Question

我想在我的Spring启动应用程序中使用HikariCP作为JDBC连接池。我有两个数据源（MySQL数据库作为主数据库，通过Hibernate访问这些数据，另外还有一个Oracle数据库，用于通过JDBCTemplate读取其他数据）。

我将MySQL数据源设置为主bean：

@Bean
@Primary
@ConfigurationProperties("spring.datasource")
public DataSourceProperties mySQLDataSourceProperties() {
    return new DataSourceProperties();
}


@Bean
@Primary
@ConfigurationProperties("spring.datasource")
public DataSource mySQLDataSource() {
    return mySQLDataSourceProperties().initializeDataSourceBuilder().build();
}

@Bean
@ConfigurationProperties("oracle.datasource")
public DataSourceProperties oracleDataSourceProperties() {
    return new DataSourceProperties();
}

@Bean(name = "oracleDatabase")
@ConfigurationProperties("oracle.datasource")
public DataSource oracleDataSource() {
    return oracleDataSourceProperties().initializeDataSourceBuilder().build();
}

 @Bean
 public JdbcTemplate oracleJdbcTemplate(@Qualifier("oracleDatabase") DataSource oracleDb) {
     return new JdbcTemplate(oracleDb);
 }

我将以下配置放在application.properties中：

spring.datasource.type=com.zaxxer.hikari.HikariDataSource

spring.datasource.hikari.minimum-idle=7
spring.datasource.hikari.pool-name=Test-1

spring.datasource.hikari.data-source-properties.prepStmtCacheSize=250
spring.datasource.hikari.data-source-properties.prepStmtCacheSqlLimit=2048
spring.datasource.hikari.data-source-properties.cachePrepStmts=true
spring.datasource.hikari.data-source-properties.useServerPrepStmts=true

不可思议的是，这些HikariCP配置未被阅读：

 HikariConfig - dataSourceJNDI..................none
 HikariConfig - dataSourceProperties............{password=<masked>}
 HikariConfig - driverClassName................."com.mysql.jdbc.Driver"
 HikariConfig - healthCheckProperties...........{}
 HikariConfig - healthCheckRegistry.............none
 HikariConfig - idleTimeout.....................600000
 HikariConfig - initializationFailFast..........true
 HikariConfig - initializationFailTimeout.......1
 HikariConfig - isolateInternalQueries..........false
 HikariConfig - jdbc4ConnectionTest.............false
 HikariConfig - jdbcUrl........................."jdbc:mysql://localhost:3306/testDB"
 HikariConfig - leakDetectionThreshold..........0
 HikariConfig - maxLifetime.....................1800000
 HikariConfig - maximumPoolSize.................10
 HikariConfig - metricRegistry..................none
 HikariConfig - metricsTrackerFactory...........none
 HikariConfig - minimumIdle.....................10
 HikariConfig - password........................<masked>
 HikariConfig - poolName........................"HikariPool-1"

创建HikariCP bean并停用DataSource自动配置并删除“spring.datasource”：

@EnableAutoConfiguration(exclude = {DataSourceAutoConfiguration.class})
@SpringBootApplication
@ComponentScan
public class SpringApplication {


@Bean
@Primary
@ConfigurationProperties(prefix = "spring.datasource.hikari")
public HikariConfig hikariConfig() {
    return new HikariConfig();
}

@Bean
public DataSource dataSource() {
    return new HikariDataSource(hikariConfig());
}

解决了我的问题：

 HikariConfig - dataSourceJNDI..................none
 HikariConfig - dataSourceProperties............{password=<masked>, prepStmtCacheSqlLimit=2048, cachePrepStmts=true, useServerPrepStmts=true, prepStmtCacheSize=250}
 HikariConfig - driverClassName................."com.mysql.jdbc.Driver"
 HikariConfig - healthCheckProperties...........{}
 HikariConfig - healthCheckRegistry.............none
 HikariConfig - idleTimeout.....................600000
 HikariConfig - initializationFailFast..........true
 HikariConfig - initializationFailTimeout.......1
 HikariConfig - isolateInternalQueries..........false
 HikariConfig - jdbc4ConnectionTest.............false
 HikariConfig - jdbcUrl........................."jdbc:mysql://localhost:3306/testDB?autoReconnect=true"
 HikariConfig - leakDetectionThreshold..........0
 HikariConfig - maxLifetime.....................1800000
 HikariConfig - poolName........................"Test-1"

然后，Flyway显示了一些之前未显示的奇怪警告，我必须在运行Spring应用程序之前手动创建数据库Schema，即：create schema不再起作用。

[WARN ] JdbcTemplate - DB: Can't create database 'test'; database exists (SQL State: HY000 - Error Code: 1007)
[WARN ] JdbcTemplate - DB: Unknown table 'testSchema.tenant' (SQL State: 42S02 - Error Code: 1051)
[WARN ] JdbcTemplate - DB: Unknown table 'testSchema.user' (SQL State: 42S02 - Error Code: 1051)

My Flyway SQL脚本是普通的DDL脚本：

CREATE SCHEMA IF NOT EXISTS `testSchema` DEFAULT CHARACTER SET utf8 ;

DROP TABLE IF EXISTS `testSchema`.`tenant`;

CREATE TABLE `testSchema`.`tenant` (
  `id` int NOT NULL AUTO_INCREMENT,

我认为禁用自动数据源配置并不是最佳解决方案，因为Flyway会停止创建架构并显示警告。还有其他方法可以解决这个问题吗？

Answer 1

声明自己的DataSource已经禁止Spring Boot自动配置数据源。换句话说，这不会产生任何影响：

@EnableAutoConfiguration(exclude = {DataSourceAutoConfiguration.class})

我认为问题在于你没有将Hikari特定的配置绑定到MySQL DataSource。你需要做这样的事情：

@Bean
@Primary
@ConfigurationProperties("spring.datasource.hikari")
public DataSource mySQLDataSource() {
    return mySQLDataSourceProperties().initializeDataSourceBuilder().build();
}

这意味着您的mySQLDataSourceProperties配置了通用数据源配置。然后，他们创建一个HikariDataSource，进一步使用Hikari特定配置进行配置。

Answer 2

感谢Andy的快速而有价值的回答！你让我走上正轨。摆弄后，我发现这个配置对我有用：

    @Bean
    @Primary
    @ConfigurationProperties("spring.datasource") 
  //@ConfigurationProperties("spring.datasource.hikari") can also be used, no difference
    public DataSourceProperties mySQLDataSourceProperties() {
        return new DataSourceProperties();
    }

    @Bean
    @Primary
    @ConfigurationProperties("spring.datasource.hikari")
    public DataSource mySQLDataSource() {
        return mySQLDataSourceProperties().initializeDataSourceBuilder().build();
    }

    @Bean
    @ConfigurationProperties(prefix = "spring.datasource.hikari")
    public HikariConfig hikariConfig() {
        return new HikariConfig();
    }

    @Bean
    public DataSource dataSource() {
        return new HikariDataSource(hikariConfig());
    }

我必须在application.properties中添加这些设置：

# this is absolutely mandatory otherwise BeanInstantiationException in mySQLDataSource ! 
spring.datasource.url=${JDBC_CONNECTION_STRING}

spring.datasource.hikari.jdbc-url=${JDBC_CONNECTION_STRING}

spring.datasource.hikari.username=user
spring.datasource.hikari.password=pass

如何在Spring Boot中使用HikariCP，将两个数据源与Flyway结合使用

2 个答案: