\u52a0\u9501\u4f7f\u7528\u65b0\u7248\u7684api set (key, value, nx, px, expireTime)\uff0c\u4fdd\u8bc1\u539f\u5b50\u6027\uff0c\u4ee5\u53ca\u8d85\u65f6\u673a\u5236
\u89e3\u9501\u4f7f\u7528lua\u8868\u8fbe\u5f0f\uff0c\u5224\u65ad\u89e3\u9501\u4eba\u662f\u5426\u662f\u52a0\u9501\u4eba\uff0c\u9632\u6b62\u8d85\u65f6\u540e\u89e3\u4e86\u522b\u4eba\u7684\u9501\u3002<\/p>\n\n\n\n
package com.utils;<\/p>\n\n\n\n
import java.util.Collections;
import java.util.UUID;<\/p>\n\n\n\n
import redis.clients.jedis.Jedis;<\/p>\n\n\n\n
public class RedisTool {<\/p>\n\n\n\n
private static final String LOCK_SUCCESS = \"OK\";\nprivate static final String SET_IF_NOT_EXIST = \"NX\";\nprivate static final String SET_WITH_EXPIRE_TIME = \"PX\";\nprivate static final String SCRIPT = \"if redis.call('get', KEYS[1]) == ARGV[1] then return redis.call('del', KEYS[1]) else return 0 end\";\nprivate static final Long RELEASE_SUCCESS = 1L;\n\n\/\/ test\nprivate int count = 0;\n\n\/**\n * \u83b7\u53d6\u8bf7\u6c42Id \n * @return \u8fd4\u56deUUID\n *\/\npublic static String getRequestId(){\n return UUID.randomUUID().toString();\n}\n\n\/**\n * \u5c1d\u8bd5\u83b7\u53d6\u5206\u5e03\u5f0f\u9501\n * @param jedis Redis\u5ba2\u6237\u7aef\n * @param lockKey \u9501\n * @param requestId \u8bf7\u6c42\u6807\u8bc6\n * @param expireTime \u8d85\u671f\u65f6\u95f4\n * @return \u662f\u5426\u83b7\u53d6\u6210\u529f\n *\/\npublic static boolean tryGetDistributedLock(Jedis jedis, String lockKey, String requestId, int expireTime) {\n\n String result = jedis.set(lockKey, requestId, SET_IF_NOT_EXIST, SET_WITH_EXPIRE_TIME, expireTime);\n\n if (LOCK_SUCCESS.equals(result)) {\n return true;\n }\n return false;\n}\n\n\n\/**\n * \u91ca\u653e\u5206\u5e03\u5f0f\u9501\n * @param jedis Redis\u5ba2\u6237\u7aef\n * @param lockKey \u9501\n * @param requestId \u8bf7\u6c42\u6807\u8bc6\n * @return \u662f\u5426\u91ca\u653e\u6210\u529f\n *\/\npublic static boolean releaseDistributedLock(Jedis jedis, String lockKey, String requestId) {\n\n Object result = jedis.eval(SCRIPT, Collections.singletonList(lockKey), Collections.singletonList(requestId));\n\n if (RELEASE_SUCCESS.equals(result)) {\n return true;\n }\n return false;\n}\n\npublic static void main(String[] args) {\n RedisTool redisTool = new RedisTool();\n redisTool.testDistributedLock();\n}\n\npublic void testDistributedLock() {\n for (int i = 0; i < 10; i++) {\n new Thread(new Runnable() {\n\n @Override\n public void run() {\n Jedis jedis = new Jedis(\"localhost\");\n String lockKey = \"lock\";\n String requestId = getRequestId();\n \/\/ \u52a0\u9501\n if (tryGetDistributedLock(jedis, lockKey, requestId, 10)) {\n count++;\n System.out.println(requestId + \":\" + count);\n \/\/ \u89e3\u9501\n releaseDistributedLock(jedis, lockKey, requestId);\n } else {\n System.out.println(requestId + \": tryGetDistributedLock fail\");\n }\n\n }\n }).start();\n }\n}<\/code><\/pre>\n\n\n\n}<\/p>\n","protected":false},"excerpt":{"rendered":"
\u52a0\u9501\u4f7f\u7528\u65b0\u7248\u7684api set (key, value, nx, px, expireTime)\uff0c\u4fdd\u8bc1\u539f\u5b50\u6027\uff0c\u4ee5 […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[6],"tags":[],"_links":{"self":[{"href":"https:\/\/www.zeroheart.xyz\/wordpress\/index.php?rest_route=\/wp\/v2\/posts\/159"}],"collection":[{"href":"https:\/\/www.zeroheart.xyz\/wordpress\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.zeroheart.xyz\/wordpress\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.zeroheart.xyz\/wordpress\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.zeroheart.xyz\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=159"}],"version-history":[{"count":2,"href":"https:\/\/www.zeroheart.xyz\/wordpress\/index.php?rest_route=\/wp\/v2\/posts\/159\/revisions"}],"predecessor-version":[{"id":161,"href":"https:\/\/www.zeroheart.xyz\/wordpress\/index.php?rest_route=\/wp\/v2\/posts\/159\/revisions\/161"}],"wp:attachment":[{"href":"https:\/\/www.zeroheart.xyz\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=159"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.zeroheart.xyz\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=159"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.zeroheart.xyz\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=159"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}