7.2 spring cloud示例

7.2.1 关于本节

  • 本节内容为您介绍如何编译部署spring cloud业务端代码
  • 该示例包含4个服务
    • global
    • transfer
    • user
    • merchant

7.2.2 环境准备

  • JDK 1.8
  • Maven 3.x
  • txle server

7.2.3 运行示例

  1. 参照1.2 docker image部署的说明，安装部署txle server

  2. 运行如下命令创建业务代码所需要的数据库 

     $ docker exec -it backend-mysql bash
 # mysql -uroot -p123456
 mysql> create database db1;
 Query OK, 1 row affected (0.00 sec)

 mysql> create database db2;
 Query OK, 1 row affected (0.00 sec)

 mysql> create database db3;
 Query OK, 1 row affected (0.00 sec)
  3. 运行如下命令编译打包业务端代码 
     $ git clone git@github.com:actiontech/txle.git
 $ cd txle/examples/sample-txle-springcloud && \
 mvn clean package
  4. 运行业务端代码
    1. 运行eureka服务。打包好的jar在txle/examples/sample-txle-springcloud/sample-txle-springcloud-eureka/target/ 
      $ java -jar sample-txle-springcloud-eureka-0.0.1-SNAPSHOT.jar
    2. 运行global服务。打包好的jar在txle/examples/sample-txle-springcloud/sample-txle-springcloud-global/target/ 
       $ java -Dalpha.cluster.address=${txle_server_address}:8080 -jar sample-txle-springcloud-global-0.0.1-SNAPSHOT.jar
    3. 运行transfer服务。打包好的jar在txle/examples/sample-txle-springcloud/sample-txle-springcloud-transfer/target/ 
       $ java -Dalpha.cluster.address=${txle_server_address}:8080 -jar sample-txle-springcloud-transfer-0.0.1-SNAPSHOT.jar
    4. 运行user服务。打包好的jar在txle/examples/sample-txle-springcloud/sample-txle-springcloud-user/target/ 
       $ java -Dalpha.cluster.address=${txle_server_address}:8080 -jar sample-txle-springcloud-user-0.0.1-SNAPSHOT.jar
    5. 运行merchant服务。打包好的jar在txle/examples/sample-txle-springcloud/sample-txle-springcloud-merchant/target/ 
       $ java -Dalpha.cluster.address=${txle_server_address}:8080 -jar sample-txle-springcloud-merchant-0.0.1-SNAPSHOT.jar

7.1.4 使用工具发起全局事务

  1. 发起转账1元，转账将会成功 
    $ curl http://${host_address}:8000/testGlobalTransaction/1/1/1
$ ok

  2. 访问数据库查看账户余额
    txle_sample_transfer记录了一条交易成功的记录，txle_sample_user和txle_sample_merchant数据正常记录 

    $ docker exec -it backend-mysql bash
# mysql -uroot -p123456
mysql> select * from db1.txle_sample_transfer;
+----+--------+------------+---------+--------+--------+---------+---------------------+
| id | userid | merchantid | amount  | payway | status | version | createtime          |
+----+--------+------------+---------+--------+--------+---------+---------------------+
|  1 |      1 | 1          | 1.00000 |      1 |      1 |       0 | 2019-10-30 09:47:54 |
+----+--------+------------+---------+--------+--------+---------+---------------------+
1 row in set (0.00 sec)

mysql> select * from db2.txle_sample_user;
+----+------+-----------+---------+---------------------+
| id | name | balance   | version | createtime          |
+----+------+-----------+---------+---------------------+
|  1 | user | 999.00000 |       1 | 2019-10-30 09:47:30 |
+----+------+-----------+---------+---------------------+
1 row in set (0.00 sec)

mysql> select * from db3.txle_sample_merchant;
+----+----------+---------+---------+---------------------+
| id | name     | balance | version | createtime          |
+----+----------+---------+---------+---------------------+
|  1 | merchant | 1.00000 |       1 | 2019-10-30 09:47:31 |
+----+----------+---------+---------+---------------------+
1 row in set (0.00 sec)
  3. 根据示例代码里的设定发起转账金额大于200元，第二个子服务merchant会报错导致转账将会失败 
    $ curl http://${host_address}:8000/testGlobalTransaction/1/300/1
$ {"timestamp":1572429018848,"status":500,"error":"Internal Server Error","exception":"org.springframework.web.client.HttpServerErrorException","message":"500 null","path":"/testGlobalTransaction/1/300/1"}

  4. 访问数据库查看账户余额
    txle_sample_transfer记录了一条交易失败的记录，txle_sample_user和txle_sample_merchant数据回滚 

    $ docker exec -it backend-mysql bash
# mysql -uroot -p123456
mysql> select * from db1.txle_sample_transfer;
+----+--------+------------+-----------+--------+--------+---------+---------------------+
| id | userid | merchantid | amount    | payway | status | version | createtime          |
+----+--------+------------+-----------+--------+--------+---------+---------------------+
|  1 |      1 | 1          |   1.00000 |      1 |      1 |       0 | 2019-10-30 09:47:54 |
|  2 |      1 | 1          | 300.00000 |      1 |      2 |       0 | 2019-10-30 09:50:18 |
+----+--------+------------+-----------+--------+--------+---------+---------------------+
2 rows in set (0.00 sec)

mysql> select * from db2.txle_sample_user;
+----+------+-----------+---------+---------------------+
| id | name | balance   | version | createtime          |
+----+------+-----------+---------+---------------------+
|  1 | user | 999.00000 |       1 | 2019-10-30 09:47:30 |
+----+------+-----------+---------+---------------------+
1 row in set (0.00 sec)

mysql> select * from db3.txle_sample_merchant;
+----+----------+---------+---------+---------------------+
| id | name     | balance | version | createtime          |
+----+----------+---------+---------+---------------------+
|  1 | merchant | 1.00000 |       1 | 2019-10-30 09:47:31 |
+----+----------+---------+---------+---------------------+
1 row in set (0.01 sec)

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