Re: MVP : model and duplicate
I think you should avoid duplicate the model objects. Find the way to share them between all you application or cut off one layer :P 2010/7/7 SimonM simon.manqu...@gmail.com Hi, I have some troubles with MVP : as I have understood, the model should just be business objects which are present in a shared package, so client and server can access them from a GWT point of view. In a three layered application how do you not duplicate these business objects, while you have beans used in the business layer ? From what I understand they are the same objects but in two different layers, so we need two different classes. Where is my mistake ? Simon -- You received this message because you are subscribed to the Google Groups Google Web Toolkit group. To post to this group, send email to google-web-tool...@googlegroups.com. To unsubscribe from this group, send email to google-web-toolkit+unsubscr...@googlegroups.comgoogle-web-toolkit%2bunsubscr...@googlegroups.com . For more options, visit this group at http://groups.google.com/group/google-web-toolkit?hl=en. -- http://gwtupdates.blogspot.com/ -- You received this message because you are subscribed to the Google Groups Google Web Toolkit group. To post to this group, send email to google-web-tool...@googlegroups.com. To unsubscribe from this group, send email to google-web-toolkit+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/google-web-toolkit?hl=en.
Re: MVP : model and duplicate
Hi Simon, One question is what do you mean with duplicate? In a client-server environment there is an absolute need to duplicate the value of an object. Because you need it on server and client side. The process is called serialization. However, you can use the same class on both sides. When you client just need a smaller set of attributes than your domain object offers, you need different classes. The latter happens when multiple applications are working on the same domain objects. There are a lot of object/classes which are some how similar but used in different technical context( e.g with/without lazy loading from database) - objects representing database entities (ENTITES) - objects representing domain objects/model objects (DomainObject, Business Objects) - objects representing a snapshot of domain objects (DataTransferObjects, ValueObject) Stefan Bachert http://gwtworld.de On 7 Jul., 11:10, SimonM simon.manqu...@gmail.com wrote: Hi, I have some troubles with MVP : as I have understood, the model should just be business objects which are present in a shared package, so client and server can access them from a GWT point of view. In a three layered application how do you not duplicate these business objects, while you have beans used in the business layer ? From what I understand they are the same objects but in two different layers, so we need two different classes. Where is my mistake ? Simon -- You received this message because you are subscribed to the Google Groups Google Web Toolkit group. To post to this group, send email to google-web-tool...@googlegroups.com. To unsubscribe from this group, send email to google-web-toolkit+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/google-web-toolkit?hl=en.
Re: MVP : model and duplicate
My bad, you're right. I was confused and forgot about Serialization. Thank you for pointing it out ! Simon On 7 juil, 16:19, Stefan Bachert stefanbach...@yahoo.de wrote: Hi Simon, One question is what do you mean with duplicate? In a client-server environment there is an absolute need to duplicate the value of an object. Because you need it on server and client side. The process is called serialization. However, you can use the same class on both sides. When you client just need a smaller set of attributes than your domain object offers, you need different classes. The latter happens when multiple applications are working on the same domain objects. There are a lot of object/classes which are some how similar but used in different technical context( e.g with/without lazy loading from database) - objects representing database entities (ENTITES) - objects representing domain objects/model objects (DomainObject, Business Objects) - objects representing a snapshot of domain objects (DataTransferObjects, ValueObject) Stefan Bacherthttp://gwtworld.de On 7 Jul., 11:10, SimonM simon.manqu...@gmail.com wrote: Hi, I have some troubles with MVP : as I have understood, the model should just be business objects which are present in a shared package, so client and server can access them from a GWT point of view. In a three layered application how do you not duplicate these business objects, while you have beans used in the business layer ? From what I understand they are the same objects but in two different layers, so we need two different classes. Where is my mistake ? Simon -- You received this message because you are subscribed to the Google Groups Google Web Toolkit group. To post to this group, send email to google-web-tool...@googlegroups.com. To unsubscribe from this group, send email to google-web-toolkit+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/google-web-toolkit?hl=en.
