alibaba seata服务端具体实现
alibaba seata服务端具体实现
目录seata是什么？Seata术语seata服务端具体实现 seata客户端
seata是什么？
seata是来处理分布式服务之间互相调用的事务问题。
Seata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。
seata中文文档：Seata 是什么
seata下载地址：https://github.com/seata/seata/releases
seata服务端具体实现
我下载的是1.3.0
解压后目录结构
修改配置文件：registry.conf 注册信息。type默认是file，我要注册到nacos，修改nacos配置信息。
registry {
# file 、nacos 、eureka、redis、zk、consul、etcd3、sofa
type = "nacos"
nacos {
application = "seata-server"
serverAddr = "127.0.0.1:3333"
group = "SEATA_GROUP"
namespace = ""
cluster = "default"
username = "nacos"
password = "nacos"
}
eureka {
serviceUrl = "http://localhost:8761/eureka"
application = "default"
weight = "1"
}
redis {
serverAddr = "localhost:6379"
db = 0
password = ""
cluster = "default"
timeout = 0
}
zk {
cluster = "default"
serverAddr = "127.0.0.1:2181"
sessionTimeout = 6000
connectTimeout = 2000
username = ""
password = ""
}
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 = "127.0.0.1:8848"
namespace = ""
group = "SEATA_GROUP"
username = ""
password = ""
}
consul {
serverAddr = "127.0.0.1:8500"
}
apollo {
appId = "seata-server"
apolloMeta = "http://192.168.1.204:8801"
namespace = "application"
}
zk {
serverAddr = "127.0.0.1:2181"
sessionTimeout = 6000
connectTimeout = 2000
username = ""
password = ""
}
etcd3 {
serverAddr = "http://localhost:2379"
}
file {
name = "file.conf"
}
}
file.conf配置数据库信息，这里我配置的是db。要新建数据库。添加四张表。
branch_table、global_table、lock_table、undo_log。1.3.0版本没有给我们sql。其它版本有sql写在下面
## transaction log store, only used in seata-server
store {
## store mode: file、db、redis
mode = "db"
## 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.cj.jdbc.Driver"
url = "jdbc:mysql://127.0.0.1:3306/seata?serverTimezone=UTC&useUnicode=true&characterEncoding=utf-8"
user = "root"
password = "123456"
minConn = 5
maxConn = 30
globalTable = "global_table"
branchTable = "branch_table"
lockTable = "lock_table"
queryLimit = 100
maxWait = 5000
}
## redis store property
redis {
host = "127.0.0.1"
port = "6379"
password = ""
database = "0"
minConn = 1
maxConn = 10
queryLimit = 100
}
}
sql
SET NAMES utf8mb4;
SET FOREIGN_KEY_CHECKS = 0;
-- ----------------------------
-- Table structure for branch_table
-- ----------------------------
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) DEFAULT NULL,
`resource_group_id` varchar(32) CHARACTER SET utf8 COLLATE utf8_general_ci DEFAULT NULL,
`resource_id` varchar(256) CHARACTER SET utf8 COLLATE utf8_general_ci DEFAULT NULL,
`branch_type` varchar(8) CHARACTER SET utf8 COLLATE utf8_general_ci DEFAULT NULL,
`status` tinyint(4) DEFAULT NULL,
`client_id` varchar(64) CHARACTER SET utf8 COLLATE utf8_general_ci DEFAULT NULL,
`application_data` varchar(2000) CHARACTER SET utf8 COLLATE utf8_general_ci DEFAULT NULL,
`gmt_create` datetime(6) DEFAULT NULL,
`gmt_modified` datetime(6) 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;
-- ----------------------------
-- 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) DEFAULT NULL,
`status` tinyint(4) NOT NULL,
`application_id` varchar(32) CHARACTER SET utf8 COLLATE utf8_general_ci DEFAULT NULL,
`transaction_service_group` varchar(32) CHARACTER SET utf8 COLLATE utf8_general_ci DEFAULT NULL,
`transaction_name` varchar(128) CHARACTER SET utf8 COLLATE utf8_general_ci DEFAULT NULL,
`timeout` int(11) DEFAULT NULL,
`begin_time` bigint(20) DEFAULT NULL,
`application_data` varchar(2000) CHARACTER SET utf8 COLLATE utf8_general_ci DEFAULT NULL,
`gmt_create` datetime(0) DEFAULT NULL,
`gmt_modified` datetime(0) 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;
-- ----------------------------
-- 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 DEFAULT NULL,
`transaction_id` bigint(20) DEFAULT NULL,
`branch_id` bigint(20) NOT NULL,
`resource_id` varchar(256) CHARACTER SET utf8 COLLATE utf8_general_ci DEFAULT NULL,
`table_name` varchar(32) CHARACTER SET utf8 COLLATE utf8_general_ci DEFAULT NULL,
