Two libraries needing different versions of a common library

I am currently writing an application that utilizes two libraries that depend on a third common library. However, each of the two libraries requires a different version of the third library. Is there any way this can be done?
I have done some research into writing custom class loaders but I haven't been able to find anything useful in this instance. Any help would be appreciated. Thanks.

It's not just a feature missing that's the problem.
If I use one version of the library, one part of the
program simply doesn't work. If I use the other,
then the other part of the program refuses to work.The problem you should be trying to solve is why the two libraries won't work with the same (latest) version of the shared library. It indicates that one of them is relying on buggy behavior, and should be fixed.
Do you have any access to the libraries' source code? You'd be far better off trying to figure out what changed, and how to fix the piece that relied on its old behavior, rather than any sort of hack (and changing package structure to work around a bug is definitely a hack, perhaps moreso than using a custom classloader).
Finally, what does "doesn't work" mean? Are you unable to compile? Are you able to compile but get incorrect results? Does the program crash?

Similar Messages

Confusion about third-party-libraries in different versions in CE 71.

Hi
After some research on the use of different versions of third-party-libraries in SAP netweaver CE 7.1, I am actually quite confused and would be happy if someone could shed a light on that subject....
1. Is there a way to tell netweaver CE 7.1 to use a library in my WEB-INFlib-folder by simple configuration?
E.g. we would like to use a third-party-lib in a newer version than the one which is loaded by CE 7.1. Many application server provide a simple configuration option (e.g inside META-INFapplication.xml) where the web as can be forced to use the library inside WEB-INFlib for this application.
2.Is the concept of "heavy loading" described in a blog by Georgi Danov(Using Hibernate in SAP NetWeaver Composition Environment) the answer to question 1.?
Does it also work for other third-party-libraries than hibernate? Does it work at all?
3. In the blog mentioned in question 2, Mr. Danov is talking about "shared libraries". Does this mean, that I have to forget everything about "bundled" and "standard" libraries explained in help.sap.com/CE, if I want to create a heavy loader?
He is referencing another blog (Applications and shared libraries) which is two years old? Can I still apply the information there to CE?
4. Are "Bundled libraries" applicable when using different versions of third-party-libraries in CE 7.1?
In "Working with libraries" (http://help.sap.com/saphelp_nwce10/helpdata/en/44/f4e00e56ec0486e10000000a155369/frameset.htm) it says:
"Bundled libraries: These provide resources only to a single enterprise application, and are packed inside the application's EAR file."
=>As I want to provide the lib only to my enterprise application, I will probably have to create a bundled library, right? Does this also work if netweaver CE 7.1 uses a different version of the same library?
5. Do I need Netweaver Developer Studio for creating "bundled" libraries?
Or can I copy the binaries in the WEB-INFlib-folder of my application, deploy it and use it?
6. Is configuration of application-j2ee-engine.xml the right place to reference a third-party-library in a specific version which exists in WEB-INF/lib-folder in my application even if it exists also in another version on netweaver?
=> In the document "Troubleshooting: Finding Missing Parent-Child Relations" it says: "To implement the chain of parent-child relations in the deployment descriptor of the component, use either application-j2ee-engine.xml (for applications) or provider.xml (for libraries and services)."
=> "Creating standard libraries" (http://help.sap.com/saphelp_nwce10/helpdata/en/44/f447a8d62b0484e10000000a155369/frameset.htm9 tells me, that I have to configure the file application-j2ee-engine.xml, too.
=> But in "Working with libraries" (http://help.sap.com/saphelp_nwce10/helpdata/en/44/f4e00e56ec0486e10000000a155369/frameset.htm) it says:
"Standard libraries: These provide resources to all enterprise applications deployed on the server. They are packed in EAR files like the enterprise applications."
=> Does this mean, that I have to force Netweaver CE 7.1 to use a higher version of a certain third-party-library? Does this even work? Do all applications deployed on Netweaver 7.1 have to use this library in the higher version?
It is really confusing to read through the documentation!!! Sorry for that avalanche of questions, but I really hope it will make the issue of using libraries (especially if they exist in different versions on the CE 7.1) a little clearer!
Best regards
Bettina

Hi Bettina,
I'll try to answer your questions:
>
> Hi
>
> After some research on the use of different versions of third-party-libraries in SAP netweaver CE 7.1, I am actually quite confused and would be happy if someone could shed a light on that subject....
>
> 1. Is there a way to tell netweaver CE 7.1 to use a library in my WEB-INFlib-folder by simple configuration?
>
> E.g. we would like to use a third-party-lib in a newer version than the one which is loaded by CE 7.1. Many application server provide a simple configuration option (e.g inside META-INFapplication.xml) where the web as can be forced to use the library inside WEB-INFlib for this application.
>
First of all, the appropriate docs are here: [http://help.sap.com/saphelp_nwce10/helpdata/en/44/f4e00e56ec0486e10000000a155369/frameset.htm|http://help.sap.com/saphelp_nwce10/helpdata/en/44/f4e00e56ec0486e10000000a155369/frameset.htm].
Basically what you do is define a lib project in the studio and deploy it do the server. This may be less comfortable then just configuring manually, therefore it work better in larger environments because the server checks that libs are available in all running instances - which it could not do if you manipulate diretories manually (an approach you should never attempt in any SAP envrionment)
> 2.Is the concept of "heavy loading" described in a blog by Georgi Danov(Using Hibernate in SAP NetWeaver Composition Environment) the answer to question 1.?
>
> Does it also work for other third-party-libraries than hibernate? Does it work at all?
>
If Georgi describes it, I hope so, as he is one of our developers who knows best.
> 3. In the blog mentioned in question 2, Mr. Danov is talking about "shared libraries". Does this mean, that I have to forget everything about "bundled" and "standard" libraries explained in help.sap.com/CE, if I want to create a heavy loader?
>
"shared" are all of theses libs, as otherwise they would be specific to an application.
> He is referencing another blog (Applications and shared libraries) which is two years old? Can I still apply the information there to CE?
>
This was about anearly version of CE and even Georgi updated the blog this year to talk about slight differences. So yes, this still applies.
> 4. Are "Bundled libraries" applicable when using different versions of third-party-libraries in CE 7.1?
>
> In "Working with libraries" (http://help.sap.com/saphelp_nwce10/helpdata/en/44/f4e00e56ec0486e10000000a155369/frameset.htm) it says:
>
> "Bundled libraries: These provide resources only to a single enterprise application, and are packed inside the application's EAR file."
>
> =>As I want to provide the lib only to my enterprise application, I will probably have to create a bundled library, right? Does this also work if netweaver CE 7.1 uses a different version of the same library?
>
That depends... Your application uses it's own classloader which means it should only use your libs in case there is another version available on the server. But if you're trying to deploy a lib that is used by a service of the server (int that case loaded by the server not your classloader!) I'm not so sure.
> 5. Do I need Netweaver Developer Studio for creating "bundled" libraries?
>
> Or can I copy the binaries in the WEB-INFlib-folder of my application, deploy it and use it?
>
You need the Studio. No way around that. [Edit:] Sorry, misunderstood you here: I thought you want to copy something into the deployed directory on the server! - Of course, any deployment method would do it and though copying binaries seems to be valid. However, I'm checking this currently with development in detail.
> 6. Is configuration of application-j2ee-engine.xml the right place to reference a third-party-library in a specific version which exists in WEB-INF/lib-folder in my application even if it exists also in another version on netweaver?
>
> => In the document "Troubleshooting: Finding Missing Parent-Child Relations" it says: "To implement the chain of parent-child relations in the deployment descriptor of the component, use either application-j2ee-engine.xml (for applications) or provider.xml (for libraries and services)."
>
> => "Creating standard libraries" (http://help.sap.com/saphelp_nwce10/helpdata/en/44/f447a8d62b0484e10000000a155369/frameset.htm9 tells me, that I have to configure the file application-j2ee-engine.xml, too.
>
> => But in "Working with libraries" (http://help.sap.com/saphelp_nwce10/helpdata/en/44/f4e00e56ec0486e10000000a155369/frameset.htm) it says:
>
> "Standard libraries: These provide resources to all enterprise applications deployed on the server. They are packed in EAR files like the enterprise applications."
>
> => Does this mean, that I have to force Netweaver CE 7.1 to use a higher version of a certain third-party-library? Does this even work? Do all applications deployed on Netweaver 7.1 have to use this library in the higher version?
>
>
>
> It is really confusing to read through the documentation!!! Sorry for that avalanche of questions, but I really hope it will make the issue of using libraries (especially if they exist in different versions on the CE 7.1) a little clearer!
>
> Best regards
> Bettina
Could you tell me what you're trying to deploy? I'll try to get Georgi on this....
Regards,
Benny
Edited by: Benny Schaich-Lebek on Nov 5, 2008 1:40 PM

Can client dynamically link to shared libraries for different versions ?

Can Oracle client dynamically link to Oracle shared libraries if the versions are different ?
Hi:
I apologize for this newbie question:
We are using PRO C to generate the client C code.
We can compile both dynamic and static versions of our Oracle client.
Our question is:
is it possible to compile a dynamically linked Oracle client in say version 10.1.0.2 and actually run the application against say version 8.1.7.0 environment ?
That is, can an Oracle client dynamically link to the Oracle shared libraries if the versions are different ?
If it is possible, then how to modify the makefile
to enable Oracle client to reference different versions
of shared libraries ?
Thanks
JL

What you describe is not supported.

Why I need different versions in BCS

What is the need for having different version in BCS? Can any one explain with example?

one reason would be comparative reporting
we have the following versions implemented:
100 - actuals
B00 - Budget version 1
F00 - Forecast version 1
F01 - Forecast version 1
F02 - Forecast version 1
F03 - Forecast version 4
FL0 - Flash version
the EhP2 has restating versions 200 and 300 I believe....
if anyone wonders why the forecast versions look funny, it is because our management is used to these versions...
so, I load budget and forecast into BCS via flatfiles (until we get IP up) and can run flash to actuals, flash to budget/forecast, actuals to budget/forecast comparative reporting
let me know if this helps

Is it possible to run 2 programs that need different versions of a library?

Hi,
I have the following situation.
Tomcat 5.0 Server.
Program A is running on server, and needs axis 1.1 as a library.
Program B is running on the same server, and needs axis 1.4 as a library.
Axis 1.1 and 1.4 are not backwards compatible... if I just put 1.1 on it.. program B won't work.. If I just put 1.4 on it, program A won't work.
Tomncat doesn't seem to like having the same jar loaded in twice.
How do I make this all work? I really don't want to have to try to manually convert a large application from using 1.1 to 1.4 or vice versa, want to try to make them both work...
Edited by: TunaBoo on Jan 10, 2008 10:00 PM

No.

Sharing Files Amongst Two Computers With DIFFERENT Versions Of Windows (XP & Vista)

I just bought a WRT54G4 Wireless-G broadbad router & am a n00bie to this whole networking thng. As things stand now, I have got everything whereas both my desktop PC (Windows XP Home Edition) & my wireless laptop PC (Windows Vista Home Premium) are online (Both local & Internet) HOWEVER I cannot seem to get things whereas my desktop PC shares files which can then be viewed & otherwise accessed by the laptop.
Here's what I'm trying to do....
* Have BOTH computers access the Internet via private network (This I have already managed to do)
* Have the desktop share files which can be accessed (Wirelessly or not) by my laptop
Essentially, I want to be able to make use of BOTH HDs as needed.
My desktop is an old AMD Duron 1 Ghz. computer with 512MB of RAM & can handle SOME small tasks however the big gun is my laptop (A 1.86 Ghz. Intel Pentium with 3 GB of RAM). Because of it's speed & memory, I'd like to have the laptop handle the larger & more intensive tasks.
Although my laptop has a smaller HD compared my desktop (A 136 GB HD in the desktop (Out of 200 GB) compared to a 141 GB (I'm guessing this HD is around that size but since it came pre-installed & I'm currently leasing-to-own, I don't know), I'd like to be able to make use of BOTH HDs if at all possible. All I need is for the two computers to see the two HDs & all the files on it.
I have tried the setting up of file sharing as instructed elsewhere on the Linksys site, but lost it when I restarted both of my computers since that's what the page told me to do (I followed the Windows XP as the desktop has all the files I want to be shared & Windows XP is the OS of the desktop). Should I have not done this?
Also, my ultimate goal is to GET RID of the big bulky monitor which I have plugged into the back end of my desktop PC & just simply use the laptop instead since it doesn't take up so much room on the desk. Is there a software-based "Virtual Monitor" or monitor emulator of some kind which I can download (FREE please ) that will allow me to see the desktops of all the computers on my network just as if I
had REAL monitors? If so, where might I find one?
In short, whle I have accomplished a great deal in these last few days since I bought the router & linked the two computers together, as you can see, I still need some help & I've got some learning to do.
Any help I can get wouldbe MOST appreciated.
Cheers
Pat Cook
Denver, CO
Message Edited by asmyworldturns on 07-06-2009 06:32 PM
Solved!
Go to Solution.

File & Printer Sharing IS enabled on the desktop (Which has all the files I wish to share) HOWEVER.....
Ricewind wrote:
Make sure File and Printer Sharing is Enabled...
Also make sure both the computer's are in the same workgroup...
The default workgroup name in Windows Vista has been changed to WORKGROUP. In WindowsXP, the default workgroup name is MSHOME...
Also go into the computer software firewall on each computer, and set it to "trust" the other computers on your network.
If your firewall or PC security program keeps a list of trusted applications (also known as a "trusted zone"), then make sure that your router is in the trusted zone on your firewall...
As indicated before, both computers have DIFFERENT operating systems. The laptop has Windows Vista HP installed while the desktop has Windows XP HE installed. As such, are you suggesting that I stick with the default workgroup names just to keep things simple?
As for the firewall & other security software, I have Windows Defender plus SpyBot (Desktop only), ThreatFire & AdAware (The latter I rarely use since ThreatFire fills this need rather nicely). Would I have to go into Defender on both computers & tell it to trust the other computer? Network Magic already does this with both computers (Yes, I have Network Magic installed on both computers).
Cheers
Pat Cook
Denver, CO

Consolidating iPhoto libraries form different versions of OSX to an external HD.

Getting a new MacPro.
I have iPhoto content in Leopard, SnowLeopard and LION. I want to transfer all of these files onto one external backup drive so that I can consolidate all of them into one library. Where should I look and what files need to be transferred?
Is there an APP that will assist in consolidating all of these into one iPhoto library in Mavericks?

Where should I look and what files need to be transferred?
Where - only you know that - look whre the iPhoto libraries are
What - each iPhoto library - there are no files or parts - an iPhoto library is a single entity with no user servicable part in it - simply drag intact iPhoto libraries to the new external hard drive (each will have to have different names or be in different folders so as not to interfear with each other)
Is there an APP that will assist in consolidating all of these into one iPhoto library in Mavericks?
Either Aperture or iPhoto Library Manager - http://www.fatcatsoftware.com/iplm/ - can merge libraries
LN

Is it posssible to install two RACs with different version on one IBM HACMP

The version of HACMP is 5.4. The version of Oracle database can be 9i or 10g, or both are 10g.
thansk a lot

Hi,
We have an oracle 10g database configured with RAC. We also have an oracle 9i that is not configured with RAC. You mean that if I want to install another RAC on the HACMP, I need upgrade to 10g. Rigth?What i understand from your above point is : you want to configure your 9i database with IBM HACMP cluster, if its so then u need not have to upgrade to 10g or RAC i can straight away finish this task.
Contact your HACMP vendor for steup and technical documents for settingup HACMP on 9i database.
I think your doubt is now cleared.
Regards,
X A H E E R

What happens if two iPhones with different versions of ios share an identical ID and password?

