Background Jar Loading

I have an applet which starts up without having loaded all the jar files. While the user is logging in I would like to download the rest of the jars in the background without a dialog entitled "Java Extension Installation" appearing to show the progress of the jar file download. How can I do this?
Thanks,
EK

You can't. Welcome to java.

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Dynamic Jar Loading Issues

Background: I'm writing a program that downloads modules (jars) from a server.
MainProgram contains the following interface
public interface Action{
public void go();
}The main program gets appropriate class names from a database and loads them using JarClassLoader (found at http://www.javaworld.com/javaworld/javatips/jw-javatip70.html). It then instantiates and runs the go() method on each class. This works great, but...
If I'm within one of these "loaded" classes and I want to use another "loaded" class I can't. If I just do a "new Foo()" it compiles, but I get a "NoClassDefFoundError". If I load the class out of the jar file with JarClassLoader (which worked to load the class I'm currently running in) it works until I try to cast it, then I get the same error. I'm wondering if the loaded classes aren't in the classpath, so I can't use them unless they extend a class that's in the classpath. In this link, http://forum.java.sun.com/thread.jspa?threadID=5117586&tstart=0 , there's talk of adding classes to the classpath at runtime. I even found an interesting example: http://marc.theaimsgroup.com/?l=ant-dev&m=115809243322706&w=2 , but someone mentioned that the addUrl method being used is not public and might change in later versions.
Questions: If I use the addUrl method, will I be kicking myself later? ('cause I kick hard) Or is there a better way to do this that I'm missing? (this second option seems to occur a lot)

Well I FINALLY got the URLClassLoader's addURL method to work and the JavaDoc says it's protected it, so if they change it in the future they will seriously anger anyone who overrode this method. Thanks anyway!

Adobe Media Encoder for AE export creates unwanted black background on load in white background

Hi. I have a seamless white website design. I added a white background to my AE file and also exported to Adobe Media Encoder with a white background, but I'm still getting a flash of black when the video loads. I have read discussions of this being a "bug" of the media encoder, but curious if anyone found a workaround. It's distracting to have the back load to black and then change to white, so I appreciate any recommendations. For now, my only idea it to re-record the video after the black flash, using a screen capture app, but this seems tedious and does not produce optimum results. Am I missing something?

Thanks for your reply!
I tried using Quicktime with PNG and it created a big file (1.18GB for a 1 minute long clip) that doesn't play back nicely in PPro unfortunately. But I then tried rendering the clip using a lossy format, H.264, in AE and it's playing back ok in PPro! I will just do that for the rest of the clips and hope that this is finally resolved. Many thanks for the tip!
Out of curisoty, do you know what might be causing the problem when I use Media Encoder?

Black background in Load Planning in TM9.1 with VB2.1(Also item details)

Hi Experts,
In Load Planning tab in Freight order, the 3-D component's background is always black, and when i clicking the item, item details will pop-up,
but the background also black, please see below picture.
Does anyone has ideas, Thanks in advance.
Best Regards,
Matthew He

Hi Uwe,
I have a similar problem.
I copied the demo program VBI_GUI_SAMPLE1 and have changed the source for displaying Details and Tooltip.
But the Details are shown in a black box. The letters are also in black, so the details are not visible.
--source
" tooltip
     ls_descr_entry-category   = if_vbi_const=>gc_descr_category-both.
     ls_descr_entry-part       = if_vbi_const=>gc_descr_part-caption.
     ls_descr_entry-field_name = 'RD'.                       "#EC NOTEXT
     ls_descr_entry-value      = |{ is_geo_position-xpos }/{ is_geo_position-ypos }|.
*    ls_descr_entry-column     = 1.
     APPEND ls_descr_entry TO ls_spot-description.
     ls_descr_entry-category   = if_vbi_const=>gc_descr_category-tooltip.
     ls_descr_entry-part       = if_vbi_const=>gc_descr_part-subcaption.
     ls_descr_entry-field_name = 'WGS84'.                    "#EC NOTEXT
     ls_descr_entry-value      = |{ ls_spot-position-xpos }/{ ls_spot-position-ypos }|.
*    ls_descr_entry-column     = 1.
     APPEND ls_descr_entry TO ls_spot-description.
     ls_descr_entry-category   = if_vbi_const=>gc_descr_category-detail.
     ls_descr_entry-part       = if_vbi_const=>gc_descr_part-body.
     ls_descr_entry-field_name = 'body'.                     "#EC NOTEXT
     ls_descr_entry-value      = 'detail'.
*    ls_descr_entry-column     = 1.
     APPEND ls_descr_entry TO ls_spot-description.
--end source
Best regards Maarten van Riel

