springboot系列15：多数据源MongoDB

 上一篇介绍了mongodb单数据源的使用，这次我们聊聊多数据源的使用。

多数据源 MongoDB 的使用

 

1、pom 配置

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<dependencies>     <dependency>         <groupId>org.springframework.boot</groupId>         <artifactId>spring-boot-starter-data-mongodb</artifactId>     </dependency>     <dependency>         <groupId>org.springframework.boot</groupId>         <artifactId>spring-boot-starter-test</artifactId>     </dependency>     <dependency>         <groupId>org.springframework.boot</groupId>         <artifactId>spring-boot-starter-web</artifactId>     </dependency> </dependencies>

 

2、 配置两条数据源

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mongodb.primary.uri=mongodb://localhost:28018 mongodb.primary.database=primary mongodb.secondary.uri=mongodb://localhost:28018 mongodb.secondary.database=secondary

 

3、 配置映射类

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package top.zlcxy.multimongodb.properties;   import org.springframework.boot.autoconfigure.mongo.MongoProperties; import org.springframework.boot.context.properties.ConfigurationProperties;   @ConfigurationProperties(prefix = "mongodb") public class MultipleMongoProperties {       private MongoProperties primary = new MongoProperties();     private MongoProperties secondary = new MongoProperties();       public MongoProperties getPrimary() {         return primary;     }       public void setPrimary(MongoProperties primary) {         this.primary = primary;     }       public MongoProperties getSecondary() {         return secondary;     }       public void setSecondary(MongoProperties secondary) {         this.secondary = secondary;     } }

 

4、 对第一个库封装

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@Configuration @EnableConfigurationProperties(MultipleMongoProperties.class) @EnableMongoRepositories(basePackages = "top.zlcxy.multimongodb.repository.primary",         mongoTemplateRef = PrimaryMongoConfig.MONGO_TEMPLATE) public class PrimaryMongoConfig {       protected static final String MONGO_TEMPLATE = "primaryMongoTemplate"; }

 

5、 对第二个库封装

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@Configuration @EnableConfigurationProperties(MultipleMongoProperties.class) @EnableMongoRepositories(basePackages = "top.zlcxy.multimongodb.repository.secondary",         mongoTemplateRef = SecondaryMongoConfig.MONGO_TEMPLATE) public class SecondaryMongoConfig {       protected static final String MONGO_TEMPLATE = "secondaryMongoTemplate"; }

 

6、 读取对应的配置信息并且构造对应的 MongoTemplate

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@Configuration public class MultipleMongoConfig {       @Autowired     private MultipleMongoProperties mongoProperties;       @Primary     @Bean(name = PrimaryMongoConfig.MONGO_TEMPLATE)     public MongoTemplate primaryMongoTemplate() throws Exception {         return new MongoTemplate(primaryFactory(this.mongoProperties.getPrimary()));     }       @Bean     @Qualifier(SecondaryMongoConfig.MONGO_TEMPLATE)     public MongoTemplate secondaryMongoTemplate() throws Exception {         return new MongoTemplate(secondaryFactory(this.mongoProperties.getSecondary()));     }       @Bean     @Primary     public MongoDbFactory primaryFactory(MongoProperties mongo) throws Exception {         MongoClient client = new MongoClient(new MongoClientURI(mongoProperties.getPrimary().getUri()));         return new SimpleMongoDbFactory(client, mongoProperties.getPrimary().getDatabase());     }       @Bean     public MongoDbFactory secondaryFactory(MongoProperties mongo) throws Exception {         MongoClient client = new MongoClient(new MongoClientURI(mongoProperties.getSecondary().getUri()));         return new SimpleMongoDbFactory(client, mongoProperties.getSecondary().getDatabase());     } }

 

6、 测试编写

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@RunWith(SpringRunner.class) @SpringBootTest public class MuliMongodbTest {       @Autowired     private UserPrimaryRepository userPrimaryRepository;       @Autowired     private UserSecondaryRepository userSecondaryRepository;       @Test     public void testUser() {         userPrimaryRepository.save(new User(1L,"张三", "123456"));         List<User> primaryUsers = userPrimaryRepository.findAll();         for (User user : primaryUsers) {             System.out.println(user);         }           userSecondaryRepository.save(new User(2L,"李四", "123456"));         List<User> secondaryUsers = userSecondaryRepository.findAll();         for (User user : secondaryUsers) {             System.out.println(user);         }       }   }

 

7、 测试结果

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2020-06-14 18:11:18.614  INFO 7120 --- [           main] org.mongodb.driver.connection            : Opened connection [connectionId{localValue:3, serverValue:14}] to localhost:28018 User{id=1, userName='张三', passWord='123456'} 2020-06-14 18:11:19.019  INFO 7120 --- [           main] org.mongodb.driver.connection            : Opened connection [connectionId{localValue:4, serverValue:15}] to localhost:28018 User{id=2, userName='李四', passWord='123456'}