ADF11g: business logic in ADF BC or PLSQL?

Hi All,
For a new development in ADF 11g , where we should put our business logic: In ADF BC or in PLSQL?
What if we write all the bussiness logic in plsql? Because if tomorrow ADF goes(which I know is not ging to happen soon), we can expose pl/sql as web services, and new UI technology can use it. And we will not struggle on migration, as we are struggling today from Forms to ADF.That's what my manager says......
Though I know that we can write our business logic in ADF BC, and that too can be exposed as web service.
But I still need more suggestion on this, which one is better to write bussiness logic.
Thanks
Vikram

We have a team with mixed skill sets, so consequently some of our business logic is in ADF/BC and some is in PL/SQL.
Having some in PL/SQL allows my project manager to divide and conquer the work to be done on an adf project easier than I can train the pl/sql guy to be an adf guy...supposedly.
Also our project manager is also a techy with a primarily pl/sql orientation.
I like Java better because it is new and fun for me, but that is not much of a reason.
I have been to many presentation's of Paul Dorsey's BRIM product. Paul is absolutely certain that you and your manager are doing good when you put business logic in the database. Paul goes even further. I respect him and his arguments are sound.
I still like Java better...mostly because I have done pl/sql for ages and am tired of it. :-)

Similar Messages

Where is the best place to implement business logic in ADF application?

I am using jdeveloper 11g R2 , JSF Facelet
Where is the best place to implement business logic in ADF application?
I mean something like service layer in Spring
Appreciate your comments
Regards
Mohsen

Depends on what your logic does and what data it deals with, but in general business logic is in the ADF BC layer.
Some goes into entity objects - for things like attribute or row validation.
Some goes into view objects - for things like calculation.
Some goes into AM - for things like service methods for UI clients.

Future support for using PL/SQL core business logic with ADF BC

We want to migrate our large Forms client/server (6i) application to ADF, possibly using a migration tool like Ciphersoft Exodus.
One scenario could be to use ADF BC and ADF-Faces or a different JSF-Implementation for presentation and business layer but keep our heavy PL/SQL-businesslogic inside the Oracle database in packages, triggers, functions and procedures.
This scenario could be chosen due to the huge amount of interconnected logic inside the database (10 years of development; no technical components; any package may access any table and more of this kind of dependencies). The business logic nowadays held in Forms client will be moved mainly into the database as a prerequisite to this scenario.
Choosing this "keep-logic-in-DB"-scenario we need a good support by ADF BC to do so. We know and prototyped that it is possible to call some PL/SQL via JDBC from ADF BC and it is possible to use stored procedure calls for standard business entity data access (ins, del, upd, ..). But this does not solve our problems. We want to reuse core business logic coded in PL/SQL. This is much more than change the ADF standard behavior for an update with an own PL/SQL-call.
Now my question:
Will there be a kind of sophisticated support to use ADF BC in combination with database-kept logic?
If so, when will this happen and how will the common problems of transactional state inside the database and inside the ADF BC be solved? Any plans or ideas yet?
Many other clients do have similar applications built in Forms and PL/SQL and would be glad to hear about a path of direction.
I've read the technical article 'understanding the ADF BC state management feature' which you have contributed to. One current limitation is pointed out there: Using PL/SQL with ADF BC limits ADF AM pooling to 'restricted level' which reduces scalability.
Are you aware of additional main problems/tasks to solve when using PL/SQL heavily with ADF BC, which we have to think about?
Thank you for any response.
Ingmar

