Spring專題

在Spring中使用jOOQ源碼案例

雖然ORM大部分性能問題是由開發者自己引起的，以只讀方式使用ORM是不值得的，現在有一種其他可選方式，使用JOOQ，jOOQ從您的數據庫生成Java代碼，并允許您通過它流暢的API構建類型安全的SQL查詢。

依賴包：

Spring Framework?3.2.6. 使用其?aop,?beans,?core,?context,?context-support,?jdbc, 和?tx?模塊.

BoneCP?0.8.0. 作為數據庫連接池

jOOQ?3.2.2.

H2?1.3.174. 作為案例的數據庫.

pom.xml的配置：

org.springframework

spring-aop

3.2.6.RELEASE

org.springframework

spring-beans

3.2.6.RELEASE

org.springframework

spring-core

3.2.6.RELEASE

org.springframework

spring-context

3.2.6.RELEASE

org.springframework

spring-context-support

3.2.6.RELEASE

org.springframework

spring-expression

3.2.6.RELEASE

org.springframework

spring-jdbc

3.2.6.RELEASE

org.springframework

spring-tx

3.2.6.RELEASE

cglib

cglib

3.1

com.jolbox

bonecp

0.8.0.RELEASE

org.jooq

jooq

3.2.2

com.h2database

h2

1.3.174

DB 連接配置:

#Database Configuration

db.driver=org.h2.Driver

db.url=jdbc:h2:target/jooq-example

db.username=sa

db.password=

#jOOQ Configuration

jooq.sql.dialect=H2

#DB Schema

db.schema.script=schema.sql

負責持久的PersistenceContext?：

@Configuration

@ComponentScan({"net.petrikainulainen.spring.jooq.todo"})

@EnableTransactionManagement

@PropertySource("classpath:application.properties")

public?class?PersistenceContext?{

@Autowired

private?Environment?env;

@Bean(destroyMethod?=?"close")

public?DataSource dataSource()?{

BoneCPDataSource dataSource?=?new?BoneCPDataSource();

dataSource.setDriverClass(env.getRequiredProperty("db.driver"));

dataSource.setJdbcUrl(env.getRequiredProperty("db.url"));

dataSource.setUsername(env.getRequiredProperty("db.username"));

dataSource.setPassword(env.getRequiredProperty("db.password"));

return?dataSource;

}

@Bean

public?LazyConnectionDataSourceProxy lazyConnectionDataSource()?{

return?new?LazyConnectionDataSourceProxy(dataSource());

}

@Bean

public?TransactionAwareDataSourceProxy transactionAwareDataSource()?{

return?new?TransactionAwareDataSourceProxy(lazyConnectionDataSource());

}

@Bean

public?DataSourceTransactionManager transactionManager()?{

return?new?DataSourceTransactionManager(lazyConnectionDataSource());

}

@Bean

public?DataSourceConnectionProvider connectionProvider()?{

return?new?DataSourceConnectionProvider(transactionAwareDataSource());

}

@Bean

public?JOOQToSpringExceptionTransformer jooqToSpringExceptionTransformer()?{

return?new?JOOQToSpringExceptionTransformer();

}

@Bean

public?DefaultConfiguration configuration()?{

DefaultConfiguration jooqConfiguration?=?new?DefaultConfiguration();

jooqConfiguration.set(connectionProvider());

jooqConfiguration.set(new?DefaultExecuteListenerProvider(

jooqToSpringExceptionTransformer()

));

String?sqlDialectName?=?env.getRequiredProperty("jooq.sql.dialect");

SQLDialect dialect?=?SQLDialect.valueOf(sqlDialectName);

jooqConfiguration.set(dialect);

return?jooqConfiguration;

}

@Bean

public?DefaultDSLContext dsl()?{

return?new?DefaultDSLContext(configuration());

}

@Bean

public?DataSourceInitializer dataSourceInitializer()?{

DataSourceInitializer initializer?=?new?DataSourceInitializer();

initializer.setDataSource(dataSource());

ResourceDatabasePopulator populator?=?new?ResourceDatabasePopulator();

populator.addScript(

new?ClassPathResource(env.getRequiredProperty("db.schema.script"))

);

initializer.setDatabasePopulator(populator);

return?initializer;

}

}

將jOOQ Exceptions 傳遞到 Spring DataAccessExceptions

import?org.jooq.ExecuteContext;

import?org.jooq.SQLDialect;

import?org.jooq.impl.DefaultExecuteListener;

import?org.springframework.jdbc.support.SQLErrorCodeSQLExceptionTranslator;

import?org.springframework.jdbc.support.SQLExceptionTranslator;

import?org.springframework.jdbc.support.SQLStateSQLExceptionTranslator;

public?class?JOOQToSpringExceptionTransformer?extends?DefaultExecuteListener?{

@Override

public?void?exception(ExecuteContext ctx)?{

SQLDialect dialect?=?ctx.configuration().dialect();

SQLExceptionTranslator translator?=?(dialect?!=?null)

??new?SQLErrorCodeSQLExceptionTranslator(dialect.name())

:?new?SQLStateSQLExceptionTranslator();

ctx.exception(translator.translate("jOOQ", ctx.sql(), ctx.sqlException()));

}

}

以上案例的源碼下載：at Github.

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