首先Seata1.2.0版本不在自帶sql，且在file.conf文件中沒有了vgroup_mapping.fsp_tx_group =“default” 這項配置

數據庫SQL

seata數據庫 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`)

);

在其它使用seata的數據庫中建undo_log表 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;

修改file.conf

將mode改為db

修改數據庫為自己的地址和用戶名密碼

## transaction log store, only used in seata-server

store {

## store mode: file、db

mode = "db"

## file store property

file {

## store location dir

dir = "sessionStore"

# branch session size , if exceeded first try compress lockkey, still exceeded throws exceptions

maxBranchSessionSize = 16384

# globe session size , if exceeded throws exceptions

maxGlobalSessionSize = 512

# file buffer size , if exceeded allocate new buffer

fileWriteBufferCacheSize = 16384

# when recover batch read size

sessionReloadReadSize = 100

# async, sync

flushDiskMode = async

}

## database store property

db {

## the implement of javax.sql.DataSource, such as DruidDataSource(druid)/BasicDataSource(dbcp) etc.

datasource = "druid"

## mysql/oracle/postgresql/h2/oceanbase etc.

dbType = "mysql"

driverClassName = "com.mysql.jdbc.Driver"

url = "jdbc:mysql://127.0.0.1:3306/seata"

user = "root"

password = "root"

minConn = 5

maxConn = 30

globalTable = "global_table"

branchTable = "branch_table"

lockTable = "lock_table"

queryLimit = 100

maxWait = 5000

}

}

修改file.conf.example

更改的內容與file.conf一致

transport {

# tcp udt unix-domain-socket

type = "TCP"

#NIO NATIVE

server = "NIO"

#enable heartbeat

heartbeat = true

# the client batch send request enable

enableClientBatchSendRequest = false

#thread factory for netty

threadFactory {

bossThreadPrefix = "NettyBoss"

workerThreadPrefix = "NettyServerNIOWorker"

serverExecutorThreadPrefix = "NettyServerBizHandler"

shareBossWorker = false

clientSelectorThreadPrefix = "NettyClientSelector"

clientSelectorThreadSize = 1

clientWorkerThreadPrefix = "NettyClientWorkerThread"

# netty boss thread size,will not be used for UDT

bossThreadSize = 1

#auto default pin or 8

workerThreadSize = "default"

}

shutdown {

# when destroy server, wait seconds

wait = 3

}

serialization = "seata"

compressor = "none"

}

## transaction log store, only used in server side

store {

## store mode: file、db

mode = "db"

## file store property

file {

## store location dir

dir = "sessionStore"

# branch session size , if exceeded first try compress lockkey, still exceeded throws exceptions

maxBranchSessionSize = 16384

# globe session size , if exceeded throws exceptions

maxGlobalSessionSize = 512

# file buffer size , if exceeded allocate new buffer

fileWriteBufferCacheSize = 16384

# when recover batch read size

sessionReloadReadSize = 100

# async, sync

flushDiskMode = async

}

## database store property

db {

## the implement of javax.sql.DataSource, such as DruidDataSource(druid)/BasicDataSource(dbcp) etc.

datasource = "druid"

## mysql/oracle/postgresql/h2/oceanbase etc.

dbType = "mysql"

driverClassName = "com.mysql.jdbc.Driver"

url = "jdbc:mysql://127.0.0.1:3306/seata"

user = "root"

password = "root"

minConn = 5

maxConn = 30

globalTable = "global_table"

branchTable = "branch_table"

lockTable = "lock_table"

queryLimit = 100

}

}

## server configuration, only used in server side

server {

recovery {

#schedule committing retry period in milliseconds

committingRetryPeriod = 1000

#schedule asyn committing retry period in milliseconds

asynCommittingRetryPeriod = 1000

#schedule rollbacking retry period in milliseconds

rollbackingRetryPeriod = 1000

#schedule timeout retry period in milliseconds

timeoutRetryPeriod = 1000

}

undo {

logSaveDays = 7

#schedule delete expired undo_log in milliseconds

logDeletePeriod = 86400000

}

#unit ms,s,m,h,d represents milliseconds, seconds, minutes, hours, days, default permanent

maxCommitRetryTimeout = "-1"

maxRollbackRetryTimeout = "-1"

rollbackRetryTimeoutUnlockEnable = false

}

## metrics configuration, only used in server side

metrics {

enabled = false

registryType = "compact"

# multi exporters use comma divided

exporterList = "prometheus"

exporterPrometheusPort = 9898

}

修改registry.conf

將type修改為nacos

修改serverAddr為localhost:8848;默認為localhsot

registry {

# file 、nacos 、eureka、redis、zk、consul、etcd3、sofa

type = "nacos"

nacos {

application = "seata-server"

serverAddr = "localhost:8848"

namespace = ""

cluster = "default"

username = ""

password = ""

}

eureka {

serviceUrl = "http://localhost:8761/eureka"

application = "default"

weight = "1"

