When should use Declarative components?

What's the Declarative components and when should use them?

Frank,
According to the sentiment I get on this Forum sometimes, I thought ADF was supposed to automatically infuse into your brain while the JDeveloper installer ran - who needs documentation?
In all seriousness, however, The Fusion Developer's Guide is sitting right here on my desktop, and is open more often than not. I think it suffers from the "free is worthless" syndrome - it's got a lot of good information in it, and if it was a published physical book, I'd bet that people would pay for it.
John

Similar Messages

When should use request scope

hi
i don't know when i should use request scope, the example is use session scope always.
Can anyone help me?
thanks!

SpiderFromMars wrote:
> What are the best practices for using the variables
scope versus using the
> request scope when assigning variables.
>
> In other words, when should I use <cfset variables.x
= 'barf'> and when
> should I use <cfset request.x = 'barf'>?
>
The variables scope is only accessible in the current
template. The
request scope is accessible in the current template and any
other
template, such as a custom tag or include file, that is used
to build
the current request.
I.E

<cfset variable.x = "foo">
<cfset request.x = "bar">
<cfoutput>#variable.x##request.x#</cfoutput>
<cf_myCustomTag>

<cfset variable.x = "bob">
<cfoutput>#variable.x##request.x#</cfoutput>

When should use ACCESS?

Hi all,
I have written a java program to load some data (text file) into ACCESS database. It is fine for testing. Once I put it into my real data (about 1.3 MB), it doesn't work. After I check with my tables, some data is missing. I really don't know why. I can't see any exception error messages.
Then, I suspected that is the problem of ACCESS, therefore, I turned autoCommit into false, and commited it finally, but it still doesn't work. So, are there any techniques can help?
Actually, can anybody give me some suggestions, how large the data should be stored in ACCESS. When should us give up ACCESS.

I think it is better for me to answer my question, so
that it is helpful fo other programmers who have
encountered same problem.
This problem doesn't come from wrong codes, but for
reliability of ACCESS, at least I suspect. In my case,
although I have only one mega data for loading, this
data involved a lot of relationship (a lot of tables).
Therefore, It is not sufficient to just mention how
large you raw data is. If your raw data will generate
multiple relationships, it will be another story.
My solution is, setting autocommit to false, and comit
it for each 10 objects(which involved several insert
statements for several tables). It is functionable. I
think that ACCESS is just for development and testing.
But, I have a question, who know the max capacity of
ACCESS in term of MB?
Still don't know what you are talking about. The usage I saw for MS Access was for financial transactions for banking purposes. I know that it has also been used for medical records. And it has been used extensively for small retail.
And to my mind that means it is not just "for developement and testing."
And if you think Oracle and MS SQL Server can't end up with corrupted databases, then you might want to do some research into that. I know that they can. And there is certainly no reason to believe that other databases are perfect in that regard.
Most of the cases that I am familar with where there are problems with corrupt data in MS Access it can be usually be traced to poor user practices. Such as hitting the power down button instead of using shutdown. And that would undoubtly cause problems with Oracle and MS SQL Server as well, but you don't see that as much because admins deal with servers and their training usually includes enough info so that they know not to do that.

Wait button Error message coming :: when we use Cross components

I am using 2 different components ie., component1 & component2, Lets suppose i have 2 links in component1.
If i click 1st link then i am displaying PDF using INTERACTIVE FORM UI element which was uploaded through MIME repository,
next , if i click 2nd link to call component2 , it displays properly.
if i click again on 1st link which is again component1 called back again PDF displays but Wait status message was coming ( rotating wait symbol ) disabling all other options.
Can anyone kindly suggest how to stop this wait status mesage error without delay

Hi.,
That Wait Status depends on server response and code..,
The wait Status should be there with all other disabling ., else if u click one link the process is going on and immediately if u click another link then controller has to perform that execution., In order to prevent that Wait Status has to be there to go to other event only the first event is executed..
And u can minimize the delay by speed up the server and your code performance.,
hope this helps u.,
Thanks & Regards,
Kiran

