seata-1.4.0安装及在springcloud中使用详解

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nacos

registry {
# 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 data
drop 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 data
drop 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 data
drop 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_log
drop 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.bat
nacos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=default
store.mode=db
store.db.datasource=druid
store.db.dbType=mysql
store.db.driverClassName=com.mysql.cj.jdbc.Driver
store.db.url=jdbc:mysql://192.168.111.130:3307/seata?serverTimezone=Asia/Shanghai&useUnicode=true&characterEncoding=utf8&useSSL=true
store.db.user=root
store.db.password=123456
store.db.minConn=5
store.db.maxConn=30
store.db.globalTable=global_table
store.db.branchTable=branch_table
store.db.queryLimit=100
store.db.lockTable=lock_table
store.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
![在这里插入图片描述](https://img-blog.csdnimg.cn/20201214150808987.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl8zNzY5ODMzNg==,size_16,color_FFFFFF,t_70#pic_center

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：
@EnableAutoDataSourceProxy
service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：

来源：https://blog.csdn.net/weixin_37698336/article/details/111170580