如何在Spring Boot中结合两个数据源和Flyway使用HikariCP [英] How to use HikariCP in Spring Boot with two datasources in conjunction with Flyway

问题描述

我想在Spring引导应用程序中将HikariCP用作JDBC连接池.我有两个数据源(MySQL数据库作为主要数据库，并通过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).

I want to use HikariCP as JDBC connection pool in my Spring boot application. I have two datasources (MySQL database as the primary database and accessing those data through Hibernate and additionally an Oracle database for reading some other data through JDBCTemplate).

我将MySQL数据源设置为主豆:

I set the MySQL datasource as primary 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);
 }

，然后将以下配置放在我的application.properties中:

and I put the following configurations in my application.properties :

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

不幸的是，这些HikariCP配置没有被读取:

Unforuntately, these HikariCP configurations are not being read :

 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":

Creating the HikariCP beans and deactivating the DataSource autoconfiguration and removing "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"

但是随后Flyway显示了一些之前未显示的奇怪警告，因此我必须在运行Spring应用程序之前手动创建数据库模式，即:创建模式不再起作用.

But then the Flyway showing some weird warnings which were not shown before and I have to create the database Schema manually before running the Spring application, that is : the create schema does not work anymore.

[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) 

我的Flyway SQL脚本是普通的DDL脚本:

My Flyway SQL scripts are plain DDL scripts :

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.还有其他解决方法吗?

I think that disabling the Auto-Datasource configuration is not the best solution since Flyway stops creating the schema and showing warnings. Is there any other way to solve this ?

推荐答案

声明自己的DataSource将已经隐式禁用Spring Boot的数据源自动配置.换句话说，这不会起作用:

Declaring your own DataSource will already have implicity disabled Spring Boot's auto-configuration of a data source. In other words this won't be having any effect:

@EnableAutoConfiguration(exclude = {DataSourceAutoConfiguration.class})

我认为问题在于您没有将Hikari特定的配置绑定到MySQL DataSource.您需要执行以下操作:

I think the problem lies in the fact that you aren't binding Hikari-specific configuration to your MySQL DataSource. You need to do something like this:

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

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

This will mean that your mySQLDataSourceProperties are configured with general-purpose data source configuration. They then create a HikariDataSource which is further configured with the Hikari-specific configuration.

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