springboot整合seata1.4.0【完成】

本文转载自查看原文 2021-12-01 20:20 1232 分布式

一、简介

本文主要介绍分布式事务框架seata（seata版本1.4.0）的安装以及springboot与seata的整合的事务回滚案例；
seata的官方文档路径： http://seata.io/zh-cn/
本文介绍的方式是AT模式，采用的中间件是nacos，存储类型为db模式；
本文默认你已会nacos的安装，如果不会请移步nacos的官方文档进行搭建；

二、seata服务端安装

2.1 seata-server服务端

2.1.1 下载seata-server服务端

本文介绍的是window版本的安装；
当前最新版本为1.4.0,选择binary类型的点击下载即可；
下载路径： http://seata.io/zh-cn/blog/download.html ；
下载下来进行解压，目录结构如下：

2.1.2 添加log文件

在根目录创建logs文件夹，里面创建一个seata_gc.log的文件，结构如下：

2.2 初始化数据库

2.2.1 seata库数据表

数据库名称就叫seata;

branch_table表

CREATE TABLE branch_table (
branch_id bigint(20) NOT NULL,
xid varchar(128) NOT NULL,
transaction_id bigint(20) DEFAULT NULL,
resource_group_id varchar(32) DEFAULT NULL,
resource_id varchar(256) DEFAULT NULL,
branch_type varchar(8) DEFAULT NULL,
status tinyint(4) DEFAULT NULL,
client_id varchar(64) DEFAULT NULL,
application_data varchar(2000) DEFAULT NULL,
gmt_create datetime(6) DEFAULT NULL,
gmt_modified datetime(6) DEFAULT NULL,
PRIMARY KEY (branch_id),
KEY idx_xid (xid)
) ENGINE=InnoDB DEFAULT CHARSET=utf8;

global_table表

CREATE TABLE global_table (
xid varchar(128) NOT NULL,
transaction_id bigint(20) DEFAULT NULL,
status tinyint(4) NOT NULL,
application_id varchar(32) DEFAULT NULL,
transaction_service_group varchar(32) DEFAULT NULL,
transaction_name varchar(128) DEFAULT NULL,
timeout int(11) DEFAULT NULL,
begin_time bigint(20) DEFAULT NULL,
application_data varchar(2000) DEFAULT NULL,
gmt_create datetime DEFAULT NULL,
gmt_modified datetime DEFAULT NULL,
PRIMARY KEY (xid),
KEY idx_gmt_modified_status (gmt_modified,status),
KEY idx_transaction_id (transaction_id)
) ENGINE=InnoDB DEFAULT CHARSET=utf8;

lock_table表

CREATE TABLE lock_table (
row_key varchar(128) NOT NULL,
xid varchar(96) DEFAULT NULL,
transaction_id bigint(20) DEFAULT NULL,
branch_id bigint(20) NOT NULL,
resource_id varchar(256) DEFAULT NULL,
table_name varchar(32) DEFAULT NULL,
pk varchar(36) DEFAULT NULL,
gmt_create datetime DEFAULT NULL,
gmt_modified datetime DEFAULT NULL,
PRIMARY KEY (row_key),
KEY idx_branch_id (branch_id)
) ENGINE=InnoDB DEFAULT CHARSET=utf8;

2.2.2 业务库表

seata需要在每个业务库添加一张undo_log表

undo_log表

CREATE TABLE undo_log (
branch_id bigint(20) NOT NULL COMMENT 'branch transaction id',
xid varchar(100) NOT NULL COMMENT 'global transaction id',
context varchar(128) NOT NULL COMMENT 'undo_log context,such as serialization',
rollback_info longblob NOT NULL COMMENT 'rollback info',
log_status int(11) NOT NULL COMMENT '0:normal status,1:defense status',
log_created datetime(6) NOT NULL COMMENT 'create datetime',
log_modified datetime(6) NOT NULL COMMENT 'modify datetime',
UNIQUE KEY ux_undo_log (xid,branch_id)
) ENGINE=InnoDB DEFAULT CHARSET=utf8 COMMENT='AT transaction mode undo table';

2.3 修改file.conf文件

2.3.1 信息

只需要修改模式为db和数据库链接信息即可，如下图：

2.3.2 修改内容

store.mode = db;
store.db.url = jdbc:mysql://ip:port/seata;
store.db.user = 账号
store.db.password = 密码