`pk` varchar(36) CHARACTER SET utf8 COLLATE utf8_general_ci DEFAULT NULL,
`gmt_create` datetime(0) DEFAULT NULL,
`gmt_modified` datetime(0) 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;
-- ----------------------------
-- 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 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;
SET FOREIGN_KEY_CHECKS = 1;
启动你自己的nacos注册中心。
然后在bin目录下双击seata-server.bat文件启动。
查看nacos注册中心，发现有seata的服务，就表示成功了。
seata客户端
pom文件
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
yml文件
server:
port: 2001
spring:
application:
name: seata-order-service
cloud:
nacos:
discovery:
server-addr: 127.0.0.1:3333
config:
file-extension: yml
datasource:
driver-class-name: com.mysql.cj.jdbc.Driver
url: jdbc:mysql://127.0.0.1:3306/order?serverTimezone=UTC&useUnicode=true&characterEncoding=utf-8
username: root
password: 123456
type: com.alibaba.druid.pool.DruidDataSource
mybatis:
type-aliases-package: com.xx.job.entity
mapper-locations: classpath:mapper/*.xml
#====================================Seata Config===============================================
seata:
enabled: true
application-id: account-seata-example
tx-service-group: account-service-seata-service-group # 事务群组（可以每个应用独立取名，也可以使用相同的名字）
client:
rm-report-success-enable: true
rm-table-meta-check-enable: false # 自动刷新缓存中的表结构（默认false）
rm-report-retry-count: 5 # 一阶段结果上报TC重试次数（默认5）
rm-async-commit-buffer-limit: 10000 # 异步提交缓存队列长度（默认10000）
rm:
lock:
lock-retry-internal: 10 # 校验或占用全局锁重试间隔（默认10ms）
lock-retry-times: 30 # 校验或占用全局锁重试次数（默认30）
lock-retry-policy-branch-rollback-on-conflict: true # 分支事务与其它全局回滚事务冲突时锁策略（优先释放本地锁让回滚成功）
tm-commit-retry-count: 3 # 一阶段全局提交结果上报TC重试次数（默认1次，建议大于1）
tm-rollback-retry-count: 3 # 一阶段全局回滚结果上报TC重试次数（默认1次，建议大于1）
undo:
undo-data-validation: true # 二阶段回滚镜像校验（默认true开启）
undo-log-serialization: jackson # undo序列化方式（默认jackson）
undo-log-table: undo_log # 自定义undo表名（默认undo_log）
log:
exceptionRate: 100 # 日志异常输出概率（默认100）
support:
spring:
datasource-autoproxy: true
service:
vgroup-mapping:
my_test_tx_group: default # TC 集群（必须与seata-server保持一致）
enable-degrade: false # 降级开关
disable-global-transaction: false # 禁用全局事务（默认false）
grouplist:
default: 127.0.0.1:8091
transport:
shutdown:
wait: 3
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
type: TCP
server: NIO
heartbeat: true
serialization: seata
compressor: none
enable-client-batch-send-request: true # 客户端事务消息请求是否批量合并发送（默认true）
registry:
file:
name: file.conf
type: nacos
server-addr: localhost:3333
namespace:
cluster: default
config:
业务代码需要加上两个注解，本地事物和分布式事物。
@Transactional@GlobalTransactional
package com.xx.job.seataorderservice2001.controller;
import com.xx.job.common.CommonResult;
import com.xx.job.entity.Account;
import com.xx.job.entity.Order;
import com.xx.job.entity.Storage;
import com.xx.job.seataorderservice2001.service.AccountService;
import com.xx.job.seataorderservice2001.service.OrderService;
import com.xx.job.seataorderservice2001.service.StorageSerivce;
import io.seata.spring.annotation.GlobalTransactional;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.transaction.annotation.Transactional;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
@Slf4j
@RestController
public class OrderController {
@Autowired
private OrderService orderService;
private AccountService accountService;
private StorageSerivce storageSerivce;
/**
* 加订单 减余额 减库存
* @param order
* @return
*/
@Transactional
@GlobalTransactional
@RequestMapping("/order/create")
public CommonResult create(Order order){
// 加订单
orderService.create(order);
// 减余额
Account account = new Account();
account.setUserId(ordehttp://r.getUserId());
account.setMoney(80);
accountService.update(account);
// 减库存
Storage storage = new Storage();
storage.setCount(999);
storage.setCommodityCode(order.getCommodityCode());
storageSerivce.update(storage);
return new CommonResult(200,"添加订单成功！");
}
}
具体demo gitee：spring-cloud-demo: spring-cloud-demo试例
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