Unnecessary narrowing

Hello,
I [more than once] stumbled accross code such as:
Object homeRef = namingcontext.lookup("some.jndi.path.for.XxxHome");
XxxHome xHome = (XxxHome)javax.rmi.PortableRemoteObject.narrow(homeRef, XxxHome.class);
Xxx remoteRef = (Xxx)javax.rmi.PortableRemoteObject.narrow(xHome.create(), Xxx.class);The second cast and narrowing seem unnecessary to me. I think it's an overlooking from the developper's part which switched from Java to J2EE recently.
But as I am recent myself to J2EE, I have still a doubt : is there any reason why one would want to do this?

jduprez,
Both casting and narrowing are necessary... coz of the following points,
1. When u narrow a home object it is enabling the object to function under the Distributed environment.. not acutally down casting the object... the down casting happens by the standard java casting code that we usally write.
In fact i have noticed in Weblogic 8.1 that u can downcast the home object and start using it with out running the object through the narrow method. What weblogic does does in this case is i GUESS is it switches off the distributed functionality of the object.
This Concept is clearly explained in the book Mastering Enterprise Java Beans Edit II by Ed Roman. In the Corba Appendix chapter u may want to read it to totally understand why one has to run the home object through narrow method and as well as down cast.
Hope i could clear you curiousity.
Cheers,
Max

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there ARE filters on this view. I'd rather not increase the throttle limit.
Anthony Kelly

Hi Ajk,
Check that the list is not scoped by an audience; but, I'm afraid that either way admin, (e.g. non Farm admin or site collection admin)
I'd recommend exporting to excel, create two new spreadsheets and then import as custom lists.
Best of luck and cheers,
Stacy Anothersharepointblog.blogspot.com

Keyboard does not connect - have narrowed to a software issue as it works in safe mode, but do not know how to resolve the software issue

I was in the process of connecting a Razer Blackwidow USB keyboard to my iMAC and something went wrong.
The new keyboard doe not respond and now my bluetooth keyboard does not work either. No connectivity whatsoever.
I've tried a number of things, including resetting the PRAM / NVRAM and SMC (interesting that the computer responds to the keyboard commands that are required to reset the PRAM). I also checked all the universal access setting to make sure nothing was interfering with normal keyboard operation.
btw, blutooth seems to think the keyboard is connected I get a gree light. I can even go through the process of unpairing and pairing and it allows me to type in the numberical code to pair the keyboard, but after that, it still does not work.
When I start the machine in safe mode, the keyboard works fine. So I've narrowed this down to a software problem. I tried to go to another user account to see if it's just associated with the current user, but since I have no keyboard connection at all, I can't type in a password, so that's no good.
I've eliminated a number of applications that I have recently installed (including the Razer set up app) that might interfere with keyboard operation, but no luck.
Any suggestions on how to go about tracking down this software issue?
Thanks - musikman7

