springboot 2 Hikari 多数据源配置问题(dataSourceClassName or jdbcUrl is required)

springboot 2 Hikari 多数据源配置问题(dataSourceClassName or jdbcUrl is required)

最近在项目中想试一下使用 Hikari 连接池,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,现在换成 Spring Boot 之后,总遇到一些奇怪的问题,问题的根源是在于自己是个半桶水。

好了,先来看看 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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数据源配置文件:

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;

/**

  • 数据源配置

  • @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);
    

    }
    }
    复制代码

报错信息:

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决方法:

  1. url 换成了 jdbc-url;
  2. 增加 driver-class-name: com.mysql.cj.jdbc.Driver

试了一下,果然真的可以。但是,没有使用多数据源时,原来的配置文件也是能正常使用的啊,为什么呢?

问题肯定是出在增加了 DataSourceConfig 这个配置文件之后。

于是试着把配置文件还原回去,再把

return DataSourceBuilder.create().build();
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改为如下:

      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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也就是从配置文件拿到配置值之后重新赋值一下,再次启动项目,居然好了~

原因就是出在 DataSourceBuilder 创建数据源这个类上,而单数据源自动装载时不会出现这样的问题。

原文地址;https://juejin.im/post/5cb2f9f26fb9a068b748ab33
posted @ 2019-08-06 16:32  星朝  阅读(20612)  评论(0编辑  收藏  举报