详解SpringCloud

详解SpringCloud

前言

Seata 是一款阿里巴巴开源的分布式事务解决方案，致力于在微服务架构下提供高性能和简单易用的分布式事务服务。

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。

术语

TC (Transaction Coordinator) - 事务协调者

维护全局和分支事务的状态，驱动全局事务提交或回滚。

TM (Transaction Manager) - 事务管理器

定义全局事务的范围：开始全局事务、提交或回滚全局事务。

RM (Resource Manager) - 资源管理器

管理分支事务处理的资源，与TC交谈以注册分支事务和报告分支事务的状态，并驱动分支事务提交或回滚。

1.

XID:全局唯一事务ID

TC：事务协调器，维护全局事务的运行状态，负责协调并驱动全局的提交或回滚

TM：控制全局事务的边界，负责开启一全局事务，并最终发起全局提交或者回滚的决议

RM：控制分支事务，负责分支注册，状态汇报，并接受事务协调的指令，驱动分支的事务提交或者回滚

2.

TM向TC申请开启一个全局的事务，全局事务创建成功并生成一个唯一的全局ID，XID在微服务调用链路的上下文中传播

RM向TC注册分支事务，将其纳入XID对应事务的 管辖

TM向TC发起针对XID的全局提交或者回滚

TC调度XID下管辖的全部分支事务完成提交或者回滚

官方文档https://seata.io/zh-cn/docs/overview/what-is-seata.html

示例 win版

下载安装

https://github.com/seata/seata/releases/tag/v1.3.0http://

service {

#transaction service group mapping

#修改，可不改,my_test_tx_grou。

vgroup_mapping.my_test_tx_group = "default"

#only support when registry.type=file, please don't set multiple addresses

# 此服务的地址

default.grouplist = "127.0.0.1:8091"

#disable seata

disableGlobalTransaction = false

}

创建数据库 运行官方给的额Sql文件

我草！没有sql脚本， 0.9版本有sql脚本

网上找了一个

DROP TABLE IF EXISTS `branch_table`;

CREATE TABLE `branch_table` (

`branch_id` bigint(20) NOT NULL,

`xid` varchar(128) CHARACTER SET utf8 COLLATE utf8_general_ci NOT NULL,

`transaction_id` bigint(20) NULL DEFAULT NULL,

`resource_group_id` varchar(32) CHARACTER SET utf8 COLLATE utf8_general_ci NULL DEFAULT NULL,

`resource_id` varchar(256) CHARACTER SET utf8 COLLATE utf8_general_ci NULL DEFAULT NULL,

`branch_type` varchar(8) CHARACTER SET utf8 COLLATE utf8_general_ci NULL DEFAULT NULL,

`status` tinyint(4) NULL DEFAULT NULL,

`client_id` varchar(64) CHARACTER SET utf8 COLLATE utf8_general_ci NULL DEFAULT NULL,

`application_data` varchar(2000) CHARACTER SET utf8 COLLATE utf8_general_ci NULL DEFAULT NULL,

`gmt_create` datetime(6) NULL DEFAULT NULL,

`gmt_modified` datetime(6) NULL DEFAULT NULL,

PRIMARY KEY (`branch_id`) USING BTREE,

INDEX `idx_xid`(`xid`) USING BTREE

) ENGINE = InnoDB CHARACTER SET = utf8 COLLATE = utf8_general_ci ROW_FORMAT = Dynamic;

-- ----------------------------

-- Records of branch_table

-- ----------------------------

-- ----------------------------

-- Table structure for global_table

-- ----------------------------

DROP TABLE IF EXISTS `global_table`;

CREATE TABLE `global_table` (

`xid` varchar(128) CHARACTER SET utf8 COLLATE utf8_general_ci NOT NULL,

`transaction_id` bigint(20) NULL DEFAULT NULL,

`status` tinyint(4) NOT NULL,

`application_id` varchar(32) CHARACTER SET utf8 COLLATE utf8_general_ci NULL DEFAULT NULL,

`transaction_service_group` varchar(32) CHARACTER SET utf8 COLLATE utf8_general_ci NULL DEFAULT NULL,

