14.Spring Cloud Alibaba学习笔记--Seata案例--帐户

Seata 之 Account-Module 配置搭建

建 Module

seata-account-service2003

改 POM

<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>cloud2020artifactId>
        <groupId>demo.yangxu.springcloudgroupId>
        <version>1.0-SNAPSHOTversion>
    parent>
    <modelVersion>4.0.0modelVersion>

    <artifactId>seata-account-service2003artifactId>

    <dependencies>
        
        <dependency>
            <groupId>com.alibaba.cloudgroupId>
            <artifactId>spring-cloud-starter-alibaba-nacos-discoveryartifactId>
        dependency>
        
        <dependency>
            <groupId>com.alibaba.cloudgroupId>
            <artifactId>spring-cloud-starter-alibaba-seataartifactId>
            <exclusions>
                <exclusion>
                    <artifactId>seata-allartifactId>
                    <groupId>io.seatagroupId>
                exclusion>
            exclusions>
        dependency>
        <dependency>
            <groupId>io.seatagroupId>
            <artifactId>seata-allartifactId>
            <version>0.9.0version>
        dependency>
        
        <dependency>
            <groupId>org.springframework.cloudgroupId>
            <artifactId>spring-cloud-starter-openfeignartifactId>
        dependency>
        <dependency>
            <groupId>org.springframework.bootgroupId>
            <artifactId>spring-boot-starter-webartifactId>
        dependency>
        <dependency>
            <groupId>org.springframework.bootgroupId>
            <artifactId>spring-boot-starter-testartifactId>
            <scope>testscope>
        dependency>
        <dependency>
            <groupId>org.mybatis.spring.bootgroupId>
            <artifactId>mybatis-spring-boot-starterartifactId>
            <version>2.0.0version>
        dependency>
        <dependency>
            <groupId>mysqlgroupId>
            <artifactId>mysql-connector-javaartifactId>
            <version>5.1.37version>
        dependency>
        <dependency>
            <groupId>com.alibabagroupId>
            <artifactId>druid-spring-boot-starterartifactId>
            <version>1.1.10version>
        dependency>
        <dependency>
            <groupId>org.projectlombokgroupId>
            <artifactId>lombokartifactId>
            <optional>trueoptional>
        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

<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);
    }
}