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<!-- build time:Sat Dec 07 2024 18:41:42 GMT+0800 (中国标准时间) --><!DOCTYPE html><html lang="zh-CN"><head><meta charset="UTF-8"><meta name="viewport" content="width=device-width,initial-scale=1,maximum-scale=2"><meta name="theme-color" content="#FFF"><link rel="apple-touch-icon" sizes="180x180" href="/images/apple-touch-icon.png"><link rel="icon" type="image/ico" sizes="32x32" href="/images/favicon.ico"><meta http-equiv="Cache-Control" content="no-transform"><meta http-equiv="Cache-Control" content="no-siteapp"><link rel="alternate" type="application/rss+xml" title="爱WIKI" href="https://i-wiki.cn/rss.xml"><link rel="alternate" type="application/atom+xml" title="爱WIKI" href="https://i-wiki.cn/atom.xml"><link rel="alternate" type="application/json" title="爱WIKI" href="https://i-wiki.cn/feed.json"><link rel="stylesheet" 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id="main" class="pjax"><div class="index wrap"><h2 class="divider">精选分类</h2><div class="cards"><section class="item"><div class="cover" data-background-image="/backend/cover.jpg"><h2 class="title">后端</h2></div><div class="info"><div class="ribbon"><a href="/categories/backend/" itemprop="url" title="后端">后端</a></div><div class="inner"><ul class="posts"><li><a title="go" href="/categories/backend/go/">go</a></li><li><a title="mysql" href="/categories/backend/mysql/">mysql</a></li><li><a title="分布式事务" href="/categories/backend/%E5%88%86%E5%B8%83%E5%BC%8F%E4%BA%8B%E5%8A%A1/">分布式事务</a></li></ul><div class="meta footer"><span><i class="ic i-file"></i>3 个子项，13 篇文章</span></div><a href="/categories/backend/" itemprop="url" title="后端" class="btn">more...</a></div></div></section><section class="item"><div class="cover" data-background-image="/tools/cover.jpg"><h2 class="title">工具</h2></div><div class="info"><div class="ribbon"><a href="/categories/tools/" itemprop="url" title="工具">工具</a></div><div class="inner"><ul class="posts"><li><a title="aria2" href="/categories/tools/aria2/">aria2</a></li></ul><div class="meta footer"><span><i class="ic i-file"></i>1 个子项，1 篇文章</span></div><a href="/categories/tools/" itemprop="url" title="工具" class="btn">more...</a></div></div></section></div><h2 class="divider">文章列表</h2><div class="segments posts"><article class="item"><div class="cover"><a href="/2024/343f91fc83c3/" itemprop="url" title="Go基础-常用容器"><img data-src="https://tva2.sinaimg.cn/mw690/6833939bly1gipeun65urj20zk0m81ii.jpg"></a></div><div class="info"><div class="meta"><span class="item" title="创建时间：2024-12-03 22:08:38"><span class="icon"><i class="ic i-calendar"></i> </span><time itemprop="dateCreated datePublished" datetime="2024-12-03T22:08:38+08:00">2024-12-03</time> </span><span class="item" title="本文字数"><span class="icon"><i class="ic i-pen"></i> </span><span>1.2k</span> <span class="text">字</span> </span><span class="item" title="阅读时长"><span class="icon"><i class="ic i-clock"></i> </span><span>1 分钟</span></span></div><h3><a href="/2024/343f91fc83c3/" itemprop="url" title="Go基础-常用容器">Go基础-常用容器</a></h3><div class="excerpt"># GO 中常用容器 # 1. 数组 // 申明时需要固定大小 var name [size] Tvar classMates [3]stringclassMates[0] = "小明"classMates[1] = "小红"classMates[2] = "小李"classMates2 := [...]string&#123;"小明","小红","小李"&#125; // 使用初始化列表初始化数组classMates3 = new([3]string)...