Patterns/Best Practises

Are there any patterns/Best Practises documentation regarding JSF ?

here is an article, with shows you how to use JSF
with the core j2ee-pattern
http://www.eccodynamics.com/tiles/en/articles--demos.jsp
cheers

Similar Messages

Best practise - Domain model design

Hello forum,
we're writing an application divided into three sub projects where one of the sub projects will be realized using J2EE and the other two sub projects are stand alone fat client applications realized using Swing. So that's the background...
And now the questions:
After doing some research on J2EE best practise topics I found the TransferObject-Pattern (http://java.sun.com/blueprints/corej2eepatterns/Patterns/TransferObject.html) which we certainly want to apply to the J2EE sub project and to one of the standalone client applications also. To avoid code duplications I like the "Entity Inherits Transfer Object Strategy" approach outlined in the document referenced above. But why does the entity bean inherit from the transfer object class and not vice versa? In my opinion the tranfer object adds additional functionality (coarse grained getData()-method) to the class and isn't it a design goal in OO languages that the class that extends a base class has more functionality than the base class?
For the standalone application we want to use a similar approach and the first idea is to desgin the entitys and let the TO classes extend these entitys.
When I get it right the basic idea behind all of these design schemes is the "Proxy pattern" but when I design it using the previously mentioned way (Entity <-- EntityTO) I will have a very mighty prox beeing able to execute all operations the base class is able to execute.
Any tips and comments welcome!
Thanks in advance!
Henning

Hello Kaj,
at first - thanks for your fast response and sorry for coming back to this topic so late.
After reading a bit more on patterns in general what about avoiding inheritance
completely and using the proxy pattern instead (As explained eg.
http://www.javaworld.com/javaworld/jw-02-2002/jw-0222-designpatterns.html here) - so moving the design to a "has a" relationship rather than an "is a" relationship.
In the previous post you said that the client shouldn't be aware that there are entity beans and therefore the mentioned implementation was chosen - But if I implement it vice versa (Entity is base class, TO extends entity) and do not expose any of the methods of the entity bean I would achieve the same effect, or not? Clients are only able to work with the TOs.
I have some headaches implementing it in SUN's recommended way because of the Serialization support necessary within the TOs. Implemented in SUN's way the Entity bean would also have serialization support which isn't necessary because they're persisted using Hibernate.
Thanks in advance
Henning

Suggest me the best practise for accesing database by JSP page

Hi,
Can you please suggest me the best practises to connect to database through JSP page.
I am using the Struts-Portlet environment. And I have to display some contents from the database to the jsp page(view.jsp).
Please suggest.
Saurabh.

If you know how to use struts and portlets, you wouldn't be asking this question. I suggest looking into the Model-View Controller pattern to get an idea how to set up a web application, then think about how to do it in a portlet environment.

Any best practise to archive PO's which does not have corresponding invoice

Hello,
As part of initial implementation and conversion, We have a lot of PO's / LTA created but their corresponding invoices were never converted into SAP from legacy system. SAP archiving program tags those as not business complete as the invoice qty does not match with po qty (there are no invoices to start with). Just flagging 'delivery complete and final confirmation' of PO does not help. Anybody ran into similar situation and how did they resolve it? I am reluctant to enhance standard SAP archiving program to bypass those checks and that is my only last option. Any SAP recommended Note / best practise etc would help.
Satyajit Deb

Where is the invoice posted?
was the invoice posted in the legacy system?
Clearance of GR/IR account with MR11 will usually close such POs.

When granting a user or a role access to a group of pages, it is best practise to grant that access to what type of file or component?

My question is same while granting user or role in the application, what is the best practise? How to decide the level of applying role to pagedef's, xml files, or some other file that i have missed out.

As for my concern I would go for page definition files.

