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阿里分布式事务Seata

2020年04月12日 星期日, 发表于 海南 海口

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(一) seata 介绍

(二) Seata server 安装配置

环境准备

GitHub 下载v1.1.0 Seata v1.1.0

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## transaction log store, only used in seata-server
store {
  ## store mode: file、db
  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) etc.
    datasource = "dbcp"
    ## mysql/oracle/h2/oceanbase etc.
    dbType = "mysql"
    driverClassName = "com.mysql.cj.jdbc.Driver"
    url = "jdbc:mysql://localhost:3306/seat-server"
    user = "root"
    password = "root"
    minConn = 1
    maxConn = 10
    globalTable = "global_table"
    branchTable = "branch_table"
    lockTable = "lock_table"
    queryLimit = 100
  }


service {
  #transaction service group mapping
  vgroupMapping.licaibo_tx_group = "default"
  #only support when registry.type=file, please don't set multiple addresses
  default.grouplist = "127.0.0.1:8091"
  #degrade, current not support
  enableDegrade = false
  #disable seata
  disableGlobalTransaction = false
}

}

在自己的seat-server数据库需要创建三张表，具体脚本在 Seata-mysql-script

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-- -------------------------------- The script used when storeMode is 'db' --------------------------------
-- the table to store GlobalSession data
CREATE TABLE IF NOT EXISTS `global_table`
(
    `xid`                       VARCHAR(128) NOT NULL,
    `transaction_id`            BIGINT,
    `status`                    TINYINT      NOT NULL,
    `application_id`            VARCHAR(32),
    `transaction_service_group` VARCHAR(32),
    `transaction_name`          VARCHAR(128),
    `timeout`                   INT,
    `begin_time`                BIGINT,
    `application_data`          VARCHAR(2000),
    `gmt_create`                DATETIME,
    `gmt_modified`              DATETIME,
    PRIMARY KEY (`xid`),
    KEY `idx_gmt_modified_status` (`gmt_modified`, `status`),
    KEY `idx_transaction_id` (`transaction_id`)
) ENGINE = InnoDB
  DEFAULT CHARSET = utf8;

-- the table to store BranchSession data
CREATE TABLE IF NOT EXISTS `branch_table`
(
    `branch_id`         BIGINT       NOT NULL,
    `xid`               VARCHAR(128) NOT NULL,
    `transaction_id`    BIGINT,
    `resource_group_id` VARCHAR(32),
    `resource_id`       VARCHAR(256),
    `branch_type`       VARCHAR(8),
    `status`            TINYINT,
    `client_id`         VARCHAR(64),
    `application_data`  VARCHAR(2000),
    `gmt_create`        DATETIME(6),
    `gmt_modified`      DATETIME(6),
    PRIMARY KEY (`branch_id`),
    KEY `idx_xid` (`xid`)
) ENGINE = InnoDB
  DEFAULT CHARSET = utf8;

-- the table to store lock data
CREATE TABLE IF NOT EXISTS `lock_table`
(
    `row_key`        VARCHAR(128) NOT NULL,
    `xid`            VARCHAR(96),
    `transaction_id` BIGINT,
    `branch_id`      BIGINT       NOT NULL,
    `resource_id`    VARCHAR(256),
    `table_name`     VARCHAR(32),
    `pk`             VARCHAR(36),
    `gmt_create`     DATETIME,
    `gmt_modified`   DATETIME,
    PRIMARY KEY (`row_key`),
    KEY `idx_branch_id` (`branch_id`)
) ENGINE = InnoDB
  DEFAULT CHARSET = utf8;

修改registry.conf,配置注册的Eureka注册中心

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registry {
  # file 、nacos 、eureka、redis、zk、consul、etcd3、sofa
  type = "eureka"

  nacos {
    serverAddr = "localhost"
    namespace = ""
    cluster = "default"
  }
  eureka {
    serviceUrl = "http://localhost:9001/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 = ""
    group = "SEATA_GROUP"
  }
  consul {
    serverAddr = "127.0.0.1:8500"
  }
  apollo {
    app.id = "seata-server"
    apollo.meta = "http://192.168.1.204:8801"
    namespace = "application"
  }
  zk {
    serverAddr = "127.0.0.1:2181"
    session.timeout = 6000
    connect.timeout = 2000
  }
  etcd3 {
    serverAddr = "http://localhost:2379"
  }
  file {
    name = "file.conf"
  }
}

(三) SpringBoot/SpringClod集成Seata

在各个微服务的SpringBoot增加依赖

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        <dependencys>
            <dependency>
                <groupId>com.alibaba.cloud</groupId>
                <artifactId>spring-cloud-alibaba-seata</artifactId>
                <version>2.1.0.RELEASE</version>
                <exclusions>
                    <exclusion>
                        <artifactId>seata-all</artifactId>
                        <groupId>io.seata</groupId>
                    </exclusion>
                </exclusions>
            </dependency>
            <dependency>
                <groupId>io.seata</groupId>
                <artifactId>seata-all</artifactId>
                <version>1.1.0</version>
            </dependency>
         </dependencys>

在每个微服务的数据库创建undo_log,用于执行回滚记录;具体脚本在 Seata-mysql-script

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-- for AT mode you must to init this sql for you business database. the seata server not need it.
CREATE TABLE IF NOT EXISTS `undo_log`
(
    `id`            BIGINT(20)   NOT NULL AUTO_INCREMENT COMMENT 'increment id',
    `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     NOT NULL COMMENT 'create datetime',
    `log_modified`  DATETIME     NOT NULL COMMENT 'modify datetime',
    PRIMARY KEY (`id`),
    UNIQUE KEY `ux_undo_log` (`xid`, `branch_id`)
) ENGINE = InnoDB
  AUTO_INCREMENT = 1
  DEFAULT CHARSET = utf8 COMMENT ='AT transaction mode undo table';

resources目录下增加file.conf和registry.conf两个配置文件

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           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
             vgroupMapping.licaibo_tx_group = "default"
             #only support when registry.type=file, please don't set multiple addresses
             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"
               logTable = "undo_log"
             }
             log {
               exceptionRate = 100
             }
           }

SpringBoot配置registry.conf

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      registry {
        # file 、nacos 、eureka、redis、zk、consul、etcd3、sofa
        type = "eureka"
      
        nacos {
          serverAddr = "localhost"
          namespace = ""
          cluster = "default"
        }
        eureka {
          serviceUrl = "http://localhost:9001/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 = ""
          group = "SEATA_GROUP"
        }
        consul {
          serverAddr = "127.0.0.1:8500"
        }
        apollo {
          app.id = "seata-server"
          apollo.meta = "http://192.168.1.204:8801"
          namespace = "application"
        }
        zk {
          serverAddr = "127.0.0.1:2181"
          session.timeout = 6000
          connect.timeout = 2000
        }
        etcd3 {
          serverAddr = "http://localhost:2379"
        }
        file {
          name = "file.conf"
        }
      }

配置SpringBoot工程的application.yml

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spring:
  cloud:
    alibaba:
      seata:
        tx-service-group: licaibo_tx_group

创建数据源代理

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/**
 * 数据源代理
 * @author wangzhongxiang
 */
@Configuration
public class DataSourceConfiguration {

    @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 sqlSessionFactoryBean = new SqlSessionFactoryBean();
        sqlSessionFactoryBean.setDataSource(dataSourceProxy);
        sqlSessionFactoryBean.setMapperLocations(new PathMatchingResourcePatternResolver()
        .getResources("classpath*:/mapper/*.xml"));
        sqlSessionFactoryBean.setTransactionFactory(new SpringManagedTransactionFactory());
        return sqlSessionFactoryBean.getObject();
    }

}

(四) 启动测试

(五) 更多集成方式例子

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