Spring Cloud Alibaba配置搭建 Seata案例--帐户

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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