Best practise in SAP BW master data management and transport

Hi sap bw gurus,
I like to know what is the best practise in sap bw master data transport. For example, if I updated my attributes in development, what are the 'required only' bw objects should I transport?
Appreciate advice.
Thank you,
Eric

Hi Vishnu,
Thanks for the reply but that answer may be suitable if I'm implementing a new BW system. What I'm looking for is more on daily operational maintenance and transport (a BW systems that has gone live awhile).
Regards,
Eric

What is the best practise to provide a text file for a Java class in a OSGi bundle in CQ?

This is probably a very basic question so please bear with me.
What is the best way to provide a .txt file to be read by a Java class in a OSGi bundle in CQ 5.5?
I have been able to read a file called "test.txt" that I put in a structure like this /src/resources/<any-sub-folder>/test.txt from my java class at /src/main/java/com/test/mytest/Test.java using the bundle's getResource and getEntry calls but I was not able to use the context.getDataFile. How is this getDataFile method call to be used?
And what if I want to read the file located in another bundle, is it possible? or can I add the file to some repository and then access it - but I am not clear how to do this.
And I would also like to know what is the best practise if I need to provide a large data set in a flat file to be read by a Java class in CQ5.
Please provide detailed steps or point me to a how to guide or other helpful resources as I am a novice.
Thank you in advance for your time and help.
VS

As you can read in the OSGi Core specification (section 4.5.2), the getDataFile() method is to read/write a file in the bundle's private persistent area. It cannot be used to read files contained in the bundle. The issue Sham mentions refers to a version of Felix which is not used in CQ.
The methods you mentioned (getResource and getEntry) are appropriate for reading files contained in a bundle.
Reading a file from the repository is done using the JCR API. You can see a blueprint for how to do this by looking at the readFile method in http://svn.apache.org/repos/asf/jackrabbit/tags/2.4.0/jackrabbit-jcr-commons/src/main/java /org/apache/jackrabbit/commons/JcrUtils.java. Unfortunately, this method is not currently usable as it was declared incorrectly (should be a static method, but is an instance method).
Regards,
Justin

Advice or best practise information about 1 or 2 clients in SAP R/3 DEV

I'm searching for advice or best practise information about clients in a SAP R/3 development system.
Reason for this is that we are up to refresh our SAP R/3 development system and up to now we have two clients on it:
- One customizing/development client without master data, transaction data et cetera
- One local test client with master data, transaction data and so on
One of our developers suggested to only have one client on development, where we could customize, program and test. So that client would be with master data, transaction data et cetera.
What would be your advice or what would be best practise for the development system: 1 client (with data) or 2 clients (one clean customizing and one with data). And what are the most important reasons to do it so.
Maybe there is already some good (SAP) information about this specific subject, but up to now I havenu2019t found it yet.

Maybe I've asked my question too broad. I'll try to narrow it down.
Up to now we always had two clients on our SAP R/3 development system:
- Client 200 - Customizing/development only. No other data in this client
- Client 400 - Local test client with master data and transaction data. New customizing is copied from client 200 to test
The reason for having those two clients are:
- It feels someway good to have a customizing-only client
- We've always done this before
A developer suggested to only have one client in our SAP R/3 development system for the following reason:
- You'll never need to copy the customizing (tr.SCC1) first to be able to test it
- You can work in one client and don't need to login in the other client to test it (for example: ABAP reports)
- For customizing of easy setting (for example producthiërarchie, as we don't test it everytime in client 400) it is possible to forget copying it into client 400 (test client). With one client, you can not forget it
The reasons of this developer seems very valid and up to now we haven't found a convincing/compelling reason to make a good choice for one or two clients.
Please, try to convince us with good reasons to choose for one or two clients.

Experiences on SAP Best Practise packages?

