{"id":201630,"date":"2025-05-10T09:28:15","date_gmt":"2025-05-10T01:28:15","guid":{"rendered":"https:\/\/server.hk\/cnblog\/201630\/"},"modified":"2025-05-10T09:28:15","modified_gmt":"2025-05-10T01:28:15","slug":"redis%e5%88%86%e5%b8%83%e5%bc%8f%e9%94%81%e5%ae%9e%e4%be%8b%e5%88%86%e6%9e%90%e8%ae%b2%e8%a7%a3","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/201630\/","title":{"rendered":"Redis\u5206\u5e03\u5f0f\u9501\u5b9e\u4f8b\u5206\u6790\u8bb2\u89e3"},"content":{"rendered":"

<\/b> <\/p>\n

Redis\u5206\u5e03\u5f0f\u9501\u5b9e\u4f8b\u5206\u6790\u8bb2\u89e3<\/h1>\n

<\/i>\u6536\u85cf<\/span> <\/p>\n

\u5b66\u4e60\u77e5\u8bc6\u8981\u5584\u4e8e\u601d\u8003\uff0c\u601d\u8003\uff0c\u518d\u601d\u8003\uff01\u4eca\u5929golang\u5b66\u4e60\u7f51\u5c0f\u7f16\u5c31\u7ed9\u5927\u5bb6\u5e26\u6765\u300aRedis\u5206\u5e03\u5f0f\u9501\u5b9e\u4f8b\u5206\u6790\u8bb2\u89e3\u300b<\/span>\uff0c\u4ee5\u4e0b\u5185\u5bb9\u4e3b\u8981\u5305\u542bRedis\u5206\u5e03\u5f0f\u9501<\/span>\u7b49\u77e5\u8bc6\u70b9\uff0c\u5982\u679c\u4f60\u6b63\u5728\u5b66\u4e60\u6216\u51c6\u5907\u5b66\u4e60\u6570\u636e\u5e93<\/span>\uff0c\u5c31\u90fd\u4e0d\u8981\u9519\u8fc7\u672c\u6587\u5566~\u8ba9\u6211\u4eec\u4e00\u8d77\u6765\u770b\u770b\u5427\uff0c\u80fd\u5e2e\u52a9\u5230\u4f60\u5c31\u66f4\u597d\u4e86\uff01<\/span><\/p>\n

1 \u4e00\u4eba\u4e00\u5355\u5e76\u53d1\u5b89\u5168\u95ee\u9898<\/h2>\n

\u4e4b\u524d\u4e00\u4eba\u4e00\u5355\u7684\u4e1a\u52a1\u4f7f\u7528\u7684\u60b2\u89c2\u9501\uff0c\u5728\u5206\u5e03\u5f0f\u7cfb\u7edf\u4e0b\uff0c\u662f\u65e0\u6cd5\u751f\u6548\u7684\u3002<\/p>\n

\u7406\u60f3\u7684\u60c5\u51b5\u4e0b\u662f\u8fd9\u6837\u7684\uff1a\u4e00\u4e2a\u7ebf\u7a0b\u6210\u529f\u83b7\u53d6\u4e92\u65a5\u9501\uff0c\u5e76\u5bf9\u67e5\u8be2\u8ba2\u5355\u5e76\u521b\u5efa\u8ba2\u5355\uff0c\u5176\u4ed6\u7ebf\u7a0b\u65e0\u6cd5\u5e72\u9884\u3002\u5b83\u7684\u539f\u7406\u662f\u4f1a\u6709\u4e00\u4e2a\u9501\u76d1\u89c6\u5668\uff0c\u6765\u76d1\u542c\u662f\u8c01\u83b7\u5f97\u4e86\u9501\u3002<\/p>\n