2.4 修改registry.conf文件

2.4.1 信息

只需要修改注册类型和配置类型均为nacos和nacos的相关信息即可

2.4.2 修改内容

registry.type = nacos
registry.nacos.application = seata-server, 默认服务端的名称
registry.nacos.serverAddr = nacos服务器的8848端口地址
registry.nacos.group = SEATA_GROUP, 默认seata的组
registry.nacos.namespace = seata, 默认seata的配置在nacos的命名空间
registry.nacos.cluster = default, 采取默认集群即可
registry.nacos.username = nacos的用户名
registry.nacos.password = naocs的密码
config.type = nacos
config.nacos.namespace = seata, 默认seata的配置在nacos的命名空间
config.nacos.group = SEATA_GROUP, 默认seata的组
config.nacos.username = nacos的用户名
config.nacos.password = naocs的密码

2.5 修改context.txt文件

2.5.1 context.txt文件内容

在/seata根目录下创建config.txt文件，内容如下：
transport.type=TCP
transport.server=NIO
transport.heartbeat=true
transport.enableClientBatchSendRequest=false
transport.threadFactory.bossThreadPrefix=NettyBoss
transport.threadFactory.workerThreadPrefix=NettyServerNIOWorker
transport.threadFactory.serverExecutorThreadPrefix=NettyServerBizHandler
transport.threadFactory.shareBossWorker=false
transport.threadFactory.clientSelectorThreadPrefix=NettyClientSelector
transport.threadFactory.clientSelectorThreadSize=1
transport.threadFactory.clientWorkerThreadPrefix=NettyClientWorkerThread
transport.threadFactory.bossThreadSize=1
transport.threadFactory.workerThreadSize=default
transport.shutdown.wait=3
service.vgroupMapping.my_test_tx_group=default
service.default.grouplist=127.0.0.1:8091
service.enableDegrade=false
service.disableGlobalTransaction=false
client.rm.asyncCommitBufferLimit=10000
client.rm.lock.retryInterval=10
client.rm.lock.retryTimes=30
client.rm.lock.retryPolicyBranchRollbackOnConflict=true
client.rm.reportRetryCount=5
client.rm.tableMetaCheckEnable=false
client.rm.tableMetaCheckerInterval=60000
client.rm.sqlParserType=druid
client.rm.reportSuccessEnable=false
client.rm.sagaBranchRegisterEnable=false
client.tm.commitRetryCount=5
client.tm.rollbackRetryCount=5
client.tm.defaultGlobalTransactionTimeout=60000
client.tm.degradeCheck=false
client.tm.degradeCheckAllowTimes=10
client.tm.degradeCheckPeriod=2000
store.mode=db
store.publicKey=
store.file.dir=file_store/data
store.file.maxBranchSessionSize=16384
store.file.maxGlobalSessionSize=512
store.file.fileWriteBufferCacheSize=16384
store.file.flushDiskMode=async
store.file.sessionReloadReadSize=100
store.db.datasource=druid
store.db.dbType=mysql
store.db.driverClassName=com.mysql.jdbc.Driver
store.db.url=jdbc:mysql://IP:poert/seata?useUnicode=true&rewriteBatchedStatements=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
store.redis.mode=single
store.redis.single.host=127.0.0.1
store.redis.single.port=6379
store.redis.maxConn=10
store.redis.minConn=1
store.redis.maxTotal=100
store.redis.database=0
store.redis.password=
store.redis.queryLimit=100
server.recovery.committingRetryPeriod=1000
server.recovery.asynCommittingRetryPeriod=1000
server.recovery.rollbackingRetryPeriod=1000
server.recovery.timeoutRetryPeriod=1000
server.maxCommitRetryTimeout=-1
server.maxRollbackRetryTimeout=-1
server.rollbackRetryTimeoutUnlockEnable=false
client.undo.dataValidation=true
client.undo.logSerialization=jackson
client.undo.onlyCareUpdateColumns=true
server.undo.logSaveDays=7
server.undo.logDeletePeriod=86400000
client.undo.logTable=undo_log
client.undo.compress.enable=true
client.undo.compress.type=zip
client.undo.compress.threshold=64k
log.exceptionRate=100
transport.serialization=seata
transport.compressor=none
metrics.enabled=false
metrics.registryType=compact
metrics.exporterList=prometheus
metrics.exporterPrometheusPort=9898

2.5.2 修改内容

service.vgroupMapping.my_test_tx_group=default
store.mode=db
store.db.url=jdbc:mysql://IP:PORT/seata?useUnicode=true&rewriteBatchedStatements=true
store.db.user=root
store.db.password=123456

