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JDK：1.8
spring-cloud.version：Hoxton.SR8
alibaba.version： 2.2.1.RELEASE
seata.version：1.3.0
nacos: 1.3.1
下载nacos我下载的nacos-server-1.3.2.zip
seata我下载的是 seata-server-1.3.0.zip
创建数据库 server 数据库脚本 同时每一个参与事务的数据库需要添加一张表 下载地址
上传seata配置到nacos
下载nacos-config.sh文件,放到解压文件conf文件夹下
修改conf目录下file.conf配置文件，主要是修改自定义事务组名称，事务日志存储模式为db，并修改数据库连接信息
service {
#vgroup->rgroup
vgroup_mapping.tx-service-group = "default" #修改事务组名称为：tx-service-group，和客户端自定义的名称对应
#only support single node
default.grouplist = "127.0.0.1:8091"
#degrade current not support
enableDegrade = false
#disable
disable = false
#unit ms,s,m,h,d represents milliseconds, seconds, minutes, hours, days, default permanent
max.commit.retry.timeout = "-1"
max.rollback.retry.timeout = "-1"
}
## 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/h3/oceanbase etc.
dbType = "mysql"
driverClassName = "com.mysql.jdbc.Driver"
url = "jdbc:mysql://192.168.240.129:3306/seat_server"
user = "root"
password = "Root_123456"
minConn = 5
maxConn = 30
globalTable = "global_table"
branchTable = "branch_table"
lockTable = "lock_table"
queryLimit = 100
maxWait = 5000
}
}修改conf目录下 registry.conf配置，指明注册中心为nacos，及修改nacos连接信息。
registry {
# file 、nacos 、eureka、redis、zk、consul、etcd3、sofa
type = "nacos"
nacos {
application = "seata-server"
serverAddr = "127.0.0.1:8848"
group = "default"
namespace = ""
cluster = "default"
username = "nacos"
password = "nacos"
}
}
config {
# file、nacos 、apollo、zk、consul、etcd3 SEATA_GROUP
type = "nacos"
nacos {
serverAddr = "127.0.0.1:8848"
namespace = "default"
group = ""
username = "nacos"
password = "nacos"
}
}上传配置到nacos: 在conf目录下打开git bash here 执行nacos-config.sh 输入命令 sh nacos-config.sh -h 127.0.0.1 
创建client服务
创建seat_order库，用来存储订单信息
创建seat_storage库，用来存储库存信息
创建seat_account，用来存储账户信息
三个库添加日志回滚表
完整数据库示意图
5. 创建seata-order-service（订单服务），seata-storage-service（库存服务），seata-account-service（账户服务）
配置内容大同小异以order服务的配置为例,修改bootstrap.yml文件
server: port: 8180 spring: application: name: seata-order-service cloud: nacos: discovery: server-addr: 127.0.0.1:8848 username: "nacos" password: "nacos" config: server-addr: 127.0.0.1:8848 username: "nacos" password: "nacos" mybatis: mapperLocations: classpath:mapper/*.xml
修改application.yml文件
seata: enabled: true application-id: seata-order-service tx-service-group: my_test_tx_group #tx-service-group需要与conf目录下file.conf文件下名称一致 config: type: nacos nacos: namespace: serverAddr: 127.0.0.1:8848 group: SEATA_GROUP username: "nacos" password: "nacos" registry: type: nacos nacos: application: seata-server server-addr: 127.0.0.1:8848 group: SEATA_GROUP namespace: username: "nacos" password: "nacos" spring: datasource: #driver-class-name: com.mysql.jdbc.Driver username: root password: 'Root_123456' url: jdbc:mysql://192.168.240.129:3306/seat_order?characterEncoding=utf-8&useSSL=false
添加主方法
@RestController
@RequestMapping(value = "/order")
public class OrderController {
@Autowired
private OrderService orderService;
/**
* 创建订单
*/
@GetMapping("/create")
@GlobalTransactional
public CommonResult create(Order order) {
orderService.create(order);
return new CommonResult("订单创建成功!", 200);
}