<\/p>\n

\u4f46\u662f\u95ee\u9898\u5c31\u51fa\u73b0\u5728\uff1a<\/p>\n

\u5206\u5e03\u5f0f\u7cfb\u7edf\u4e0b\uff0c\u6709\u591a\u4e2a\u4e0d\u540c\u7684JVM\uff0c\u4e0d\u540c\u7684JVM\u7684\u73af\u5883\u4e0b\uff0c\u9501\u76d1\u542c\u5668\u662f\u6709\u591a\u4e2a\u7684\uff0c\u5c31\u4f1a\u51fa\u73b0\u6709\u7684\u7ebf\u7a0b\u5728\u522b\u7684\u7ebf\u7a0b\u5df2\u7ecf\u62ff\u5230\u9501\u7684\u60c5\u51b5\u4e0b\uff0c\u4ecd\u7136\u53ef\u4ee5\u83b7\u53d6\u7684\u5230\u9501\u3002<\/p>\n

<\/p>\n

\u8fd9\u4e2a\u65f6\u5019\uff0c\u666e\u901a\u7684JVM\u4e2d\u7684\u9501\u5c31\u5df2\u7ecf\u4e0d\u7ba1\u7528\u4e86\uff0c\u5c31\u9700\u8981\u6211\u4eec\u5229\u7528\u5206\u5e03\u5f0f\u9501 \u3002<\/p>\n

2 \u5206\u5e03\u5f0f\u9501\u7684\u539f\u7406\u548c\u5b9e\u73b0<\/h2>\n

2.1 \u4ec0\u4e48\u662f\u5206\u5e03\u5f0f\u9501<\/h3>\n

\u5c31\u662f\u53ef\u4ee5\u6ee1\u8db3\u5206\u5e03\u5f0f\u7cfb\u7edf\u6216\u96c6\u7fa4\u6a21\u5f0f\u4e0b\u591a\u8fdb\u7a0b\u53ef\u89c1\u5e76\u4e14\u4e92\u65a5\u7684\u9501\u3002<\/p>\n

\u5b83\u7684\u5b9e\u73b0\u539f\u7406\u5c31\u662f\uff0c\u4e0d\u540c\u7684JVM\u73af\u5883\uff0c\u90fd\u6765\u5171\u7528\u4e00\u4e2a\u9501\u76d1\u89c6\u5668\u3002\u8fd9\u6837\u5c31\u4e0d\u4f1a\u5bfc\u81f4\u51fa\u73b0\u591a\u4e2a\u7ebf\u7a0b\u7528\u591a\u628a\u9501\u7684\u60c5\u51b5\u4e86\u3002<\/p>\n

<\/p>\n

\u7279\u70b9\uff1a<\/p>\n

<\/p>\n

2.2 \u5206\u5e03\u5f0f\u9501\u7684\u5b9e\u73b0<\/h3>\n

\u4e3b\u8981\u6709\u4e09\u79cd\u5b9e\u73b0\u65b9\u6cd5\uff0c\u6211\u4eec\u53ef\u4ee5\u90fd\u6765\u8fdb\u884c\u4e00\u4e2a\u5bf9\u6bd4\u3002<\/p>\n

\u5982\u4e0b\u56fe\uff1a<\/p>\n

<\/p>\n

\u8fd9\u91cc\u4e3b\u8981\u8bb2\u57fa\u4e8eRedis\u7684\u5206\u5e03\u5f0f\u9501\u7684\u5b9e\u73b0 \u3002<\/p>\n

\u5b9e\u73b0Reids\u5206\u5e03\u5f0f\u9501\u7684\u65b9\u6cd5\u4e3b\u8981\u5c31\u4e0b\u9762\u4e24\u4e2a\u6b65\u9aa4\uff1a<\/p>\n

1. \u83b7\u53d6\u9501<\/p>\n

\u83b7\u53d6\u9501\u7684\u65b9\u6cd5\u5df2\u7ecf\u662f\u8001\u670b\u53cb\u4e86\uff0c\u5c31\u662f\u4f7f\u7528Redis String\u7c7b\u578b\u65b9\u6cd5\u4e2d\u7684setnx\u65b9\u6cd5\uff08\u4e92\u65a5\u6027\uff09\u3002\u4f46\u662f\uff0c\u4e3a\u4e86\u9884\u9632redis\u670d\u52a1\u5668\u5b95\u673a\u7684\u95ee\u9898\uff0c\u6211\u4eec\u8981\u7ed9\u9501\u8bbe\u7f6e\u4e00\u4e2a\u8d85\u65f6\u65f6\u95f4\uff0c\u907f\u514d\u51fa\u73b0\u6b7b\u9501\u3002\uff08\u975e\u963b\u585e\uff09<\/p>\n