}

redis {

serverAddr = "localhost:6379"

db = 0

password = ""

cluster = "default"

timeout = 0

}

zk {

cluster = "default"

serverAddr = "127.0.0.1:2181"

sessionTimeout = 6000

connectTimeout = 2000

username = ""

password = ""

}

consul {

cluster = "default"

serverAddr = "127.0.0.1:8500"

}

etcd3 {

cluster = "default"

serverAddr = "http://localhost:2379"

}

sofa {

serverAddr = "127.0.0.1:9603"

application = "default"

region = "DEFAULT_ZONE"

datacenter = "DefaultDataCenter"

cluster = "default"

group = "SEATA_GROUP"

addressWaitTime = "3000"

}

file {

name = "file.conf"

}

}

config {

# file、nacos 、apollo、zk、consul、etcd3

type = "file"

nacos {

serverAddr = "localhost"

namespace = ""

group = "SEATA_GROUP"

username = ""

password = ""

}

consul {

serverAddr = "127.0.0.1:8500"

}

apollo {

appId = "seata-server"

apolloMeta = "http://192.168.1.204:8801"

namespace = "application"

}

zk {

serverAddr = "127.0.0.1:2181"

sessionTimeout = 6000

connectTimeout = 2000

username = ""

password = ""

}

etcd3 {

serverAddr = "http://localhost:2379"

}

file {

name = "file.conf"

}

}

啟動Seata(之前得先啟動Nacos)

直接閃退

原因：找不到logback.xml配置log文件或目錄

解決： 修改logback.xml文件

將${user.home}寫為固定地址

修改前：

修改后：

報錯：java.sql.SQLException: Could not retrieve transation read-only status server

解決

一、查看mysql的事務隔離級別 SHOW VARIABLES LIKE '%iso%';

二、將隔離級別改為READ-COMMITTED SET GLOBAL transaction_isolation='READ-COMMITTED';

再次啟動Seata 報錯：

ERROR[main]com.alibaba.druid.pool.DruidDataSource.init:878 -init datasource error, url: jdbc:mysql://127.0.0.1:3306/seata java.sql.SQLException: The server time zone value '?й???????' is unrecognized or represents more than one time zone. You must configure either the server or JDBC driver (via the 'serverTimezone' configuration property) to use a more specifc time zone value if you want to utilize time zone support.

解決：修改file.conf 和 file.conf.example 在url后要加上serverTimezone

修改前： url = "jdbc:mysql://127.0.0.1:3306/seata"

修改后： url = "jdbc:mysql://127.0.0.1:3306/seata?serverTimezone=GMT%2B8"

注意：如果使用的是mysql8版本以上，還需將修改driverClassName

修改前： driverClassName = "com.mysql.jdbc.Driver"

修改后： driverClassName = "com.mysql.cj.jdbc.Driver"

環境準備完成，開擼

POM(版本信息在父POM已經定義好，都是目前位置最新版本)

com.alibaba.cloudgroupId>

spring-cloud-starter-alibaba-seataartifactId>

io.seatagroupId>

seata-allartifactId>

exclusion>

io.seatagroupId>

seata-spring-boot-starterartifactId>

exclusion>

exclusions>

dependency>

io.seatagroupId>

seata-spring-boot-starterartifactId>

1.2.0version>

dependency>

com.alibabagroupId>

druidartifactId>

1.1.22version>

dependency>

com.alibaba.cloudgroupId>

spring-cloud-alibaba-nacos-discoveryartifactId>

dependency>

org.springframework.cloudgroupId>

spring-cloud-starter-openfeignartifactId>

dependency>

org.springframework.bootgroupId>

spring-boot-starter-webartifactId>

dependency>

org.springframework.bootgroupId>

spring-boot-starter-actuatorartifactId>

dependency>

org.springframework.bootgroupId>

spring-boot-devtoolsartifactId>

dependency>

org.springframework.bootgroupId>

spring-boot-starter-data-jdbcartifactId>

dependency>

org.mybatis.spring.bootgroupId>

mybatis-spring-boot-starterartifactId>

dependency>

mysqlgroupId>

mysql-connector-javaartifactId>

dependency>

org.projectlombokgroupId>

lombokartifactId>

dependency>

dependencies>

YAML

server:

port: 9001

spring:

application:

name: cloud-seata-order

cloud:

nacos:

discovery:

server-addr: localhost:8848

datasource:

type: com.alibaba.druid.pool.DruidDataSource

username: root

password: root

url: jdbc:mysql://127.0.0.1:3306/order?useUnicode=true&characterEncoding=UTF-8&useSSL=false&serverTimezone=GMT%2B8

driver-class-name: com.mysql.cj.jdbc.Driver

management:

endpoints:

web:

exposure:

include: '*'

mybatis:

mapper-locations: classpath:mapper/*.xml

seata:

application-id: ${spring.application.name}

tx-service-group: default

service:

vgroupMapping:

default: default

grouplist:

default: 127.0.0.1:8091

ribbon:

