使用@Document的mongodb多租户游戏

Question

这与@Document批注中的MongoDB和SpEL表达式有关

这就是我创建mongo模板的方式

@Bean
public MongoDbFactory mongoDbFactory() throws UnknownHostException {
    String dbname = getCustid();
    return new SimpleMongoDbFactory(new MongoClient("localhost"), "mydb");
}

@Bean
MongoTemplate mongoTemplate() throws UnknownHostException {
    MappingMongoConverter converter = 
            new MappingMongoConverter(mongoDbFactory(), new MongoMappingContext());
    return new MongoTemplate(mongoDbFactory(), converter);
}

我有一个租户提供者类

@Component("tenantProvider")
public class TenantProvider {

    public String getTenantId() {
      --custome Thread local logic for getting a name
    }
}

还有我的域名课程

    @Document(collection = "#{@tenantProvider.getTenantId()}_device")
     public class Device {
    -- my fields here
    }

如您所见，我已经按照帖子中的指定创建了mongotemplate，但是仍然出现以下错误

线程“主”中的异常org.springframework.expression.spel.SpelEvaluationException：EL1057E
:(位置1）：没有在上下文中注册任何bean解析器来解析对bean’tenantProvider’的访问

我究竟做错了什么？

Answer 1

终于弄清楚了为什么我遇到这个问题。

使用Servlet 3初始化时，请确保将应用程序上下文添加到mongo上下文中，如下所示

    @Autowired
private ApplicationContext appContext;

public MongoDbFactory mongoDbFactory() throws UnknownHostException {
    return new SimpleMongoDbFactory(new MongoClient("localhost"), "apollo-mongodb");
}

@Bean
MongoTemplate mongoTemplate() throws UnknownHostException {
    final MongoDbFactory factory = mongoDbFactory();

    final MongoMappingContext mongoMappingContext = new MongoMappingContext();
    mongoMappingContext.setApplicationContext(appContext);

    // Learned from web, prevents Spring from including the _class attribute
    final MappingMongoConverter converter = new MappingMongoConverter(factory, mongoMappingContext);
    converter.setTypeMapper(new DefaultMongoTypeMapper(null));

    return new MongoTemplate(factory, converter);
}

检查上下文的自动装配以及 mongoMappingContext.setApplicationContext（appContext）;

通过这两行，我能够正确连接组件以在多租户模式下使用它