\u6240\u4ee5\uff0c\u83b7\u53d6\u9501\u7684\u65b9\u5f0f\u53ef\u4ee5\u4f7f\u7528\u5982\u4e0b\u4ee3\u7801<\/p>\n

\n

SET lock thread1 nx ex 10<\/p>\n<\/blockquote>\n

lock\u662f\u9501\u7684key\uff0cthread1 \u662fvalue\uff0cnx\u5c31\u662fsetnx\u65b9\u6cd5\uff0cex\u5c31\u662f\u8bbe\u7f6e\u8d85\u65f6\u65f6\u95f4<\/p>\n

2. \u91ca\u653e\u9501<\/p>\n

\u91ca\u653e\u9501\u5c31\u7b80\u5355\u4e86\uff0c\u5220\u9664\u5373\u53ef\u3002<\/p>\n

\n

del lock<\/p>\n<\/blockquote>\n

\u4ee3\u7801\u5b9e\u73b0\uff1a<\/p>\n

\u9700\u6c42\uff1a\u5b9a\u4e49\u4e00\u4e2a\u63a5\u53e3\uff0c\u5229\u7528Redis\u5b9e\u73b0\u5206\u5e03\u5f0f\u9501\u7684\u529f\u80fd\u3002<\/p>\n

<\/p>\n

\u4ee3\u7801\u5982\u4e0b\uff1a<\/p>\n

\u63a5\u53e3\u4ee3\u7801\uff1a<\/p>\n

package com.hmdp.utils;\npublic interface ILock {\n    \/**\n     * \u5c1d\u8bd5\u83b7\u53d6\u9501\n     * @param timeoutSec \u9501\u7684\u6301\u6709\u65f6\u95f4\uff0c\u8fc7\u671f\u81ea\u52a8\u91ca\u653e\n     * @return true\u4ee3\u8868\u83b7\u53d6\u9501\u6210\u529f\uff0cfalse\u4ee3\u8868\u83b7\u53d6\u9501\u5931\u8d25\u3002\n     *\/\n    boolean tryLock(long timeoutSec);\n    \/**\n     * \u91ca\u653e\u9501\n     *\/\n    void unlock();\n}<\/pre>\n
\u63a5\u53e3\u5b9e\u73b0\u7c7b\uff1a<\/p>\n
package com.hmdp.utils;\nimport org.springframework.data.redis.core.StringRedisTemplate;\nimport java.util.concurrent.TimeUnit;\n\/**\n * @Version 1.0\n *\/\npublic class SimpleRedisLock implements ILock {\n    \/\/Redis\n    private StringRedisTemplate stringRedisTemplate;\n    \/\/\u4e1a\u52a1\u540d\u79f0\uff0c\u4e5f\u5c31\u662f\u9501\u7684\u540d\u79f0\n    private String name;\n    public SimpleRedisLock(StringRedisTemplate stringRedisTemplate, String name) {\n        this.stringRedisTemplate = stringRedisTemplate;\n        this.name = name;\n    }\n    \/\/key\u7684\u524d\u7f00\n    private static final String KEY_PREFIX = \"lock:\";\n    @Override\n    public boolean tryLock(long timeoutSec) {\n        \/\/\u83b7\u53d6\u7ebf\u7a0bid\uff0c\u5f53\u4f5cset\u7684value\n        long threadId = Thread.currentThread().getId();\n        Boolean success = stringRedisTemplate.opsForValue()\n                .setIfAbsent(KEY_PREFIX + name, threadId+\"\", timeoutSec, TimeUnit.SECONDS);\n        return Boolean.TRUE.equals(success);\n    }\n    \/\/\u91ca\u653e\u9501\n    @Override\n    public void unlock() {\n        \/\/\u5220\u9664key\n        stringRedisTemplate.delete(KEY_PREFIX+name);\n    }\n}<\/pre>\n
\u4e1a\u52a1\u5c42\u83b7\u53d6\u9501\u548c\u91ca\u653e\u9501\uff08\u4f18\u60e0\u5238\u79d2\u6740\u4e1a\u52a1\u4fee\u6539\uff09<\/p>\n