When should a subclass have its own fields and when should it use its super

When should a subclass have its own fields and when should it use its superclass' fields?
Hi, thank you for reading this post!
Let me use a specific example to ask my question.
public class BankAccount {
     private double accountBalance;
     public double getBalance() {
          return this.accountBalance;
public class SavingsAccount extends BankAccount {
     private double accountBalance;
     public double getBalance() {
          return this.accountBalance;
}In the bank account example, both BankAccount and SavingsAccount will have a method getBalance(). Therefore, they
both require a account balance field. My question is since getBalance() for both classes will perform the exact same
operation, when should I omit declaring the getBalance() method and the accountBalance field in the subclass, and
when should I include them?
My own thought is when we never have to instantiate a superclass object (e.g. an abstract class), then we place
common fields in the abstract superclass and have subclasses access these fields via protected getter/setters to
access the superclass' fields. This is the principle of reuse.
But when you do need to instantiate a superclass and the superclass does need to maintain its own fields, then
I would need to duplicate the accountBalance field and getBalance() method in the subclass.
Is my thinking correct or incorrect?
Thank you in advance for your help!
Eric
Edited by: er**** on 22-Aug-2011 20:19

er**** wrote:
If SavingsAccount inherit BankAccount.getBalance()...getBalance() would return BankAccount's accountBalance. This is NOT the correct result we want.Actually, I think it's precisely what you want.
We want getBalance() to return BankAccount's accountBalance when we use a BankAccount object, and SavingsAccount's accountBalance when we use a SavingsAccount object.I seriously doubt that. I think you're confusing a BankAccount with a Customer, who can have more than one account.
In every system I've ever seen, a SavingsAccount IS-A BankAccount - that is to say, it's a genuine subtype. Now, it may well contain other fields ('interest'?) that a normal account wouldn't, but 'balance' ain't one of them.
Winston

I recently bought an ipad 2 and wanted to use all the apps on my iphone4 on my ipad but have been charged when I use my apple id. What should I have done to share the apps?

I recently bought an ipad 2 and wanted to use all the apps on my iphone4 on my ipad but have been charged for the first app I downloaded when I use the same apple id. What should I have done to share the apps and should I have been charged? 2 months ago when I got a new iphone, i was told in order to get all my apps back as I hadn't backed up my files, if I used the same apple id I would 'purchase' the app, but then would not be charged as apple would recognise that I have already purchased the app. That worked, but when I did the same thing on my ipad 2 using the same apple Id, I was charged... what should I have done and is this right as I thought the whole point of having multiple apple devices was I could share apps between devices. please help! thanks.

Using the same Apple id and Password you should be able to download purchased apps without being charged again.
I download to an iPad/iPad2/iPhone3 & iPhone4 with no problem.

Please help me!!!! my macbook pro 15 running on mountain lion is hanging a lot...sometimes when i use any app than it get freeze for some seconds...what should i do?

please help me!!!! my macbook pro 15 running on mountain lion is hanging a lot...sometimes when i use any app than it get freeze for some seconds...what should i do?

Hardware Information:
          MacBook Pro - model: MacBookPro8,2
          1 2.2 GHz Intel Core i7 CPU: 4 cores
          4 GB RAM
System Software:
          OS X 10.8.2 (12C60) - Uptime: 0 days 1:17
Disk Information:
          TOSHIBA MK5065GSXF disk0 : (500.11 GB)
                    disk0s1 (disk0s1) <not mounted>: 209.7 MB
                    Macintosh HD (disk0s2) /: 499.25 GB (424.92 GB free)
                    Recovery HD (disk0s3) <not mounted>: 650 MB
          HL-DT-ST DVDRW GS31N
USB Information:
          Apple Inc. BRCM2070 Hub
                    Apple Inc. Bluetooth USB Host Controller
          Apple Inc. Apple Internal Keyboard / Trackpad
          Apple Inc. FaceTime HD Camera (Built-in)
          Apple Computer, Inc. IR Receiver
FireWire Information:
Kernel Extensions:
Problem System Launch Daemons:
                 [failed] com.apple.coresymbolicationd.plist
Problem System Launch Agents:
                 [failed] com.apple.afpstat.plist
                 [failed] com.apple.AirPlayUIAgent.plist
                 [failed] com.apple.coreservices.appleid.authentication.plist
                 [failed] com.apple.rcd.plist
Launch Daemons:
                 [loaded] com.adobe.fpsaud.plist
                 [loaded] com.adobe.SwitchBoard.plist
                 [loaded] com.google.keystone.daemon.plist
                 [loaded] com.microsoft.office.licensing.helper.plist
Launch Agents:
                 [loaded] com.adobe.CS5ServiceManager.plist
                 [loaded] com.google.keystone.agent.plist
User Launch Agents:
                 [loaded] com.adobe.ARM.202f4087f2bbde52e3ac2df389f53a4f123223c9cc56a8fd83a6f7ae.plist
                 [loaded] com.facebook.videochat.Akshay.plist
                 [loaded] com.microsoft.LaunchAgent.SyncServicesAgent.plist
User Login Items:
          Sony Ericsson Bridge Helper
          BitTorrent
          uTorrent
3rd Party Preference Panes:
          Flash Player
          Java
Internet Plug-ins:
          AdobePDFViewer.plugin
          AdobePDFViewerNPAPI.plugin
          Flash Player.plugin
          FlashPlayer-10.6.plugin
          googletalkbrowserplugin.plugin
          JavaAppletPlugin.plugin
          npgtpo3dautoplugin.plugin
          QuickTime Plugin.plugin
          SharePointBrowserPlugin.plugin
User Internet Plug-ins:
          Google Earth Web Plug-in.plugin
          Picasa.plugin
Bad Fonts:
          None
Top Processes:
          14.6 %          WindowServer
          6.9   %          coreaudiod
          6.4   %          uTorrent
          1.9   %          WebProcess
          1.4   %          iTunes
          1.2   %          EtreCheck
          0.5   %          fontd
          0.2   %          NotificationCenter
          0.1   %          Dock
          0.0   %          Microsoft

Is there any way to turn off airport without removing the electrical plug and should I unplug it when not using it??

I just got the 5G Airport Extreme base station. Set-up was a snap! Maybe 10-15 minutes compared to a friend who got another name brand for his pc and took a couple hours, even having to call customer support! Been working great so far, but am concerned about never turning it off, not only about the possibe harm that could be done to the unit, but also about having an active, open Internet connection 24/7. Before I got my Airport Extreme I was using Ethernet cable with a cable modem that could be placed on "standby" whenever I was not using my Mac for Internet, but since AE5G doesn't have a power switch on the unit, have left it turned on rather than unplugging it by the electrical cord. I did turn AirPort "off" in the menu bar when not using it wth my Mac, but AE is still apparently constantly active, showing a steady green light. Would there be any harm done by plugging it in only when I want to use Wi-Fi, then unplugging it?
Thanks for the help!

Would there be any harm done by plugging it in only when I want to use Wi-Fi, then unplugging it?
That is a matter of debate, since there are two schools of thought regarding power status on a router.
One school maintains that you can turn the device on and off as needed. Makes sense for some folks. The advantage of this is that it might save a bit of electricity, although the Extreme draws very little power most of the time.
Another school believes that there is a reason why Apple did not even place an "Off" switch on the device. It's designed to run 24/7.
Leaving the Extreme on will place far less stress on the electrical components in the device since they stay in an "idle" state most of the time, drawing very little current. Powering any electrical device up sends a sudden rush of current through the device, which places far more stress on a device than if it is simply left on.
It depends on your priorities. If you want to save electricity, your decision is already made. If you intend to prolong the life of the router, then consider leaving it on, as Apple intended.
A compromise position might be to leave the Extreme on most of the time and power if off for long weekends or vacation periods when you will be away. Remember that the Extreme must establish all new network connections every time that it powers back up....perhaps another reason to simply leave it on.

I tried to export photos from iMac to iPad using a USB flash drive. The photos are on the drive but when I plug it into the iPad, the iPad says the device requires too much power. Any ideas of what type of USB flash drive I should use?

I tried to export photos from iMac to iPad using a USB flash drive. The photos are on the drive but when I plug it into the iPad, the iPad says the device requires too much power. Any ideas of what type of USB flash drive I should use?

You can transfer photos outside of iTunes. I do it all the time. THat said, i have a 50/50 success rate with them. I'd avoid sandisk and kingston, their bundled software triggers the 'too much power' warning.
I've had mixed luck with lexar, some work, some don't.
I did have good luck with an older 4 gig geek squad one.
Look for drives without software on them, without bright LED lights and I haven't gotten any larger than 4 gig to work, but that may just be me.
For a less troublesome way? h onestly, I use a SD card that I've formatted with the DCIM folder. I've never had one of them trigger the 'too much power' warning. Just make sure they're not SDXC. those don't work.

When we should use F-54 clear down payment

Hi,
When should I use T-code F-54 clear down payment? Is this necessary to perform this step?
1. F-47 down payment request
2. F-48 post down payment
3. MIGO post good receipt of PO
4. MIRO post vendor invoice
5. F-58 payment by check (for outstanding balance)
Any advice are welcome.
Thanks,
Wendy

Dear Wendy,
usually the steps to perform, when You're using DP, are the following ones:
1. F-47 Down payment request
2. F110 Down payment
3. FB60 Invoice
4. F-54 Down payment Clearing
By F-54 that is the downpayment clearing, the System will close the
first line item of the downpaymewnt with PK 29A
by the first line item of downpaymewnt clearing with PK 39A;
and it opens a new vendor line item by the posting key 26.
This means that from the financial point of view the system transforms
the original downpaymen into a partial payment.
Therefore the downpayment clearing has an economic value.
It changes the Down payment (that is posted using a special G/L
indicator) into a partial payment (that does not have any special
G/L indicator).
I hope this can help You.
Mauri

When should I use static variable and when should not? Java essential

When should I use static variable and when should not? Java essential

Static => same value for all instances of the class.
Non-static => each instance can have its own value.
Which you need in which circumstances is completely up to you.

Characters show up as boxes when using AWT components.

Having installed on a Windows XP english OS the asian languages packs (with fonts included, from Microsoft) and knowing that with MS Gothic, Gulim and Simsun you can display japanese, korean and chinese characters it seems that on JRE 1.5 and up this is not possible (boxes appear instead) on any applet.
How to reproduce:
Label l2 = new Label("Japanese chars: \u8457\u4f5c\u6a29");
Workaround:
Step 1. Rename ..\jre\lib\fontconfig.properties.src to ……\fontconfig.properties
Step 2. Modify the following line:
sequence.allfonts=alphabetic/default,dingbats,symbol
to
sequence.allfonts=alphabetic/default,dingbats,symbol,japanese,chinese-ms936,chinese-ms950,korean
How is this possible? On JRE 1.4 this was working. Also another fix is to use Swing components instead but this is not realistic for a big project.
Any help will be greatly apprecied.

The problem is related to the JRE v. 1.5.0_11 or greater. In JRE 1.4.2_13 for each language there was a configuration file that Java was using to determine which fonts to use for different categories of objects.
The problem is encountered only for AWT components.
Starting with JRE 1.5 (http://java.sun.com/j2se/1.5.0/docs/guide/intl/fontconfig.html) there is only one configuration file (fontconfig.properties.src) for all the languages. Since the character subsets supported by given fonts often overlap, in the file separate search sequence properties are used to define in which order to try the fonts when rendering a character. In the default version of the file this properties do not specify also the asian languages.
We have to do the following things:
*1.* You must first install into Windows the support for asian languages: Control Panel - > Regional and Language Options
� On the Advanced tab add the conversion tables for all Asian languages (this action may not be required).
� On the Languages tab check �Install files for East Asian Languages (this action is required)
Restart the computer.
*2.* Assure you have the needed asian fonts : batang(fopr korean), simsun, gulim, mingliu, msgothic(for japanese) installed.
*3.* Rename ...\jre\lib\fontconfig.properties.src to ��\jre\lib\fontconfig.properties. By doing this the fontconfig.properties file will be used by the JRE as the default configuration file.
*4.* Modify the following line:
sequence.allfonts=alphabetic/default,dingbats,symbol
to
sequence.allfonts=alphabetic/default,dingbats,symbol,japanese,chinese-ms936,chinese-ms950,korean
*5.* Assure that in the file the logical to physic font binding, binds to existing fonts.
Obs: If step 1 is skipped the titles of the windows will still have boxes.
Hope it helps.
Donoiu Cristian

What is the necessity of the AC power cord (with Mac Book Air)? When should it be used with the power adapter?

what is the necessity of the AC power cord (with the Mac book Air)? when should it be used?

Gary, you wouldn't believe some of the questions people ask on this site.
Why are both cords necessary?
They are not.
Other than the two reasons dominic23 sited are there any other reasons to use the AC power cord rather than the power adapter cord alone?
No.

What is a Transient Variable and when should it be used

Hello everyone,
I just want to know the details regarding the transient variable and when should we use it. what is the significance of this variable?

Transient variables are not written out when the class is serialized.
http://java.sun.com/docs/books/tutorial/essential/io/providing.html

J1INCHLN when should I use error control mode checkbox

Hi Experts,
I am using t-code J1INCHLN for creating remittance Challan.
But in ECC6, EHP 5 there is new functionality added & no documentation available for same.
There is one field with tick option called Error Control Mode.so when should i use this functionality.
Can anyone help on this?
Thanks and Regards,
Sameer

HI
Please refer the note no : 1567443
Manual Control in J1INCHLN to change currency key/doc type
"After this, if you will run J1INCHLN, you will get a checkbox at the end
with 'Error Control Mode' which will be selected by default. If you want
to change document type, currency or rate during processing, you should
uncheck it else it will take you to the last screen."
I hope note is allready available in your system hence you are getting above cheeck box.
If you want to change the document type and currency or rate during posting then you need use the check box.
Regards
Madhu M

When should use Declarative components?

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