Spring Cloud Alibaba配置搭建 Seata案例--帐户
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2022-04-15 18:30:44
这里我们会创建三个微服务:一个订单服务,一个库存服务,一个账户服务。当用户下单时,会在订单服务中创建一个订单,然后通过远程调用库存服务来扣减下单商品的库存,再通过远程调用账户服务来扣减用户账户里面的余额,最后在订单服务中修改订单状态为已完成。...
Seata 之 Account-Module 配置搭建
建 Module
seata-account-service2003
改 POM
<?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 http://maven.apache.org/xsd/maven-4.0.0.xsd"> <parent> <artifactId>cloud2020</artifactId> <groupId>demo.yangxu.springcloud</groupId> <version>1.0-SNAPSHOT</version> </parent> <modelVersion>4.0.0</modelVersion> <artifactId>seata-account-service2003</artifactId> <dependencies> <!--nacos--> <dependency> <groupId>com.alibaba.cloud</groupId> <artifactId>spring-cloud-starter-alibaba-nacos-discovery</artifactId> </dependency> <!--seata--> <dependency> <groupId>com.alibaba.cloud</groupId> <artifactId>spring-cloud-starter-alibaba-seata</artifactId> <exclusions> <exclusion> <artifactId>seata-all</artifactId> <groupId>io.seata</groupId> </exclusion> </exclusions> </dependency> <dependency> <groupId>io.seata</groupId> <artifactId>seata-all</artifactId> <version>0.9.0</version> </dependency> <!--feign--> <dependency> <groupId>org.springframework.cloud</groupId> <artifactId>spring-cloud-starter-openfeign</artifactId> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-web</artifactId> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-test</artifactId> <scope>test</scope> </dependency> <dependency> <groupId>org.mybatis.spring.boot</groupId> <artifactId>mybatis-spring-boot-starter</artifactId> <version>2.0.0</version> </dependency> <dependency> <groupId>mysql</groupId> <artifactId>mysql-connector-java</artifactId> <version>5.1.37</version> </dependency> <dependency> <groupId>com.alibaba</groupId> <artifactId>druid-spring-boot-starter</artifactId> <version>1.1.10</version> </dependency> <dependency> <groupId>org.projectlombok</groupId> <artifactId>lombok</artifactId> <optional>true</optional> </dependency> </dependencies> </project>
写 YAML
application.yaml
server: port: 2003 spring: application: name: seata-account-service cloud: alibaba: seata: #自定义事务组名称需要与seata-server中的对应 tx-service-group: fsp_tx_group nacos: discovery: server-addr: localhost:8848 datasource: driver-class-name: com.mysql.jdbc.Driver url: jdbc:mysql://192.168.25.158:3306/seata_account username: root password: RzMCMsJ&*4oi09Kc #开启feign的hystrix支持,默认是false feign: hystrix: enabled: false logging: level: io: seata: info mybatis: mapperLocations: classpath:mapper/*.xml
file.conf
拷贝 seata-server/conf 目录下的 file.conf
transport {
# tcp udt unix-domain-socket
type = "TCP"
#NIO NATIVE
server = "NIO"
#enable heartbeat
heartbeat = true
#thread factory for netty
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"
# netty boss thread size,will not be used for UDT
boss-thread-size = 1
#auto default pin or 8
worker-thread-size = 8
}
shutdown {
# when destroy server, wait seconds
wait = 3
}
serialization = "seata"
compressor = "none"
}
service {
#vgroup->rgroup
vgroup_mapping.fsp_tx_group = "default" #修改自定义事务组名称
#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"
}
client {
async.commit.buffer.limit = 10000
lock {
retry.internal = 10
retry.times = 30
}
report.retry.count = 5
tm.commit.retry.count = 1
tm.rollback.retry.count = 1
}
## transaction log store
store {
## store mode: file、db
mode = "db"
## file store
file {
dir = "sessionStore"
# branch session size , if exceeded first try compress lockkey, still exceeded throws exceptions
max-branch-session-size = 16384
# globe session size , if exceeded throws exceptions
max-global-session-size = 512
# file buffer size , if exceeded allocate new buffer
file-write-buffer-cache-size = 16384
# when recover batch read size
session.reload.read_size = 100
# async, sync
flush-disk-mode = async
}
## database store
db {
## the implement of javax.sql.DataSource, such as DruidDataSource(druid)/BasicDataSource(dbcp) etc.
datasource = "dbcp"
