Camel Hystrix EIP - IgnoreExceptions 以防止调用 Fallback

Posted 2023-03-16

【中文标题】Camel Hystrix EIP - IgnoreExceptions 以防止调用 Fallback

【英文标题】：Camel Hystrix EIP - IgnoreExceptions to prevent call to Fallback

【发布时间】：2019-06-06 16:17:39

【问题描述】：

在 Apache camel Hystrix EIP 中，我们如何防止对 bad request 异常的 fallback 方法的调用。我尝试从我的请求调度程序处理器中抛出“HystrixBadRequestException”，但我仍然看到触发了回退。有没有办法解决这个问题？

 /* in route builder class */
public void configure() throws Exception 
    .hystrix()
        .hystrixConfiguration()
        .circuitBreakerEnabled(circuitBreakerConfig.isEnabled())
        .executionTimeoutInMilliseconds(circuitBreakerConfig.getConnectionTimeoutInMilliseconds())
        .circuitBreakerErrorThresholdPercentage(circuitBreakerConfig.getErrorThresholdPercentage())
        .circuitBreakerSleepWindowInMilliseconds(circuitBreakerConfig.getSleepWindowInMilliseconds())
        .circuitBreakerRequestVolumeThreshold(circuitBreakerConfig.getRequestVolumeThreshold())
        .metricsRollingStatisticalWindowInMilliseconds(circuitBreakerConfig.getRollingPercentileWindowInMilliseconds())
        .end()
            .to("requestDispatcher")
        .onFallback()
            .log(LoggingLevel.INFO, "Fallback:")
            .bean("responsehandler", "getFallbackResponse")
            .stop()
        .end()

    /* in dispatcher class */
private Exchange dispatchRequest(Exchange exchange) 
    if (exception instanceof HttpOperationFailedException) 
        Integer statusCode = ((HttpOperationFailedException) exception).getStatusCode();
        if(statusCode == 400) 
            throw new HystrixBadRequestException("Hystrix bad request");
        
    

【参考方案1】：

这目前没有在 camel-hystrix 中实现。我已经记录了一张票，以便在即将发布的版本中添加它：https://issues.apache.org/jira/browse/CAMEL-13066