`transaction_name` varchar(128) CHARACTER SET utf8 COLLATE utf8_general_ci NULL DEFAULT NULL,

`timeout` int(11) NULL DEFAULT NULL,

`begin_time` bigint(20) NULL DEFAULT NULL,

`application_data` varchar(2000) CHARACTER SET utf8 COLLATE utf8_general_ci NULL DEFAULT NULL,

`gmt_create` datetime(0) NULL DEFAULT NULL,

`gmt_modified` datetime(0) NULL DEFAULT NULL,

PRIMARY KEY (`xid`) USING BTREE,

INDEX `idx_gmt_modified_status`(`gmt_modified`, `status`) USING BTREE,

INDEX `idx_transaction_id`(`transaction_id`) USING BTREE

) ENGINE = InnoDB CHARACTER SET = utf8 COLLATE = utf8_general_ci ROW_FORMAT = Dynamic;

-- ----------------------------

-- Records of global_table

-- ----------------------------

-- ----------------------------

-- Table structure for lock_table

-- ----------------------------

DROP TABLE IF EXISTS `lock_table`;

CREATE TABLE `lock_table` (

`row_key` varchar(128) CHARACTER SET utf8 COLLATE utf8_general_ci NOT NULL,

`xid` varchar(96) CHARACTER SET utf8 COLLATE utf8_general_ci NULL DEFAULT NULL,

`transaction_id` bigint(20) NULL DEFAULT NULL,

`branch_id` bigint(20) NOT NULL,

`resource_id` varchar(256) CHARACTER SET utf8 COLLATE utf8_general_ci NULL DEFAULT NULL,

`table_name` varchar(32) CHARACTER SET utf8 COLLATE utf8_general_ci NULL DEFAULT NULL,

`pk` varchar(36) CHARACTER SET utf8 COLLATE utf8_general_ci NULL DEFAULT NULL,

`gmt_create` datetime(0) NULL DEFAULT NULL,

`gmt_modified` datetime(xGFtk0) NULL DEFAULT NULL,

PRIMARY KEY (`row_key`) USING BTREE,

INDEX `idx_branch_id`(`branch_id`) USING BTREE

) ENGINE = InnoDB CHARACTER SET = utf8 COLLATE = utf8_general_ci ROW_FORMAT = Dynamic;

-- ----------------------------

-- Records of lock_table

-- ----------------------------

-- ----------------------------

-- Table structure for undo_log

-- ----------------------------

DROP TABLE IF EXISTS `undo_log`;

CREATE TABLE `undo_log` (

`id` bigint(20) NOT NULL AUTO_INCREMENT,

`branch_id` bigint(20) NOT NULL,

`xid` varchar(100) CHARACTER SET utf8 COLLATE utf8_general_ci NOT NULL,

`context` varchar(128) CHARACTER SET utf8 COLLATE utf8_general_ci NOT NULL,

`rollback_info` longblob NOT NULL,

`log_status` int(11) NOT NULL,

`log_created` datetime(0) NOT NULL,

`log_modified` datetime(0) NOT NULL,

`ext` varchar(100) CHARACTER SET utf8 COLLATE utf8_general_ci NULL DEFAULT NULL,

PRIMARY KEY (`id`) USING BTREE,

UNIQUE INDEX `ux_undo_log`(`xid`, `branch_id`) USING BTREE

) ENGINE = InnoDB AUTO_INCREMENT = 1 CHARACTER SET = utf8 COLLATE = utf8_general_ci ROW_FORMAT = Dynamic;

com.alibaba.cloud

spring-cloud-starter-alibaba-seata

seata-all

io.seata

io.seata

seata-all

1.3.0

使用库下创建`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;

yml

server:

port: 2001

spring:

application:

name: seata-order-service

cloud:

alibaba:

seata:

#自定义事务组名称需要与seata-server中的对应

tx-service-group: default

nacos:

discovery:

server-addr: localhost:8848

datasource:

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

url: jdbc:mysql://localhost:3306/seata_order

username: root

password: root

feign:

hystrix:

enabled: false

logging:

level:

io:

seata: info

mybatis:

mapperLocations: classpath:mapper/*.xml

file.conf

transport {

# tcp udt unix-domain-socket

type = "TCP"