</div><div class="meta footer"><span><a href="/categories/backend/go/" itemprop="url" title="go"><i class="ic i-flag"></i>go</a></span></div><a href="/2024/343f91fc83c3/" itemprop="url" title="Go基础-常用容器" class="btn">more...</a></div></article><article class="item"><div class="cover"><a href="/2023/e378d05a98d4/" itemprop="url" title="Mysql 添加远程账号"><img data-src="https://tva2.sinaimg.cn/mw690/6833939bly1gipevarprfj20zk0m8npd.jpg"></a></div><div class="info"><div class="meta"><span class="item" title="创建时间：2023-02-16 17:28:16"><span class="icon"><i class="ic i-calendar"></i> </span><time itemprop="dateCreated datePublished" datetime="2023-02-16T17:28:16+08:00">2023-02-16</time> </span><span class="item" title="本文字数"><span class="icon"><i class="ic i-pen"></i> </span><span>182</span> <span class="text">字</span> </span><span class="item" title="阅读时长"><span class="icon"><i class="ic i-clock"></i> </span><span>1 分钟</span></span></div><h3><a href="/2023/e378d05a98d4/" itemprop="url" title="Mysql 添加远程账号">Mysql 添加远程账号</a></h3><div class="excerpt">添加一个新账号 create user 'account'@'%' identified by 'password'; 赋予新账号权限 grant all privileges on `Test`.* to 'account'@'%' ; #权限参考 all 所有权限 select 查询权限 insert 插入权限 delete 删除权限 update 更新权限 *.* 所有表 刷新权限 FLUSH PRIVILEGES;</div><div class="meta footer"><span><a href="/categories/backend/mysql/" itemprop="url" title="mysql"><i class="ic i-flag"></i>mysql</a></span></div><a href="/2023/e378d05a98d4/" itemprop="url" title="Mysql 添加远程账号" class="btn">more...</a></div></article><article class="item"><div class="cover"><a href="/2023/8cf859c786e2/" itemprop="url" title="Mysql8 新安装后无密码登录"><img data-src="https://tva2.sinaimg.cn/mw690/6833939bly1gipevgoki5j20zk0m84qp.jpg"></a></div><div class="info"><div class="meta"><span class="item" title="创建时间：2023-02-16 17:21:36"><span class="icon"><i class="ic i-calendar"></i> </span><time itemprop="dateCreated datePublished" datetime="2023-02-16T17:21:36+08:00">2023-02-16</time> </span><span class="item" title="本文字数"><span class="icon"><i class="ic i-pen"></i> </span><span>296</span> <span class="text">字</span> </span><span class="item" title="阅读时长"><span class="icon"><i class="ic i-clock"></i> </span><span>1 分钟</span></span></div><h3><a href="/2023/8cf859c786e2/" itemprop="url" title="Mysql8 新安装后无密码登录">Mysql8 新安装后无密码登录</a></h3><div class="excerpt">修改配置文件 vi /etc/my.cnf #进入 mysql 配置文件 在配置文件中设置 skip-grant-tables #即不校验密码登录 重启 mysql systemctl restart mysqldmysql -u root -p #不用输入密码，直接回车 将密码置空 update user set authentication_string='' where user = 'root'; 删除 2 中添加的配置项并重启 mysql 如需修改密码 ALTER USER...</div><div class="meta footer"><span><a href="/categories/backend/mysql/" itemprop="url" title="mysql"><i class="ic i-flag"></i>mysql</a></span></div><a href="/2023/8cf859c786e2/" itemprop="url" title="Mysql8 新安装后无密码登录" class="btn">more...</a></div></article><article class="item"><div class="cover"><a href="/2023/44b61dee094f/" itemprop="url" title="leetcode-1807. 替换字符串中的括号内容"><img data-src="https://tva2.sinaimg.cn/mw690/6833939bly1giclhnx9glj20zk0m8npd.jpg"></a></div><div class="info"><div class="meta"><span class="item" title="创建时间：2023-01-12 17:24:08"><span class="icon"><i class="ic i-calendar"></i> </span><time itemprop="dateCreated datePublished" datetime="2023-01-12T17:24:08+08:00">2023-01-12</time> </span><span class="item" title="本文字数"><span class="icon"><i class="ic i-pen"></i> </span><span>545</span> <span class="text">字</span> </span><span class="item" title="阅读时长"><span class="icon"><i class="ic i-clock"></i> </span><span>1 分钟</span></span></div><h3><a href="/2023/44b61dee094f/" itemprop="url" title="leetcode-1807. 