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CIS 764 Database Systems Engineering
L7. ADF + EJB
Context: Oracle Application Development Framework
…but … only EJB homework for now.
Fall 2007
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CIS 764 Database Systems Engineering
Oracle Fusion
http://en.wikipedia.org/wiki/Oracle_Fusion_Middleware
… the whole middleware suite …
application server (including OC4J)
BEPL manager (business process execution language)
business rules system
messaging service
ADF
<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<
JDeveloper
Toplink
Forms services
Business Intelligence tools (monitoring, mining, analysis)
Portal & portlets
Identity & single sign-on
… others..
the integration of eBus components (as PeopleSoft) into a SOA.
Fall 2007
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CIS 764 Database Systems Engineering
eWeek.com January 19, 2006
“ The lack of detail in Oracle's Fusion Application presentation
suggests to some industry experts that the company is not
at the halfway point in developing a merged suite. “
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CIS 764 Database Systems Engineering
ADF
http://en.wikipedia.org/wiki/Oracle_Application_Development_Framework
included in JDev,
ADF is the conceptual model, components, and wizards
possible model components:
EJB, WebService, TopLink, ADF_business_components
controller:
Struts, JSF (Java Server Faces)
view:
Swing, JSP, JSF
all components conf via XML, for easy reconfig, reuse.
Fall 2007
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CIS 764 Database Systems Engineering
ADF Index Page
http://www.oracle.com/technology/products/adf/index.html
ADF Overview,
http://www.oracle.com/technology/products/jdev/collateral/
papers/1013/adf_10.1.3_overview.pdf 11 pages, 2006
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CIS 764 Database Systems Engineering
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CIS 764 Database Systems Engineering
Fall 2007
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CIS 764 Database Systems Engineering
GUI components
Swing … only in Java apps (not in server)
JSP ….. Weak components (button, form ),
not automated data binding.
JSF …. Web components , w data binding .
ADF Faces … Oracle’s own extensions of JSF
and with DB binding for use in apps.
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CIS 764 Database Systems Engineering
http://www.oracle.com/technology/products/adf/learnadf.html
ADF Learning Center:
two tracks:
* IDE Fusion … JSF, ADF Faces, ADF Model, ADF Business Components
http://www.oracle.com/technology/products/jdev/viewlets/1013/
ADF_Overview_Viewlet_viewlet_swf.html an animation
and SC example
* Java programmer…. JSF, ADF Faces ,ADF Model , EJB3.0, TopLink
Fall 2007
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CIS 764 Database Systems Engineering
http://www.oracle.com/technology/obe/ADF_tutorial_1013/ADF_tutorial.pdf
170 pp … pdf for sample application,
ServiceCompany .. Service requests for large appliances
http://www.oracle.com/technology/obe/ADF_tutorial_1013/index.htm
index page for the following:
http://www.oracle.com/technology/products/jdev/samples/srdemo.html
completed SC demo web app (required JUnit extension to JDev)
http://download.oracle.com/otn_hosted_doc/jdeveloper/1013/adfdevguide.pdf
674 pp ADF guide !
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CIS 764 Database Systems Engineering
Assignment: just listen to the following
Steve Muench , ADF weblog
http://radio.weblogs.com/0118231/stories/2005/06/24/jdeveloperAdfScreencasts.htm
l
Select #4: ( animated demo w audio)
Creating a Databound, Master/Detail Swing Panel Using JGoodies Form Layout
http://www.oracle.com/technology/products/jdev/tips/muench/screencasts/
simplejgoodies/binding_demo.html?_template=/ocom/ocom_item_templates/print
Fall 2007
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CIS 764 Database Systems Engineering
EJB3
POJO + Annotations => EJB
EJB 3.0 Resources
http://www.oracle.com/technology/tech/java/ejb30.html
Introduction:
http://www.oracle.com/technology/tech/java/newto/introejb.htm
or
Java World: (has more code examples)
http://www.javaworld.com/javaworld/jw-08-2004/jw-0809-ejb.html
Fall 2007
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CIS 764 Database Systems Engineering
Entity bean … bound to entity data,
with unique key value;
can contain multiple subitems.

where is the concept of a result set ?
Session bean …
 “session beans generally represent actions …” << bad OO !
“process entity” vs “data entity”
Stateless … “do not have internal state” (  )
… rather: do not keep track of the callers state !
Statefull …..maintains the conversation state across
multiple method invocations
(e.g. a shopping cart)
Beans have an associated deployment descriptor
Beans have own QL … “OO version of sql “
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CIS 764 Database Systems Engineering
EJB annotations
http://www.fnogol.de/archives/2005/05/13/ejb-30-annotations-cheat-sheet/
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CIS 764 Database Systems Engineering
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CIS 764 Database Systems Engineering
import javax.ejb.Stateless.*;
@Stateless(name="CalculateEJB")
public class CalculateEJBBean
implements CalculateEJB
{
int value = 0;
public String incrementValue()
{ value++;
return "value incremented by 1";
}
}
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CIS 764 Database Systems Engineering
import javax.persistence.*;
import java.util.ArrayList;
import java.util.Collection;
@Entity
@Table(name = "EMPLOYEES")
public class Employee implements java.io.Serializable
{
private int empId;
private String eName;
private double sal;
@Id
@Column(name="EMPNO", primaryKey=true)
/* getters and setters here … see next slide
}
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CIS 764 Database Systems Engineering
public int getEmpId(
) { return empId; }
public void setEmpId(int empId) { this.empId = empId; }
public String getEname(
) { return eName; }
public void setEname(String eName) { this.eName = eName; }
public double getSal(
) { return sal; }
public void setSal(double sal) { this.sal = sal; }
public String toString()
{
StringBuffer buf = new StringBuffer();
buf.append("Class:").append(this.getClass().
getName()).append(" :: ").append(" empId:").append(getEmpId()).
append("
ename:").append(getEname()).append("sal:").append(getSal());
return buf.toString();
}
??? Why the toString method <<<<<<<<<<<<<<<<
??? Why ArrayList and Collection
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CIS 764 Database Systems Engineering
import javax.naming.Context;
import javax.naming.InitialContext;
public class CalculateejbClient
{
public static void main(String [] args)
{ Context context = new InitialContext();
CalculateEJB myejb =
(CalculateEJB)context.lookup("java:comp/env/ejb/CalculateEJB");
myejb.incrementValue();
}
}
??? Where does this “client” run ??
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CIS 764 Database Systems Engineering
Homework:
Oracle EJB3 Simple Tutorial
http://www.oracle.com/technology/obe/obe1013jdev/10131/10131_ejb_30/ejb_30.htm
Do an “in essence” version for the PO DB.
Note: this is not a web app. The client has remote access to the bean.
Post snapshots in JDev and running the client.
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CIS 764 Database Systems Engineering
Note: Future requirements:
Contribute some tutorial content …
Contribute some technical presentation ….
… prior approval of topics is required.
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CIS 764 Database Systems Engineering
end.
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