My main problem is two 'concurrent' areas holding state in an application system based on DB-stored PL/SQL-logic in combination with ADF BC.
For a new System everything can be made ok:
Sure, it is possible to build a new system with the business logic included in ADF BC only. All long-living state will be handled in the BC layer ( including support for UnitsOfWork longer than the webside short HTTP-requests and HTTP-sessions and longer than the database transactions.
For an old system these problems arise:
1. DB data changes not reflected in BC layer:
Our PL/SQL-logic changes data in tables without notifying the ADF BC layer (and its cache). To keep the data in ADF BC entity objects identical to the changed database content a synchronization is needed. BC does not know which part of the application data has been changed because it has not initiated the changes through its entity objects. Therefore a full refresh is needed. In a Forms4GL environment the behavior is similar: We do frequently requeries of all relevant (base)tables after calling database stored logic to be sure to get the changed data to display and to operate on it.
-> Reengineering of the PL/SQL-logic to make the ADF BC layer aware of the changes is a big effort (notifying BC about any change)
2. longer living database transactions
Our PL/SQL-logic in some areas makes use of lengthy database transactions. The technical DB-transaction is similar to the UnitOfWork. If we call this existing logic from ADF BC, database state is produced which will not be DB-committed in the same cycle.
This reduces scalability of ADF BC AM pooling.
Example:
a) Call a DB-stored logic to check if some business data is consistent and prepare some data for versioning. This starts a DB-transaction but does not commit it.
b) Control is handed back to the user interface. Successful result of step a) is displayed
c) User now executes the versioning operation
d) Call another DB-stored logic to execute the versioning. DB-transaction is still open
e) Business layer commits the transaction automatically after successful finishing step d). Otherwise everything from a) to e) is rolled back.
-> redesign of this behavior (= cutting the 1to1 relation between LogicalUnitOfWork and the technicalDatabaseTransaction is a big effort due to the big amount of code.

Where to implement my Business Logic in ADF?

Hi,
I am new to Oracle ADF. I found this forum very useful to get my queries and doubts answered. Thanks to the participants.
I am basically from Struts background,
Where i design my UI in jsp pages using Struts tags,
Actions and some utility classes handles my most of the business logic (generally called as Business Layer)
Then i have custom DAOs or Data Layer to query or update the data in database.
Now as I am into new Project and I have to learn Oracle ADF.
I started learning this by following some questions in the forums and various sites (from Google).
I got info on How to create Entity Objects, Value objects etc.
But my major doubt is where shall i write my Business Logic in this stack?
I can easily drag and drop my data controls into my JSF page and create table, forms or charts. But if i have a multi line business logic, say for a Submit button, In which i may be doing the following steps -
a. Get data pertaining to user role , department, his tenure in the department etc
b. On submit do processing based on data collected in above step.
c. update data in data base.
d. initiate an approval process
e. call some business process for Approval
f. Audit Trail
g. Transaction handling
and so many other steps (I know most of you will have gone through these situation before starting work on ADF)
Now, in the above scenario in Oracle ADF layers where shall i write this whole bunch of logic or steps and then forward the user the page depending upon the outcome of this logic.
Please let me know where to write all this??
Thanks a lot,
Amit
Edited by: ur.amit on May 13, 2010 4:58 PM

Generally speaking all of that code would reside in the app module Impl classes or the View object Impl classes - for VOs and AMs you can expose subclasses and add code in there - you can then define whether any of your methods should be exposed to the client, in which case they appear in the Data Controls panel as operations.
General word of advice -keep business logic code in the Model - don't be tempted to start trying to access your AMs and do any of this stuff from the ViewController project. Keep it nice and simple and just access ALL the business logic code through ADF Model.
Hope this helps
Grant

BPEL Process with complex Business logic

Hi,
So far my knowledge,complex business logic can be implemented by different way in bpel process.
1. Business rule
2. ejb with java callout
3.ADF BC as servcie
Can anybody please suggest which approach do I need to follow,what are the pros and cons of each one,and best practices to use when and where?
Thanx in advance.-Aswini

Hi
In addition to what Naresh already mentioned, you can consider these points also.
1. If your process is complex, see if some part of the process can be common across and it can run by itself. Then you can use SubProcess concepts also. Say for example, if process involves credit card processing, it can be in a sub-process and you can call it in the main process. Like that any common approval flows can be put in a separate sub-process.
2. I would discourage using Java invocations if possible as they have some limitations and you can use reasonable amout of code in invoking java code within the bpel process. If you have lots of validations to do on a bpel process, you can consider using CallBackHandlers and do the validation on a task assignment, submission or any task action in general.
3. Business Rules can be used to control the actual flow of the process itself. Based on busiiness rule, you can decide if a set of tasks needs to be included or not in the approval flow. This is in addtion to the actual data that controls the business rules, that can be changed dynamically without the code change to core bpel process.
Which version of SOA are you using or plan to use. I would recommend the latest version SOA 11.5 + Feature Pack applied.

How to display values after doing some business logic in data action

hi guys i got the same problem but iam unable to display the values..in my display page when iam trying to do some business logic in my data action class..
can u guys help me out
iam pasting my code which iam working here
my struts-config.xml
<?xml version = '1.0' encoding = 'windows-1252'?>
<!DOCTYPE struts-config PUBLIC "-//Apache Software Foundation//DTD Struts Configuration 1.1//EN" "http://jakarta.apache.org/struts/dtds/struts-config_1_1.dtd">
<struts-config>
<form-beans>
<form-bean name="DataForm" type="oracle.adf.controller.struts.forms.BindingContainerActionForm"/>
</form-beans>
<action-mappings>
<action path="/inputform" className="oracle.adf.controller.struts.actions.DataActionMapping" type="oracle.adf.controller.struts.actions.DataForwardAction" name="DataForm" parameter="/inputform.uix">
<set-property property="modelReference" value="inputformUIModel"/>
<forward name="success" path="/inputAction.do"/>
</action>
<action path="/inputAction" className="oracle.adf.controller.struts.actions.DataActionMapping" type="order.view.InputAction" name="DataForm">
<set-property property="modelReference" value="displaypageUIModel"/>
<forward name="success" path="/displaypage.do"/>
</action>
<action path="/displaypage" className="oracle.adf.controller.struts.actions.DataActionMapping" type="oracle.adf.controller.struts.actions.DataForwardAction" name="DataForm" parameter="/displaypage.uix">
<set-property property="modelReference" value="displaypageUIModel"/>
</action>
</action-mappings>
<message-resources parameter="order.view.ApplicationResources"/>
</struts-config>
my input form uix
<?xml version="1.0" encoding="windows-1252"?>
<page xmlns="http://xmlns.oracle.com/uix/controller"
xmlns:ui="http://xmlns.oracle.com/uix/ui"
xmlns:ctrl="http://xmlns.oracle.com/uix/controller"
xmlns:html="http://www.w3.org/TR/REC-html40"
expressionLanguage="el">
<content>
<dataScope xmlns="http://xmlns.oracle.com/uix/ui">
<provider>

</provider>
<contents>
<document>
<metaContainer>

<head title=""/>
</metaContainer>
<contents>
<body>
<contents>
<form name="form0" method="post">
<contents>
<messageTextInput model="${bindings.password}" text="username"/>
<messageTextInput model="${bindings.username}" text="password"/>
<submitButton text="submit" event="success" destination="inputAction.do"/>
</contents>
</form>
</contents>
</body>
</contents>
</document>
</contents>
</dataScope>
</content>
<handlers>

</handlers>
</page>
my display uix
<?xml version="1.0" encoding="windows-1252"?>
<page xmlns="http://xmlns.oracle.com/uix/controller"
xmlns:ui="http://xmlns.oracle.com/uix/ui"
xmlns:ctrl="http://xmlns.oracle.com/uix/controller"
xmlns:html="http://www.w3.org/TR/REC-html40"
expressionLanguage="el">
<content>
<dataScope xmlns="http://xmlns.oracle.com/uix/ui">
<provider>

</provider>
<contents>
<document>
<metaContainer>

<head title=""/>
</metaContainer>
<contents>
<body>
<contents>
<form name="form0">
<contents>
<messageStyledText model="${bindings.password}" prompt="Prompt 0"/>
<messageStyledText model="${bindings.username}" prompt="Prompt 1"/>
</contents>
</form>
</contents>
</body>
</contents>
</document>
</contents>
</dataScope>
</content>
<handlers>

</handlers>
</page>
my model bean
package order.model;
public class TestBean
private String username;
private String password;
public TestBean()
public String getUsername()
return username;
public void setUsername(String username)
this.username=username;
System.out.println("the username after actions class:"+username);
public String getPassword()
return password;
public void setPassword(String password)
this.password=password;
my data Action class
package order.view;
import oracle.adf.controller.struts.actions.DataAction;
import oracle.adf.controller.struts.actions.DataActionContext;
import oracle.jbo.uicli.binding.JUCtrlActionBinding;
import oracle.jbo.uicli.binding.JUCtrlAttrsBinding;
import order.model.TestBean;
import org.apache.struts.action.ActionMapping;
import org.apache.struts.action.ActionForward;
public class InputAction extends DataAction
* Delegate to the Struts page lifecycle implementation
* {@link StrutsJspLifecycle#findForward findForward}
* @param actionContext the lifecycle context for the DataAction
* @throws Exception
protected void findForward(DataActionContext actionContext) throws Exception
// TODO: Override this oracle.adf.controller.struts.actions.DataAction method
//super.findForward(actionContext);
TestBean testbean=new TestBean();
System.out.println("this is action form"+actionContext.getActionForm());
String username=(String)((JUCtrlAttrsBinding)actionContext.getBindingContainer().findCtrlBinding("username")).getInputValue();
System.out.println("this is username"+username);
String username1=username+"hye wats up";
testbean.setUsername(username1);
ActionForward forward=actionContext.getActionForward();
ActionMapping mapping =actionContext.getActionMapping();
System.out.println("this is mapping"+mapping);
mapping.findForward("success");
// To handle an event named "yourname" add a method:
// public void onYourname(DataActionContext ctx)
// To override a method of the lifecycle, go to
// the main menu "Tools/Override Methods...".
check this out iam unable to display in my display page so help me out if any one can

No, in this case, I'm using standard JSP with ADF and struts validator.
If I don't use struts validator and there are errors (such as putting a string into a number which produces a jbo-25009), the list value will be retained.
When using the validator, it appears that it is NOT retained.
I've written some code to attempt to set the list element back, which "looks like" it's working right now.
There's still a problem with the second scenario:
1. user clicks checkbox and hits [submit]
2. get's error - you have to enter 5 address items
3. User wants to backout, so he unchecks the box and resubmits
4. The box redisplays as "checked"
SO, at that point, I thought... can't I use YOUR EXAMPLE on how to handle a checkbox.
I place some code in the reset method of the form to perform this:
map.put("AddressChangeFlag", (String) "" );
(that is, I've detected via the request that this flag is null), so I'm trying to make sure it retains it!
I do that and it runs into a problem during the processUpdateModel aT:
BindingContainerValidationForm updateForm= (BindingContainerValidationForm) actionContext.getActionForm();
//Get the binding for our particular column JUCtrlAttrsBinding checkBoxBinding = (JUCtrlAttrsBinding)updateForm.get("AddressChangeFlag");
call, with an error:
JBO-29000: Unexpected exception caught: java.lang.ClassCastException, msg=java.lang.String
java.lang.String
The value for updateForm.get("AddressChangeFlag") is "", which I'm assuming means the form field is no longer in the request object??
I'm lost at this point, and have been working on it for more than 1 day.
Thanks for responding though, and I await feedback ;)

Bean containing both UI components and business logic

Hello ADF design experts, please guide me.   I came across a critical design aspects. I have main page having bunch of UI components,   Region 1, Region 2. I will have to bind the UI components of the page to a managed bean having session scope and the reason is, when control goes to region 1 or region 2, I will be doing lot of processing of business logic and then based on this, I will have to update the UI components of the page.   Same thing with region 2 also. And then, I should be able to access the information    across regions and also across other UI components etc.
I am seeing only session scoped bean will be able to help me here to get my tasks done across regions and across all other UI components of the page because I am not in a position to pass too many parameters across regions.     Now the problem is, I can not serialize this bean because as I mentioned lot of UI components are updated based on logic.
If I do not serialize the bean, I may have problem in future when application has to be deployed to cluster envt.
I do not know how should I go with my design now.   Please provide me brilliant ideas and very thankful to your guidance.
thanks

