i run jpetstore spring mvc application, i have doubt, that is how many layers it have ?. it has view, controller, service, bo,dao,persistance layer,and data base
I want to know, how request is processed ? from browser to database hit . How many layers involved?
I think following layers involved please clarify
1a) Presentation Layer (Spring mvc)
b) Business Service Layer (Spring POJOs)
c) DAO Layer (Hibernate DAO Classes of Spring)
d) ORM Layer (Hibernate)
e) Database
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Hong Anderson
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vbala vmurugan wrote:
I think following layers involved please clarify
1a) Presentation Layer (Struts)
b) Business Service Layer (Spring POJOs)
c) DAO Layer (Hibernate DAO Classes of Spring)
d) ORM Layer (Hibernate)
e) Database
c, d, e can be grouped as Persistence Layer.
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vbala vmurugan
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thank you for your kind replay.
jpetstore application has just 3 layers. i am corret ?
1) PRESENTATION LAYER
a) View (jsp)
b) Validators
c) FormBeans
d) Controllers
2) BUSSINESS LAYER
a) Transactions
b) Services with interfaces -
c) Data transfer object
3) PERSISTANCE LAYER
a) DAO Layer (Hibernate DAO Classes of Spring)
b) ORM Layer (Hibernate)
c) Database
please clarify
regards
bala
Hong Anderson
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vbala vmurugan wrote:
1) PRESENTATION LAYER
a) View (jsp)
b) Validators
c) FormBeans
d) Controllers
Validators are not in Presentation layer, you can use validators in other layers as well.
I never read jpetstore source code, so I couldn't tell how many layers it has.
I think Validators should be in Business Layer.
kri shan
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You can add POJO layer with DAO layer and ORM layer as Persistence layer.
vbala vmurugan
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Posts: 10
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thank you for your kind replay.
1) PRESENTATION LAYER
a) View (jsp)
b) FormBeans
c) Controllers
2) BUSSINESS LAYER
a) Transactions
b) Services with interfaces -
c) Data transfer object
d) Validators
3) PERSISTANCE LAYER
a) DAO (Hibernate DAO Classes of Spring)
b) ORM (Hibernate)
c) Database
d) POJO layer
is it correct now ? please clarify
regards
bala
Hong Anderson
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Joined: Jul 05, 2005
Posts: 1936
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What is POJO layer?
vbala vmurugan
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Joined: Jun 20, 2008
Posts: 10
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vbala vmurugan wrote:thank you for your kind replay.
sorry pojo is not layer
1) PRESENTATION LAYER
a) View (jsp)
b) FormBeans
c) Controllers
2) BUSSINESS LAYER
a) Transactions
b) Services with interfaces -
c) Data transfer object
d) Validators
3) PERSISTANCE LAYER
a) DAO (Hibernate DAO Classes of Spring)
b) ORM (Hibernate)
c) Database
d) POJO
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