使用@Document进行mongodb多语言拼写

Question

这与@Document注释中的MongoDB和SpEL表达式有关

这是我创建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
    }
}

和我的域名课程

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

如你所见,我已经按照帖子中的说明创建了我的mongotemplate,但我仍然得到以下错误

线程"main"中的异常org.springframework.expression.spel.SpelEvaluationException:EL1057E:(pos 1):在上下文中没有注册bean解析器来解析对bean'tenantProvider'的访问

我究竟做错了什么？

Answer 1

终于弄明白我为什么会遇到这个问题.

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);

通过这两条线,我能够正确连接组件,以便在多租户模式下使用它