}启动nacos，seata，seata-order-service，seata-storage-service，seata-account-service
2020-09-21 16:17:08.307 INFO 29768 --- [ main] i.s.s.a.GlobalTransactionScanner : Initializing Global Transaction Clients ... 2020-09-21 16:17:08.394 INFO 29768 --- [ main] i.s.core.rpc.netty.NettyClientBootstrap : NettyClientBootstrap has started 2020-09-21 16:17:08.394 INFO 29768 --- [ main] i.s.s.a.GlobalTransactionScanner : Transaction Manager Client is initialized. applicationId[seata-order-service] txServiceGroup[my_test_tx_group] 2020-09-21 16:17:08.403 INFO 29768 --- [ main] io.seata.rm.datasource.AsyncWorker : Async Commit Buffer Limit: 10000 2020-09-21 16:17:08.403 INFO 29768 --- [ main] i.s.rm.datasource.xa.ResourceManagerXA : ResourceManagerXA init ... 2020-09-21 16:17:08.408 INFO 29768 --- [ main] i.s.core.rpc.netty.NettyClientBootstrap : NettyClientBootstrap has started 2020-09-21 16:17:08.408 INFO 29768 --- [ main] i.s.s.a.GlobalTransactionScanner : Resource Manager is initialized. applicationId[seata-order-service] txServiceGroup[my_test_tx_group] 2020-09-21 16:17:08.408 INFO 29768 --- [ main] i.s.s.a.GlobalTransactionScanner : Global Transaction Clients are initialized.
3. 测试分布式事务
库的初始状态
访问 http://localhost:8180/order/create?userId=1&productId=1&count=10&money=100
2020-09-21 16:27:22.497 INFO 29768 --- [nio-8180-exec-9] i.seata.tm.api.DefaultGlobalTransaction : Begin new global transaction [192.168.240.1:8091:51345170083352576] 2020-09-21 16:27:22.497 INFO 29768 --- [nio-8180-exec-9] c.m.cloud.service.impl.OrderServiceImpl : ------->下单开始 2020-09-21 16:27:22.508 INFO 29768 --- [nio-8180-exec-9] c.m.cloud.service.impl.OrderServiceImpl : ------->order-service中扣减库存开始 2020-09-21 16:27:22.530 INFO 29768 --- [nio-8180-exec-9] c.m.cloud.service.impl.OrderServiceImpl : ------->order-service中扣减库存结束 2020-09-21 16:27:22.530 INFO 29768 --- [nio-8180-exec-9] c.m.cloud.service.impl.OrderServiceImpl : ------->order-service中扣减余额开始 2020-09-21 16:27:22.543 INFO 29768 --- [nio-8180-exec-9] c.m.cloud.service.impl.OrderServiceImpl : ------->order-service中扣减余额结束 2020-09-21 16:27:22.543 INFO 29768 --- [nio-8180-exec-9] c.m.cloud.service.impl.OrderServiceImpl : ------->order-service中修改订单状态开始 2020-09-21 16:27:22.550 INFO 29768 --- [nio-8180-exec-9] c.m.cloud.service.impl.OrderServiceImpl : ------->order-service中修改订单状态结束 2020-09-21 16:27:22.550 INFO 29768 --- [nio-8180-exec-9] c.m.cloud.service.impl.OrderServiceImpl : ------->下单结束 2020-09-21 16:27:22.552 INFO 29768 --- [nio-8180-exec-9] i.seata.tm.api.DefaultGlobalTransaction : [192.168.240.1:8091:51345170083352576] commit status: Committed 2020-09-21 16:27:22.560 INFO 29768 --- [h_RMROLE_1_6_16] i.s.c.r.p.c.RmBranchCommitProcessor : rm client handle branch commit process:xid=192.168.240.1:8091:51345170083352576,branchId=51345170112712704,branchType=AT,resourceId=jdbc:mysql://192.168.240.129:3306/seat_order,applicationData=null 2020-09-21 16:27:22.560 INFO 29768 --- [h_RMROLE_1_6_16] io.seata.rm.AbstractRMHandler : Branch committing: 192.168.240.1:8091:51345170083352576 51345170112712704 jdbc:mysql://192.168.240.129:3306/seat_order null 2020-09-21 16:27:22.560 INFO 29768 --- [h_RMROLE_1_6_16] io.seata.rm.AbstractRMHandler : Branch commit result: PhaseTwo_Committed 2020-09-21 16:27:22.622 INFO 29768 --- [h_RMROLE_1_7_16] i.s.c.r.p.c.RmBranchCommitProcessor : rm client handle branch commit process:xid=192.168.240.1:8091:51345170083352576,branchId=51345170297262080,branchType=AT,resourceId=jdbc:mysql://192.168.240.129:3306/seat_order,applicationData=null 2020-09-21 16:27:22.622 INFO 29768 --- [h_RMROLE_1_7_16] io.seata.rm.AbstractRMHandler : Branch committing: 192.168.240.1:8091:51345170083352576 51345170297262080 jdbc:mysql://192.168.240.129:3306/seat_order null 2020-09-21 16:27:22.622 INFO 29768 --- [h_RMROLE_1_7_16] io.seata.rm.AbstractRMHandler : Branch commit result: PhaseTwo_Committed
数据库状态
模拟异常
/**
* 扣减账户余额
*/
@Override
public void decrease(Long userId, BigDecimal money) {
LOGGER.info("------->account-service中扣减账户余额开始");
//模拟超时异常，全局事务回滚
try {
Thread.sleep(30*1000);
} catch (InterruptedException e) {
e.printStackTrace();
}
accountDao.decrease(userId,money);
LOGGER.info("------->account-service中扣减账户余额结束");
}会发现数据库没有变化，并且控制台打印日志如下
2020-09-21 16:29:53.921 INFO 29768 --- [nio-8180-exec-3] i.seata.tm.api.DefaultGlobalTransaction : Begin new global transaction [192.168.240.1:8091:51345805197447168] 2020-09-21 16:29:53.921 INFO 29768 --- [nio-8180-exec-3] c.m.cloud.service.impl.OrderServiceImpl : ------->下单开始 2020-09-21 16:29:53.931 INFO 29768 --- [nio-8180-exec-3] c.m.cloud.service.impl.OrderServiceImpl : ------->order-service中扣减库存开始 2020-09-21 16:29:53.957 INFO 29768 --- [nio-8180-exec-3] c.m.cloud.service.impl.OrderServiceImpl : ------->order-service中扣减库存结束 2020-09-21 16:29:53.957 INFO 29768 --- [nio-8180-exec-3] c.m.cloud.service.impl.OrderServiceImpl : ------->order-service中扣减余额开始 2020-09-21 16:29:56.099 INFO 29768 --- [h_RMROLE_1_8_16] i.s.c.r.p.c.RmBranchRollbackProcessor : rm handle branch rollback process:xid=192.168.240.1:8091:51345805197447168,branchId=51345805231001600,branchType=AT,resourceId=jdbc:mysql://192.168.240.129:3306/seat_order,applicationData=null 2020-09-21 16:29:56.100 INFO 29768 --- [h_RMROLE_1_8_16] io.seata.rm.AbstractRMHandler : Branch Rollbacking: 192.168.240.1:8091:51345805197447168 51345805231001600 jdbc:mysql://192.168.240.129:3306/seat_order 2020-09-21 16:29:56.142 INFO 29768 --- [h_RMROLE_1_8_16] i.s.r.d.undo.AbstractUndoLogManager : xid 192.168.240.1:8091:51345805197447168 branch 51345805231001600, undo_log deleted with GlobalFinished 2020-09-21 16:29:56.143 INFO 29768 --- [h_RMROLE_1_8_16] io.seata.rm.AbstractRMHandler : Branch Rollbacked result: PhaseTwo_Rollbacked 2020-09-21 16:29:56.147 INFO 29768 --- [nio-8180-exec-3] i.seata.tm.api.DefaultGlobalTransaction : [192.168.240.1:8091:51345805197447168] rollback status: Rollbacked 2020-09-21 16:29:56.167 ERROR 29768 --- [nio-8180-exec-3] o.a.c.c.C.[.[.[/].[dispatcherServlet] : Servlet.service() for servlet [dispatcherServlet] in context with path [] threw exception [Request processing failed; nested exception is feign.RetryableException: Read timed out executing GET http://seata-account-service/account/decrease?userId=1&money=100] with root cause java.net.SocketTimeoutException: Read timed out ...
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