[英]How to configure delay time in Spring-retry (Spring Boot)
是否可以配置@Retryable
? 這個方法(getCurrentRate)將被調用3次。 首先是5分鍾,然后是10分鍾,最后是15分鍾。 我該如何配置?
@Retryable(maxAttempts=3,value=RuntimeException.class,backoff = @Backoff(delay = 1000))
例
public class RealExchangeRateCalculator implements ExchangeRateCalculator {
private static final double BASE_EXCHANGE_RATE = 1.09;
private int attempts = 0;
private SimpleDateFormat sdf = new SimpleDateFormat("HH:mm:ss");
@Retryable(maxAttempts=3,value=RuntimeException.class,backoff = @Backoff(delay = 1000))
public Double getCurrentRate() {
System.out.println("Calculating - Attempt " + attempts + " at " + sdf.format(new Date()));
attempts++;
try {
HttpResponse<JsonNode> response = Unirest.get("http://rate-exchange.herokuapp.com/fetchRate")
.queryString("from", "EUR")
.queryString("to","USD")
.asJson();
switch (response.getStatus()) {
case 200:
return response.getBody().getObject().getDouble("Rate");
case 503:
throw new RuntimeException("Server Response: " + response.getStatus());
default:
throw new IllegalStateException("Server not ready");
}
} catch (UnirestException e) {
throw new RuntimeException(e);
}
}
@Recover
public Double recover(RuntimeException e){
System.out.println("Recovering - returning safe value");
return BASE_EXCHANGE_RATE;
}
}
您可以使用此配置實現此目的:
@Retryable(
maxAttempts=3,
value=RuntimeException.class,
backoff = @Backoff(
delay = 300000,
multiplier = 2,
maxDelay = 900000
)
)
調用次數:
Delay = 300000
Delay = 300000 * 2 = 600000
Delay = 600000 * 2 = 1200000 with Max Delay of 900000
@Sivakumar Neelam Veera
您可以使用RetryTemplate類表示重試邏輯。 在那里,您可以注入依賴項並以編程方式使用它們。
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