Spring Boot Hikari属性以编程方式重写

Question

我的 Spring 启动应用程序中有两个数据源，因此我无法使用标准数据源。其中之一的定义如下：

vertica:
  datasource:
    jdbc-url: jdbc:vertica://${DR_HOST}:${DR_PORT}/${DR_DB_NAME}
    username: ${DR_USER}
    password: ${DR_PASSWORD}
    driver-class-name: com.vertica.jdbc.Driver
    hikari:
      connectionTimeout: 30000
      idleTimeout: 10000
      maxLifetime: 10000
      keepaliveTime: 5000
      maximumPoolSize: 20
      minimumIdle: 5
      #poolName: vertica-db-pool
      #username: ${DB_USER}
      #password: ${DB_PASSWORD}
  jpa:
    hibernate:
      ddl-auto: none
      format_sql: true
      show-sql: true
      naming:
        physical-strategy: org.hibernate.boot.model.naming.PhysicalNamingStrategyStandardImpl
      naming-strategy: org.hibernate.cfg.ImprovedNamingStrategy
    properties:
      hibernate:
        dialect: org.hibernate.dialect.VerticaDialect

@Configuration
@ConfigurationProperties("vertica.datasource")
@EnableTransactionManagement
@EnableJpaRepositories(
        entityManagerFactoryRef = "verticaEntityManagerFactory",
        transactionManagerRef = "verticaTransactionManager",
        basePackages = { "com.yyy.vertica" }
)
public class MyDataSourceConfig extends HikariConfig {
    public final static String PERSISTENCE_UNIT_NAME = "vertica";
    public final static String PACKAGES_TO_SCAN = "com.xxx.entity";

    @Autowired
    private Environment env;

    @Bean
    public HikariDataSource verticaDataSource() {
        return new HikariDataSource(this);
    }

    @Bean
    public LocalContainerEntityManagerFactoryBean verticaEntityManagerFactory(
            final HikariDataSource verticaDataSource) {

        return new LocalContainerEntityManagerFactoryBean() {{
            setDataSource(verticaDataSource);
            setPersistenceProviderClass(HibernatePersistenceProvider.class);
            setPersistenceUnitName(PERSISTENCE_UNIT_NAME);
            setPackagesToScan(PACKAGES_TO_SCAN);

            Properties jpaProperties = new Properties();
            jpaProperties.put("hibernate.ddl-auto", env.getProperty("vertica.jpa.hibernate.ddl-auto"));
            jpaProperties.put("hibernate.show-sql", env.getProperty("vertica.jpa.hibernate.show-sql"));
            jpaProperties.put("hibernate.format_sql", env.getProperty("vertica.jpa.hibernate.format_sql"));
            jpaProperties.put("hibernate.dialect", env.getProperty("vertica.jpa.properties.hibernate.dialect"));

            setJpaProperties(jpaProperties);

            afterPropertiesSet();;
        }};
    }

    @Bean
    public PlatformTransactionManager verticaTransactionManager(EntityManagerFactory verticaEntityManagerFactory) {
        return new JpaTransactionManager(verticaEntityManagerFactory);
    }

上面yaml文件中定义的Hikari属性没有被考虑在内（可能是由于扩展了HikariConfig）。要求是使用默认的 Hikari 属性并覆盖上面定义的属性。请建议如何做到这一点。

Answer 1

不要扩展 HikariConfig。

使用HikariConfig（）的默认构造函数获取Hikari的默认配置属性，然后根据您的属性文件覆盖您需要的内容，就像您已经为jpa属性所做的那样。

@Bean
public HikariDataSource verticaDataSource() {
 HikariConfig hikariConfig = new HikariConfig();
        
hikariConfig.setConnectionTimeout(env.getProperty("vertica.datasource.hikari.connectionTimeout", Long.class)); 
  
hikariConfig.setIdleTimeout(env.getProperty("vertica.datasource.hikari.idleTimeout", Long.class)); 

hikariConfig.setMaxLifetime(env.getProperty("vertica.datasource.hikari.maxLifetime", Long.class)); 

hikariConfig.setKeepaliveTime(env.getProperty("vertica.datasource.hikari.keepaliveTime", Long.class));

hikariConfig.setMaximumPoolSize​(env.getProperty("vertica.datasource.hikari.maximumPoolSize", Integer.class));

hikariConfig.setMinimumIdle​(env.getProperty("vertica.datasource.hikari.minimumIdle", Integer.class));

return new HikariDataSource(hikariConfig);

}