We are considering applying a specific SAP Best Practise package on top of ECC6. It will be a new ECC6 installation.
I have read the BP faq pages http://help.sap.com/bp_bw370/html/faq.htm and read note 1225909 - How to apply SAP Best Practices - and the specific note and the specific installation guide for required Best Practise package.
I understand that applying a BP package is something not that easy but should speed up the implementation process.
If you have been participating in a project that implemented SAP Best Practises on ERP, would you please share your experiences with me.
Here are some topics for discussion:
(BP=SAP Best Practise package)
BP implementation could make constraints to your future EHP or SP upgrades, while BP is tightly linked to certain EHP and SP-level?
SAP support?
Installation process including config steps according BP installation guide is longer than usual, while there can be multiple activation and configuration steps done by others than basis consultants?
BPs are country dependent. What if your application is used multinationally?
What if you later find BP unneccessary?
generate difficulties in the beginning but did considerably speed up reaching the final goal compared to ECC6 without BP.
traps to fall in?
typical issues that basis staff has to notify when preparing/installing a ERP system to be with BP?
positive/negative things
I am not saying above statements are true or false. Just wanted to charge you giving comments.
Br: KimZi
Edited by: Kimmzini Siewoinenski on Aug 11, 2009 8:35 PM

Hi,
Make sure your web service URL correct in Live Office connection and also in Xcelsius data manager.
Did you check all connection in refresh button proprties? you may try selecting "Refresh after component are Loaded" in Refresh button properties Behavior tab.
I think Xcelsius refresh are serial refresh so it may be possible that first component refresh is still in progress but you are expecting other component to refresh.
Click on "Enable Load Cursor" in data manager's Usage tab, it will give you visibility of refresh. If anything refreshing you will see hour glass.
Cheers

Design Patterns/Best Practices etc...

fellow WLI gurus,
I am looking for design patterns/best practices especially in EAI / WLI.
Books ? Links ?
With patterns/best practices I mean f.i.
* When to use asynchronous/synchronous application view calls
* where to do validation (if your connecting 2 EIS, both EIS, only in WLI,
* what if an EIS is unavailable? How to handle this in your workflow?
* performance issues
Anyone want to share his/her thoughts on this ?
Kris

          Hi.
          I recently bought WROX Press book Professional J2EE EAI, which discusses Enterprise
          Integration. Maybe not on a Design Pattern-level (if there is one), but it gave
          me a good overview and helped me make some desig decisions. I´m not sure if its
          technical enough for those used to such decisions, but it proved useful to me.
          http://www.wrox.com/ACON11.asp?WROXEMPTOKEN=87620ZUwNF3Eaw3YLdhXRpuVzK&ISBN=186100544X
          HTH
          Oskar

ECC 5.0 and BO without BW/BI Integration Best Practise

Hi,
I know that SAP can connect with BO system using RapidMart (replacing data warehouse BW/BI). Is this best practise?Because when i see the BI Platform RoadMap,I conclude that BI and BO will be integrate into one product, and i'm afraid to invest right now because in the future it seems we need to implement the BW system to make this BI system optimal.
My company want to use BO without implement BW system right now. SAP system that we use right now is ECC 5.0 and my company only upgrade it to next version when version 5.0 not supported again.Thank you.
Cheers,
Satria

Hi Satria,
the answer depends a little bit on what the requirement is.
RapidMarts are an option to implement a data mart solution on top of an ERP solution. On top of the Rapid Marts you can then use the BusinessObjects tools without hitting the OLTP system directly.
Ingo

BEST PRACTISE on users deletions HR/SU01

Hi
we use CUA/SSO.
The records are fed from HR records and sent to Active Directory (AD)
AD brings backs the records and creates/changes users in SU01
A function module populates the CVR (timesheet) parameter dependent on whether you are an employee or a contractor
Occasionally, our HR department request records to be deleted from the SAP Support team - for example if the employee or contractor hasn't in fact joined the company.
Until some time ago, the deletion was causing problems because:
a) the record does not get deleted in AD and there is no way to send the deletion across after
b) when AD tries to reprocess that specific record, LDAP connector will not find it as HR record so what happens in SU01 for some reasons, the VALID from field gets wiped out and the CVR parameter for Timesheet also...
We have changed the process for the deletion however, I would like to ask if you know what is the best practise for this?? HR want to delete the record so it can be re-utilised
I cannot delete those records from UMR unless I am 100% sure they have never used the system (will have to check that)
I hope I have provided enough info on what the issue is..
Thank you
Nadia

