/*
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* Copyright (c) 2018-2028, DreamLu All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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* Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* Neither the name of the dreamlu.net developer nor the names of its
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* contributors may be used to endorse or promote products derived from
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* this software without specific prior written permission.
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* Author: DreamLu 卢春梦 (596392912@qq.com)
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*/
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package org.springblade.core.redis.ratelimiter;
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import org.springblade.core.tool.function.CheckedSupplier;
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import org.springblade.core.tool.utils.Exceptions;
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import java.util.concurrent.TimeUnit;
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/**
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* RateLimiter 限流 Client
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*
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* @author L.cm
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*/
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public interface RateLimiterClient {
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/**
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* 服务是否被限流
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*
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* @param key 自定义的key,请保证唯一
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* @param max 支持的最大请求
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* @param ttl 时间,单位默认为秒(seconds)
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* @return 是否允许
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*/
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default boolean isAllowed(String key, long max, long ttl) {
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return this.isAllowed(key, max, ttl, TimeUnit.SECONDS);
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}
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/**
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* 服务是否被限流
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*
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* @param key 自定义的key,请保证唯一
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* @param max 支持的最大请求
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* @param ttl 时间
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* @param timeUnit 时间单位
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* @return 是否允许
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*/
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boolean isAllowed(String key, long max, long ttl, TimeUnit timeUnit);
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/**
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* 服务限流,被限制时抛出 RateLimiterException 异常,需要自行处理异常
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*
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* @param key 自定义的key,请保证唯一
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* @param max 支持的最大请求
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* @param ttl 时间
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* @param supplier Supplier 函数式
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* @return 函数执行结果
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*/
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default <T> T allow(String key, long max, long ttl, CheckedSupplier<T> supplier) {
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return allow(key, max, ttl, TimeUnit.SECONDS, supplier);
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}
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/**
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* 服务限流,被限制时抛出 RateLimiterException 异常,需要自行处理异常
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*
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* @param key 自定义的key,请保证唯一
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* @param max 支持的最大请求
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* @param ttl 时间
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* @param timeUnit 时间单位
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* @param supplier Supplier 函数式
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* @param <T>
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* @return 函数执行结果
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*/
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default <T> T allow(String key, long max, long ttl, TimeUnit timeUnit, CheckedSupplier<T> supplier) {
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boolean isAllowed = this.isAllowed(key, max, ttl, timeUnit);
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if (isAllowed) {
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try {
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return supplier.get();
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} catch (Throwable e) {
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throw Exceptions.unchecked(e);
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}
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}
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throw new RateLimiterException(key, max, ttl, timeUnit);
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}
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}
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