如何成倍增加重試間隔春季RequestHandlerRetryAdvice

Question

重試規定如下：

<bean id="retryAdvice" 
    class="org.springframework.integration.handler.advice.RequestHandlerRetryAdvice" > 
    <property name="retryTemplate"> 
      <bean class="org.springframework.retry.support.RetryTemplate"> 
      <property name="backOffPolicy"> 
        <bean class="org.springframework.retry.backoff.ExponentialBackOffPolicy"> 
        <property name="initialInterval" value="5000"/> 
        <property name="multiplier" value="3.0"/> 
        </bean> 
      </property> 
      <property name="retryPolicy"> 
        <bean class="org.springframework.retry.policy.SimpleRetryPolicy"> 
        <property name="maxAttempts" value="6" /> 
        </bean> 
      </property> 
      </bean> 
    </property> 
</bean> 

我預計的時間間隔將與千方百計增加3倍。實際上，我得到了以下時間間隔： 5,15,30,30,30秒。請參閱下面的確切時間和間隔。 我錯誤地指定了什麼？

2016-05-10 10:07:49,714 - 0 
2016-05-10 10:07:55,085 - 5.2 
2016-05-10 10:08:10,457 - 15.4 
2016-05-10 10:08:40,830 - 30.4 
2016-05-10 10:09:11,230 - 30.4 
2016-05-10 10:09:41,639 - 30.4 

Answer 1

有考慮：

/** 
* Setter for maximum back off period. Default is 30000 (30 seconds). the 
* value will be reset to 1 if this method is called with a value less than 
* 1. Set this to avoid infinite waits if backing off a large number of 
* times (or if the multiplier is set too high). 
* 
* @param maxInterval in milliseconds. 
*/ 
public void setMaxInterval(long maxInterval) { 
    this.maxInterval = maxInterval > 0 ? maxInterval : 1; 
} 

所以，當您ExponentialBackOffPolicy達到30 secs（默認）停止使用multiplier之後。

Answer 2

增加最大間隔以使乘數生效。

<bean id="retryTemplate"  class="org.springframework.retry.support.RetryTemplate"> 
     <property name="retryPolicy"> 
      <bean class="RetryPolicy" 
      p:skipRetryFaults="${retry.skipForFaults}" 
      p:maxAttempts="${retry.maxAttempts}"/> 
     </property> 
     <property name="backOffPolicy"> 
      <bean class="org.springframework.retry.backoff.ExponentialBackOffPolicy"> 
       <property name="initialInterval" value="${backoff.initialInterval}" /> 
       <property name="maxInterval" value="${backoff.maxInterval}" /> 
       <property name="multiplier" value="${backoff.multiplier}" /> 
      </bean> 
     </property> 
    </bean>