Is the whole jar loaded for a single class?

Hi,
Hopefully this is an easy yes/no question.
If my application makes reference to only a single class in a jar that has many other classes, does the entire jar (all the other classes) get loaded into memory?
If so, then it's worth it to break the jars up into only those classes I need (they're third party jars). Otherwise, I'll have to look for some other solution.
TIA.
Mike

No you don't.Yes he does - he was big enough to admit it - can't you?
import xyz.* doesn't "load everything in memory" as
schapel stated. You better read chapter 1 of your book
again (and again until it sinks in) before answering
advanced forum's questions.Perhaps you should reread schapel's post before making hot-headed replies to the advanced forum's questions. Besides, you must not read these forums too much because this topic comes up a lot.

Background processing - load distribution guidelines

Hello,
We are using the HR module (ESS/MSS type Web application) in an ECC6 system.
Due to the business needs we need to run heavy interfaces job.
Basically the interfaces background jobs would turn round the clock and we fear this will impact the end users running the dialog transactions.
While we can scale up the environment I was wondering if there are any guidelines or best practices from SAP regarding SAP background processing and interfaces. Recommendations like running interfaces background jobs outside businnes hours. Or anything similar that could help us approach the topic in a good way.
Currently we fell that we will misuse the system and we will generate a big impact on the end-user dialog performance.
Any hint is greatly appreciated,
Kind Regards,
Florin

you can use logon load balancing in scheduling those background jobs,
Re: Scheduling background job on Logon group
Re: Scheduling background job on Logon group
or you can speficify some particular jobs to be run only on application server so as to avoid the load in CI
and following also might help you
http://help.sap.com/saphelp_nw04/helpdata/en/c4/3a7f39505211d189550000e829fbbd/frameset.htm

How to keep the last slide image in the background during loading transition??

Does anyone have any good strategies for using the last slide as a static background image when one swf file transitions to another during the loading process? Basically, I'd like to keep the loading image ontop of the last slide during the transition.

Does this fairly recent post help?
http://forums.adobe.com/thread/561129
Erik

Problem Compiling JAR Loaded in Oracle 10g

I have loaded a JAR file into my Oracle 10g database using the following command-line:
Loadjava -force -oci8 -order -resolve -schema "MYSCHEMA" -user "USER/PASSWORD@HOST" -verbose "JarFile.jar"
Unfortunately, after loading the JAR contents, the resolution of the individual files never completes. The process runs for >24 hours. Is there a better way to complete this task? I have even tried compiling portions of the JAR file via Toad, but it appears the recursive nature of the dependencies causes the process to essentially hang.
Unless the JAR files compiles successfully, I can load my Java source code but my resulting Java stored procedures cannot compile because of my import references to the JAR file. My java code was compiled for JDK1.3 using JDeveloper 10.1.3.0.0 to eliminate conflicts with the Oracle JDK (JDK1.4). Is there a setting or a flag which would allow compilation of my source code without compiling the JAR file to utilize the Oracle JIT compiler?
Any assistance/suggestions would be greatly appreciated. Thank you.

