链接: https://pan.baidu.com/s/1c5fYBPDPAOXFgwttlaCqng?pwd=ovun 提取码: ovun2.解压之后修改配置文件
2.1 registry.conf的注册方式和配置方式改为nacos对应配置
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"
dataId = "seataServer.properties"
}
}
2.2 修改file.conf文件 mode改为db 修改对应数据库url、账号、密码
store {
## store mode: file、db、redis
mode = "db"
## rsa decryption public key
publicKey = ""
## 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)/HikariDataSource(hikari) etc.
datasource = "druid"
## mysql/oracle/postgresql/h2/oceanbase etc.
dbType = "mysql"
driverClassName = "com.mysql.jdbc.Driver"
## if using mysql to store the data, recommend add rewriteBatchedStatements=true in jdbc connection param
url = "jdbc:mysql://127.0.0.1:3306/seata?rewriteBatchedStatements=true"
user = "root"
password = "123456"
minConn = 5
maxConn = 100
maxConn = 100
globalTable = "global_table"
branchTable = "branch_table"
lockTable = "lock_table"
queryLimit = 100
maxWait = 5000
}
}
2.3 创建数据库 seata 并且创建三张表，每个业务库都要有一张undo_log表
-- -------------------------------- The script used when storeMode is 'db' --------------------------------
-- the table to store GlobalSession data
CREATE TABLE IF NOT EXISTS `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`)
) ENGINE = InnoDB
DEFAULT CHARSET = utf8;
-- the table to store BranchSession data
CREATE TABLE IF NOT EXISTS `branch_table`
(
`branch_id` BIGINT NOT NULL,
`xid` VARCHAr(128) NOT NULL,
`transaction_id` BIGINT,
`resource_group_id` VARCHAr(32),
`resource_id` VARCHAr(256),
`branch_type` VARCHAr(8),
`status` TINYINT,
`client_id` VARCHAr(64),
`application_data` VARCHAr(2000),
`gmt_create` DATETIME(6),
`gmt_modified` DATETIME(6),
PRIMARY KEY (`branch_id`),
KEY `idx_xid` (`xid`)
) ENGINE = InnoDB
DEFAULT CHARSET = utf8;
-- the table to store lock data
CREATE TABLE IF NOT EXISTS `lock_table`
(
`row_key` VARCHAr(128) NOT NULL,
`xid` VARCHAr(96),
`transaction_id` BIGINT,
`branch_id` BIGINT NOT NULL,
`resource_id` VARCHAr(256),
`table_name` VARCHAr(32),
`pk` VARCHAr(36),
`gmt_create` DATETIME,
`gmt_modified` DATETIME,
PRIMARY KEY (`row_key`),
KEY `idx_branch_id` (`branch_id`)
) ENGINE = InnoDB
DEFAULT CHARSET = utf8;
每一个业务库都创建一张undo_log日志表，此表记录事务提交前的快照，用于回滚
-- for AT mode you must to init this sql for you business database. the seata server not need it.
CREATE TABLE IF NOT EXISTS `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
AUTO_INCREMENT = 1
DEFAULT CHARSET = utf8 COMMENT ='AT transaction mode undo table';
3.启动nacos，上传配置
seata-server会往nacos进行注册
3.1 上传配置到nacos
从v1.4.2版本开始，已支持从一个Nacos dataId中获取所有配置信息,你只需要额外添加一个dataId配置项。
在nacos创建dataId为seataServer.properties的配置项
完整配置内容如下
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.myGroup=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.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.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://127.0.0.1:3306/seata?useUnicode=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.host=127.0.0.1 store.redis.port=6379 store.redis.maxConn=10 store.redis.minConn=1 store.redis.database=0 store.redis.password=null 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.log.exceptionRate=100 transport.serialization=seata transport.compressor=none metrics.enabled=false metrics.registryType=compact metrics.exporterList=prometheus metrics.exporterPrometheusPort=9898
注意需要修改的地方
service.vgroupMapping.myGroup=default myGroup是事务组名，可以自定义，后面要用到 store.mode=db store.db.url=jdbc:mysql://127.0.0.1:3306/seata?useUnicode=true store.db.user=root store.db.password=123456
到此seata的所有配置完成
4.spring cloud alibaba集成4.1创建项目cloud-alibaba-starter-seata-order(下订单)和cloud-alibaba-starter-seata-product(扣库存)
4.2分别引入依赖，application.yml文件中添加配置
com.alibaba.cloud spring-cloud-starter-alibaba-seata seata-spring-boot-starter io.seata io.seata seata-spring-boot-starter 1.4.2
application.yml文件 2个项目都要加
server:
port: 8095
spring:
application:
name: service-seata-order
####### 数据源的相关配置
datasource:
type: com.alibaba.druid.pool.DruidDataSource # 数据源类型：druid
driver-class-name: com.mysql.cj.jdbc.Driver # mysql驱动
url: jdbc:mysql://127.0.0.1:3306/cloud_alibaba_starter?useUnicode=true&characterEncoding=UTF-8&autoReconnect=true
username: root
password: 123456
cloud:
nacos:
discovery:
server-addr: 127.0.0.1:8848
mybatis-plus:
mapper-locations: classpath*:/mapper
@RestController
@RequestMapping("order")
public class OrderController {
@Resource
private OrderService orderService;
@Resource
private ProductClient productClient;
@GetMapping("create")
@GlobalTransactional
public boolean create(@RequestParam Integer productId,
@RequestParam Integer count){
orderService.create(productId, count);
productClient.decut(productId, count);
// 执行到这里两个服务的事务都已经提交了，下面抛出异常之后就会全局回滚
int i = 1 / 0;
return true;
}
}
