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 Business Objects
 Business Object Framework
 Persistent Objects
 Transient Objects
 EDL Modeling
 Implementations of Business objects

Pipeline Processor ISML
Start Node Pipelet Pipelet ISML-Template Java Template
Server Processor
Page
*.jsp
Request
Handler
Servlet Pipeline Dictionary

Business Object Servlet
BO Layer Engine
(Tomcat)
Webserver *_jsp.java
PO Persistent Object
Webadapter PO PO Layer

Persistent Object Cache
Java
Compiler
*_jsp.class (javac)
Servlet
Engine
(Tomcat)

*_jsp.class

 Introduce a new layer above the persistence layer
 ORM Layer  State
 BO Layer  Behavior

 Make domain-concepts explicit in the API
 Provide concepts for customization and extension
 Support multi-application and multi-tenancy nature of
Intershop 7
 Encapsulate everything important for a certain business
domain

 Represents a certain business functionality that "belongs together".
 Consists of entities, value objects, repositories, extensions and context objects

 Represent business objects that have an identity
 Provide methods that have a meaningful business function to modify internal state
 Root entity as single entry point into an aggregate
 All other entities reachable by navigation from root entity only

 Value objects are defined by the values of their attributes

 Manages the lifecycle of the root entity
 Creation
 Retrieval
 Deletion

 Only one repository per aggregate

 Provide additional methods that operate on a business object
 Are attached to the host object
 Are created by an Extension Factory
 Can be restricted to some business objects only

 Every Business Object lives in a Context
 Created by someone who wants to use the Business Object Layer (App layer)
 Holds the extension factories that can be used
 Typically: lifespan of one request
 (Also holds the cache for Business Objects)

 One specific Implementation type of Business Objects (BO)

 Mapping to Database Structures by ORM Engine

 Represent just Data, no Business Logic

 Examples: ProductPO, CatalogPO

 Intershop 7 provides two different ways of Java object implementations:

 Persistent Objects (PO), encapsulated by business interfaces,
access via corresponding manager classes
 This is the Enfinity Suite 6 approach, currently still used in most of the backoffice parts

 Business Objects (BO) which are business interfaces and can be wired to different
implementations, access via corresponding repository classes
 This is the genuine IS 7 approach, currently mainly used in storefront

 In the context of POs, a relationship between two classes indicates a link between the
database tables underlying the POs.

 Intershop 7 is uses mostly two basic relationship types:
 Association relationships
 Weak relations

 Association relationships express
 a unidirectional or
 bidirectional

semantic connection between classes.

 Weak relations express a unidirectional
relationship between classes
 "Unidirectional" in this context means
that the relationship is only navigable
in one direction

The weak relation connecting WarehousePO
and Address expresses that we only
navigate the relationship from WarehousePO
to Address, never the other way around

 EDL
 Is a textual domain-specific language (DSL) for modeling business objects for Intershop 7

 An EDL file typically consists of:
 imports for other EDL files that contain referenced types
 primitive type declarations
 external type declarations
 namespace declarations
 complex type declarations

 Recommendations:
 Just 1 EDL file per object (no technical limit)
 Use the non-graphical EDL Model Editor (performance)

Imports

Namespace

Object Definition
Object Attributes
Modifier

ORM Relation

<<class>> <<class>> <<class>>
AbstractDomainRepositoryBOExtension AbstractExtensibleObjectBO AbstractBusinessObject

«interface» «interface»
BusinessObjectRepository BusinessObject

<<class>>
WarehouseBORepository «interface» «interface»
WarehouseBO StockBO

<<class>> <<class>> <<class>>
ORMWarehouseBORepositoryImpl ORMWarehouseBOImpl ORMStockBOImpl

<<class>> <<class>>
WarehousePO StockPO

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Intershop bo

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Editor's Notes