springboot配置两个MongoDB

由于项目需要访问不通的数据，需要配置两个MongoDB（也可以是多个）

添加依赖

        
            org.springframework.boot
            spring-boot-starter-data-mongodb
        

配置application.yml或application.properties

spring:  
  data:  
    mongodb:  
      primary:  
        uri: mongodb://user:password@localhost:27017/primarydb  
      secondary:  
        uri: mongodb://user:password@localhost:27018/secondarydb

java配置

启动类排除MongoDB自动配置

@SpringBootApplication(exclude = {MongoAutoConfiguration.class, MongoDataAutoConfiguration.class})
public class Application {

    public static void main(String[] args) {
        SpringApplication.run(Application.class, args);
    }

}

primary配置类

package XXX;

import com.mongodb.MongoClient;
import com.mongodb.MongoClientOptions;
import org.springframework.beans.factory.ObjectProvider;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.boot.autoconfigure.mongo.MongoClientFactory;
import org.springframework.boot.autoconfigure.mongo.MongoProperties;
import org.springframework.boot.context.properties.ConfigurationProperties;
import org.springframework.boot.context.properties.EnableConfigurationProperties;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.Primary;
import org.springframework.core.env.Environment;
import org.springframework.data.mongodb.core.MongoTemplate;
import org.springframework.data.mongodb.core.SimpleMongoDbFactory;
import org.springframework.data.mongodb.repository.config.EnableMongoRepositories;

//此处建议用package。之前用class，会绑定错误的MongoTemplate
@Configuration
@EnableMongoRepositories(basePackages = "com.xxx.dao.primary", mongoTemplateRef = "primaryMongoTemplate")
public class PrimaryMongodbConfig {

    @Autowired
    private ObjectProvider options;
    @Autowired
    private Environment environment;

    @Bean(name = "primaryPropertiess")
    @ConfigurationProperties(prefix = "spring.data.mongodb.primary")
    @Primary
    public MongoProperties primaryPropertiess() {
        return new MongoProperties();
    }

    @Bean(name = "primaryMongoClient")
    public MongoClient mongoClient(@Qualifier("primaryPropertiess") MongoProperties mongoProperties) {
        MongoClientFactory factory = new MongoClientFactory(mongoProperties, environment);
        return factory.createMongoClient(options.getIfAvailable());
    }

    @Bean(name = "primaryMongoDBFactory")
    public SimpleMongoDbFactory mongoDbFactory(
            @Qualifier("primaryMongoClient") MongoClient mongoClient,
            @Qualifier("primaryPropertiess") MongoProperties mongoProperties) {
        String database = mongoProperties.getMongoClientDatabase();
        return new SimpleMongoDbFactory(mongoClient, database);
    }

    @Bean(name = "primaryMongoTemplate")
    public MongoTemplate mongoTemplate(@Qualifier("primaryMongoDBFactory") SimpleMongoDbFactory mongoDatabaseFactory) {
        return new MongoTemplate(mongoDatabaseFactory);
    }
}

secondary配置类

package com.xxx.mongo;

import com.mongodb.MongoClient;
import com.mongodb.MongoClientOptions;
import org.springframework.beans.factory.ObjectProvider;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.boot.autoconfigure.mongo.MongoClientFactory;
import org.springframework.boot.autoconfigure.mongo.MongoProperties;
import org.springframework.boot.context.properties.ConfigurationProperties;
import org.springframework.boot.context.properties.EnableConfigurationProperties;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.core.env.Environment;
import org.springframework.data.mongodb.core.MongoTemplate;
import org.springframework.data.mongodb.core.SimpleMongoDbFactory;
import org.springframework.data.mongodb.repository.config.EnableMongoRepositories;


@Configuration
@EnableMongoRepositories(basePackages = "com.xxx.dao.secondary", mongoTemplateRef = "secondaryMongoTemplate")
public class SecondMongodbConfig {

    @Autowired
    private ObjectProvider options;
    @Autowired
    private Environment environment;

    @Bean(name = "secondaryProperties")
    @ConfigurationProperties(prefix = "spring.data.mongodb.secondary")
    public MongoProperties secondaryProperties() {
        return new MongoProperties();
    }

    @Bean(name = "secondaryMongoClient")
    public MongoClient mongoClient(@Qualifier("secondaryProperties") MongoProperties mongoProperties) {
        MongoClientFactory factory = new MongoClientFactory(mongoProperties, environment);
        return factory.createMongoClient(options.getIfAvailable());
    }

    @Bean(name = "secondaryMongoDBFactory")
    public SimpleMongoDbFactory mongoDbFactory(
            @Qualifier("secondaryMongoClient") MongoClient mongoClient,
            @Qualifier("secondaryProperties") MongoProperties mongoProperties) {
        String database = mongoProperties.getMongoClientDatabase();
        return new SimpleMongoDbFactory(mongoClient, database);
    }

    @Bean(name = "secondaryMongoTemplate")
    public MongoTemplate mongoTemplate(@Qualifier("secondaryMongoDBFactory") SimpleMongoDbFactory mongoDatabaseFactory) {
        return new MongoTemplate(mongoDatabaseFactory);
    }
}

OrderInfoPrimaryDao

package com.xxx.dao.primary;

import com.xxx.mongo.OrderInfoBase;
import org.springframework.data.domain.Pageable;
import org.springframework.data.domain.Sort;
import org.springframework.data.mongodb.repository.MongoRepository;
import org.springframework.data.mongodb.repository.Query;
import org.springframework.stereotype.Repository;

import java.util.List;

@Repository
public interface OrderInfoPrimaryDao extends MongoRepository {

    /**
     *
     * @param orderId
     * @return
     */
    List findByOrderId(Long orderId);

  

}

package com.xxx.dao.secondary;

import com.xxx.mongo.OrderInfoBase;
import org.springframework.data.domain.Pageable;
import org.springframework.data.domain.Sort;
import org.springframework.data.mongodb.repository.MongoRepository;
import org.springframework.data.mongodb.repository.Query;
import org.springframework.stereotype.Repository;

import java.util.List;

@Repository
public interface OrderInfoSecondaryDao extends MongoRepository {

    /**
     *
     * @param orderId
     * @return
     */
    List findByOrderId(Long orderId);

  

}

测试类

    @Autowired
    OrderInfoPrimaryDao orderInfoPrimaryDao;

    @Autowired
    OrderInfoSecondaryDao orderInfoSecondaryDao;

public BaseResponse test() {
       

            List byOrderId1 = orderInfoPrimaryDao.findByOrderId(7407731806818009176L);
            List byOrderId2 = orderInfoSecondaryDao.findByOrderId(7407731806818009176L);
    }

总结

本来是按basePackageClasses的方式实现的，结果两个MongoDB只有一个生效，怀疑是dao在一个包里面的原因，改成放在不同的包里面就正常了。

错误代码：@EnableMongoRepositories(basePackageClasses = orderInfoPrimaryDao.class, mongoTemplateRef = "primaryMongoTemplate")

有效代码：@EnableMongoRepositories(basePackages = "com.xxx.dao.secondary", mongoTemplateRef = "secondaryMongoTemplate")