alibaba seata服務端具體實現
seata是什麼？
seata是來處理分佈式服務之間互相調用的事務問題。
Seata術語
TC (Transaction Coordinator) – 事務協調者
維護全局和分支事務的狀態，驅動全局事務提交或回滾。
TM (Transaction Manager) – 事務管理器
定義全局事務的范圍：開始全局事務、提交或回滾全局事務。
RM (Resource Manager) – 資源管理器
管理分支事務處理的資源，與TC交談以註冊分支事務和報告分支事務的狀態，並驅動分支事務提交或回滾。
seata中文文檔：Seata 是什麼
seata下載地址：https://github.com/seata/seata/releases
seata服務端具體實現
我下載的是1.3.0
解壓後目錄結構
修改配置文件：registry.conf 註冊信息。type默認是file，我要註冊到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配置數據庫信息，這裡我配置的是db。要新建數據庫。添加四張表。
branch_table、global_table、lock_table、undo_log。1.3.0版本沒有給我們sql。其它版本有sql寫在下面
## 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;
啟動你自己的nacos註冊中心。
然後在bin目錄下雙擊seata-server.bat文件啟動。
查看nacos註冊中心，發現有seata的服務，就表示成功瞭。
seata客戶端
pom文件
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<parent>
<artifactId>spring-cloud-demo</artifactId>
<groupId>com.xx.job</groupId>
<version>1.0-SNAPSHOT</version>
</parent>
<artifactId>seata-order-service2001</artifactId>
<properties>
<java.version>1.8</java.version>
</properties>
<dependencies>
<dependency>
<groupId>com.xx.job</groupId>
<artifactId>cloud-common</artifactId>
<version>${project.version}</version>
</dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<groupId>org.mybatis.spring.boot</groupId>
<artifactId>mybatis-spring-boot-starter</artifactId>
<version>2.0.0</version>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-data-jpa</artifactId>
<groupId>com.alibaba</groupId>
<artifactId>druid</artifactId>
<artifactId>spring-boot-starter-web</artifactId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.11</version>
<artifactId>spring-boot-starter-actuator</artifactId>
<groupId>com.alibaba.cloud</groupId>
<artifactId>spring-cloud-starter-alibaba-nacos-discovery</artifactId>
<artifactId>spring-cloud-starter-alibaba-nacos-config</artifactId>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-openfeign</artifactId>
<groupId>io.seata</groupId>
<artifactId>seata-all</artifactId>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<configuration>
<source>6</source>
<target>6</target>
</configuration>
</plugins>
</build>
</project>
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 # 事務群組（可以每個應用獨立取名，也可以使用相同的名字）
client:
rm-report-success-enable: true
rm-table-meta-check-enable: false # 自動刷新緩存中的表結構（默認false）
rm-report-retry-count: 5 # 一階段結果上報TC重試次數（默認5）
rm-async-commit-buffer-limit: 10000 # 異步提交緩存隊列長度（默認10000）
rm:
lock:
lock-retry-internal: 10 # 校驗或占用全局鎖重試間隔（默認10ms）
lock-retry-times: 30 # 校驗或占用全局鎖重試次數（默認30）
lock-retry-policy-branch-rollback-on-conflict: true # 分支事務與其它全局回滾事務沖突時鎖策略（優先釋放本地鎖讓回滾成功）
tm-commit-retry-count: 3 # 一階段全局提交結果上報TC重試次數（默認1次，建議大於1）
tm-rollback-retry-count: 3 # 一階段全局回滾結果上報TC重試次數（默認1次，建議大於1）
undo:
undo-data-validation: true # 二階段回滾鏡像校驗（默認true開啟）
undo-log-serialization: jackson # undo序列化方式（默認jackson）
undo-log-table: undo_log # 自定義undo表名（默認undo_log）
log:
exceptionRate: 100 # 日志異常輸出概率（默認100）
support:
spring:
datasource-autoproxy: true
service:
vgroup-mapping:
my_test_tx_group: default # TC 集群（必須與seata-server保持一致）
enable-degrade: false # 降級開關
disable-global-transaction: false # 禁用全局事務（默認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 # 客戶端事務消息請求是否批量合並發送（默認true）
registry:
file:
name: file.conf
type: nacos
server-addr: localhost:3333
namespace:
cluster: default
config:
業務代碼需要加上兩個註解，本地事物和分佈式事物。
@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;
/**
* 加訂單 減餘額 減庫存
* @param order
* @return
*/
@Transactional
@GlobalTransactional
@RequestMapping("/order/create")
public CommonResult create(Order order){
// 加訂單
orderService.create(order);
// 減餘額
Account account = new Account();
account.setUserId(order.getUserId());
account.setMoney(80);
accountService.update(account);
// 減庫存
Storage storage = new Storage();
storage.setCount(999);
storage.setCommodityCode(order.getCommodityCode());
storageSerivce.update(storage);
return new CommonResult(200,"添加訂單成功！");
}
}
具體demo gitee：spring-cloud-demo: spring-cloud-demo試例
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