Please read this whole message before doing anything.
This procedure is a diagnostic test. It won’t solve your problem. Don’t be disappointed when you find that nothing has changed after you complete it.
Third-party system modifications are a common cause of usability problems. By a “system modification,” I mean software that affects the operation of other software — potentially for the worse. The following procedure will help identify which such modifications you've installed. Don’t be alarmed by the complexity of these instructions — they’re easy to carry out and won’t change anything on your Mac.
These steps are to be taken while booted in “normal” mode, not in safe mode. If you’re now running in safe mode, reboot as usual before continuing.
Below are instructions to enter some UNIX shell commands. The commands are harmless, but they must be entered exactly as given in order to work. If you have doubts about the safety of the procedure suggested here, search this site for other discussions in which it’s been followed without any report of ill effects.
Some of the commands will line-wrap or scroll in your browser, but each one is really just a single line, all of which must be selected. You can accomplish this easily by triple-clicking anywhere in the line. The whole line will highlight, and you can then either copy or drag it. The headings “Step 1” and so on are not part of the commands.
Note: If you have more than one user account, Step 2 must be taken as an administrator. Ordinarily that would be the user created automatically when you booted the system for the first time. The other steps should be taken as the user who has the problem, if different. Most personal Macs have only one user, and in that case this paragraph doesn’t apply.
Launch the Terminal application in any of the following ways:
☞ Enter the first few letters of its name into a Spotlight search. Select it in the results (it should be at the top.)
☞ In the Finder, select Go ▹ Utilities from the menu bar, or press the key combination shift-command-U. The application is in the folder that opens.
☞ If you’re running Mac OS X 10.7 or later, open LaunchPad. Click Utilities, then Terminal in the page that opens.
When you launch Terminal, a text window will open with a line already in it, ending either in a dollar sign (“$”) or a percent sign (“%”). If you get the percent sign, enter “sh” (without the quotes) and press return. You should then get a new line ending in a dollar sign.
Step 1
Copy or drag — do not type — the line below into the Terminal window, then press return:
kextstat -kl | awk '!/com\.apple/{printf "%s %s\n", $6, $7}'
Post the lines of output (if any) that appear below what you just entered (the text, please, not a screenshot.)
Step 2
Repeat with this line:
sudo launchctl list | sed 1d | awk '!/0x|com\.(apple|openssh|vix)|edu\.mit|org\.(amavis|apache|cups|isc|ntp|postfix|x)/{print $3}'
This time, you'll be prompted for your login password, which won't be displayed when you type it. You may get a one-time warning not to screw up. You don't need to post the warning.
Note: If you don’t have a login password, you’ll need to set one before taking this step. If that’s not possible, skip to the next step.
Step 3
launchctl list | sed 1d | awk '!/0x|com\.apple|edu\.mit|org\.(x|openbsd)/{print $3}'
Step 4
ls -1A /e*/mach* {,/}L*/{Ad,Compon,Ex,Fram,In,Keyb,La,Mail/Bu,P*P,Priv,Qu,Scripti,Servi,Spo,Sta}* L*/Fonts 2> /dev/null
Important: If you synchronize with a MobileMe account, your me.com email address may appear in the output of the above command. If so, anonymize it before posting.
Step 5
osascript -e 'tell application "System Events" to get name of every login item' 2> /dev/null
Remember, steps 1-5 are all drag-and-drop or copy-and-paste, whichever you prefer — no typing, except your password. Also remember to post the output.
You can then quit Terminal.

How important it is to understand Concept of Narrow & Wide casting in ABAP Objects

Hi Friends,
I Understood that, it is very important to understand the concept of "Casting ( Narrow Casting & Wide Casting )" properly.
Let us see the following cases where the concept of "Casting ( Narrow Casting & Wide Casting )" comes into the picture in various practices of Abap, Webdynpro abap and FPM.
1. ABAP:-
When we are working with RTTS in abap it is very much important we must know the Casting Techniques. Without knowledge of the Casting of objects, there will be a lot of trouble we may faces.
Mainly RTTS offers Runtime Type Services, means RTTS Programming enables us to find the type of the particular data obejct or data type or data reference in the run time.
RTTS also enables us to create the data in the run time very dynamically.
So, in the run time when we finding the type of the data objects or creation of data objects in the run time, We must do the Wide casting and Narrow casting also some times on the references provided by SAP Dynamically.
So, here we go to have knowledge on Casting is mandatory.
2. WEBDYNPRO ABAP:-
The another point where the concept of casting comes into picture is , When we working with the ALV Reports and Dynamic programming of WEBDYNPRO. Here also we should posses good casting skills.
3. FPM:-
The major use of casting comes in hand is none other than FPM. When we working with certain Floor Plans or when we woking with Feeder Class concept of FPM, Casting comes into picture again.
Along with Casting ( Narrow casting & Wide casting ), We must have the knowledge of 'Field Symbols' and 'Data References (known & Unknown)' to work with our all complex scenarios of Webdynpro and FPM and all.
So guys, please have Knowledge on the following, befor you master on advanced techniques of WEBDYNPRO and FPM etc.
     1. Field Symbols
     2. Data References (known & unknown)
     3. Casting (Narrow casting & Wide casting)
     4. Brief Idea about RTTS
All the above 4 concepts will definitely make our life easy when dig more into WEBDYNPRO ABAP and FPM.
Thank You.
Please share your comments on the same.

Hi Shankar,
It's really good to know.
It could be great if you can share few technicalities for the concepts explained.
Regards,
Rafi

Unnecessary narrowing

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