Best practice is not to delete.
> HR want to delete the record so it can be re-utilised
So many people with the same name? Perhaps a suffix of 2 numbers when the ID naming convention produces a clash. Besides, do your AD admins not want unique names in the AD as well?
E.g. (just an imperfect example)
MUSTERMA = Alfred MUSTERMan
MUSTERMM = Manfred MUSTERMan
MUSTER01 = Mechtilde MUSTERMuller
> I cannot delete those records from UMR unless I am 100% sure they have never used the system (will have to check that)
Surest way is to determine that they have never logged on before. But that does not exclude that records might exist for them, which may eventually do a "user existence check" to be read. One such example is the Security Audit Log, e.g. there may have been failed login attempts.
Good luck,
Julius

Transport landscape best practise

I'm wondering if SAP has a best practise document on transport landscape planning.
SAP Help has pretty clear description about a standard 3 system landscape. But not document is found describing complext transport landscape considerations --- multiple ABAP development/test systems, conflict resolution between project landscape and maintenance landscape.
Any feedback is greatly appreciated.

Hi. GO to http://help.sap.com/bp/initial/index.htm
There you find all about BP.
Regards, Award if helpful

Configure "best practise baseline" manually

Dear experts!
I'm studying SAP ERP as a student. I am interesting in SD. I have read the certification material TSCM and SCM.
Now I am waiting for your advice whether I need to configure "best practise baseline" manually.
We see, it will take a lot of time to configure "best practise baseline" manually.
However, I was thinking that it would be helpfull to my general view on ERP, as well as, I can use it to study "best practise industry" when I complete it.
How do you think?
Waiting for your advice!
Thank you!
Best regard!
Tang Dark

Hi,
Best Practises is a specific SAP solution and to get it you have to specifically buy it - it doesn't come standard with every ERP solution.
What is Best Practises? Best Practises is basically a set of pre configured stuff (BC sets) which you upload into SAP, hence reducing your configuration.
Baseline is basically the general configuration (per module) that a company requires to carry on with config. Things like org structure, etc.
On top of the baseline you can then start loading other more specific BC sets per module.
Best Practises is a methodology to address smaller companies because it reduces the blueprint and configuration phases. Projects can be finalised within 6 months compared to std ERP implementations that may take 1 to 2 years.
If you want to be a proper SD consultant do not study Best Practises only. Do your SAP academy. Best Practises you can learn after you know SAP.
As to Industries specific, these are add-ons to address specific industry requirements. For example, bills of services, is something used in project environments such as engineering & construction. So the funcitonality is not necessary, for example, the retail industry which sells only finished products.
Again, firs learn your SAP and then you can focus on learning others. If you learn SAP you can work on any Best Practices package or any Industry, If you study Best PRactises you can only work with BP, and the same goes for industry solutions.

Best practise for SAP users who leave the company

Hi
Could anyone reccommend a best practise document or give advice on how to deal with SAP user ID's when employee's/contractors/consultants leave? I am the basis admin just starting an SAP implementation and we have no dedicated authorisation team at the moment, so I have been asked to look into this :
Currently we set the validity date in SU01 to the termination date.
We chack there are no background jobs scheduled under that user id, if there are, we change the job owner to a valid user (we try to run all background jobs under an admin account).
We do not delete the user as from an audit point of view I believe it restricts information you can report on and there are implications on change documents etc, so best to lock it with validity dates.
Can anyone advise further?
We are running SAP ECC 5.0 on Windows 2003 64 Bit/MS SQL 2000.
Thanks for any help.

Hi,
Different people will tell you different versions of what they believe is best practice, but in my opinion you are already doing reasonably well.
What I prefer is
1. Lock ID & set validity date.
2. Assign user to user group LEAVER or EXPIRED or something similar (helps with reporting) out of SUIM/S_BCE* reports.
3. Delete role assignment (should you need it, the role assignment will be in the change history docs anyway).
4. Check background jobs & act accordingly.
For ease of getting info I prefer not to delete the ID though plenty of people do.

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