springboot 2 Hikari 多數據源配置問題(dataSourceClassName or jdbcUrl is required)
最近在項目中想試一下使用 Hikari 連接池,以前用的是阿里的 Druid,框架是 Spring MVC,xml配置文件方式注入的 Bean,現在換成 Spring Boot 之后,總遇到一些奇怪的問題,問題的根源是在於自己是個半桶水。
好了,先來看看 application.yml 配置文件:
spring:
jpa:
show-sql: true
datasource:
url: jdbc:mysql://localhost:3306/test?characterEncoding=utf8&useSSL=true
username: root
password: root
type: com.zaxxer.hikari.HikariDataSource
hikari:
maximum-pool-size: 20
max-lifetime: 30000
idle-timeout: 30000
data-source-properties:
prepStmtCacheSize: 250
prepStmtCacheSqlLimit: 2048
cachePrepStmts: true
useServerPrepStmts: true
slave:
url: jdbc:mysql://localhost:3306/test?characterEncoding=utf8&useSSL=true
username: root
password: root
type: com.zaxxer.hikari.HikariDataSource
hikari:
maximum-pool-size: 20
max-lifetime: 30000
idle-timeout: 30000
data-source-properties:
prepStmtCacheSize: 250
prepStmtCacheSqlLimit: 2048
cachePrepStmts: true
useServerPrepStmts: true
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數據源配置文件:
package org.seckill.config;
import com.zaxxer.hikari.HikariDataSource;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.boot.autoconfigure.jdbc.DataSourceProperties;
import org.springframework.boot.context.properties.ConfigurationProperties;
import org.springframework.boot.jdbc.DataSourceBuilder;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.Primary;
import org.springframework.jdbc.core.JdbcTemplate;
import javax.sql.DataSource;
import java.util.HashMap;
import java.util.Map;
/**
-
數據源配置
-
@author jeftom
-
@date 2019-04-14 12:03
-
@since 1.0.0
*/
@Configuration
public class DataSourceConfig {
private final static Logger LOGGER = LoggerFactory.getLogger(DataSourceConfig.class);@Bean(name = "masterDataSource")
@ConfigurationProperties(prefix = "spring.datasource")
public DataSource masterDataSource(DataSourceProperties properties) {
LOGGER.info("init master data source:{}", properties);
return DataSourceBuilder.create().build();
}@Bean(name = "slaveDataSource")
@ConfigurationProperties(prefix = "spring.datasource.slave")
public DataSource slaveDataSource(DataSourceProperties properties) {
LOGGER.info("init slave data source:{}", properties);
return DataSourceBuilder.create().build();
}@Bean
@Primary
public DynamicDataSource dataSource(DataSource masterDataSource, DataSource slaveDataSource) {
Map<String, DataSource> targetDataSources = new HashMap<>();
targetDataSources.put(DataSourceEnum.MASTER.getName(), masterDataSource);
targetDataSources.put(DataSourceEnum.SLAVE.getName(), slaveDataSource);<span class="hljs-built_in"><span class="hljs-built_in">return</span></span> new DynamicDataSource(masterDataSource, targetDataSources);
}
}
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報錯信息:
com.zaxxer.hikari.HikariConfig : HikariPool-1 - dataSource or dataSourceClassName or jdbcUrl is required.
java.lang.IllegalArgumentException: dataSource or dataSourceClassName or jdbcUrl is required.
at com.zaxxer.hikari.HikariConfig.validate(HikariConfig.java:955) ~[HikariCP-3.2.0.jar:na]
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百度了一下找到的解決方法:
- url 換成了 jdbc-url;
- 增加 driver-class-name: com.mysql.cj.jdbc.Driver
試了一下,果然真的可以。但是,沒有使用多數據源時,原來的配置文件也是能正常使用的啊,為什么呢?
問題肯定是出在增加了 DataSourceConfig 這個配置文件之后。
於是試着把配置文件還原回去,再把
return DataSourceBuilder.create().build();
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改為如下:
return DataSourceBuilder.create(properties.getClassLoader())
.type(HikariDataSource.class)
.driverClassName(properties.determineDriverClassName())
.url(properties.determineUrl())
.username(properties.determineUsername())
.password(properties.determinePassword())
.build();
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也就是從配置文件拿到配置值之后重新賦值一下,再次啟動項目,居然好了~
原因就是出在 DataSourceBuilder 創建數據源這個類上,而單數據源自動裝載時不會出現這樣的問題。