seata-1.4.0安装及使用

1、简介

Seata 是一款开源的分布式事务解决方案，致力于提供高性能和简单易用的分布式事务服务。Seata 将为用户提供了 AT、TCC、SAGA 和 XA 事务模式，为用户打造一站式的分布式解决方案。
详见官方文档：https://seata.io/zh-cn/docs/overview/what-is-seata.html
网上的多是0.9.0版本的安装方式，这里记录安装seata-1.4.0版本的方式，在win10环境下安装，centos7与此相同。

下载

需要下载seata-1.4.0.zip 和 seata-server-1.4.0.zip两个安装包
下载地址：https://github.com/seata/seata/releases

2.1、seata-server-1.4.0

安装配置

解压压缩包，修改conf内的配置文件

2.1.1、registry.conf修改：

我使用的nacos作为配置中心和注册中心，使用将配置文件改为nacosregistry {# file 、nacos 、eureka、redis、zk、consul、etcd3、sofa type = "nacos" loadBalance = "RandomLoadBalance" loadBalanceVirtualNodes = 10 nacos { application = "seata-server" serverAddr = "127.0.0.1:8848" group = "SEATA_GROUP" namespace = "" cluster = "default" username = "nacos" password = "nacos" }}config { # file、nacos 、apollo、zk、consul、etcd3 type = "nacos" nacos { serverAddr = "127.0.0.1:8848" namespace = "" group = "SEATA_GROUP" username = "nacos" password = "nacos" }}

2.1.2、file.conf修改：

修改数据库地址，注意mysql5/mysql8驱动不同store { ## store mode: file、db、redis mode = "db" ## database store property db { ## the implement of javax.sql.DataSource, such as DruidDataSource(druid)/BasicDataSource(dbcp)/HikariDataSource(hikari) etc. datasource = "druid" ## mysql/oracle/postgresql/h2/oceanbase etc. dbType = "mysql" driverClassName = "com.mysql.cj.jdbc.Driver" url = "jdbc:mysql://127.0.0.1:3307/seata?serverTimezone=Asia/Shanghai&useUnicode=true&characterEncoding=utf8&useSSL=true" user = "root" password = "123456" minConn = 5 maxConn = 100 globalTable = "global_table" branchTable = "branch_table" lockTable = "lock_table" queryLimit = 100 maxWait = 5000 } }

2.1.3、创建数据库

创建数据库seata,并建立下面三张表（branch_table, global_table, lock_table），创建undo_log表放到业务库中-- the table to store GlobalSession datadrop table if exists `global_table`;create table `global_table` ( `xid` varchar(128) not null, `transaction_id` bigint, `status` tinyint not null, `application_id` varchar(32), `transaction_service_group` varchar(32), `transaction_name` varchar(128), `timeout` int, `begin_time` bigint, `application_data` varchar(2000), `gmt_create` datetime, `gmt_modified` datetime, primary key (`xid`), key `idx_gmt_modified_status` (`gmt_modified`, `status`), key `idx_transaction_id` (`transaction_id`)); -- the table to store BranchSession datadrop table if exists `branch_table`;create table `branch_table` ( `branch_id` bigint not null, `xid` varchar(128) not null, `transaction_id` bigint , `resource_group_id` varchar(32), `resource_id` varchar(256) , `lock_key` varchar(128) , `branch_type` varchar(8) , `status` tinyint, `client_id` varchar(64), `application_data` varchar(2000), `gmt_create` datetime, `gmt_modified` datetime, primary key (`branch_id`), key `idx_xid` (`xid`)); -- the table to store lock datadrop table if exists `lock_table`;create table `lock_table` ( `row_key` varchar(128) not null, `xid` varchar(96), `transaction_id` long , `branch_id` long, `resource_id` varchar(256) , `table_name` varchar(32) , `pk` varchar(36) , `gmt_create` datetime , `gmt_modified` datetime, primary key(`row_key`)); -- the table to store seata xid data-- 0.7.0+ add context-- you must to init this sql for you business databese. the seata server not need it.-- 此脚本必须初始化在你当前的业务数据库中，用于AT 模式XID记录。与server端无关（注：业务数据库）-- 注意此处0.3.0+ 增加唯一索引 ux_undo_logdrop table `undo_log`;CREATE TABLE `undo_log` ( `id` bigint(20) NOT NULL AUTO_INCREMENT, `branch_id` bigint(20) NOT NULL, `xid` varchar(100) NOT NULL, `context` varchar(128) NOT NULL, `rollback_info` longblob NOT NULL, `log_status` int(11) NOT NULL, `log_created` datetime NOT NULL, `log_modified` datetime NOT NULL, `ext` varchar(100) DEFAULT NULL, PRIMARY KEY (`id`), UNIQUE KEY `ux_undo_log` (`xid`,`branch_id`)) ENGINE=InnoDB AUTO_INCREMENT=1 DEFAULT CHARSET=utf8;

2.1.4、启动

seata-1.4\bin目录下：双击 seata-server.batnacos中查看服务是否注册成功

2.2 seata-1.4.0.

配置

解压安装包，并修改配置

2.2.3 修改config.txt

路径：script\config-center修改service.vgroupMapping和数据库地址service.vgroupMapping.system-server-group=default service.vgroupMapping.product-server-group=defaultstore.mode=dbstore.db.datasource=druidstore.db.dbType=mysqlstore.db.driverClassName=com.mysql.cj.jdbc.Driverstore.db.url=jdbc:mysql://192.168.111.130:3307/seata?serverTimezone=Asia/Shanghai&useUnicode=true&characterEncoding=utf8&useSSL=truestore.db.user=rootstore.db.password=123456store.db.minConn=5store.db.maxConn=30store.db.globalTable=global_tablestore.db.branchTable=branch_tablestore.db.queryLimit=100store.db.lockTable=lock_tablestore.db.maxWait=5000注：service.vgroupMapping.system-server-group=default service.vgroupMapping.product-server-group=default #system-server-group、product-server-group 与项目模块中yml配置的seata.tx-service-group内容相同

2.2.3 启动nacos-config.sh,

将配置注入到nacos中

1、在seata-server-1.4.0\script\config-center\nacos目录下，右键 Git Bash Here

2、输入命令：
sh nacos-config.sh -h 127.0.0.1 -p 8848 -g SEATA_GROUP -u nacos -w nacos

返回成功

2.2.3、nacos中查看配置

在nacos配置列表中找到config.txt配置的vgroupMapping，即说明注入成功
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3、SpringCloud 配置

3.1、pom添加依赖

<dependency> <groupId>com.alibaba.cloud</groupId> <artifactId>spring-cloud-starter-alibaba-seata</artifactId> <exclusions> <exclusion> <groupId>io.seata</groupId> <artifactId>seata-spring-boot-starter</artifactId> </exclusion> </exclusions> </dependency> <dependency> <groupId>io.seata</groupId> <artifactId>seata-spring-boot-starter</artifactId> <version>1.4.0</version> </dependency>注：seata-spring-boot-starter的版本与安装版本一致

3.2、修改yml配置文件

seata: enabled: true application-id: product-server tx-service-group: product-server-group enable-auto-data-source-proxy: true config: type: nacos nacos: namespace: server-addr: 127.0.0.1:8848 group: SEATA_GROUP userName: "nacos" password: "nacos" registry: type: nacos nacos: application: seata-server server-addr: 127.0.0.1:8848 namespace: userName: "nacos" password: "nacos"

3.3、代码上添加注解：

application启动类上添加：@EnableAutoDataSourceProxyservice上添加：@GlobalTransactional(rollbackFor = Exception.class)

3.4、启动服务：

控制台输出：

3.5、测试

调用方控制台打印

被调用方异常控制台打印：

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