替换字符串中的括号内容">leetcode-1807. 替换字符串中的括号内容</a></h3><div class="excerpt"># 1807. 替换字符串中的括号内容 难度：中等 解题思路： knowledge 转换 hashmap 便于查找 依次遍历 s，获取（）中的字符串为 key，如果 hashmap 中不存在 key 对应的 value 则替换为 &quot;?&quot; func evaluate(s string, knowledge [][]string) string &#123; var know = map[string]string&#123;&#125; for _, v := range knowledge &#123;...</div><div class="meta footer"><span><a href="/categories/%E7%AE%97%E6%B3%95/leetcode/" itemprop="url" title="leetcode"><i class="ic i-flag"></i>leetcode</a></span></div><a href="/2023/44b61dee094f/" itemprop="url" title="leetcode-1807. 替换字符串中的括号内容" class="btn">more...</a></div></article><article class="item"><div class="cover"><a href="/2021/fd677132940e/" itemprop="url" title="go 基础篇"><img data-src="https://tva2.sinaimg.cn/mw690/6833939bly1gipeun65urj20zk0m81ii.jpg"></a></div><div class="info"><div class="meta"><span class="item" title="创建时间：2021-12-01 00:46:24"><span class="icon"><i class="ic i-calendar"></i> </span><time itemprop="dateCreated datePublished" datetime="2021-12-01T00:46:24+08:00">2021-12-01</time> </span><span class="item" title="本文字数"><span class="icon"><i class="ic i-pen"></i> </span><span>2.2k</span> <span class="text">字</span> </span><span class="item" title="阅读时长"><span class="icon"><i class="ic i-clock"></i> </span><span>2 分钟</span></span></div><h3><a href="/2021/fd677132940e/" itemprop="url" title="go 基础篇">go 基础篇</a></h3><div class="excerpt"># 基本语法 # 1. 变量 // 申明的变量必须被使用 否则编译不通过var a intvar b string var c []float // 一个 float 类型的切片var d struct&#123; // 申明一个匿名结构体 该结构体有一个 int 类型字段 x x int&#125;var e func() bool // 申明一个函数变量var （ // 同时申明多组变量 f int g string）// 省略类型 编译器会尝试进行类型推导var a = 100 a := 100 // 编译报错 a, b = 100, "ok" //...</div><div class="meta footer"><span><a href="/categories/backend/go/" itemprop="url" title="go"><i class="ic i-flag"></i>go</a></span></div><a href="/2021/fd677132940e/" itemprop="url" title="go 基础篇" class="btn">more...</a></div></article><article class="item"><div class="cover"><a href="/2021/b8326b69e0d3/" itemprop="url" title="Mysql: on duplicate key update"><img data-src="https://tva2.sinaimg.cn/mw690/6833939bly1gicis3attqj20zk0m8k7l.jpg"></a></div><div class="info"><div class="meta"><span class="item" title="创建时间：2021-10-09 12:39:12"><span class="icon"><i class="ic i-calendar"></i> </span><time itemprop="dateCreated datePublished" datetime="2021-10-09T12:39:12+08:00">2021-10-09</time> </span><span class="item" title="本文字数"><span class="icon"><i class="ic i-pen"></i> </span><span>1.2k</span> <span class="text">字</span> </span><span class="item" title="阅读时长"><span class="icon"><i class="ic i-clock"></i> </span><span>1 分钟</span></span></div><h3><a href="/2021/b8326b69e0d3/" itemprop="url" title="Mysql: on duplicate key update">Mysql: on duplicate key update</a></h3><div class="excerpt"># 使用场景 在实际应用中，经常碰到导入数据的功能，当导入的数据不存在时则进行添加，有修改时则进行更新 在 MySQL 数据库中，如果在 insert 语句后面带上 ON DUPLICATE KEY UPDATE 子句，而要插入的行与表中现有记录的惟一索引或主键中产生重复值，那么就会发生旧行的更新；如果插入的行数据与现有表中记录的唯一索引或者主键不重复，则执行新纪录插入操作。 说通俗点就是数据库中存在某个记录时，执行这个语句会更新，而不存在这条记录时，就会插入。 # 用法 该语句是基于唯一索引或主键使用，比如一个字段 user_id 被加上了 unique...