yield：

RetryListener

如果您不需要从所有3个拦截点登录，则可以覆盖@Bean public List<RetryListener> retryListeners() { Logger log = LoggerFactory.getLogger(getClass()); return Collections.singletonList(new RetryListener() { @Override public <T, E extends Throwable> boolean open(RetryContext context, RetryCallback<T, E> callback) { // The 'context.name' attribute has not been set on the context yet. So we have to use reflection. Field labelField = ReflectionUtils.findField(callback.getClass(), "val$label"); ReflectionUtils.makeAccessible(labelField); String label = (String) ReflectionUtils.getField(labelField, callback); log.trace("Starting retryable method {}", label); return true; } @Override public <T, E extends Throwable> void onError(RetryContext context, RetryCallback<T, E> callback, Throwable throwable) { log.warn("Retryable method {} threw {}th exception {}", context.getAttribute("context.name"), context.getRetryCount(), throwable.toString()); } @Override public <T, E extends Throwable> void close(RetryContext context, RetryCallback<T, E> callback, Throwable throwable) { log.trace("Finished retryable method {}", context.getAttribute("context.name")); } });。例如：

RetryListenerSupport

Answer 2

查看代码，org.springframework.retry.support.RetryTemplate执行重试逻辑以重试操作。此模板仅记录以下简单内容：

o.s.retry.support.RetryTemplate          : Retry: count=0
o.s.retry.support.RetryTemplate          : Checking for rethrow: count=1
o.s.retry.support.RetryTemplate          : Retry: count=1
o.s.retry.support.RetryTemplate          : Checking for rethrow: count=2
o.s.retry.support.RetryTemplate          : Retry: count=2
o.s.retry.support.RetryTemplate          : Checking for rethrow: count=3
o.s.retry.support.RetryTemplate          : Retry failed last attempt: count=3

如果要记录特定的异常，可以捕获异常日志并重新抛出。不幸的是，据我所知，没有办法在框架内记录自定义消息。

另一种方法是遮蔽负责调用方法的实际拦截器，如RetryOperationsInterceptor，但不建议这样做。

Spring @Retryable - 如何在调用时记录？

2 个答案: