Localization design patterns with TopLink

Hello,
We are creating web app with JSF and TopLink.
Each table in database may have several fields that can be localized.
All localization resources are stored in a table that has such columns: table_name, column_name, language, localized_text.
How would you suggesting implement localization using TopLink?

Sorry, I missed one column.
Columns in localization table: table_name, column_name, row_id, language, localized_text.

Similar Messages

Producer/Consumer Design Pattern with Classes

I'm starting a new project which involves acquiring data from various pieces of equipment using a GPIB port. I thought this would be a good time to start using Classes. I created a GPIB class which contains member data of: Address, Open State, Error; with member vis such as Set Address, Get Address, Open, Close...general actions that all GPIB devices need to do. I then created a child class for a specific instrument (Agilent N1912 Power Meter for this example) which inherits from the GPIB class but also adds member data such as Channel A power and Channel B power and the associated Member Functions to obtain the data from the hardware. This went fine and I created a Test vi for verfication utilizing a typical Event Structure architecture.
However, in other applications (without classes) I typically use the Producer/Consumer Design Pattern with Event Structure so that the main loop is not delayed by any hardware interaction. My queue data is a cluster of an "action" enum and a variant to pass data. Is it OK to use this pattern with classes? I created a vi and it works fine and attached is a png (of 1 case) of it.
Are there any problems doing it this way?
Jason

JTerosky wrote:
I'm starting a new project which involves acquiring data from various pieces of equipment using a GPIB port. I thought this would be a good time to start using Classes. I created a GPIB class which contains member data of: Address, Open State, Error; with member vis such as Set Address, Get Address, Open, Close...general actions that all GPIB devices need to do. I then created a child class for a specific instrument (Agilent N1912 Power Meter for this example) which inherits from the GPIB class but also adds member data such as Channel A power and Channel B power and the associated Member Functions to obtain the data from the hardware. This went fine and I created a Test vi for verfication utilizing a typical Event Structure architecture.
However, in other applications (without classes) I typically use the Producer/Consumer Design Pattern with Event Structure so that the main loop is not delayed by any hardware interaction. My queue data is a cluster of an "action" enum and a variant to pass data. Is it OK to use this pattern with classes? I created a vi and it works fine and attached is a png (of 1 case) of it.
Are there any problems doing it this way?
Including the error cluster as part of the private data is something I have never seen done and ... well I'll have to think about that one.
Ben
Ben Rayner
I am currently active on.. MainStream Preppers
Rayner's Ridge is under construction

ETL design pattern with Data Integrator

Hi all
I have searched a lot on the SAP website and also on the Google to find a reliable document about ETL design pattern which applies to BO Data Integrator, but it was not successful. Most of the links I found was for SSIS and Informatica,....
I would be grateful if you could guide me to a good link about ETL design pattern.
Thanks.

I would start with these two:
https://wiki.sdn.sap.com:443/wiki/display/BOBJ/ETLProjectGuidelines
https://wiki.sdn.sap.com:443/wiki/pages/viewpage.action?pageId=49414406

Factory Design Pattern with Java generics

I was wondering if it was possible to implement the factory pattern using a generic like sintax with java5. Something like:
IFactory factory = new ConcreteFactory();
Car c=factory.CreateObject<Car>();
I saw this article the other day http://weblogs.asp.net/pgielens/archive/2004/07/01/171183.aspx
done in C# for the framework 2.0 and tryed to re-implement it with java5 however I was less then fortunate, can someone do a functional conversion?

I had to change the signature a bit but this is the best I came with:
(I don't like I have to write Type.class but if someone has a better idea please share, I deliberatly used classes are return types but you can easily program to the interfaces as well)
use:
ConcreteFactory cf=new ConcreteFactory();
Car c=cf.Create(Car.class);
public interface Vehicle {
String getName();
public class Plane implements Vehicle {
String name="Mig 29";
public String getName() {
return name;
public class Car implements Vehicle {
String name="Volvo";
public String getName() {
return name;
public interface IFactory{
<T> T Create(Class<T> type);
public class ConcreteFactory implements IFactory {
public <T extends Vehicle> T Create(Class<T> type) {
try {
return type.newInstance();
} catch (InstantiationException e) {
return null;
} catch (IllegalAccessException e) {
return null;
}

A web service design issue with patterns

Hello,
I�d like to ask for your help in the following design issue:
I need to create an email sending web service (with Axis). Only just one method which returns with an integer return code. This handles the following:
- based on the given parameters gets the email addresses from an
LDAP server (with netscape ldap for java)
-     makes a cache from them (only after a timeout period will be the cache
refreshed) (don�t know what tool to use for this)
-     selects html templates which to be sent based on the given parameters
-     sends emails with the appropriate templates (with Velocity)
-     the whole process is logged (with log4j)
I have to write the code as generic as possible. I know that some design pattern should be used for this. (some from GoF , and I know there exists design patterns specially created for web services as well).
Could you enumerate me which patterns (and for what part of the program) would be the best choice to solve this problem? I have read through some books about patterns, but don�t have the knowledge to pick up the right one for a concrete problem like this..
Thank you in advance,
nagybaly

Hello,
I�d like to ask for your help in the following design
issue:
I need to create an email sending web service (with
Axis). Only just one method which returns with an
integer return code. This handles the following:Lots of responsibilities here. You would do well to break this up into several classes that you can test separately.
I would also advise that you not embed all this in a servlet. Make a service that collaborates with several objects to accomplish the task and let the serlvet just call it.
.> - based on the given parameters gets the email
addresses from an
LDAP server (with netscape ldap for java)I'd recommend Spring's LDAP module. Pretty terrific stuff.
cache from them (only after a timeout period will be
the cache
refreshed) (don�t know what tool to use for
this)Maybe EhCache or OsCache or something like that.
-     selects html templates which to be sent based on
the given parametersWhere does this come from? Certainly not the LDAP. A relational database? Write a DAO for the document template.
-     sends emails with the appropriate templates (with
Velocity)Have an e-mail sender service using Java Mail.
-     the whole process is logged (with log4j)Easily done.
I have to write the code as generic as possible. I
know that some design pattern should be used for
this. No pattern. There might be patterns, if you say that the DAOs to access the LDAP and RDB are patterns.
Stop thinking patterns and start thinking objects.
(some from GoF , and I know there exists design
patterns specially created for web services as
well).Nope.
Could you enumerate me which patterns (and for what
part of the program) would be the best choice to
solve this problem? I have read through some books
about patterns, but don�t have the knowledge to pick
up the right one for a concrete problem like this..
Thank you in advance,
nagybalyYou haven't read them because they aren't there. Your problem is pretty specific, even if it's common.
%

Software reuse with Java design patterns

Anyone have any suggestions on how software can be reused with Java design patterns? Any concrete examples?

Buy the GoF book. Lot's of examples there.

Design pattern for unprotecting and reprotecting sheets with VBA?

Many macros can't run when a worksheet is protected, so when I develop an Excel workbook that has protected worksheets, I have to unprotect worksheets when macros are called and then reprotect the worksheets once the macro has completed.
The current design pattern I use for this is the following:
I look at each procedure individually and consider which sheets need to be unprotected for it to run. Then in each procedure I write:
Sub Test()
Dim bSheet1Protected as boolean
Dim bSheet2Protected as boolean
bSheet1Protected = Sheet1.ProtectContents
bSheet2Protected = Sheet1.ProtectContents
bSheet1Protected.Unprotect
bSheet2Protected.Unprotect
'''The rest of my code
if bSheet1Protected then Sheet1.Protect
if bSheet2Protected then Sheet2.Protect
End Sub
But I imagine that maybe there are better ways of doing this. What is your preferred design pattern for unprotecting and reprotecting sheets with VBA?

Hi JP3O,
I think it is a good practice to unprotect the worksheet before execute some code and protect it back after the code execute finished.
>>But I imagine that maybe there are better ways of doing this. What is your preferred design pattern for unprotecting and reprotecting sheets with VBA?<<
I am not able to find a better way since we always need to unproect the worksheet if some code didn't not executed successful when the worksheet is proected.
Regards & Fei
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Designing a smart Swing GUI with design patterns

Hi !
I have to build a quite big Swing GUI from
scratch. I would like to use smart design patterns to :
* ensure reusability of some components
* offer a framework-like set of solid classes
to deal with generic problems
* try to respect MVC pattern as close as possible
from the real MVC spirit (not the half MVC
pattern Swing is build upon)
Could somebody give me any link towards ressources/docs/articles dealing with how
to build such a smart Swing GUI ?
Thanx a lot !

Hi !
I have to build a quite big Swing GUI from
scratch. I would like to use smart design patterns to :
* ensure reusability of some components
* offer a framework-like set of solid classes
to deal with generic problems
* try to respect MVC pattern as close as possible
from the real MVC spirit (not the half MVC
pattern Swing is build upon)
Could somebody give me any link towards ressources/docs/articles dealing with how
to build such a smart Swing GUI ?
Thanx a lot !

Possible design patterns for base function with possible additions

I have various interfaces i have to implement. Let's assume ITypeA, ITypeB. They have following methods:
ITypeA
Connect
Disconnect
GetData
SetData
ClearData
ITypeB
Connect
Disconnect
GetData
SetData
Start
Pause
Stop
They have some base functionality: Connect, Disconnect, GetData and SetData.
If I want to add ITypeC in the future, it will have these base functionality too.
I want to access to the base functionality and if there is additional functionality, I want to get this too. What design patterns are available that are capable of this situations?
I found one here: Extension Interface. In this, you create a base
interface and multiple extension interfaces that are implementing the additional functions. In the base interface you can ask for the available extension interfaces of the component. But this approach seems complicated: I have to create interfaces for each
type, factories for the interfaces, I need some tables to save what Interface belongs to what Factory...
What is the basic solution for this problem? Extension Interfaces? Are there any other possible alternatives for my problem?

You may have more joy dividing your interfaces by behaviour and deciding on the types later.
interface IConnectable
Connect
Disconnect
interface IDataTransferrable
GetData
SetData
interface IPlayable
Start
Pause
Stop
class TypeA : IConnectable, IDataTransferrable
class TypeB : IConnectable, IDataTransferrable, IPlayable
And then how can discover if your object supports these interfaces?
here's one way:
if (ob is IPlayable)
Playback(ob);
where you have a function:
void Playback(IPlayable ob)

Data Lista Handler Design Pattern and paging queries

I'm using Toplink in an MVC (Regular Beans, JSP and Struts) application. I'm not using ADF. At least not until i make up my mind on the features-portability tradeoff.
Anyway, my application will have to use queries to show the data to the user. This can easily be accomplished by putting the search parameters on my jsp and using ReadAllQuery to compose my query.
My problem is that the result can return a large amount of records and show all this records at once on the jsp might take a time the user won't be willing to wait. That's when paging the results will come handy.
In another application of mine i use paging manipulating the rownum of the query, but in that case, i had control of the whole sql statement. As this is the first time i'm working with Toplink, i'm feeling that can't be done.
There's the Data List Handler design pattern too, but that one also manipulates the sql statement.
I'm wondering now whether paging can be accomplished using Toplink..? Will i have to use ADF...? This kind of stuff.
Thanks a lot to all.
- Eduardo

Eduardo,
What you need to do is use Cursors in TopLink.Scrollable cursors enable you to scroll through a result set from the database without reading the whole result set in a single database read. The ScrollableCursor class implements the Java ListIterator interface to allow for direct and relative access within the stream. Scrollable cursors also enable you to scroll forward and backward through the stream.
Here is an example:
ReadAllQuery query = new ReadAllQuery();
query.setReferenceClass(Employee.class);
query.useScrollableCursor();
ScrollableCursor cursor = (ScrollableCursor) session.executeQuery(query);
while (cursor.hasNext()) {
System.out.println(cursor.next().toString());
cursor.close();
I hope this answers your question.
Deepak

SERVICE LOCATOR ?? Is it really an interesting Design pattern??

Hi everybody,
i've a problem with the J2EE Design Pattern "Services locator" (it's a singleton).
It is said that by making use of a Service Locator we can :
- hide to the client the complexities of initial context creation, EJB home object lookup,and EJB objectre-creation.
- multiple clients can reuse the Service Locator object to reduce code complexity, provide a single point of control, and improve performance by providing a caching facility.
But i would like to understand at which side should that service locator object reside??!!??
If it is at server side then the clients need well an initial context in order to make a lookup on that object.
Conclusion :
the service locator doesn't hide the complexities of initial context!!
Furthermore the client has to perform a look-up on that service locator object!! The only advantage left is caching facility.
If it is at client side, each client needs his own services locator object
Conclusion :
multiple client don't reuse the same service locator. What's the advantage to be a singleton ???
There is certainly something that i don't understand so help me please!! Thanks.

Hi Yves,
But i would like to understand at which side should
that service locator object reside??!!??
If it is at client side, each client needs his own
services locator object
Conclusion :
multiple client don't reuse the same service locator.
What's the advantage to be a singleton ???The service locator resides on the client side and is implemented as
a singleton. Since it is possible that there could be multiple
class loaders/JVMs on the client side, and therefore, multiple
instances of the "singleton" service locator. This is typical
in a distributed environment (e.g. servlets/JSPs in a web-tier
cluster using service locator). Thus service locator is not
a truly "distributed singleton" object. But, the empahsis
is to design the service locator such that it does not hold
any state that needs to be replicated across multiple
instances across different JVMs as mentioned. Thus, there
is no need for multiple clients to use the "same" service locator,
but still the benefits of implementing this pattern is realized.
By making it a singleton, and keeping it from holding state
that needs to be replicated, we realize the benefits of this pattern.
You may also want to visit the J2EE Pattern interest list
and see these relevant discussions :
Topic: Service Locator and passivation
http://archives.java.sun.com/cgi-bin/wa?A2=ind0106&L=j2eepatterns-interest&F=&S=&P=1026
Topic: Caching EJBHome interfaces
http://archives.java.sun.com/cgi-bin/wa?A2=ind0106&L=j2eepatterns-interest&F=&S=&P=9226
Topic: Using Service Locator for Data Source caching
http://archives.java.sun.com/cgi-bin/wa?A1=ind0106&L=j2eepatterns-interest#31
hope this helps,
thanks,
-deepak

What is the best design pattern for this problem?

No code to go with the question. I am trying to settle on the best design pattern for the problem before I code. I want to use an Object Oriented approach.
I have included a basic UML diagram of what I was thinking so far.
Stated simply, I have three devices; Module, Wired Modem, and Wireless Modem.
In the Device Under Test parent class, I have put the attributes that are variable from device to device, but common to all of them.
In the child classes, I have put the attributes that are not variable to each copy of that device. The attributes are common across device types. I was planning to use controls in the class definition that have the data set to a default value, since it doesn't change for each serial number of that device. For example, a Module will always have a Device Type ID of 1. These values are used to query the database.
An example query would be [DHR].[GetDeviceActiveVersions] '39288', 1, '4/26/2012 12:18:52 PM'
The '1' is the device type ID, the 39288 is the serial number, and the return would be "A000" or "S002", for example.
So, I would be pulling the Serial Number and Device Type ID from the Device Under Test parent and child, and passing them to the Database using a SQL string stored in the control of the Active Versions child class of Database.
The overall idea is that the same data is used to send multiple queries to the database and receiving back various data that I then evaluate for pass of fail, and for date order.
What I can't settle on is the approach. Should it be a Strategy pattern, A Chain of Command pattern, a Decorator pattern or something else.
Ideas?

elrathia wrote:
Hi Ben,
I haven't much idea of how override works and when you would use it and why. I'm the newest of the new here.
Good. At least you will not be smaking with a OPPer dOOPer hammer if I make some gramatical mistake.
You may want to look at this thread in the BreakPoint where i trie to help Cory get a handle on Dynamic Dispatching with an example of two classes that inherit from a common parent and invoke Over-ride VIs to do the same thing but with wildly varying results.
The example uses a Class of "Numeric" and a sibling class "Text" and the both implement an Add method.
It is dirt simple and Cory did a decent job of explaining it.
It just be the motivation you are looking for.
have fun!
Ben
Ben Rayner
I am currently active on.. MainStream Preppers
Rayner's Ridge is under construction

Does any body have any design patterns of JSF Web Application Developping?

Can any one answer me some questions?
#1.I am an amatuar of people who develop Web Application.For some reason,We choose the JSF to develop our item.through some introduction,I know the UI component of JSF is resided in Server side,is it right?but I am a little confused that:if there are many users who are exploring our jsf website.(to simplify my question,image I had just one web page and just one button)How many UI components(buttons) will be there?How it(they?) works?
#2.Does any body have the success experience (for example design pattern)to develop web applications?if We just concern about the Add,Delete,Modify,Query operations of some data.
I just do my job according to my feeling.
I will give every page a pagebean(backing bean),and I am not sure how to combine the business data with the pagebean.some one suggested that I should use delegate pattern to separate my business log and page logic.But I am still confused by following things:
#2.1 does JSF have the same ability to help us construct the model dialog just like swing to
help us control the operation flow?
#2.2 If there is not,Does the following way work?I put every tabledata's property as corresponed component.if user choosed the row in the table,My Listener will syncronize the row data to the components.But
#2.2.1 if JSF has the components according to the web users' number,how can My Listener tell which component should be update?Should I maintain the map?
#2.2.2 If the problem I imaged above is false,Does any body can tell me how to custom the ListDataModel,so I can use it like Swing?because now I can just use some view data to insert into ListDataModel,but after some selection operation,my business object must be find according to the selected data,it is not an interesting job!
I am waiting for your advice!

Ok I'll try to explain Step by step please correct me if I make any mistake because I have not played much with shared variables.
To create a shared variable to an RT target go to the target if tou have already otherwise add an RT target by right clicking the Project>>Add targets and Devices
Then in the target Right clikc and select the variable as shown below.
Then once the Shared variable settings window opens Enter a variable name and then Select the type "Network Published"
In the right side you can select the data type for the shared variable and even you can choose your custome controls.
After selecting the data type go for the Network and select buffering if required else leave it if you are planning to use the variable just for display purpose.
Then you can enable the RT FIFO if required (Not able to explain how it works and why it is used).
Then after completing the Shared variable setup you can access the variable in the VI in both the Host and the RT.
You can bind the variable to a control so that if any data from the RT is coming you can read the data from that control.
Once you have placed your shared variable in the BD you can change the access typr to read or write depending on your need.
This might not explain the complete shared variable concept but I believe that this would defenelty give you a kick off to start using the shared variable. Please correct or add more comments if anybody know better.
Good luck.
The best solution is the one you find it by yourself

Design patterns for updating a fact table

I have a fact table and about 10 dimensions.
One of these dimensions can be missing values, so the fact table row will link to an UNKNOWN value.
When the correct value is finally entered in the dimension table i want to update any associated fact rows.
Whats the most efficient way of doing this?

I know i have to use a lookup transformation ;-)
I wouldnt be at teh stage of even having a fact table if i didnt know that! I was looking for a design pattern, not the name of a shape!
The solution i went with was to take a hard line on any rows with unknown values. If when importing the data there are unknown values for two of the most important dimensions, those rows are not inserted into the fact table, but instead pushed to an ErrorLog
table.
Users run a report that shows what this table contains and if they really want those rows, they insert the correct dimension values and rerun the import, which will only import any rows not already in the fact table.
This way:
1. all sorting & filtering issues are resolved as there will be no unknown rows for the most important dimensions used in sorting and filtering.
2. we can quickly see any rows with unknown values and figure out whats wrong. its always missing reference data that the client didnt think to give us. a quick insert of the dimension data and import and the rows get imported.
thanks for the replies.

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

Localization design patterns with TopLink

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