#NIO NATIVE

server = "NIO"

#enable heartbeat

heartbeat = true

#thread factory for netty

thread-factory {

boss-thread-prefix = "NettyBoss"

worker-thread-prefix = "NettyServerNIOWorker"

server-executor-thread-prefix = "NettyServerBizHandler"

share-boss-worker = false

client-selector-thread-prefix = "NettyClientSelector"

client-selector-thread-size = 1

client-worker-thread-prefix = "NettyClientWorkerThread"

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

boss-thread-size = 1

#auto default pin or 8

worker-thread-size = 8

}

shutdown {

# when destroy server, wait seconds

wait = 3

}

serialization = "seata"

compressor = "none"

}

service {

vgroup_mapping.fsp_tx_group = "default"

default.grouplist = "127.0.0.1:8091"

enableDegrade = false

disable = false

max.commit.retry.timeout = "-1"

max.rollback.retry.timeout = "-1"

disableGlobalTransaction = false

}

client {

async.commit.buffer.limit = 10000

lock {

retry.internal = 10

retry.times = 30

}

report.retry.count = 5

tm.commit.retry.count = 1

tm.rollback.retry.count = 1

}

## transaction log store

store {

## store mode: file、db

mode = "db"

## file store

file {

dir = "sessionStore"

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

max-branch-session-size = 16384

# globe session size , if exceeded throws exceptions

max-global-session-size = 512

# file buffer size , if exceeded allocate new buffer

file-write-buffer-cache-size = 16384

# when recover batch read size

session.reload.read_size = 100

# async, sync

flush-disk-mode = async

}

## database store

db {

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

datasource = "dbcp"

## mysql/oracle/h2/oceanbase etc.

db-type = "mysql"

driver-class-name = "com.mysql.jdbc.Driver"

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

user = "root"

password = "root"

min-conn = 1

max-conn = 3

global.table = "global_table"

branch.table = "branch_table"

lock-table = "lock_table"

query-limit = 100

}

}

lock {

## the lock store mode: local、remote

mode = "remote"

local {

## store locks in user's database

}

remote {

## store locks in the seata's server

}

}

recovery {

#schedule committing retry period in milliseconds

committing-retry-period = 1000

#schedule asyn committing retry period in milliseconds

asyn-committing-retry-period = 1000

#schedule rollbacking retry period in milliseconds

rollbacking-retry-period = 1000

#schedule timeout retry period in milliseconds

timeout-retry-period = 1000

}

transaction {

undo.data.validation = true

undo.log.serialization = "jackson"

undo.log.save.days = 7

#schedule delete expired undo_log in milliseconds

undo.log.delete.period = 86400000

undo.log.table = "undo_log"

}

## metrics settings

metrics {

enabled = false

registry-type = "compact"

# multi exporters use comma divided

exporter-list = "prometheus"

exporter-prometheus-port = 9898

}

support {

## spring

spring {

# auto proxy the DataSource bean

datasource.autoproxy = false

}

}

registry.conf

registry {

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

type = "nacos"

nacos {

serverAddr = "localhost:8848"

namespace = ""

cluster = "default"

}

eureka {

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

application = "default"

weight = "1"

}

redis {

serverAddr = "localhost:6379"

db = "0"

}

zk {

cluster = "default"

serverAddr = "127.0.0.1:2181"

session.timeout = 6000

connect.timeout = 2000

}

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 = ""

}

consul {

serverAddr = "127.0.0.1:8500"

}

apollo {

app.id = "seata-server"

apollo.meta = "http://192.168.1.204:8801"

}

zk {

serverAddr = "127.0.0.1:2181"

session.timeout = 6000

connect.timeout = 2000

}

etcd3 {

serverAddr = "http://localhost:2379"

}

file {

name = "file.conf"

}

}

@GlobalTransactional(name = "tang,rollbackFor = Exception.class)开启全局事物

@Override

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

public void create(Providers providers ){

test1Mapper.add(providers);

test2Mapper.add(providers)

}

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