package com.hmdp.service.impl;\nimport com.hmdp.dto.Result;\nimport com.hmdp.entity.SeckillVoucher;\nimport com.hmdp.entity.VoucherOrder;\nimport com.hmdp.mapper.VoucherOrderMapper;\nimport com.hmdp.service.ISeckillVoucherService;\nimport com.hmdp.service.IVoucherOrderService;\nimport com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;\nimport com.hmdp.utils.RedisIdWorker;\nimport com.hmdp.utils.SimpleRedisLock;\nimport com.hmdp.utils.UserHolder;\nimport org.springframework.aop.framework.AopContext;\nimport org.springframework.data.redis.core.StringRedisTemplate;\nimport org.springframework.stereotype.Service;\nimport org.springframework.transaction.annotation.Transactional;\nimport javax.annotation.Resource;\nimport java.time.LocalDateTime;\n\/**\n * 
\n *  \u670d\u52a1\u5b9e\u73b0\u7c7b\n * <\/p>\n *\n *\/\n@Service\npublic class VoucherOrderServiceImpl extends ServiceImpl\n   \n     implements IVoucherOrderService {\n \n    @Resource\n    private ISeckillVoucherService iSeckillVoucherService;\n    @Resource\n    private RedisIdWorker redisIdWorker;\n    @Resource\n    private StringRedisTemplate stringRedisTemplate;\n    @Override\n    public Result seckillVoucher(Long voucherId) {\n        \/\/1.\u83b7\u53d6\u4f18\u60e0\u5238\u4fe1\u606f\n        SeckillVoucher voucher = iSeckillVoucherService.getById(voucherId);\n        \/\/2.\u5224\u65ad\u662f\u5426\u5df2\u7ecf\u5f00\u59cb\n        if (voucher.getBeginTime().isAfter(LocalDateTime.now())){\n            Result.fail(\"\u79d2\u6740\u5c1a\u672a\u5f00\u59cb!\");\n        }\n        \/\/3.\u5224\u65ad\u662f\u5426\u5df2\u7ecf\u7ed3\u675f\n        if (voucher.getEndTime().isBefore(LocalDateTime.now())){\n            Result.fail(\"\u79d2\u6740\u5df2\u7ecf\u7ed3\u675f\u4e86!\");\n        }\n        \/\/4.\u5224\u65ad\u5e93\u5b58\u662f\u5426\u5145\u8db3\n        if (voucher.getStock()  0) {\n            return Result.fail(\"\u7528\u6237\u5df2\u7ecf\u8d2d\u4e70\uff01\");\n        }\n        \/\/7. \u521b\u5efa\u8ba2\u5355\n        VoucherOrder voucherOrder = new VoucherOrder();\n        \/\/7.1\u6dfb\u52a0\u8ba2\u5355id\n        Long orderId = redisIdWorker.nextId(\"order\");\n        voucherOrder.setId(orderId);\n        \/\/7.2\u6dfb\u52a0\u7528\u6237id\n        voucherOrder.setUserId(userId);\n        \/\/7.3\u6dfb\u52a0\u4f18\u60e0\u5238id\n        voucherOrder.setVoucherId(voucherId);\n        save(voucherOrder);\n        \/\/8.\u8fd4\u56de\u8ba2\u5355id\n        return Result.ok(orderId);\n    }\n}\n   <\/pre>\n","protected":false},"excerpt":{"rendered":"
Redis\u5206\u5e03\u5f0f\u9501\u5b9e\u4f8b\u5206\u6790\u8bb2\u89e3 ...<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[101],"tags":[],"class_list":["post-201630","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/201630","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/comments?post=201630"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/201630\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=201630"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=201630"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=201630"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}