{"id":997,"date":"2020-06-01T17:15:40","date_gmt":"2020-06-01T09:15:40","guid":{"rendered":"http:\/\/diuut.com\/?p=997"},"modified":"2020-06-04T15:40:29","modified_gmt":"2020-06-04T07:40:29","slug":"%e8%87%aa%e5%ae%9a%e4%b9%89redis%e4%ba%8b%e5%8a%a1%e6%b3%a8%e8%a7%a3","status":"publish","type":"post","link":"https:\/\/diuut.com\/?p=997","title":{"rendered":"\u81ea\u5b9a\u4e49Redis\u4e8b\u52a1\u6ce8\u89e3"},"content":{"rendered":"\n<blockquote class=\"wp-block-quote\"><p>\u9700\u6c42<\/p><cite>Redis\u7684multi\u4e8b\u52a1\u6ca1\u6709\u627e\u5230\u65b9\u4fbf\u7684\u6846\u67b6\u80fd\u591f\u81ea\u5b9a\u4e49\u63d0\u4f9b\u6ce8\u89e3\uff0c\u60f3\u8981\u7684\u6548\u679c\u5c31\u662f\u5728\u4e00\u4e2a\u65b9\u6cd5\u4e0a\u6dfb\u52a0\u4e00\u4e2a\u6ce8\u89e3\u4ee5\u540e\u5c31\u53ef\u4ee5\u81ea\u52a8\u6dfb\u52a0redis\u4e8b\u52a1\uff0c\u65b9\u6cd5\u6267\u884c\u5931\u8d25\u6216\u8005\u5f53\u6b63\u5728\u4fee\u6539\u7684redis\u6570\u636e\u88ab\u4fee\u6539\u4e86\uff0c\u5c31\u4ece\u5934\u6267\u884c\u4e00\u6b21\u6216\u8005\u8fd4\u56de\u9519\u8bef\u7b49\u4e4b\u7c7b\u7684\u64cd\u4f5c\u3002\u5b9e\u73b0\u601d\u8def\u4e3b\u8981\u662f\u901a\u8fc7\u81ea\u5b9a\u4e49\u6ce8\u89e3\u4ee5\u53caaop\u73af\u7ed5\u901a\u77e5\u6765\u5b9e\u73b0\u3002<\/cite><\/blockquote>\n\n\n\n<p>\u9996\u5148\u5199\u4e00\u4e2a\u6ce8\u89e3\uff0c\u7528\u4e8e\u6807\u8bc6\u5728\u9700\u8981\u6dfb\u52a0\u4e8b\u52a1\u7684\u65b9\u6cd5\u4e0a\u3002<\/p>\n\n\n<div class=\"wp-block-syntaxhighlighter-code \"><pre class=\"brush: java; title: ; notranslate\" title=\"\">\n\/**\n * @Author Diuut\n * @Date 2020\/6\/1  10:51\n *\/\n@Target(ElementType.METHOD)\n@Retention(RetentionPolicy.RUNTIME)\n@Documented\n@Inherited\npublic @interface UserRedisTranscational {\n  public int NeedTryAgain() default 3;    \/\/\u9ed8\u8ba4\u91cd\u8bd5\u6b21\u6570\n}\n<\/pre><\/div>\n\n\n<p>\u7136\u540e\u901a\u8fc7aop\u7ed1\u5b9a\u8be5\u6ce8\u89e3\u3002<\/p>\n\n\n<div class=\"wp-block-syntaxhighlighter-code \"><pre class=\"brush: java; title: ; notranslate\" title=\"\">\n\/**\n * @Author Diuut\n * @Date 2020\/6\/1  10:49\n *\/\n@Aspect\n@Component\n@Slf4j\npublic class UserRedisTransactionalAspect {\n    @Autowired\n    private UserRedisDao userRedisDao;\n\n    @Around(value = &quot;@annotation(userRedisTransactional)&quot;)\n    public Object around(ProceedingJoinPoint point, UserRedisTransactional userRedisTransactional) {\n        log.info(&quot;++++\u6267\u884c\u4e86around\u65b9\u6cd5++++&quot;);\n        \/\/\u62e6\u622a\u7684\u7c7b\u540d\n        Class clazz = point.getTarget().getClass();\n        \/\/\u62e6\u622a\u7684\u65b9\u6cd5\n        Method method = ((MethodSignature) point.getSignature()).getMethod();\n        log.info(&quot;\u6267\u884c\u4e86 \u7c7b:&quot; + clazz + &quot; \u65b9\u6cd5:&quot; + method);\n        int tryAgain = userRedisTransactional.tryTimes();    \/\/\u91cd\u8bd5\u6b21\u6570\n        Object&#91;] args = point.getArgs();\n        User user = (User) args&#91;0];\n        int uid = user.getUid();\n        log.info(&quot;uid: {}&quot;, uid);\n        Object proceed = null;\n        try {\n            List list = null;\n            do {\n                if (tryAgain &lt;= 0) {\n                    \/\/\u5982\u679c\u5faa\u73af\u6b21\u6570\u7ed3\u675f\u540e\u4f9d\u65e7\u88ab\u9501\uff0c\u5c31\u4e0d\u6267\u884c\uff0c\u76f4\u63a5\u7ed3\u675f\uff0c\u8fd4\u56de\u503c null\n                    return null;\n                } else {\n                    tryAgain--;\n                }\n                userRedisDao.watchAndMulti(uid);\n                User userByUid = userRedisDao.getUserByUid(uid);\n                userByUid.setLastVersion(4);\n                args&#91;0] = userByUid;\n                log.info(&quot;proceed\u5faa\u73af\u4e2d&quot;);\n                proceed = point.proceed(args);    \/\/\u6267\u884c\u65b9\u6cd5\uff0c\u4ee5\u6700\u65b0\u83b7\u53d6\u7684\u53c2\u6570\uff08\u5982\u679c\u4e0d\u5e26args\u5c31\u662f\u7528\u539f\u5148\u7684\u53c2\u6570\uff09\n                list = userRedisDao.exec();\n            } while (list.isEmpty());\n            log.info(&quot;list.proceed\u5faa\u73af\u7ed3\u675f&quot;);\n        } catch (Throwable throwable) {\n            throwable.printStackTrace();\n            return null;\n        }\n        return proceed;\n    }\n}\n<\/pre><\/div>\n\n\n<p>\u4f7f\u7528\u6ce8\u89e3\u3002\u73af\u7ed5\u901a\u77e5\u4f1a\u4ece\u62e6\u622a\u7684\u65b9\u6cd5\u4e2d\u81ea\u52a8\u83b7\u53d6\u5230User\u5bf9\u8c61\uff0c\u7136\u540e\u6839\u636e\u8c03\u7528redistTemplate\u4e2d\u7684watch\u4ee5\u53camulti\u65b9\u6cd5\uff0c\u76d1\u63a7\u8fd9\u4e2auser\u7684key\u503c\uff0c\u5e76\u6dfb\u52a0\u4e8b\u52a1\u3002\u671f\u95f4\u53ef\u4ee5\u901a\u8fc7\u4fee\u6539args\u6765\u4fee\u6539\u53c2\u6570\u3002\u672c\u7bc7\u4e2d\u662f\u5728\u5f00\u59cb\u76d1\u63a7user\u4e4b\u540e\uff0c\u518d\u6b21\u4eceredis\u4e2d\u83b7\u53d6\u4e00\u6b21\u503c\uff0c\u4ee5\u786e\u4fdd\u5728\u65b9\u6cd5\u6267\u884c\u671f\u95f4\uff0c\u4e0a\u9501\u4e4b\u524d\u4e0d\u88ab\u4fee\u6539\u3002<\/p>\n\n\n<div class=\"wp-block-syntaxhighlighter-code \"><pre class=\"brush: java; title: ; notranslate\" title=\"\">\n    @UserRedisTransactional(NeedTryAgain = 5)\n    public void test32(User user) throws InterruptedException {\n        user.setLoginKey(&quot;happyPalmTiger&quot;);\n        userRedisDao.saveUser(user);\n    }\n<\/pre><\/div>","protected":false},"excerpt":{"rendered":"<p>\u9700\u6c42 Redis\u7684multi\u4e8b\u52a1\u6ca1\u6709\u627e\u5230\u65b9\u4fbf\u7684\u6846\u67b6\u80fd\u591f\u81ea\u5b9a\u4e49\u63d0\u4f9b\u6ce8\u89e3\uff0c\u60f3\u8981\u7684\u6548\u679c\u5c31\u662f\u5728\u4e00\u4e2a\u65b9\u6cd5\u4e0a\u6dfb\u52a0\u4e00\u4e2a\u6ce8\u89e3\u4ee5<span class=\"more-button\"><a href=\"https:\/\/diuut.com\/?p=997\" class=\"more-link\">view all . . .<span class=\"screen-reader-text\">\u81ea\u5b9a\u4e49Redis\u4e8b\u52a1\u6ce8\u89e3<\/span><\/a><\/span><\/p>\n","protected":false},"author":1,"featured_media":657,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[2],"tags":[18,10],"_links":{"self":[{"href":"https:\/\/diuut.com\/index.php?rest_route=\/wp\/v2\/posts\/997"}],"collection":[{"href":"https:\/\/diuut.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/diuut.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/diuut.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/diuut.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=997"}],"version-history":[{"count":6,"href":"https:\/\/diuut.com\/index.php?rest_route=\/wp\/v2\/posts\/997\/revisions"}],"predecessor-version":[{"id":1012,"href":"https:\/\/diuut.com\/index.php?rest_route=\/wp\/v2\/posts\/997\/revisions\/1012"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/diuut.com\/index.php?rest_route=\/wp\/v2\/media\/657"}],"wp:attachment":[{"href":"https:\/\/diuut.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=997"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/diuut.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=997"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/diuut.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=997"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}