SpringBoot整合阿里Druid数据源及Spring-Data-Jpa

最近开辟了一个新项目,因为初期考虑到可能会调整数据库的风险,所以orm,在设计之初就考虑为Spring Data Jpa, 以下是工程data层数据,整体是参照配置多数据源的方案,进行配置的

目录

  • 因为阿里数据源Druid
  • 整合数据源及其他事务配置
  • pom依赖

整合事务

@EnableAutoConfiguration
@SpringBootApplication
@EnableTransactionManagement
@ComponentScan(basePackages = {"com.inn.developer"})
public class CodeApplication {
    public static void main(String[] args) {
        new SpringApplicationBuilder().web(true).sources(CodeApplication.class).run(args);
    }
}

创建DruidProperties配置

@Data
@AllArgsConstructor
@NoArgsConstructor
@ConfigurationProperties(prefix = "druid")
public class DruidProperties {
...

数据库参数可以参考:

参数 默认值 解释
initialSize 3 初始化配置
minIdle 3 最小连接数
maxActive 15 最大连接数
maxWait 5000 获取连接超时时间(单位:ms)
timeBetweenEvictionRunsMillis 90000 连接有效性检测时间(单位:ms)
testOnBorrow false 获取连接检测
testOnReturn false 归还连接检测
minEvictableIdleTimeMillis 1800000 最大空闲时间(单位ms)
testWhileIdle true 在获取连接后,确定是否要进行连接空间时间的检查
  • 配置说明:

1:minEvictableIdleTimeMillis(最大空闲时间):默认为30分钟,配置里面不进行设置。

2:testOnBorrow ,testOnReturn 默认为关闭,可以设置为不配置。

3:testWhileIdle(在获取连接后,确定是否要进行连接空闲时间的检查)。默认为true。配置里面不再进行设置。

  • 流程说明:

1:在第一次调用connection的时候,才会进行 initialSize的初始化。

2:心跳检测时间线程,会休眠timeBetweenEvictionRunsMillis时间,然后只对(没有borrow的线程 减去 minIdle)的线程进行检查,如果空闲时间大于minEvictableIdleTimeMillis则进行close。

3:testWhileIdle必须设置为true,在获取到连接后,先检查testOnBorrow,然后再判定testwhileIdle,如果连接空闲时间大于timeBetweenEvictionRunsMillis,则会进行心跳检测。

4:不需要配置validationQuery,如果不配置的情况下会走ping命令,性能更高。

5:连接保存在数组里面,获取连接的时候,获取数组的最后一位。在imeBetweenEvictionRunsMillis时是从前往后进行检查连接的有效性。

配置数据源及hibernate适配

数据源对象创建还是和之前一样,
笔者不太喜欢xml的方式,所以还是采用配置类

DruidAutoJpaConfiguration

@Configuration
@EnableConfigurationProperties(DruidProperties.class)//开启属性注入,通过@autowired注入
@ConditionalOnClass(DruidDataSource.class)//表示对应的类在classpath目录下存在时,才会去解析对应的配置文件
@ConditionalOnProperty(prefix = "druid", name = "url")
@EnableJpaRepositories(basePackages = "com.inn.developer.model.dao",transactionManagerRef = "jpaTransactionManager", entityManagerFactoryRef = "localContainerEntityManagerFactoryBean")
public class DruidAutoJpaConfiguration {
    @Autowired
    private DruidProperties properties;

    @Bean(name = "druidDataSource")
    @Primary
    public DataSource dataSource() {
        DruidDataSource dataSource = new DruidDataSource();
        dataSource.setUrl(properties.getUrl());
        dataSource.setUsername(properties.getUsername());
        dataSource.setPassword(properties.getPassword());
        dataSource.setTimeBetweenEvictionRunsMillis(properties.getTimeBetweenEvictionRunsMillis());
        if (properties.getInitialSize() > 0) {
            dataSource.setInitialSize(properties.getInitialSize());
        }
        if (properties.getMinIdle() > 0) {
            dataSource.setMinIdle(properties.getMinIdle());
        }
        if (properties.getMaxActive() > 0) {
            dataSource.setMaxActive(properties.getMaxActive());
        }
        dataSource.setTestOnBorrow(properties.isTestOnBorrow());
        dataSource.setValidationQuery("select version()");
        try {
            dataSource.init();
        } catch (SQLException e) {
            throw new RuntimeException(e);
        }
        return dataSource;
    }


    /**
     * hibernate 适配器,定制方言为mysql,并打印sql
     *
     * @return
     */
    @Bean(name = "hibernateJpaVendorAdapter")
    @Primary
    public HibernateJpaVendorAdapter hibernateJpaVendorAdapter() {
        HibernateJpaVendorAdapter hibernateJpaVendorAdapter = new HibernateJpaVendorAdapter();
        hibernateJpaVendorAdapter.setShowSql(true);
        hibernateJpaVendorAdapter.setDatabasePlatform("org.hibernate.dialect.MySQL5Dialect");
        return hibernateJpaVendorAdapter;
    }

    @Bean(name = "localContainerEntityManagerFactoryBean")
    @Primary
    public LocalContainerEntityManagerFactoryBean entityManagerFactoryBean(@Qualifier("druidDataSource") DataSource dataSource
            ,@Qualifier("hibernateJpaVendorAdapter") HibernateJpaVendorAdapter hibernateJpaVendorAdapter) {
        LocalContainerEntityManagerFactoryBean local = new LocalContainerEntityManagerFactoryBean();
        local.setDataSource(dataSource);
        local.setJpaVendorAdapter(hibernateJpaVendorAdapter);
        local.setPackagesToScan("com.inn.developer.model.domain");
        Properties properties = new Properties();
        properties.put("hibernate.format_sql", true);
        properties.put("hibernate.hbm2ddl.auto", "update");
        local.setJpaProperties(properties);
        return local;
    }

    @Bean(name = "jpaTransactionManager")
    @Primary
    public JpaTransactionManager jpaTransactionManager(@Qualifier("localContainerEntityManagerFactoryBean") LocalContainerEntityManagerFactoryBean entityManagerFactoryBean) {
        JpaTransactionManager jpaTransactionManager = new JpaTransactionManager();
        EntityManagerFactory object = entityManagerFactoryBean.getObject();
        jpaTransactionManager.setEntityManagerFactory(object);
        return jpaTransactionManager;
    }

pom依赖

 
            mysql
            mysql-connector-java
        
        
            org.springframework.boot
            spring-boot-starter-data-jpa
        
        
         
            org.projectlombok
            lombok
            1.16.6
            provided
        
        
          
            com.alibaba
            druid
            1.0.11
        
        
         
        
            org.springframework.data
            spring-data-jpa
            1.11.3.RELEASE
        

        
        
            org.hibernate
            hibernate-entitymanager
            5.2.5.Final
        

        
        
            org.hibernate
            hibernate-core
            5.2.11.Final
        
        
        
            org.hibernate
            hibernate-annotations
            3.5.6-Final
                
                


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