primary key do not work after implementing Shard- ingKeyGenerator interface and configuring type property? . . . . . . . . . . . . . . 299 7.17 How to solve that data encryption can’t work with JPA? . . make configurations difficult to maintain. Inline expressions can simplify data node configuration work. Java codes are not helpful in the unified management of common configurations. Writing sharding generated with snowflake algorithm, binary form has 4 parts, 1 bit sign, 41bit times‐ tamp, 10bit work ID and 12bit sequence number from high to low. • sign bit (1bit) Reserved sign bit, constantly to

. . . . . . . . . . 307 7.7.14 14. [Sharding] Why does my custom distributed primary key do not work after implementing KeyGenerateAlgorithm interface and configuring type prop‐ erty? . . . . . . . . . . . . . . . . . . . . 307 7.7.16 16. [Encryption] How to solve that data encryption can’t work with JPA? . 308 7.7.17 17. [DistSQL] How to set custom JDBC connection properties or connection pool DistSQL enables users to operate Apache ShardingSphere like a database, transforming it from a frame‐ work and middleware for developers to a database product for DBAs. DistSQL is divided into RDL, RQL and

. . . . . . . . . . . . 349 7.8.15 [Sharding] Why does my custom distributed primary key do not work after im‐ plementing KeyGenerateAlgorithm interface and configuring type property?349 7.8.16 [Sharding] . . . . . . . . . . . . . . . . 350 7.8.17 [Encryption] How to solve that data encryption can’t work with JPA? . . . 350 7.8.18 [DistSQL] How to set custom JDBC connection properties or connection pool DistSQL enables users to operate Apache ShardingSphere like a database, transforming it from a frame‐ work and middleware for developers to a database product for DBAs. DistSQL is divided into RDL, RQL and

是一个 确保 SqlSession 关闭的标准模式： SqlSession session = sqlSessionFactory.openSession(); try { // do work } finally { session.close(); } 在你的所有的代码中一致性地使用这种模式来保证所有数据库资源都能被正确地关闭。 映射器实例（ 映射器实例（Mapper Instances） sqlSessionFactory.openSession(); try { BlogMapper mapper = session.getMapper(BlogMapper.class); // do work } finally { session.close(); } Copyright © 2010–2015 MyBatis.org. All rights reserved. PDFmyURL WHERE ID = #{id} 最近更新: 24 五月 2015 最近更新: 24 五月 2015 || 版本: 3.3.0 版本: 3.3.0 Your visitors can save your web pages as PDF in one click with http://pdfmyurl.com! 项目文档 项目文档 项目文档 项目文档 项目信息 项目信息

actual development work. This chapter explains how to set up a working environment for MyBatis. MyBatis Installation Carry out the following simple steps to install MyBatis on your machine − Download we would pass Student object as a parameter, while calling insert method of SqlSession class. If your database table uses an IDENTITY, AUTO_INCREMENT, or SERIAL column, or you have defined a SEQUENCE/GENERATOR Hibernate. Both the technologies work well, given their specific domain. MyBatis is suggested in case − You want to create your own SQL's and you are willing to maintain them. Your environment is driven by relational

├──schema # 表结构配置 ├──states ├ ├──proxynodes ├ ├ ├──${your_instance_ip_a}@${your_instance_pid_x}@${UUID} ├ ├ ├──${your_instance_ip_b}@${your_instance_pid_y}@${UUID} ├ ├ ├──.... ├ ├──datanodes ├ ├ 表示 启用。 Zookeeper 命令如下： [zk: localhost:2181(CONNECTED) 0] set /${your_zk_namespace}/states/proxynodes/$ {your_instance_ip_a}@${your_instance_pid_x}@${UUID} DISABLED 3.4. 分布式治理 67 Apache ShardingSphere 或节点表示启用。 Zookeeper 命令如下： [zk: localhost:2181(CONNECTED) 0] set /${your_zk_namespace}/states/datanodes/$ {your_schema_name}/${your_replica_datasource_name} DISABLED 第三方组件依赖 Apache ShardingSphere 在数据库治理模块使用

. . . . . . . . . . . . . . 497 8.3.8 Sharding Why does my custom distributed primary key do not work after imple‐ menting KeyGenerateAlgorithm interface and configuring type property? . 498 8.3.9 Sharding . . . . . . . . . . . . . . . . . . 498 8.4.1 Encryption How to solve that data encryption can’t work with JPA? . . . . 498 8.5 DistSQL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . and computing platform. Guar‐ antee the HA of your distributed database cluster with ShardingSphere’s Operator on Ku‐ bernetes, and the native HA of your existing data sources. Data Mi‐ gra‐ tion

. . . . . . . . . . . . 361 7.8.15 [Sharding] Why does my custom distributed primary key do not work after im‐ plementing KeyGenerateAlgorithm interface and configuring type property?361 7.8.16 [Sharding] . . . . . . . . . . . . . . . . 362 7.8.17 [Encryption] How to solve that data encryption can’t work with JPA? . . . 362 7.8.18 [DistSQL] How to set custom JDBC connection properties or connection pool DistSQL enables users to operate Apache ShardingSphere like a database, transforming it from a frame‐ work and middleware for developers to a database product for DBAs. DistSQL is divided into RDL, RQL and

. . . . . . . . . . . . . 551 13.4.8 Sharding Why does my custom distributed primary key do not work after imple‐ menting KeyGenerateAlgorithm interface and configuring type property? . 551 13.4.9 through the shadow database function. Execute your load testing scenarios in a production environment without worrying about test data pollut‐ ing your production data. 1.3 Advantages • Ultimate Performance Another challenge is that SQL that works correctly in one single‐node database does not necessarily work correctly in a sharded database. For example, table splitting results in table name changes, or incorrect

├ ├ ├ ├──${your_instance_ip_a}@${your_instance_port_x} ├ ├ ├ ├──${your_instance_ip_b}@${your_instance_port_y} ├ ├ ├ ├──.... ├ ├ ├──circuit_breaker ├ ├ ├ ├──${your_instance_ip_c}@${your_instance_port_v} rt_v} ├ ├ ├ ├──${your_instance_ip_d}@${your_instance_port_w} ├ ├ ├ ├──.... ├ ├──storage_nodes ├ ├ ├──disable ├ ├ ├ ├──${schema_1.ds_0} ├ ├ ├ ├──${schema_1.ds_1} ├ ├ ├ ├──.... ├ ├ ├──primary ├ Zookeeper 命令如下： [zk: localhost:2181(CONNECTED) 0] set /${your_zk_namespace}/status/compute_nodes/ circuit_breaker/${your_instance_ip_a}@${your_instance_port_x} DISABLED 禁用从库 在读写分离场景下，可在数据源名称子节点中写入