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IJPay 让支付触手可及(Easy Pay Library)-核心工具包

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package com.ijpay.core.utils;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

/**
 * IJPay 让支付触手可及，封装了微信支付、支付宝支付、银联支付常用的支付方式以及各种常用的接口。
 *
 * 不依赖任何第三方 mvc 框架，仅仅作为工具使用简单快速完成支付模块的开发，可轻松嵌入到任何系统里。 
 *
 * IJPay 交流群: 723992875、864988890
 *
 * Node.js 版: https://gitee.com/javen205/TNWX
 *
 * 异常重试工具 by L.cm
 *
 * @author Javen
 */
public class RetryUtils {
	private static final Logger log = LoggerFactory.getLogger(RetryUtils.class);

	/**
	 * 回调结果检查
	 */
	public interface ResultCheck {
		/**
		 * 是否匹配
		 *
		 * @return 匹配结果
		 */
		boolean matching();

		/**
		 * 获取 JSON
		 *
		 * @return json
		 */
		String getJson();
	}

	/**
	 * 在遇到异常时尝试重试
	 *
	 * @param retryLimit    重试次数
	 * @param retryCallable 重试回调
	 * @param            泛型
	 * @return V 结果
	 */
	public static  V retryOnException(int retryLimit,
															 java.util.concurrent.Callable retryCallable) {
		V v = null;
		for (int i = 0; i < retryLimit; i++) {
			try {
				v = retryCallable.call();
			} catch (Exception e) {
				log.warn("retry on " + (i + 1) + " times v = " + (v == null ? null : v.getJson()), e);
			}
			if (null != v && v.matching()) break;
			log.error("retry on " + (i + 1) + " times but not matching v = " + (v == null ? null : v.getJson()));
		}
		return v;
	}

	/**
	 * 在遇到异常时尝试重试
	 *
	 * @param retryLimit    重试次数
	 * @param sleepMillis   每次重试之后休眠的时间
	 * @param retryCallable 重试回调
	 * @param            泛型
	 * @return V 结果
	 * @throws java.lang.InterruptedException 线程异常
	 */
	public static  V retryOnException(int retryLimit, long sleepMillis,
															 java.util.concurrent.Callable retryCallable) throws java.lang.InterruptedException {
		V v = null;
		for (int i = 0; i < retryLimit; i++) {
			try {
				v = retryCallable.call();
			} catch (Exception e) {
				log.warn("retry on " + (i + 1) + " times v = " + (v == null ? null : v.getJson()), e);
			}
			if (null != v && v.matching()) {
				break;
			}
			log.error("retry on " + (i + 1) + " times but not matching v = " + (v == null ? null : v.getJson()));
			if (sleepMillis > 0) {
				Thread.sleep(sleepMillis);
			}
		}
		return v;
	}
}