</div><div class="meta footer"><span><a href="/categories/backend/mysql/" itemprop="url" title="mysql"><i class="ic i-flag"></i>mysql</a></span></div><a href="/2021/b8326b69e0d3/" itemprop="url" title="Mysql: on duplicate key update" class="btn">more...</a></div></article><article class="item"><div class="cover"><a href="/2021/03643db49451/" itemprop="url" title="分布式事务：DTM Workflow模式"><img data-src="https://tva2.sinaimg.cn/mw690/6833939bly1gipet4bz0yj20zk0m8e81.jpg"></a></div><div class="info"><div class="meta"><span class="item" title="创建时间：2021-09-30 17:45:47"><span class="icon"><i class="ic i-calendar"></i> </span><time itemprop="dateCreated datePublished" datetime="2021-09-30T17:45:47+08:00">2021-09-30</time> </span><span class="item" title="本文字数"><span class="icon"><i class="ic i-pen"></i> </span><span>5.9k</span> <span class="text">字</span> </span><span class="item" title="阅读时长"><span class="icon"><i class="ic i-clock"></i> </span><span>5 分钟</span></span></div><h3><a href="/2021/03643db49451/" itemprop="url" title="分布式事务：DTM Workflow模式">分布式事务：DTM Workflow模式</a></h3><div class="excerpt"># Workflow 模式 Workflow 模式是 DTM 首创推出的模式，在这个模式下，可以混合使用 XA、SAGA、TCC，也可以混合使用 HTTP、gRPC、本地操作，用户可以对分布式事务里面的绝大部分内容进行定制，具备极大的灵活性，下面我们以转账场景，讲述如何在 Workflow 下进行实现。 # workflow 例子 Workflow 模式下，既可以使用 HTTP 协议，也可以使用 gRPC 协议，或者是本地操作。下面以 gRPC 协议作为例子，一共分为一下几步： 初始化 SDK 注册 workflow 执行 workflow # 首先需要在使用 workflow 前对...</div><div class="meta footer"><span><a href="/categories/backend/%E5%88%86%E5%B8%83%E5%BC%8F%E4%BA%8B%E5%8A%A1/%E4%BA%8B%E5%8A%A1%E6%A8%A1%E5%BC%8F/" itemprop="url" title="事务模式"><i class="ic i-flag"></i>事务模式</a></span></div><a href="/2021/03643db49451/" itemprop="url" title="分布式事务：DTM Workflow模式" class="btn">more...</a></div></article><article class="item"><div class="cover"><a href="/2021/d0caa7cb6848/" itemprop="url" title="分布式事务：DTM XA模式"><img data-src="https://tva2.sinaimg.cn/mw690/6833939bly1gicitht3xtj20zk0m8k5v.jpg"></a></div><div class="info"><div class="meta"><span class="item" title="创建时间：2021-09-30 17:34:59"><span class="icon"><i class="ic i-calendar"></i> </span><time itemprop="dateCreated datePublished" datetime="2021-09-30T17:34:59+08:00">2021-09-30</time> </span><span class="item" title="本文字数"><span class="icon"><i class="ic i-pen"></i> </span><span>2.2k</span> <span class="text">字</span> </span><span class="item" title="阅读时长"><span class="icon"><i class="ic i-clock"></i> </span><span>2 分钟</span></span></div><h3><a href="/2021/d0caa7cb6848/" itemprop="url" title="分布式事务：DTM XA模式">分布式事务：DTM XA模式</a></h3><div class="excerpt"># XA 事务模式 # XA 是什么 XA 是由 X/Open 组织提出的分布式事务的规范，XA 规范主要定义了 (全局) 事务管理器 (TM) 和 (局部) 资源管理器 (RM) 之间的接口。本地的数据库如 mysql 在 XA 中扮演的是 RM 角色 XA 一共分为两阶段： 第一阶段（prepare）：即所有的参与者 RM 准备执行事务并锁住需要的资源。参与者 ready 时，向 TM 报告已准备就绪。 第二阶段 (commit/rollback)：当事务管理者 (TM) 确认所有参与者 (RM) 都 ready 后，向所有参与者发送 commit 命令。 目前主流的数据库基本都支持 XA...</div><div class="meta footer"><span><a href="/categories/backend/%E5%88%86%E5%B8%83%E5%BC%8F%E4%BA%8B%E5%8A%A1/%E4%BA%8B%E5%8A%A1%E6%A8%A1%E5%BC%8F/" itemprop="url" title="事务模式"><i class="ic i-flag"></i>事务模式</a></span></div><a href="/2021/d0caa7cb6848/" itemprop="url" title="分布式事务：DTM XA模式" class="btn">more...