Spring @Retryable - 如何在调用时记录? [英] Spring @Retryable - how to log when it is invoked?
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问题描述
我使用 compile 'org.springframework.retry:spring-retry:1.2.2.RELEASE'
和 Spring Boot 1.5.9.RELEASE
.
配置为重试我的方法,效果很好:
Configured to retry my method and it works well:
@Retryable(value = { IOException.class }, maxAttempts = 5, backoff = @Backoff(delay = 500))
public void someMethod(){...}
重试时如何输出一些特定的消息?
How to output some specific message when retry occurs?
推荐答案
您可以注册一个RetryListener
:
@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"));
}
});
如果您不需要从所有 3 个拦截点登录,您可以改写 RetryListenerSupport
.例如:
If you don't need to log from all 3 interception points, you can override RetryListenerSupport
instead. For example:
@Bean
public List<RetryListener> retryListeners() {
Logger log = LoggerFactory.getLogger(getClass());
return Collections.singletonList(new RetryListenerSupport() {
@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());
}
});
}
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