SpringCloud集成Seata分布式事务

版本:

nacos version: 2.0.3

seata version: 1.3.0

mysql: 8.0

1. 下载Seata 服务端

        https://seata.io/zh-cn/blog/download.html

2. 配置修改: 

        2.1 : 修改 bin/file.conf  粘贴db需要的部分内容

        注意点:

                a. driverClassName:  驱动: "com.mysql.cj.jdbc.Driver"

                b. url: 时区:serverTimezone=UTC

## transaction log store, only used in seata-server
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://127.0.0.1:3306/seata?serverTimezone=UTC"
    user = "root"
    password = "Admin2019!"
    minConn = 5
    maxConn = 30
    globalTable = "global_table"
    branchTable = "branch_table"
    lockTable = "lock_table"
    queryLimit = 100
    maxWait = 5000
  }

}

        2.2 修改registry.conf

registry {
  # file 、nacos 、eureka、redis、zk、consul、etcd3、sofa
  type = "nacos"

  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"
  }
}

3. seata下随便创建一个目录scrpit,存放客户端[配置中心]所需推送的文件,需要启动nacos

配置中心下载地址:  

seata/script/config-center at develop · seata/seata · GitHub:fire: Seata is an easy-to-use, high-performance, open source distributed transaction solution. - seata/script/config-center at develop · seata/seatahttp://github.com/seata/seata/blob/develop/script/config-center        3.1 config.txt

transport.type=TCP
transport.server=NIO
transport.heartbeat=true
transport.enableTmClientBatchSendRequest=false
transport.enableRmClientBatchSendRequest=true
transport.rpcRmRequestTimeout=5000
transport.rpcTmRequestTimeout=10000
transport.rpcTcRequestTimeout=10000
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.default_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.rm.sagaJsonParser=fastjson
client.rm.tccActionInterceptorOrder=-2147482648
client.tm.commitRetryCount=5
client.tm.rollbackRetryCount=5
client.tm.defaultGlobalTransactionTimeout=60000
client.tm.degradeCheck=false
client.tm.degradeCheckAllowTimes=10
client.tm.degradeCheckPeriod=2000
client.tm.interceptorOrder=-2147482648
store.mode=db
store.lock.mode=file
store.session.mode=file
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.cj.jdbc.Driver
store.db.url=jdbc:mysql://127.0.0.1:3306/seata?useUnicode=true&rewriteBatchedStatements=true&serverTimezone=UTC
store.db.user=root
store.db.password=xxxxxx
store.db.minConn=5
store.db.maxConn=30
store.db.globalTable=global_table
store.db.branchTable=branch_table
store.db.distributedLockTable=distributed_lock
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.sentinel.masterName=
store.redis.sentinel.sentinelHosts=
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
server.distributedLockExpireTime=10000
client.undo.dataValidation=true
client.undo.logSerialization=kryo
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
tcc.fence.logTableName=tcc_fence_log
tcc.fence.cleanPeriod=1h

     3.2 进入git的配置中心的nacos文件下 使用 nacos-config.sh 向 nacos 推送 

     windows下使用工具 git bash:

配置中心的部分READ_ME

sh ${SEATAPATH}/script/config-center/nacos/nacos-config.sh -h localhost -p 8848 -g SEATA_GROUP -t 5a3c7d6c-f497-4d68-a71a-2e5e3340b3ca -u username -w password

Parameter Description:

-h: host, the default value is localhost.

-p: port, the default value is 8848.

-g: Configure grouping, the default value is 'SEATA_GROUP'.

-t: Tenant information, corresponding to the namespace ID field of Nacos, the default value is ''.

-u: username, nacos 1.2.0+ on permission control, the default value is ''.

-w: password, nacos 1.2.0+ on permission control, the default value is ''.

   4. 创建Seata所依赖的数据库表 及 个人业务服务下的依赖表

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`)
);
 
 
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`)
);
 
 
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`)
);

       每个服务下所需要的表

-- 每个业务库需要添加这张表
CREATE TABLE `undo_log` (
  `id` bigint(20) NOT NULL AUTO_INCREMENT COMMENT '主键',
  `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',
  PRIMARY KEY (`id`),
  UNIQUE KEY `ux_undo_log` (`xid`,`branch_id`)
) ENGINE=InnoDB AUTO_INCREMENT=9 DEFAULT CHARSET=utf8 COMMENT='AT transaction mode undo table';

 5. 业务服务的配置 application.yml

seata:
  application-id: ${spring.application.name}
  #需要和nacos中配置 [service.vgroupMapping.default_tx_group] 保持一致
  tx-service-group: default_tx_group
  config:
    type: nacos
    nacos:
      #需要和server在同一个注册中心下
      serverAddr: 127.0.0.1:8848
      #需要server端(registry和config)、nacos配置client端(registry和config)保持一致
      group: SEATA_GROUP
  registry:
    type: nacos
    nacos:
      #需要和server端保持一致，即server在nacos中的名称，默认为seata-server
      application: seata-server
      serverAddr: 127.0.0.1:8848
      #需要server端(registry和config)、nacos配置client端(registry和config)保持一致
      group: SEATA_GROUP

6. 代码中使用(示例):  

1. 数据源配置[一般添加在启动类上]:   @EnableAutoDataSourceProxy

2.  代码中使用   

 @GlobalTransactional

    @GlobalTransactional  //仅加此一行代码即可
    @PutMapping(value = "/auditSeata/{id}")
    public  (@RequestBody  args) {
        xxxx
        return ;
    }

7. 遇到的坑:

        7.1 区分mysql 8.0驱动和时区等问题,上述已提到

        7.2 在MySQL8.0中执行undo时报错Cannot construct instance of `java.time.LocalDateTime`的原因及解决方法 

                解决方式很多,仅选择一种,感觉方便点

1. 更换序列化/反序列化器，在配置中心中(以nacos为例)修改配置client.undo.logSerialization=kryo，然后代码中再引入kryo的依赖包，更换掉坑爹的jackson

2. 添加依赖
        
            com.esotericsoftware
            kryo
            4.0.2
        
        
            de.javakaffee
            kryo-serializers
            0.44
        

        7.3 组的对应关系

                [tx-service-group] 对应nacos中 [service.vgroupMapping.default_tx_group]

        7.4 单机windows启动: 

                ./seata-server.bat -p 8091 -h 127.0.0.1 -m db

               对应nacos配置:

                [service.default.grouplist=127.0.0.1:8091] 

                [store.mode=db]