</a></div></article><article class="item"><div class="cover"><a href="/2021/ddd8b3452e91/" itemprop="url" title="分布式事务：DTM TCC模式"><img data-src="https://tva2.sinaimg.cn/mw690/6833939bly1gipexj2jgzj20zk0m8b09.jpg"></a></div><div class="info"><div class="meta"><span class="item" title="创建时间：2021-09-30 12:11:46"><span class="icon"><i class="ic i-calendar"></i> </span><time itemprop="dateCreated datePublished" datetime="2021-09-30T12:11:46+08:00">2021-09-30</time> </span><span class="item" title="本文字数"><span class="icon"><i class="ic i-pen"></i> </span><span>3.6k</span> <span class="text">字</span> </span><span class="item" title="阅读时长"><span class="icon"><i class="ic i-clock"></i> </span><span>3 分钟</span></span></div><h3><a href="/2021/ddd8b3452e91/" itemprop="url" title="分布式事务：DTM TCC模式">分布式事务：DTM TCC模式</a></h3><div class="excerpt"># TCC 事务模式 什么是 TCC，TCC 是 Try、Confirm、Cancel 三个词语的缩写，最早是由 Pat Helland 于 2007 年发表的一篇名为《Life beyond Distributed Transactions:an Apostate’s Opinion》的论文提出。 # TCC 组成 TCC 分为 3 个阶段 Try 阶段：尝试执行，完成所有业务检查（一致性）, 预留必须业务资源（准隔离性） Confirm 阶段：如果所有分支的 Try 都成功了，则走到 Confirm 阶段。Confirm 真正执行业务，不作任何业务检查，只使用 Try...</div><div class="meta footer"><span><a href="/categories/backend/%E5%88%86%E5%B8%83%E5%BC%8F%E4%BA%8B%E5%8A%A1/%E4%BA%8B%E5%8A%A1%E6%A8%A1%E5%BC%8F/" itemprop="url" title="事务模式"><i class="ic i-flag"></i>事务模式</a></span></div><a href="/2021/ddd8b3452e91/" itemprop="url" title="分布式事务：DTM TCC模式" class="btn">more...</a></div></article><article class="item"><div class="cover"><a href="/2021/22f84f93ed46/" itemprop="url" title="分布式事务：DTM 二阶段消息模式"><img data-src="https://tva2.sinaimg.cn/mw690/6833939bly1gipeuibk9fj20zk0m8ay2.jpg"></a></div><div class="info"><div class="meta"><span class="item" title="创建时间：2021-09-29 18:23:12"><span class="icon"><i class="ic i-calendar"></i> </span><time itemprop="dateCreated datePublished" datetime="2021-09-29T18:23:12+08:00">2021-09-29</time> </span><span class="item" title="本文字数"><span class="icon"><i class="ic i-pen"></i> </span><span>3.4k</span> <span class="text">字</span> </span><span class="item" title="阅读时长"><span class="icon"><i class="ic i-clock"></i> </span><span>3 分钟</span></span></div><h3><a href="/2021/22f84f93ed46/" itemprop="url" title="分布式事务：DTM 二阶段消息模式">分布式事务：DTM 二阶段消息模式</a></h3><div class="excerpt"># 二阶段消息 # 概述 本文提出的二阶段消息，可以完美替代现有的事务消息或本地消息表架构。 下面我们以跨行转账作为例子，给大家详解这种新架构。业务场景介绍如下： 我们需要跨行从 A 转给 B 30 元，我们先进行可能失败的转出操作 TransOut，即进行 A 扣减 30 元。如果 A 因余额不足扣减失败，那么转账直接失败，返回错误；如果扣减成功，那么进行下一步转入操作，因为转入操作没有余额不足的问题，可以假定转入操作一定会成功。 # HTTP 接入 二阶段消息完成上述任务的核心代码如下所示： msg := dtmcli.NewMsg(DtmServer,...</div><div class="meta footer"><span><a href="/categories/backend/%E5%88%86%E5%B8%83%E5%BC%8F%E4%BA%8B%E5%8A%A1/%E4%BA%8B%E5%8A%A1%E6%A8%A1%E5%BC%8F/" itemprop="url" title="事务模式"><i class="ic i-flag"></i>事务模式</a></span></div><a href="/2021/22f84f93ed46/" itemprop="url" title="分布式事务：DTM 二阶段消息模式" class="btn">more...</a></div></article></div></div><nav class="pagination"><div class="inner"><span class="page-number current">1</span><a class="page-number" href="/page/2/">2</a><a class="extend next" rel="next" href="/page/2/"><i class="ic i-angle-right" aria-label="下一页"></i></a></div></nav></div><div id="sidebar"><div class="inner"><div class="panels"><div class="inner"><div class="contents panel pjax" data-title="文章目录"></div><div class="related panel pjax" data-title="系列文章"></div><div class="overview panel" data-title="站点概览"><div class="author" itemprop="author" itemscope itemtype="http://schema.org/Person"><img class="image" itemprop="image" alt="PPYYLEE" 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