Hi ADF,
I dont want to disturb the discussion with you and Alej. I'm rising some question from your first post.
I have main page having bunch of UI components,
ok fine.
Region 1, Region 2. I will have to bind the UI components of the page to a managed bean having session scope
1.why need to do this binding for all ui components .?
2.this question lead ask another question are you using ADFBc.? if so binding layer will take care why you bind all those things.
3.why you need to put session scope.?
if you are using region. the region can only be bounded TF right, then communicate with help of pageflow. inside the bounded you may have jsff/jspx,
reason is, when control goes to region 1 or region 2, I will be doing lot of processing of business logic and then based on this, I will have to update the UI components of the page.   Same thing with region 2 also.
from the reason i have question? why you need to communicate between two region instead of using Taskflow communication.
And then, I should be able to access the information across regions and also across other UI components etc.
ok fine.
I am seeing only session scoped bean will be able to help me here to get my tasks done across regions and across all other UI components of the page because I am not in a position to pass too many parameters across regions.     Now the problem is, I can not serialize this bean because as I mentioned lot of UI components are updated based on logic.
from my point of view. your are using all powerful feature session bean, region communication to do your requirement.
mixing all those things so only you can't able to get consistent results.
I do not know how should I go with my design now.
could you please explain your usecase.
Please provide me brilliant ideas and very thankful to your guidance.
yeah sure. people will do.
thanks

Coding custom business methods in ADF BC Application Module ?

Dear All,
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Thanks,
Raghavendra

Hi,
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Business Logic in Oracle Applications (General Question)

Hello everyone!
I am relatively new to Oracle Apps and interested in learning and joining this community.
I was trying to figure out how is the Business Logic programmed in E-Business Suite. Is it just PL/SQL or is it BC4J? Is there anyone who could help me answer this question or point me in the right direction (I went through the documentation very quickly (it is rather large so it was only "briefly") and could not find anything that would answer my question exactly)
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Any help is much appreciated !

Just to expand on Bala's answer, it depends on how your application is architected.
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If you have a OA Fwk based application, then your BL could reside either in BC4J or PLSQL. There are OA Fwk applications that are written that performs some business logic execution within the middle tier and passes the rest to underlying PLSQL code. Take for example an application that was originally written in Forms but later on extended or migrated to OA Fwk. Since most of the BL was already written in PLSQL and some of the forms would still be using the same PLSQL APIs, it essential that the OA Fwk based application too uses those APIs to be in synch.
If you are designing a new application to be based on OA Fwk, it is strongly recommended that you go with your BL as much as on the middle tier.
So it all depends... :)
Thanks
Vijay

Business Logic across applications

Is it possible to share business logic between multiple applications (different workspaces). If yes, what is the bext way to do it so that when the business logic (in a centralized location) changes all the applications will be updated with the new change. Is this even feasible and will that require re-deployment?
Any thoughts on this is appreciated.
Thanks.

You didn't specify what type of business logic and what technologies you are looking at.
But for example with ADF Business Components here is what you can do:
http://download.oracle.com/docs/html/B25947_01/bcadvgen007.htm#CHEFECGD

Using Business Rules with ADF

I would like to use oracle business rules to handle the business logic in an ADF based application; can anyone advise me where to do this? I am thinking as either a custom service method or in the same way as validation on a view-object. Ultimately i need to work with data from multiple tables so the enitity object level is not really appropriate.

Hi
Does anyone know the answer to this one?
Here is another one: Where in a View Object (that represents a detail record made up of 3 EOs in a Master/detail configuration) during the creation of the View Object would you call out to a Rule so that the Rule could populate a data field in the View Object?
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Ted

Can we use WHO columns in Business Logic implementation

Hi,
Can we use WHO columns for business logic implementation..?
From one table I need to pick up the latest record. I have a ActionDate column in the table which stores the date of the action.
But on the same day there can be multiple action records. ie Multiple records have same ActionDate.
Select * from action_table where action_date=(maximum action_date)
The above query will return more than 1 record.
Now can I use the Creation_Date which is a WHO column to identify the latest record..?
Will it introduce any issues if I use creation_date WHO column?
Usage of WHO column in application logic, Is it against the Standards ?
Thanks a lot.

