mongodb实现多数据源 & 集成高版本mongodb3.11.2

MongoDB Java基本操作
https://www.cnblogs.com/RealWorld/p/9209687.html

springboot2与mongodb整合
https://blog.csdn.net/p_programmer/article/details/89289067?utm_medium=distribute.pc_relevant.none-task-blog-baidujs-7

springboot集成高版本mongodb3.11.2
https://blog.csdn.net/xjmfc/article/details/106929136?utm_medium=distribute.pc_relevant.none-task-blog-baidujs-1

SpringBoot 2.2.0 SpringData MongoDB使用示例(一)
https://blog.csdn.net/pingpei1133/article/details/103104426?utm_medium=distribute.pc_relevant.none-task-blog-BlogCommendFromMachineLearnPai2-16.compare&depth_1-
utm_source=distribute.pc_relevant.none-task-blog-BlogCommendFromMachineLearnPai2-16.compare

mongodb实现多数据源
https://www.cnblogs.com/mczhou2/p/12713042.html

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mongodb实现多数据源

 

       最近在开发过程中遇到一个需求，想要实现该需求需要把一个mongodb库里面的表&数据复制到另一个mongodb库。首先需要做的一件事就是配置多数据源，由于项目采用SpringBoot，所以配置多数据源也是在这个框架基础上的。话不多说，直接上代码

首先pom.xml需要引入如下配置

1 <dependency>
2    <groupId>org.springframework.boot</groupId>
3    <artifactId>spring-boot-configuration-processor</artifactId>
4    <optional>true</optional>
5 </dependency>
6 <dependency>
7    <groupId>org.springframework.boot</groupId>
8    <artifactId>spring-boot-starter-data-mongodb</artifactId>
9 </dependency>

分别定义三个类AbstractMongoConfig、PrimaryMongoConfig、SecondMongoConfig

 1 import com.mongodb.MongoClientURI;
 2 import org.springframework.data.mongodb.MongoDbFactory;
 3 import org.springframework.data.mongodb.core.MongoTemplate;
 4 import org.springframework.data.mongodb.core.SimpleMongoDbFactory;
 5 
 6 /**
 7  * 描述
 8  *
 9  * @author mczhou2 2020/3/2010:50
10  */
11 public abstract  class AbstractMongoConfig {
12     //连接MongoDB地址
13     private String uri;
14     /**
15      * 获取mongoDBTemplate对象
16      */
17     public abstract MongoTemplate getMongoTemplate() throws Exception;
18     /**
19      * 创建mongoDb工厂
20      */
21     public MongoDbFactory mongoDbFactory() throws Exception {
22         MongoClientURI mongoclienturi = new MongoClientURI(uri);
23         return new SimpleMongoDbFactory(mongoclienturi);
24     }
25     public String getUri() {
26         return uri;
27     }
28 
29     public void setUri(String uri) {
30         this.uri = uri;
31     }
32 }

import org.springframework.boot.context.properties.ConfigurationProperties;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.Primary;
import org.springframework.data.mongodb.core.MongoTemplate;

/**
 * 描述
 *
 * @author mczhou2 2020/3/20 10:51
 */
@Configuration
@ConfigurationProperties(prefix = "spring.data.mongodb.primary")
public class PrimaryMongoConfig extends AbstractMongoConfig{
    @Override
    @Primary
    @Bean(name = "primaryMongoTemplate")
    public MongoTemplate getMongoTemplate() throws Exception {
        return new MongoTemplate((mongoDbFactory()));
    }
}

 1 import org.springframework.boot.context.properties.ConfigurationProperties;
 2 import org.springframework.context.annotation.Bean;
 3 import org.springframework.context.annotation.Configuration;
 4 import org.springframework.context.annotation.Primary;
 5 import org.springframework.data.mongodb.core.MongoTemplate;
 6 
 7 /**
 8  * 描述
 9  *
10  * @author mczhou2 2020/3/2010:51
11  */
12 @Configuration
13 @ConfigurationProperties(prefix = "spring.data.mongodb.second")
14 public class SecondaryMongoConfig extends AbstractMongoConfig{
15 
16     @Override
17     @Primary
18     @Bean(name = "secondMongoTemplate")
19     public MongoTemplate getMongoTemplate() throws Exception {
20         return new MongoTemplate((mongoDbFactory()));
21     }
22 }

接下来启动类的注解需要屏蔽之前的类，否在项目启动报错

 1 import org.springframework.boot.SpringApplication;
 2 import org.springframework.boot.autoconfigure.SpringBootApplication;
 3 import org.springframework.boot.autoconfigure.data.mongo.MongoDataAutoConfiguration;
 4 import org.springframework.boot.autoconfigure.mongo.MongoAutoConfiguration;
 5 
 6 @SpringBootApplication(exclude = {MongoAutoConfiguration.class, MongoDataAutoConfiguration.class})
 7 public class DemoApplication {
 8     public static void main(String[] args) {
 9         SpringApplication.run(DemoApplication.class,args);
10     }
11 }

至此，mongodb多数据源就配置好了。这时候大家也许会问，前期准备工作好了，到底怎么用？你确定你想知道，那下回来我手把手教你。