Avi,
Thank you for the suggestion. As a result, I found how to load my JAR (iText JAR file) file without decompressing using loadjava -jarasresource MYJAR.jar but now the issue of referrencing this resource within my Java class so that it will compile once loaded into the database. Here is sample of my objects:
Oracle User-Defined Type:
CREATE OR REPLACE TYPE schema."BLOB_ARRAY" as varray(20) of BLOB
Java Source:
CREATE OR REPLACE AND RESOLVE JAVA SOURCE NAMED schema."JavaSource" AS
import com.lowagie.text.Document;
import com.lowagie.text.pdf.PdfCopy;
import java.io.ByteArrayOutputStream;
import java.io.*;
public class JavaSource{
public static Document doc;
public static ByteArrayOutputStream baos = new ByteArrayOutputStream();
public JavaSource(){}
public static PdfCopy getDoc(oracle.sql.BLOB[] docs){
PdfCopy writer = new PdfCopy(doc, baos);
return writer;
LOADJAVA:
loadjava -force -schema "SCHEMA" -user "user/password@sid" -verbose -resolve -unresolvedok -genmissing -jarasresource -genmisingjar "C:\JavaSource.java" "C:\iText.jar"
Oracle Package:
CREATE OR REPLACE PACKAGE schema."JavaSource" AS
FUNCTION getDoc(param1 schema.BLOB_ARRAY) return PdfCopy AS Language Java Name 'JavaSource.getDoc(oracle.sql.BLOB[]) return PdfCopy';
Oracle Function to query Database populating User-Defined type argument:
CREATE OR REPLACE FUNCTION schema.TestRun() RETURN schema.BLOB_ARRAY AS
tmpArray schema.BLOB_ARRAY := null;
BEGIN
tmpArray schema.BLOB_ARRAY := BLOB_ARRAY();
cursor c_blob is select blob_content from schema.doc_table;
BEGIN
for blob_rec in c_blob loop
tmpArray.extend;
tmpArray(tmpArray.count) := blob_rec.blob_content;
end loop;
END;
return tmpArray;
END;
I cannot get my class JavaSource to compile as VALID and therefore the Oracle Function schema.TestRun does not execute properly. Am I missing something? Assistance is greatly appreciated. Thank you.

Dynamic jar loading

Hello,
I have a java application which should accept the three parameters.
1) The jar file location
2) Particular Class file insdie that jar(we specified the location in step number 1)
3) And method name in that class.
My question is how to include specified jar location with jar name to CLASSPATH at run time. So that i can execute a particular method name in step number (3).
I would appreciate for the quick reponse or any input.
Thanks,
Raghu

You cannot change CLASSPATH at run time, but you can:
1) create a class loader
2) load the class from there
3) use reflection APIs to invoke the method.
The key here is the class loader class, usually this one:
http://java.sun.com/j2se/1.5.0/docs/api/java/net/URLClassLoader.html

Background color / loading time.

Amateur and beginner here. In need of few explanations and
help from experts. Really appreciate your time.
I have created simple slide shows movies to present 2 to 3
fading jpgs.
I inserte them in my pages using Dreamweaver. Average size of
the swf file is 200 KB.
My page backgrounds are dark in color and would like to avoid
the white shape behind my flash slide show just prior to loading.
In slow connections last sometimes 2 to 3 seconds.
I tried different things but can not find the right way. Is
my file too big ??
Do I need to preload something ??
Thank you.
Chris.

ch70 wrote:
> I see, could I simply insert my
> bgcolor="#303064"
> in the the following generated by Dreamweaver:
>
>
>
> <object
classid="clsid:D27CDB6E-AE6D-11cf-96B8-444553540000"
> codebase="
http://download.macromedia.com/pub/shockwave/cabs/flash/swflash.cab#ve
> rsion=7,0,19,0" width="540" height="360">
> <param name="movie" value="Animation
Flash/ice_collection.swf" />
> <param name="quality" value="high" /><param
name="LOOP" value="false" />
> <param name="menu" value="false" />
> <embed src="Animation Flash/ice_collection.swf"
width="540" height="360"
> loop="false" quality="high"
> pluginspage="
http://www.macromedia.com/go/getflashplayer"
> type="application/x-shockwave-flash"
menu="false"></embed>
> </object>
>
sure Chris
Just add
<param name="bgcolor" value="#99cc00" />
and in the embed line
width="540" height="360" bgcolor="#99cc00" loop="false".....
Best Regards
Urami
"Eat one live toad in the morning and nothing worse will
happen to you for the rest of the day."
<urami>
If you want to mail me - DO NOT LAUGH AT MY ADDRESS
</urami>

IWeb Help...page background not loading.

