java - 带有@Document的mongodb Multi-Tenancy 咒语

Question

这与 MongoDB and SpEL Expressions in @Document annotations

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
    }
}

还有我的域类

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

如您所见，我已经按照帖子中的说明创建了我的 mongotemplate，但我仍然收到以下错误

Exception in thread "main" org.springframework.expression.spel.SpelEvaluationException: EL1057E:(pos 1): No bean resolver registered in the context to resolve access to bean 'tenantProvider'

我做错了什么？

Answer 1

终于知道为什么会出现这个问题了。

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 Autowiring 以及mongoMappingContext.setApplicationContext(appContext);

通过这两行，我能够正确连接组件以在 Multi-Tenancy 模式下使用它