I guess you are talking about populating the value using the history column creation_dt from EO.
If so, you can use then. We are using them in all our applications to populate WHO columns of our table.
Infact as far as I know, even Oracle application uses them.
They generally populate the timestamp, so you may need to format them when doing date comparisons.
Hope that helps.
Amit

Problem in creating a callable object of type Business Logic

Hi SDN,
I am trying to create a callable object of type Business Logic in CE.
When I give all information and click Next, I get this error message.
Error while loading configuration dialog: Failed to create delegate for component com.sap.caf.eu.gp.ui.co.CExpConfig. (Hint: Is the corresponding DC deployed correctly? Does the DC contain the component?)
Can anybody help me out with this problem.
Regards,
Sumangala

Hi.
I'm having the same problem as Senthil in NW2004s SP15 with my application service and methods not showing up in the Callable Object wizard for Composite Application Services after I choose the Endpoint. The only application name that shows up in the wizard is caf.tc, and the only service names that show up for it are LDDataAccessor, Metadata, and PropPermissionService.
My IDE is on one machine and the application server I deploy to is located on a different machine. My endpoint to the remote application server looks to be correctly configured. The Composite Application Service seems to be deployed properly as I'm able to see it and test that it works in the Web Services Navigator <http://remotehost:50000/wsnavigator/>
My deployed application service is a remote enabled service and is also web services enabled as well.
I'm not sure if this is relevant, but I noticed that the generated Java code does not create any remote EJB interfaces (only home and local interfaces were generated).
Something else I noticed is that when I proceed to the External Service Configuration -> Business Entities screen <http://remotehost:50000/webdynpro/dispatcher/sap.com/cafUIconfiguration>, I only see three business entities displayed, and the following error message is displayed: "Corrupt metadata has been detected. This may prevent some objects from being displayed. Check the server log for more details." I was unable to find anything in the instance log files. Is the error message indicative of the problem?
I am developing locally without a NetWeaver Development Infrastructure (NWDI) in place.
I'm wondering if the credentials specified in the endpoint require any special roles or privileges.
Senthil, do any of these additional descriptions apply to you as well?
Edited by: Ric Leeds on Jun 20, 2008 4:37 PM

Developing Business Services with ADF BC

Hello all,
I was following the tutorial at http://www.oracle.com/technology/obe/obe1013jdev/10131/bslayer/bslayer.htm#t2s5, which is Developing Business Services with ADF Business Components
AND i was wondering if i could add a custom validation that would: prevent the user from entering a Gender IF the credit limit is greater than 400? Is this possible? If so, could some point me in the right direction
Cheers

Hi,
you have two options:
1. add the validation on the ADF BC model using a method validator. This would compare the two attributes and throw an exception if the business rule is violated
2. Use a ValueChange Listener on the credit limit field (in association with a autosubmit=true setting on the field) to enable the gender field through a Partial Page Refresh. To programmatically refresh a field using PPR, you create a binding of the component to refresh o a managed bean using its binding property. Then you call
AdfFacesContext.getCurrentInstance().addPartialTarget(<component reference here>)
Frank

10.1.3.1 : Developing Business Services with ADF BC tuto issues

Hi,
I was doing a learning session at my office based on the 'Developing Business Services with ADF Business Components' tutorial : http://www.oracle.com/technology/obe/obe1013jdev/10131/bslayer/bslayer.htm. The topic Creating ADF Business Components > 9 shows how to create EOs, VOs, AM and the corresponding UML diagram.
When using JDev 10.1.3.1 :
* the diagram is not generated as expected,
* the java domains are not created from DB domains.
Under JDev 10.1.3.2 :
* the java domains are created from DB domains,
* the diagram has been generated on 1 out of 3 computers.
Any clues on what's going on or any known bugs ?
Thanks,
Seb.

Hi,
Today in 10.1.3.1 the diagram generation just works. It seems the keepResident extension was causing troubles as the exception stack trace mentioned its name... I just removed it.
But still, the domains are not generated as expected. I've made several tests even in a fresh installation of JDeveloper 10.1.3.1.
Seb.

ADF11g: business logic in ADF BC or PLSQL?

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