Dubbo：配置多数据源

第一步：

package com.huayong.bi.web.dao;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.boot.autoconfigure.domain.EntityScan;
import org.springframework.boot.autoconfigure.jdbc.DataSourceProperties;
import org.springframework.boot.autoconfigure.orm.jpa.HibernateSettings;
import org.springframework.boot.autoconfigure.orm.jpa.JpaProperties;
import org.springframework.boot.context.properties.ConfigurationProperties;
import org.springframework.boot.orm.jpa.EntityManagerFactoryBuilder;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.Primary;
import org.springframework.data.jpa.repository.config.EnableJpaRepositories;
import org.springframework.orm.jpa.JpaTransactionManager;
import org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean;
import org.springframework.transaction.PlatformTransactionManager;
import org.springframework.transaction.annotation.EnableTransactionManagement;

import javax.persistence.EntityManager;
import javax.sql.DataSource;
import java.util.Map;

@Configuration
@EnableTransactionManagement
@EnableJpaRepositories(
        entityManagerFactoryRef = "entityManagerFactoryPrimary",
        transactionManagerRef = "transactionManagerPrimary",
        basePackages = {"com.huayong.bi.dao.pfbi.repository"})          //指定dao路径，数据库操作
public class PrimaryDBConf {

    /**
     * 构建主数据源
     *
     * @return
     */
    @Bean
    @Primary
    @Qualifier("primaryDataSource")
    @ConfigurationProperties(prefix = "spring.datasource.primary")             //选择主数据源
    public DataSourceProperties primaryDataSourceProperties() {
        return new DataSourceProperties();
    }

    @Bean
    @Primary
    @Qualifier("primaryDataSource")
    @ConfigurationProperties(prefix = "spring.datasource.primary")            //选择主数据源
    public DataSource primaryDataSource() {
        return primaryDataSourceProperties().initializeDataSourceBuilder().build();
    }

    @Autowired
    @Qualifier("primaryDataSource")
    private DataSource primaryDataSource;

    @Autowired
    private JpaProperties jpaProperties;

    /**
     * HibernateSettings为配置列名生成策略，在yml中已经配置
     * spring boot1.5.* 中此方法有区别。返回的是DataSource，详见spring-boot-examples下的spring-boot-multi-datasource示例
     *
     * @return
     */
    public Map<String, Object> getVerdorProperties() {
        return jpaProperties.getHibernateProperties(new HibernateSettings());
    }

    /**
     * entity管理工厂，指定entity位置
     *
     * @param builder
     * @return
     */
    @Primary
    @Bean
    public LocalContainerEntityManagerFactoryBean entityManagerFactoryPrimary(EntityManagerFactoryBuilder builder) {
        return builder
                .dataSource(primaryDataSource)
                .packages("com.huayong.bi.dao.pfbi.entity")          //指定entity路径，字段映射
                .properties(getVerdorProperties())
                .persistenceUnit("primaryPersistenceUnit")
                .build();
    }

    @Bean
    @Primary
    public EntityManager entityManagerPrimary(EntityManagerFactoryBuilder builder) {
        return entityManagerFactoryPrimary(builder).getObject().createEntityManager();
    }

    @Primary
    @Bean
    public PlatformTransactionManager transactionManagerPrimary(EntityManagerFactoryBuilder builder) {
        return new JpaTransactionManager(entityManagerFactoryPrimary(builder).getObject());
    }
}

第二步：

这里注意加上primary