ReadTimeout: 6000

ConnectTimout: 6000

主啟動

import org.springframework.boot.SpringApplication;

import org.springframework.boot.autoconfigure.SpringBootApplication;

import org.springframework.cloud.client.discovery.EnableDiscoveryClient;

import org.springframework.cloud.openfeign.EnableFeignClients;

@SpringBootApplication

@EnableFeignClients

@EnableDiscoveryClient

public class OrderSeataMain9001 {

public static void main(String[] args) {

SpringApplication.run(OrderSeataMain9001.class,args);

}

}

目錄結構

其它的微服務模塊和代碼就不再贅述，order --> storage --> account {訂單 庫存 賬戶(余額)}

啟動Order應用：

報錯：no available service ‘null’ found, please make sure registry config correct

將依賴的seata-spring-boot-starter排除(前面的POM已經是修改過后的)

再導入seata-spring-boot-starter

com.alibaba.cloudgroupId>

spring-cloud-starter-alibaba-seataartifactId>

io.seatagroupId>

seata-allartifactId>

exclusion>

io.seatagroupId>

seata-spring-boot-starterartifactId>

exclusion>

exclusions>

dependency>

io.seatagroupId>

seata-spring-boot-starterartifactId>

1.2.0version>

dependency>

且YAML為(前面的YAML已經是修改后的，這里只是闡述問題)

在新版中vgroup-mappging改為了vgroupMapping駝峰命名

且此處Key對應 tx-service-group 的 Value, 此處 value 默認 default

如果不指定grouplist

報如下錯：java.lang.IllegalArgumentException: defalut.grouplist is required

seata:

application-id: ${spring.application.name}

tx-service-group: default

service:

vgroupMapping:

default: default

grouplist:

default: 127.0.0.1:8091

第二個問題：

Cause: java.sql.SQLException: com.alibaba.fescar.core.exception.TransactionException: RPC Timeout

問題描述：之前我是連的遠程阿里云服務器的mysql，在調用的出現RPC Timeout異常

@Service

public class OrderServiceImpl implements OrderService {

@Resource

private OrderDao orderDao;

@Resource

private AccountService accountService;

@Resource

private StorageService storageService;

@Override

@GlobalTransactional(name = "default",rollbackFor = Exception.class)

public void create(@RequestParam Order order) {

orderDao.create(order);

accountService.accountDecease(order.getUserId(),order.getMoney()*order.getCount());

int i = 10/0;

storageService.storageDecease(order.getCommodityCode(),order.getCount());

}

}

這里寫了int i = 10 / 0;的一個異常調用時出現RPC Timeout異常，而去掉int i = 10/0后 調用正常；

這里的解決方法就是YAML為ribbon設置超時時間后訪問成功by /zero，且事務回滾正常：

ribbon:

ReadTimeout: 6000

ConnectTimout: 6000

而這個問題比較奇怪的是，我把mysql切換到本地的mysql后，就沒有RPC Timeout異常；

且我的阿里云服務器訪問正常，不存在網絡差的情況

最后附上使用AT模式的注意事項(來源：官網)

使用 AT 模式需要的注意事項有哪些 ？

1.必須使用代理數據源，有 3 種形式可以代理數據源：

依賴 seata-spring-boot-starter 時，自動代理數據源，無需額外處理。

依賴 seata-all 時，使用 @EnableAutoDataSourceProxy (since 1.1.0) 注解，注解參數可選擇 jdk 代理或者 cglib 代理。

依賴 seata-all 時，也可以手動使用 DatasourceProxy 來包裝 DataSource。

2.配置 GlobalTransactionScanner，使用 seata-all 時需要手動配置，使用 seata-spring-boot-starter 時無需額外處理。

3.業務表中必須包含單列主鍵，若存在復合主鍵，請參考問題 13 。

4.每個業務庫中必須包含 undo_log 表，若與分庫分表組件聯用，分庫不分表。

5.跨微服務鏈路的事務需要對相應 RPC 框架支持，目前 seata-all 中已經支持：Apache Dubbo、Alibaba Dubbo、sofa-RPC、Motan、gRpc、httpClient，對于 Spring Cloud 的支持，請大家引用 spring-cloud-alibaba-seata。其他自研框架、異步模型、消息消費事務模型請結合 API 自行支持。

6.目前AT模式支持的數據庫有：MySQL、Oracle、PostgreSQL和 TiDB。

7.使用注解開啟分布式事務時，若默認服務 provider 端加入 consumer 端的事務，provider 可不標注注解。但是，provider 同樣需要相應的依賴和配置，僅可省略注解。

8.使用注解開啟分布式事務時，若要求事務回滾，必須將異常拋出到事務的發起方，被事務發起方的 @GlobalTransactional 注解感知到。provide 直接拋出異常 或 定義錯誤碼由 consumer 判斷再拋出異常。

總結

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