一台Linux服务器，使用docker 部署多个 SeaTa服务（二）【spring boot整合seata1.4.0】

一、整合 spring boot

1、引入依赖

<!-- 分布式事务seata包 --> 
<!--seata begin--> 
<dependency> 
   <groupId>com.alibaba.cloud</groupId> 
   <artifactId>spring-cloud-starter-alibaba-seata</artifactId> 
   <version>2.1.3.RELEASE</version> 
   <exclusions> 
     <exclusion> 
        <groupId>io.seata</groupId> 
        <artifactId>seata-spring-boot-starter</artifactId> 
     </exclusion>    
   </exclusions> 
</dependency> 
<dependency> 
    <groupId>io.seata</groupId> 
    <artifactId>seata-spring-boot-starter</artifactId> 
    <version>1.4.2</version> 
</dependency> 
<!--seata end-->

2、初始化数据库

创建数据库，名称就叫seata;

branch_table表

CREATE TABLE branch_table (
branch_id bigint(20) NOT NULL,
xid varchar(128) NOT NULL,
transaction_id bigint(20) DEFAULT NULL,
resource_group_id varchar(32) DEFAULT NULL,
resource_id varchar(256) DEFAULT NULL,
branch_type varchar(8) DEFAULT NULL,
status tinyint(4) DEFAULT NULL,
client_id varchar(64) DEFAULT NULL,
application_data varchar(2000) DEFAULT NULL,
gmt_create datetime(6) DEFAULT NULL,
gmt_modified datetime(6) DEFAULT NULL,
PRIMARY KEY (branch_id),
KEY idx_xid (xid)
) ENGINE=InnoDB DEFAULT CHARSET=utf8;

global_table表

CREATE TABLE global_table (
xid varchar(128) NOT NULL,
transaction_id bigint(20) DEFAULT NULL,
status tinyint(4) NOT NULL,
application_id varchar(32) DEFAULT NULL,
transaction_service_group varchar(32) DEFAULT NULL,
transaction_name varchar(128) DEFAULT NULL,
timeout int(11) DEFAULT NULL,
begin_time bigint(20) DEFAULT NULL,
application_data varchar(2000) DEFAULT NULL,
gmt_create datetime DEFAULT NULL,
gmt_modified datetime DEFAULT NULL,
PRIMARY KEY (xid),
KEY idx_gmt_modified_status (gmt_modified,status),
KEY idx_transaction_id (transaction_id)
) ENGINE=InnoDB DEFAULT CHARSET=utf8;

lock_table表

CREATE TABLE lock_table (
row_key varchar(128) NOT NULL,
xid varchar(96) DEFAULT NULL,
transaction_id bigint(20) DEFAULT NULL,
branch_id bigint(20) NOT NULL,
resource_id varchar(256) DEFAULT NULL,
table_name varchar(32) DEFAULT NULL,
pk varchar(36) DEFAULT NULL,
gmt_create datetime DEFAULT NULL,
gmt_modified datetime DEFAULT NULL,
PRIMARY KEY (row_key),
KEY idx_branch_id (branch_id)
) ENGINE=InnoDB DEFAULT CHARSET=utf8;

3、 业务库表

seata需要在每个业务库添加一张undo_log表，用于AT模式下的二阶段回滚

undo_log表

CREATE TABLE undo_log (
branch_id bigint(20) NOT NULL COMMENT 'branch transaction id',
xid varchar(100) NOT NULL COMMENT 'global transaction id',
context varchar(128) NOT NULL COMMENT 'undo_log context,such as serialization',
rollback_info longblob NOT NULL COMMENT 'rollback info',
log_status int(11) NOT NULL COMMENT '0:normal status,1:defense status',
log_created datetime(6) NOT NULL COMMENT 'create datetime',
log_modified datetime(6) NOT NULL COMMENT 'modify datetime',
UNIQUE KEY ux_undo_log (xid,branch_id)
) ENGINE=InnoDB DEFAULT CHARSET=utf8 COMMENT='AT transaction mode undo table';

4、代理数据源

【注意：SeaTa的AT模式下必须使用代理数据源，但是SeaTa的TCC模式下必须不使用代理数据源，这里我们以AT模式为例子】

代理数据源配置如下：

package io.seata.samples.order.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.boot.context.properties.ConfigurationProperties;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.Primary;
import org.springframework.core.io.support.PathMatchingResourcePatternResolver;

import javax.sql.DataSource;

@Configuration
public class DataSourceConfig {

    @Bean
    @ConfigurationProperties(prefix = "spring.datasource")
    public DataSource druidDataSource() {
        DruidDataSource druidDataSource = new DruidDataSource();
        return druidDataSource;
    }

    @Primary
    @Bean("dataSource")
    public DataSourceProxy dataSource(DataSource druidDataSource) {
        return new DataSourceProxy(druidDataSource);
    }

    @Bean
    public SqlSessionFactory sqlSessionFactory(DataSourceProxy dataSourceProxy) throws Exception {
        SqlSessionFactoryBean factoryBean = new SqlSessionFactoryBean();
        factoryBean.setDataSource(dataSourceProxy);
        factoryBean.setMapperLocations(new PathMatchingResourcePatternResolver()
            .getResources("classpath*:/mapper/*.xml"));
        factoryBean.setTransactionFactory(new SpringManagedTransactionFactory());
        return factoryBean.getObject();
    }
}

5、配置文件

spring.application.name=order-service
server.port=8082
spring.datasource.url=jdbc:mysql://localhost:3306/seata_order?useSSL=false&serverTimezone=UTC
spring.datasource.username=root
spring.datasource.password=root
#!!!分布式事务组，这个要与file.conf 中 service 里的  vgroup_mapping.my_test_tx_group 一样才行
spring.cloud.alibaba.seata.tx-service-group=my_test_tx_group
logging.level.io.seata=info
logging.level.io.seata.samples.order.persistence.OrderMapper=debug

二、微服务项目中的配置

1、在每个微服务里面都放入 registry.conf 和 file.conf 两个文件

2、修改registry.conf文件

registry {
  # file 、nacos 、eureka、redis、zk、consul、etcd3、sofa、custom
  # type = "file"
  # 这里我们用nacos  
  type = "nacos"

 #这里是nacos 的一些配置项
  nacos {
    application = "seata-server"
    serverAddr = "cdh1"
    namespace = "e385bfe2-e743-4910-8c32-e05759f9f9f4"
    cluster = "SEATA_GROUP"
    username = "nacos"
    password = "nacos"
  }
  eureka {
    serviceUrl = "http://localhost:8761/eureka"
    weight = "1"
  }
  redis {
    serverAddr = "localhost:6379"
    db = "0"
    password = ""
    timeout = "0"
  }
  zk {
    serverAddr = "127.0.0.1:2181"
    sessionTimeout = 6000
    connectTimeout = 2000
    username = ""
    password = ""
  }
  consul {
    serverAddr = "127.0.0.1:8500"
    aclToken = ""
  }
  etcd3 {
    serverAddr = "http://localhost:2379"
  }
  sofa {
    serverAddr = "127.0.0.1:9603"
    region = "DEFAULT_ZONE"
    datacenter = "DefaultDataCenter"
    group = "SEATA_GROUP"
    addressWaitTime = "3000"
  }
  file {
    name = "file.conf"
  }
  custom {
    name = ""
  }
}

config {
  # file、nacos 、apollo、zk、consul、etcd3、springCloudConfig、custom
  # 配置项我们依然用file  ，也就是刚才我们每个微服务里都放了的 file.conf
  type = "file"

  nacos {
    serverAddr = "127.0.0.1:8848"
    namespace = ""
    group = "SEATA_GROUP"
    username = ""
    password = ""
    dataId = "seata.properties"
  }
  consul {
    serverAddr = "127.0.0.1:8500"
    aclToken = ""
  }
  apollo {
    appId = "seata-server"
    apolloMeta = "http://192.168.1.204:8801"
    namespace = "application"
    apolloAccesskeySecret = ""
  }
  zk {
    serverAddr = "127.0.0.1:2181"
    sessionTimeout = 6000
    connectTimeout = 2000
    username = ""
    password = ""
    nodePath = "/seata/seata.properties"
  }
  etcd3 {
    serverAddr = "http://localhost:2379"
  }
  file {
    name = "file.conf"
  }
  custom {
    name = ""
  }
}

3、file.conf本地配置

如果配置中心的类型都不是file时，就不需要file.conf文件了
如果配置中心的类型是file时，就需要file.conf

transport {
  # tcp udt unix-domain-socket
  type = "TCP"
  #NIO NATIVE
  server = "NIO"
  #enable heartbeat
  heartbeat = true
  # the client batch send request enable
  enableClientBatchSendRequest = true
  #thread factory for netty
  threadFactory {
    bossThreadPrefix = "NettyBoss"
    workerThreadPrefix = "NettyServerNIOWorker"
    serverExecutorThread-prefix = "NettyServerBizHandler"
    shareBossWorker = false
    clientSelectorThreadPrefix = "NettyClientSelector"
    clientSelectorThreadSize = 1
    clientWorkerThreadPrefix = "NettyClientWorkerThread"
    # netty boss thread size,will not be used for UDT
    bossThreadSize = 1
    #auto default pin or 8
    workerThreadSize = "default"
  }
  shutdown {
    # when destroy server, wait seconds
    wait = 3
  }
  serialization = "seata"
  compressor = "none"
}
service {
  #transaction service group mapping
  # my_test_tx_group为分组名称，需要与应用中的配置分组名称一致
  # "default"为seata-server的集群名称，即seata-server注册到注册中心的名称
  vgroupMapping.my_test_tx_group = "default"
  #only support when registry.type=file, please don't set multiple addresses
  # 当registry.type=file时，客户端通过ip:port连接到seata-server
  default.grouplist = "127.0.0.1:8091"
  #degrade, current not support
  enableDegrade = false
  #disable seata
  disableGlobalTransaction = false
}

client {
  rm {
    asyncCommitBufferLimit = 10000
    lock {
      retryInterval = 10
      retryTimes = 30
      retryPolicyBranchRollbackOnConflict = true
    }
    reportRetryCount = 5
    tableMetaCheckEnable = false
    reportSuccessEnable = false
  }
  tm {
    commitRetryCount = 5
    rollbackRetryCount = 5
  }
  undo {
    dataValidation = true
    logSerialization = "jackson"
    # undo表名称,SEATA AT模式需要UNDO_LOG表
    logTable = "undo_log"
  }
  log {
    exceptionRate = 100
  }
}

到此配置完成！