2.5.3 添加nacos-config.sh文件

在seata/conf目录下添加nacos-config.sh文件，内容如下：

#!/bin/sh
# Copyright 1999-2019 Seata.io Group.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at、
#
#      http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

while getopts ":h:p:g:t:u:w:" opt
do
  case $opt in
  h)
    host=$OPTARG
    ;;
  p)
    port=$OPTARG
    ;;
  g)
    group=$OPTARG
    ;;
  t)
    tenant=$OPTARG
    ;;
  u)
    username=$OPTARG
    ;;
  w)
    password=$OPTARG
    ;;
  ?)
    echo " USAGE OPTION: $0 [-h host] [-p port] [-g group] [-t tenant] [-u username] [-w password] "
    exit 1
    ;;
  esac
done

if [ -z ${host} ]; then
    host=localhost
fi
if [ -z ${port} ]; then
    port=8848
fi
if [ -z ${group} ]; then
    group="SEATA_GROUP"
fi
if [ -z ${tenant} ]; then
    tenant=""
fi
if [ -z ${username} ]; then
    username=""
fi
if [ -z ${password} ]; then
    password=""
fi

nacosAddr=$host:$port
contentType="content-type:application/json;charset=UTF-8"

echo "set nacosAddr=$nacosAddr"
echo "set group=$group"

urlencode() {
  length="${#1}"
  i=0
  while [ $length -gt $i ]; do
    char="${1:$i:1}"
    case $char in
    [a-zA-Z0-9.~_-]) printf $char ;;
    *) printf '%%%02X' "'$char" ;;
    esac
    i=`expr $i + 1`
  done
}

failCount=0
tempLog=$(mktemp -u)
function addConfig() {
  dataId=`urlencode $1`
  content=`urlencode $2`
  curl -X POST -H "${contentType}" "http://$nacosAddr/nacos/v1/cs/configs?dataId=$dataId&group=$group&content=$content&tenant=$tenant&username=$username&password=$password" >"${tempLog}" 2>/dev/null
  if [ -z $(cat "${tempLog}") ]; then
    echo " Please check the cluster status. "
    exit 1
  fi
  if [ "$(cat "${tempLog}")" == "true" ]; then
    echo "Set $1=$2 successfully "
  else
    echo "Set $1=$2 failure "
    failCount=`expr $failCount + 1`
  fi
}

count=0
for line in $(cat $(dirname "$PWD")/config.txt | sed s/[[:space:]]//g); do
    count=`expr $count + 1`
    key=${line%%=*}
    value=${line#*=}
    addConfig "${key}" "${value}"
done

echo "========================================================================="
echo " Complete initialization parameters,  total-count:$count ,  failure-count:$failCount "
echo "========================================================================="

if [ ${failCount} -eq 0 ]; then
    echo " Init nacos config finished, please start seata-server. "
else
    echo " init nacos config fail. "
fi

2.5.4 将context.txt文件内容上传到nacos

目录结构如下：
在conf文件下执行命令上传配置文件到nacos
此时可以看到nacos上有对应的配置文件信息

2.6 启动服务端seata-server

2.6.1 脚本启动

执行/seata/bin/seata-server.bat命令，看到如下日志即是启动成功；
同时可以看到nacos上已经注册成功

四、代码整合

4.1 POM依赖

seata依赖

<dependency>
  <groupId>io.seata</groupId>
  <artifactId>seata-spring-boot-starter</artifactId>
  <version>1.4.0</version>
</dependency>

4.2 配置文件

bootstrap.yml内容如下：

seata:
  enabled: true
  application-id: ${spring.application.name}
  enable-auto-data-source-proxy: true #是否开启数据源自动代理
  tx-service-group: my_test_tx_group #需要和config.txt上传到nacos上的service.vgroupMapping.my_test_tx_group保持一致
  service:
    vgroup-mapping:
      my_test_tx_group: default
    disable-global-transaction: false
  registry:
    type: nacos
    nacos:
      application: seata-server
      server-addr: 127.0.0.1:8848
      group: "SEATA_GROUP"
  #      namespace: "seed-local"
  config:
    type: nacos
    nacos:
      server-addr: 127.0.0.1:8848
      group: "SEATA_GROUP"
#      namespace: "seed-local"

五、回滚案例

@GlobalTransactional(rollbackFor = Exception.class)
  public void updateTest() {
    String sql = "update tbl_card set amount=amount+1 where owner='b'";
    jdbcTemplate.update(sql);
    System.out.println(1/0);
  }

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