## mysql/oracle/h2/oceanbase etc.
db-type = "mysql"
driver-class-name = "com.mysql.jdbc.Driver"
url = "jdbc:mysql://192.168.25.158:3306/seata"
user = "root"
password = "RzMCMsJ&*4oi09Kc"
min-conn = 1
max-conn = 3
global.table = "global_table"
branch.table = "branch_table"
lock-table = "lock_table"
query-limit = 100
}
}
lock {
## the lock store mode: local、remote
mode = "remote"
local {
## store locks in user's database
}
remote {
## store locks in the seata's server
}
}
recovery {
#schedule committing retry period in milliseconds
committing-retry-period = 1000
#schedule asyn committing retry period in milliseconds
asyn-committing-retry-period = 1000
#schedule rollbacking retry period in milliseconds
rollbacking-retry-period = 1000
#schedule timeout retry period in milliseconds
timeout-retry-period = 1000
}
transaction {
undo.data.validation = true
undo.log.serialization = "jackson"
undo.log.save.days = 7
#schedule delete expired undo_log in milliseconds
undo.log.delete.period = 86400000
undo.log.table = "undo_log"
}
## metrics settings
metrics {
enabled = false
registry-type = "compact"
# multi exporters use comma divided
exporter-list = "prometheus"
exporter-prometheus-port = 9898
}
support {
## spring
spring {
# auto proxy the DataSource bean
datasource.autoproxy = false
}
}
registry.conf
拷贝 seata-server/conf 目录下的 registry.conf
registry {
# file 、nacos 、eureka、redis、zk、consul、etcd3、sofa
type = "nacos"
nacos {
serverAddr = "localhost:8848"
namespace = ""
cluster = "default"
}
eureka {
serviceUrl = "http://localhost:8761/eureka"
application = "default"
weight = "1"
}
redis {
serverAddr = "localhost:6379"
db = "0"
}
zk {
cluster = "default"
serverAddr = "127.0.0.1:2181"
session.timeout = 6000
connect.timeout = 2000
}
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 = "localhost"
namespace = ""
}
consul {
serverAddr = "127.0.0.1:8500"
}
apollo {
app.id = "seata-server"
apollo.meta = "http://192.168.1.204:8801"
}
zk {
serverAddr = "127.0.0.1:2181"
session.timeout = 6000
connect.timeout = 2000
}
etcd3 {
serverAddr = "http://localhost:2379"
}
file {
name = "file.conf"
}
}
domain
CommonResult
package demo.yangxu.springcloud.alibaba.domain; import lombok.AllArgsConstructor; import lombok.Data; import lombok.NoArgsConstructor; @Data @AllArgsConstructor @NoArgsConstructor public class CommonResult<T> { private Integer code; private String message; private T data; public CommonResult(Integer code, String message) { this(code,message,null); } }
Account
package demo.yangxu.springcloud.alibaba.domain; import java.math.BigDecimal; /**
* CREATE TABLE `t_account` (
* `id` bigint(11) NOT NULL COMMENT 'id',
* `user_id` bigint(11) DEFAULT NULL COMMENT '用户id',
* `total` decimal(10,0) DEFAULT NULL COMMENT '总额度',
* `used` decimal(10,0) DEFAULT NULL COMMENT '已用余额',
* `residue` decimal(10,0) DEFAULT NULL COMMENT '剩余可用额度',
* PRIMARY KEY (`id`) USING BTREE
* ) ENGINE=InnoDB DEFAULT CHARSET=utf8 ROW_FORMAT=DYNAMIC COMMENT='账户表';
*/ public class Account { private Long id; //用户id private Long userId; //总额度 private BigDecimal total; //已用额度 private BigDecimal used; //剩余额度 private BigDecimal residue; public Account(Long id, Long userId, BigDecimal total, BigDecimal used, BigDecimal residue) { this.id = id; this.userId = userId; this.total = total; this.used = used; this.residue = residue; } public Account() { } @Override public String toString() { return "Account{" + "id=" + id + ", userId=" + userId + ", total=" + total + ", used=" + used + ", residue=" + residue + '}'; } public Long getId() { return id; } public void setId(Long id) { this.id = id; } public Long getUserId() { return userId; } public void setUserId(Long userId) { this.userId = userId; } public BigDecimal getTotal() { return total; } public void setTotal(BigDecimal total) { this.total = total; } public BigDecimal getUsed() { return used; } public void setUsed(BigDecimal used) { this.used = used; } public BigDecimal getResidue() { return residue; } public void setResidue(BigDecimal residue) { this.residue = residue; } }
Seata 之 Account-Module 代码编写
Dao 接口实现
AccountDao
package demo.yangxu.springcloud.alibaba.dao; import org.apache.ibatis.annotations.Mapper; import org.apache.ibatis.annotations.Param; import java.math.BigDecimal; @Mapper public interface AccountDao { //扣减账户余额 void decrease(@Param("userId") Long userId, @Param("money") BigDecimal money); }
AccountMapper.xml
resources 文件夹下新建 mapper 文件夹后添加
<?xml version="1.0" encoding="UTF-8" ?> <!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd" > <!--
CREATE TABLE `t_account` (
`id` bigint(11) NOT NULL COMMENT 'id',
`user_id` bigint(11) DEFAULT NULL COMMENT '用户id',
`total` decimal(10,0) DEFAULT NULL COMMENT '总额度',
`used` decimal(10,0) DEFAULT NULL COMMENT '已用余额',
`residue` decimal(10,0) DEFAULT NULL COMMENT '剩余可用额度',
PRIMARY KEY (`id`) USING BTREE
) ENGINE=InnoDB DEFAULT CHARSET=utf8 ROW_FORMAT=DYNAMIC COMMENT='账户表';