This may not be a specific iWeb issue, but I'm hoping that someone here has experience with this...
I just got a call telling me that a site I created is 'unreadable'. Based on further questioning, it seems like the the background color of the page (based on the template) isn't loading...so he's seeing white text on a white background (or not seeing, as the case may be).
Here's a link to the page:
http://www.centersoundrecords.com/CenterSound_Records/JerryHarrison.html
And he's using IE as his browser.
Thanks...

Brian:
It is important that you don't leave this like this. If google sees white text on a white background you risk your site being blacklisted from their search results. ( this happened to me)
The page looks fine to me ( I'm using Safari on a mac). Find out what system and browser that person was using and then get others to view your site and report to you (It could be isolated to that person)
If you do find others seeing the same thing one work around you could try is to use no page background color in combination with a black browser background and then republish.
Sincerely, David

Safari black images background while loading

Hello.
I have problem in Safari. During web-page loading on places, there images placed i see black boxes. It looks like when image download in progress Safari displays black background of it. I noticed that it happens only with progressive JPEGs (this type of JPEG loads progressively from low-res image to full-res, so you firstly see low-res image, after a while a mid-res and when image 100% loads you will see full-res image). It happens all over internet sites, for example, right image on site below during loading have black background:
http://bbshowcase.org/progressive/
In any of other browsers images loads normally.
I found some topics in the internet about this issue, but no solution.
I currently use Safari v7.0.3 (9537.75.14) on Mac OS X 10.9.3 (Maverics).
I tested on another Mac with Safari 6 and found same issue.
If anyone can solve this, please, share the solution.

No problem with those images loading here.
You're running 7.0.3? Is there some reason you have not updated to 7.0.4?
If not, click Software Update from your Apple  drop down menu or open the App Store. Select Updates from the menu top of that window.
Updating Safari may make a difference.
And try troubleshooting Safari extensions and plug-ins.
From the Safari menu bar click Safari > Preferences then select the Extensions tab. Turn that OFF, quit and relaunch Safari to test.
If that helped, turn one extension on then quit and relaunch Safari to test until you find the incompatible extension then click uninstall.
If it's not an extensions issue, try troubleshooting third party plug-ins.
Back to Safari > Preferences. This time select the Security tab. Deselect: Allow all other plug-ins. Quit and relaunch Safari to test.
If that made a difference, instructions for troubleshooting plugins here.

White background while loading?

There's a white background visible as my flash swf loads. The
background is set as the same color as the page background. Is
there a way to fix this? Does my flash swf just need to load more
quickly?
http://www.aprilaromatics.com/AAindex.html
Thanks!
~*Beth

Hi Beth,
it is the way I guessed, you don't have the bgcolors defined
in your object and embed tags. I have done that already. Should I
post the code here for you to copy and paste, or email you the
file?
BTW.: This would be a good moment to incorporate something
like swfObject to circumvent the "Active-Content" issue and add
flash detection and a non-Flash alternative, while we are at it.
:-)

Why is ENTIRE rt.jar loaded into memory?!?!?

We're developing under JDK 1.4-beta2 and are close to releasing to in-house use of our application. One thing noticed is that the entire rt.jar and other jars get loaded into memory equaling ~45MB !! I am amazed if this is 'normal' behaviour. Are we missing some tweak or option grossly obvious or well known?
Even a simple Hello World test program loads in the entire rt.jar.
HELP!!

cross post
http://forum.java.sun.com/thread.jsp?thread=184491&forum=37&message=588369

Jar Loading and Retrieving Classes

How can I load and retrieve classes from a jar file?

I still do not know what you mean by "retrieve".
Are you trying to read bytecode for a class from the jar using util.jar.*,
or are you trying to get the class object for a class in a jar,
or are you trying to create an instance of a class from a jar,
etc.
What exactly do you mean by "retrieve" a class?

Background Jar Loading

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