在单独的Java类中使用策略执行重试模板

Question

我正在使用Spring Boot应用程序，并且正在使用Rest Templates集成某些失败的HTTP连接的重试。我已经集成了其余模板并为其配置了超时，现在我集中精力执行具有自定义重试策略的重试模板，但是遇到了一些问题。我拥有的自定义重试策略位于单独的类中，但是我试图将其集成到创建重试模板的同一类中。我在下面包含了用于创建重试模板的代码，单独的自定义重试策略类，还尝试将自定义重试策略与重试模板代码集成在一起。自定义重试策略设置为在应用程序获取HTML代码404时触发重试。

公共类HttpFailedConnectionRetryPolicy扩展了ExceptionClassifierRetryPolicy {

public HttpFailedConnectionRetryPolicy(Integer maxAttempts) {
    final NeverRetryPolicy doNotRetry = new NeverRetryPolicy();
    final SimpleRetryPolicy simpleRetryPolicy = new SimpleRetryPolicy();
    simpleRetryPolicy.setMaxAttempts(maxAttempts);

    this.setExceptionClassifier(new Classifier<Throwable, RetryPolicy>() {
        @Override
        public RetryPolicy classify(Throwable throwable) {
            if (throwable instanceof HttpClientErrorException.NotFound) {
                return doNotRetry;
            }
            return simpleRetryPolicy;
        }
    });
}

}

公共RetryTemplate retryTemplate（）抛出Throwable {         RetryTemplate retryTemplate = new RetryTemplate（）;

    FixedBackOffPolicy backOffPolicy = new FixedBackOffPolicy();
    backOffPolicy.setBackOffPeriod((long) maxBackOffPeriod);
    retryTemplate.setBackOffPolicy(backOffPolicy);

    NeverRetryPolicy doNotRetry = new NeverRetryPolicy();
    SimpleRetryPolicy retryPolicy = new SimpleRetryPolicy();
    retryPolicy.setMaxAttempts(maxAttempts);
    retryTemplate.setRetryPolicy(retryPolicy);

    return retryTemplate.execute(new RetryCallback<RetryTemplate, Throwable>() {
        @Override
        public RetryTemplate doWithRetry(RetryContext retryContext) throws Throwable {
            class HttpFailedConnectionRetryPolicy extends ExceptionClassifierRetryPolicy {
                public HttpFailedConnectionRetryPolicy() {
                    this.setExceptionClassifier(new Classifier<Throwable, RetryPolicy>() {
                        @Override
                        public RetryPolicy classify(Throwable throwable) {
                            if (throwable instanceof HttpClientErrorException.NotFound) {
                                return doNotRetry;
                            }
                            return retryPolicy;
                        }
                    });
                }
            }
        }

        class HttpFailedConnectionRetryPolicy extends ExceptionClassifierRetryPolicy {
            public HttpFailedConnectionRetryPolicy() {
                this.setExceptionClassifier(new Classifier<Throwable, RetryPolicy>() {
                    @Override
                    public RetryPolicy classify(Throwable throwable) {
                        if (throwable instanceof HttpClientErrorException.NotFound) {
                            return doNotRetry;
                        }
                        return retryPolicy;
                    }
                });
            }
        }
    });
}