{"id":201320,"date":"2025-05-10T11:15:20","date_gmt":"2025-05-10T03:15:20","guid":{"rendered":"https:\/\/server.hk\/cnblog\/201320\/"},"modified":"2025-05-10T11:15:20","modified_gmt":"2025-05-10T03:15:20","slug":"redis%e5%88%86%e5%b8%83%e5%bc%8f%e9%94%81%e7%9a%84%e9%97%ae%e9%a2%98%e4%b8%8e%e8%a7%a3%e5%86%b3%e6%96%b9%e6%b3%95","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/201320\/","title":{"rendered":"redis\u5206\u5e03\u5f0f\u9501\u7684\u95ee\u9898\u4e0e\u89e3\u51b3\u65b9\u6cd5"},"content":{"rendered":"

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

redis\u5206\u5e03\u5f0f\u9501\u7684\u95ee\u9898\u4e0e\u89e3\u51b3\u65b9\u6cd5<\/h1>\n

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

\u6765\u5230golang\u5b66\u4e60\u7f51\u7684\u5927\u5bb6\uff0c\u76f8\u4fe1\u90fd\u662f\u7f16\u7a0b\u5b66\u4e60\u7231\u597d\u8005\uff0c\u5e0c\u671b\u5728\u8fd9\u91cc\u5b66\u4e60\u6570\u636e\u5e93\u76f8\u5173\u7f16\u7a0b\u77e5\u8bc6\u3002\u4e0b\u9762\u672c\u7bc7\u6587\u7ae0\u5c31\u6765\u5e26\u5927\u5bb6\u804a\u804a\u300aredis\u5206\u5e03\u5f0f\u9501\u7684\u95ee\u9898\u4e0e\u89e3\u51b3\u65b9\u6cd5\u300b\uff0c\u4ecb\u7ecd\u4e00\u4e0b\u9501\u3001Redis\u5206\u5e03\u5f0f\uff0c\u5e0c\u671b\u5bf9\u5927\u5bb6\u7684\u77e5\u8bc6\u79ef\u7d2f\u6709\u6240\u5e2e\u52a9\uff0c\u52a9\u529b\u5b9e\u6218\u5f00\u53d1\uff01<\/p>\n

\u5206\u5e03\u5f0f\u9501<\/strong><\/span><\/p>\n

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\npublic void doSomething(String userId){\n  User user=getUser(userId);\n  if(user==null){\n   user.setUserName(\"xxxxx\");\n   user.setUserId(userId);\n   insert(user);\n   return;\n  }\n  update(user);\n }<\/pre>\n
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\npublic synchronized void doSomething(String userId){\n  User user=getUser(userId);\n  if(user==null){\n   user.setUserName(\"xxxxx\");\n   user.setUserId(userId);\n   insert(user);\n   return;\n  }\n  update(user);\n }<\/pre>\n
\u5728\u5355\u673a\u5668\u7684\u73af\u5883\u4e0b\uff0c\u80fd\u591f\u89e3\u51b3\u7ebf\u7a0b\u5b89\u5168\u7684\u95ee\u9898\uff0c\u90a3\u5728\u5206\u5e03\u5f0f\u73af\u5883\u4e0b\u5462\uff1f \u8fd9\u4e2a\u65f6\u5019\u9700\u8981\u7528\u5230\u5206\u5e03\u5f0f\u9501.<\/p>\n
\u5206\u5e03\u5f0f\u9501\u9700\u8981\u501f\u52a9\u5176\u4ed6\u7ec4\u4ef6\u6765\u5b9e\u73b0\uff0c\u5e38\u7528\u7684\u6709redis\u548czookeeper\u3002\u4e0b\u9762\u6211\u4eec\u5c31\u7528redis\u7684\u5b9e\u73b0\uff0c\u6765\u8bf4\u660e\u4e0b\u95ee\u9898\uff0c\u5206\u5e03\u5f0f\u9501\u5177\u4f53\u7684\u5b9e\u73b0\u65b9\u6cd5\u5982\u4e0b<\/p>\n
\npublic void doSomething(String userId){\n  String lock=RedisUtils.get(\"xxxx\"+userId);\n  if(StringUtils.isNotEmpty(lock)){\/\/\u8bf4\u660e\u5f53\u524duserId\u5df2\u7ecf\u88ab\u9501\u5b9a\n   return;\n  }\n  RedisUtils.set(\"xxxx\"+userId,userId,1000);\/\/\u9501\u5b9a10s\n  User user=getUser(userId);\n  if(user==null){\n   insert(user);\n   RedisUtils.delete(\"xxxx\"+userId);\n   return;\n  }\n  update(user);\n  RedisUtils.delete(\"xxxx\"+userId);\n  \n }<\/pre>\n
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\npublic void doSomething(String userId){\n  try {\n    String lock=RedisUtils.get(\"xxxx\"+userId);\n    if(StringUtils.isNotEmpty(lock)){\/\/\u8bf4\u660e\u5f53\u524duserId\u5df2\u7ecf\u88ab\u9501\u5b9a\n     return;\n    }\n    RedisUtils.set(\"xxxx\"+userId,userId,1000);\/\/\u9501\u5b9a1s\n    User user=getUser(userId);\n    if(user==null){\n     insert(user);\n     return;\n    }\n    update(user);\n  }\n  catch(Exception ex){\n\n  }\n  finally{\n   RedisUtils.delete(\"xxxx\"+userId);\n  }\n }<\/pre>\n
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\npublic void doSomething(String userId){\n  try {\n    boolean lock=RedisUtils.setnx(\"xxxx\"+userId,userId,1000);\/\/\u9501\u5b9a1s\n    if(!lock){\/\/\u8bf4\u660e\u5f53\u524duserId\u5df2\u7ecf\u88ab\u9501\u5b9a\n     return;\n    }\n    User user=getUser(userId);\n    if(user==null){\n     insert(user);\n     return;\n    }\n    update(user);\n  }\n  catch(Exception ex){\n\n  }\n  finally{\n   RedisUtils.delete(\"xxxx\"+userId);\n  }\n }<\/pre>\n
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\u601d\u8def\uff1a<\/strong><\/span>\u6211\u4eec\u5728\u9501\u5b9a\u7684\u65f6\u5019\uff0cvalue\u4f7f\u7528\u5f53\u524d\u7684\u65f6\u95f4\u6233\uff0c\u5220\u9664\u65f6\u5224\u65ad\u662f\u5426\u8fc7\u671f\u5982\u679c\u4e0d\u8fc7\u671f\u5c31\u4e0d\u8981\u5220\u9664\uff0c\u5177\u4f53\u4ee3\u7801\u5982\u4e0b\uff1a<\/p>\n
\npublic void doSomething(String userId){\n  try {\n    boolean lock=RedisUtils.setnx(\"xxxx\"+userId,LocalDateTime.now(),1000);\/\/\u9501\u5b9a10s\n    if(!lock){\/\/\u8bf4\u660e\u5f53\u524duserId\u5df2\u7ecf\u88ab\u9501\u5b9a\n     return;\n    }\n    User user=getUser(userId);\n    if(user==null){\n     insert(user);\n     return;\n    }\n    update(user);\n  }\n  catch(Exception ex){\n\n  }\n  finally{\n   LocalDateTime lockTIme= RedisUtils.get(\"xxxx\"+userId);\n   if(lockTIme.compare(LocalDateTime.now())\n\n
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\u603b\u7ed3<\/strong><\/span><\/p>\n
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