Actually i’m pretty confused about this terms and how they relate to each other. A read something about every one of them but i don’t uderstant the work flow..
DTO – Data transfer object – object to transport values
BO Business object – object in domain model. object to make Business logic with
POCO – no idea, i’ve read a definition on wiki but didn’t understood anything
DAO – data access object – object to map the DB table ?
Could someone please bring some light into it for me ?
Separation of concerns – DAO, DTO, and BO
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POCO = Plain Old CLR (or better: Class) Object DTO = Data Transfer Object In this post there is a difference, but frankly most of the blogs I read describe POCO in the way DTO is defined: DTOs are sim
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- DTO: Data Transfer Object, used to transfer data between loosly coupled services
- POCO: Plain Old Clr Object, normal CLR object doesn’t use any attributes or required inheritance to act as a DAO/DTO
- BO: Business Object, contains business logic, used in the Business Logic part of your solution
- DAO: Data Access Object, used to transfer data from your database
So a regular workflow would be to request data from a service, which is sent to your app as a DTO, you convert it to a BO to manipulate it and send it back as a DTO or after converting it to a DAO store it in a database.
You use the different object to separate concerns between the 3 types, a BO doesn’t need to know whether it’s persisted using a database or a service.
Timeline based scaffolding:
Batch => Stored Procedure => “plain old clr object” => npmagenda
Socket => ODBC => “data access object” => NoSQL
CSV => XML => “data transfer object” => JSON
FTP => CGI => “business object” => AJAX