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springboot-mongodb的多數(shù)據(jù)源配置的方法步驟

更新時間：2019年04月25日 11:17:08 作者：bronk

這篇文章主要介紹了springboot-mongodb的多數(shù)據(jù)源配置的方法步驟，文中通過示例代碼介紹的非常詳細，對大家的學(xué)習(xí)或者工作具有一定的參考學(xué)習(xí)價值，需要的朋友們下面隨著小編來一起學(xué)習(xí)學(xué)習(xí)吧

在日常工作中，我們可能需要連接多個MongoDB數(shù)據(jù)源，比如用戶庫user，日志庫log。本章我們來記錄連接多個數(shù)據(jù)源的步驟，以兩個數(shù)據(jù)源為例，多個數(shù)據(jù)源類推。

1、pom.xml中引入mongodb的依賴

<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>

Lombok - 是一個可以通過簡單的注解形式來幫助我們簡化消除一些必須有但顯得很臃腫的Java代碼的工具，通過使用對應(yīng)的注解，可以在編譯源碼的時候生成對應(yīng)的方法。簡單試了以下這個工具還挺好玩的，加上注解我們就不用手動寫 getter\setter、構(gòu)建方式類似的代碼了。

2, yml配置:

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

3, 配置2個庫的數(shù)據(jù)源:

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

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

3.1) 第一個庫封裝:

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

  protected static final String MONGO_TEMPLATE = "primaryMongoTemplate";
}

3.2) 第二個庫封裝 :

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

  protected static final String MONGO_TEMPLATE = "secondaryMongoTemplate";
}

3.3) 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());
  }
}

4, 創(chuàng)建2個庫對應(yīng)的repository:

@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 + '\''
        + '}';
  }
}

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

測試:

@RunWith(SpringRunner.class)
@SpringBootTest
public class MuliDatabaseTest {

  @Autowired
  private PrimaryRepository primaryRepository;

  @Autowired
  private SecondaryRepository secondaryRepository;

  @Test
  public void TestSave() {

    System.out.println("************************************************************");
    System.out.println("測試開始");
    System.out.println("************************************************************");

    this.primaryRepository
        .save(new PrimaryMongoObject(null, "第一個庫的對象"));

    this.secondaryRepository
        .save(new SecondaryMongoObject(null, "第二個庫的對象"));

    List<PrimaryMongoObject> primaries = this.primaryRepository.findAll();
    for (PrimaryMongoObject primary : primaries) {
      System.out.println(primary.toString());
    }

    List<SecondaryMongoObject> secondaries = this.secondaryRepository.findAll();

    for (SecondaryMongoObject secondary : secondaries) {
      System.out.println(secondary.toString());
    }

    System.out.println("************************************************************");
    System.out.println("測試完成");
    System.out.println("************************************************************");
  }

}

以上就是本文的全部內(nèi)容，希望對大家的學(xué)習(xí)有所幫助，也希望大家多多支持腳本之家。

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