多数据源MongoDB的使用(法二：lombok+MongoDbFactory+MongoProperties+注解).md

pom包的设置：添加lombok和spring-boot-autoconfigure包引用

<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-data-mongodb</artifactId>
</dependency>
<dependency>
    <groupId>org.projectlombok</groupId>
    <artifactId>lombok</artifactId>
</dependency>
<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-autoconfigure</artifactId>
    <version>RELEASE</version>
</dependency>

配置文件使用YAML的形式添加两条数据源，如下：

mongodb:
  primary:
    host: 192.168.9.60
    port: 20000
    database: test
  secondary:
    host: 192.168.9.60
    port: 20000
    database: test1

本mongodb环境没有设置权限认证。

配置两个库的数据源(包括MongoDbFactory和MongoTemplate的配置)

加载数据源配置对象MultipleMongoProperties

@Data
@ConfigurationProperties(prefix = "mongodb")
public class MultipleMongoProperties {

    private MongoProperties primary = new MongoProperties();
    private MongoProperties secondary = new MongoProperties();
}

配置不同包路径下使用不同的数据源

第一个库的封装

@Configuration
@EnableMongoRepositories(basePackages = "com.neo.model.repository.primary",
        mongoTemplateRef = PrimaryMongoConfig.MONGO_TEMPLATE)
public class PrimaryMongoConfig {

    protected static final String MONGO_TEMPLATE = "primaryMongoTemplate";
}

第二个库的封装

@Configuration
@EnableMongoRepositories(basePackages = "com.neo.model.repository.secondary",
        mongoTemplateRef = SecondaryMongoConfig.MONGO_TEMPLATE)
public class SecondaryMongoConfig {

    protected static final String MONGO_TEMPLATE = "secondaryMongoTemplate";
}

读取对应的配置信息并且构造对应的MongoTemplate(创建各数据源的MongoTemplate)

/**
 * 获取各数据源MongoTemplate
 *
 */
@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 {
        return new SimpleMongoDbFactory(new MongoClient(mongo.getHost(), mongo.getPort()),
                mongo.getDatabase());
    }

    @Bean
    public MongoDbFactory secondaryFactory(MongoProperties mongo) throws Exception {
        return new SimpleMongoDbFactory(new MongoClient(mongo.getHost(), mongo.getPort()),
                mongo.getDatabase());
    }
}

本实例mongodb环境没有设置权限认证的,可以简单的通过newSimpleMongoDbFactory(newMongoClient(host, port), database)实现对MongoDbFactory的创建。

创建两个库分别对应的对象和Repository

借助lombok来构建对象

@Data
@AllArgsConstructor
@NoArgsConstructor
@Document(collection = "first_mongo")
public class PrimaryMongoObject {

    @Id
    private String id;

    private String value;

    @Override
    public String toString() {
        return "PrimaryMongoObject{" + "id='" + id + '\'' + ", value='" + value + '\''
                + '}';
    }
}

对应的Repository

public interface PrimaryRepository extends MongoRepository<PrimaryMongoObject, String> {
}

public interface SecondaryRepository extends MongoRepository<SecondaryMongoObject, String> {
}

继承了 MongoRepository会默认实现很多基本的增删改查，省了很多自己写dao层的代码。

实现service层的开发

多数据源MongoDB的使用(法二：lombok+MongoDbFactory+MongoProperties+注解).md

猜你喜欢