--> <mapper namespace="demo.yangxu.springcloud.alibaba.dao.AccountDao"> <resultMap id="BaseResultMap" type="demo.yangxu.springcloud.alibaba.domain.Account"> <id column="id" property="id" jdbcType="BIGINT"/> <result column="user_id" property="userId" jdbcType="BIGINT"/> <result column="total" property="total" jdbcType="DECIMAL"/> <result column="used" property="used" jdbcType="DECIMAL"/> <result column="residue" property="residue" jdbcType="DECIMAL"/> </resultMap> <update id="decrease"> UPDATE t_account
SET residue = residue - #{money}, used = used + #{money}
WHERE user_id = #{userId}; </update> </mapper>
Service 接口及实现
AccountService
package demo.yangxu.springcloud.alibaba.service; import org.apache.ibatis.annotations.Param; import java.math.BigDecimal; public interface AccountService { //扣减账户余额 void decrease(Long userId, BigDecimal money); }
AccountServiceImpl
package demo.yangxu.springcloud.alibaba.service.impl; import demo.yangxu.springcloud.alibaba.dao.AccountDao; import demo.yangxu.springcloud.alibaba.service.AccountService; import lombok.extern.slf4j.Slf4j; import org.springframework.stereotype.Service; import javax.annotation.Resource; import java.math.BigDecimal; @Service @Slf4j public class AccountServiceImpl implements AccountService { @Resource private AccountDao accountDao; @Override public void decrease(Long userId, BigDecimal money) { log.info("------->account-service中扣减账户余额开始"); accountDao.decrease(userId, money); log.info("------->account-service中扣减账户余额结束"); } }
Controller
AccountController
package demo.yangxu.springcloud.alibaba.controller; import demo.yangxu.springcloud.alibaba.domain.CommonResult; import demo.yangxu.springcloud.alibaba.service.AccountService; import org.springframework.web.bind.annotation.GetMapping; import org.springframework.web.bind.annotation.PostMapping; import org.springframework.web.bind.annotation.RequestParam; import org.springframework.web.bind.annotation.RestController; import javax.annotation.Resource; import java.math.BigDecimal; @RestController public class AccountController { @Resource private AccountService accountService; //请求方式要与2001中的AccountService一致 //想取巧的话可以写 //@RequestMapping("/account/decrease") //交给Spring MVC自动判断 @PostMapping(value = "/account/decrease") public CommonResult decrease(@RequestParam("userId") Long userId,@RequestParam("money") BigDecimal money){ accountService.decrease(userId, money); return new CommonResult(200,"扣减账户余额成功!"); } }
Config 配置
MyBatisConfig
package demo.yangxu.springcloud.alibaba.config; import org.mybatis.spring.annotation.MapperScan; import org.springframework.context.annotation.Configuration; @Configuration @MapperScan({"demo.yangxu.springcloud.alibaba.dao"}) public class MyBatisConfig { }
DataSourceProxyConfig
package demo.yangxu.springcloud.alibaba.config; import com.alibaba.druid.pool.DruidDataSource; import io.seata.rm.datasource.DataSourceProxy; import org.apache.ibatis.session.SqlSessionFactory; import org.mybatis.spring.SqlSessionFactoryBean; import org.mybatis.spring.transaction.SpringManagedTransactionFactory; import org.springframework.beans.factory.annotation.Value; import org.springframework.boot.context.properties.ConfigurationProperties; import org.springframework.context.annotation.Bean; import org.springframework.context.annotation.Configuration; import org.springframework.core.io.support.PathMatchingResourcePatternResolver; import javax.sql.DataSource; /**
* 使用Seata对数据源进行代理
*/ @Configuration public class DataSourceProxyConfig { @Value("${mybatis.mapperLocations}") private String mapperLocations; @Bean @ConfigurationProperties(prefix = "spring.datasource") public DataSource druidDataSource(){ return new DruidDataSource(); } @Bean public DataSourceProxy dataSourceProxy(DataSource dataSource) { return new DataSourceProxy(dataSource); } @Bean public SqlSessionFactory sqlSessionFactoryBean(DataSourceProxy dataSourceProxy) throws Exception { SqlSessionFactoryBean sqlSessionFactoryBean = new SqlSessionFactoryBean(); sqlSessionFactoryBean.setDataSource(dataSourceProxy); sqlSessionFactoryBean.setMapperLocations(new PathMatchingResourcePatternResolver().getResources(mapperLocations)); sqlSessionFactoryBean.setTransactionFactory(new SpringManagedTransactionFactory()); return sqlSessionFactoryBean.getObject(); } }
主启动
SeataAccountMainApp2003
package demo.yangxu.springcloud.alibaba; import org.springframework.boot.SpringApplication; import org.springframework.boot.autoconfigure.SpringBootApplication; import org.springframework.boot.autoconfigure.jdbc.DataSourceAutoConfiguration; import org.springframework.cloud.client.discovery.EnableDiscoveryClient; import org.springframework.cloud.openfeign.EnableFeignClients; @EnableDiscoveryClient @EnableFeignClients @SpringBootApplication(exclude = DataSourceAutoConfiguration.class) public class SeataAccountMainApp2003 { public static void main(String[] args) { SpringApplication.run(SeataAccountMainApp2003.class,args); } }
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