I activated my new iPhone 6 as a replacement of my old iPhone 4, using the same apple ID and phone name. Everything the old iPhone 4 had is now on the new phone. What happens if I connect my old phone, which I believe is still registered as before, to iTunes? All the applications on 6 (ios 8.1.3) have been updated and my iPhone 4 has ios 7. If I back up the old 4 on to my iTunes account, does it affect my new iphone 6 when I up date it on the same iTunes account?

MacMost Now 653: Setting Up Multiple iOS Devices For Messages and FaceTime
Yuu can also
Create a NEW account/ID for her using these instructions. Make sure you follow the instructions. Many do not and if you do not you will not get the None option. You must use an email address that you have not used with Apple before. Make sure you specify a birthdate that results in being at least 13 years old
Creating an iTunes Store, App Store, iBookstore, and Mac App Store account without a credit card
More details of how:
http://ipadhelp.com/ipad-help-tips-tricks/how-to-get-free-apps-from-the-app-stor e-without-a-credit-card/
Use the new ID on her iPod but only for:
Settings>Messages>Send and Receive
Settings>FaceTime
Settings>GameCenter
and Settings>iCloud if you want her to have separate Contacts Calendar and some other things.
Continue to use the same/common Apple ID for Settings>iTunes and App stores so you can share purchases.

Two Instances of different Versions of iAS on one Server possible?

Hi!
One of our customers wants to upgrade his Forms-Applications from 9.0.4.2 to 10.1.2. He says, we should install a second iAS (10.1.2) on the Development-Server, where already an iAS 9.0.4 runs. Is this possible? And if yes, are there any threads with a cooking recipe how to install the second iAS?
Thanx in advance for any answer!

Hi,
Yes you can. It's adviceable to do that on another server. If you decide to do that on the same server then you'll need to use another directory for your new AS.
Regards,
Hamdy

Different versions of a library on the server

Hi,
is it possible to have different versions of the same library on the server?
The reason for this is that we have some utility classes which should be deployed on the server as a library (because they are used by many projects). But the different versions of the utility classes are not necessarily compatible, which means that some projects still need to reference the old versions of the utility classes.
Or is the only solution in this case to inculde a jar-file with the utility classes in every project and thus not referencing a library at all?
Kind regards.
Achim

Hi Achim,
No, it's not possible to have different versions of the same library (or any other type of component) on the server. You can also have a look at Two versions of a JAR library.
Best regards,
Vladimir

How to compile against multiple libraries w/ different API's

I am trying to write code that will run with 2 different versions of a Java library. The API is different between those 2 library versions.
For example in library v1.1 I have a method:
myMethod(String x) {...}And in library v1.2 I have a method:
myMethod(String x, String y) {...}In my calling code I have a way to determine what version of the library is present. I want to dynamically choose at runtime which API to call based on this version. Roughly, the code would look like this:
if (version = "1.1")
myMethod("arg1"); //call 1.1 API
else if (version = "1.2")
myMethod("arg1","arg2"); //call 1.2 API
}The problem is that I cannot compile my code with both versions of my library at the same time. The method whose corresponding library is not used to compile always causes an error.
Can someone suggest a design pattern that I can use to get around this? There must be some way to call a different version of myMethod() (with different number of parameters) without exposing it to the compiler.
Thanks.

The problem is that I cannot compile my code with
both versions of my library at the same time. The
method whose corresponding library is not used to
compile always causes an error.
Huh?
You do have two versions of the library right? And you can compile both right?
If so then the problem is the application.
If so.....
- You create a proxy library. It loads the real library dynamically using reflection based on however you determine which is correct.
- You compile the application using the proxy library.
Note that in the above the application is NOT compiled with the two real libraries. The libraries are compiled seperately.

Firefox Sync on same computer with different versions of Firefox

Hi,
I know how to use Sync on two different computers and a mobile device, but how can I Sync two or more different versions of Firefox (Nightly, Beta, Aurora, Release Candidate)? I can't get the code from the other computer/firefox because I can only have one version of Firefox open at the same time. I tried it. This is my setup. I have a different Profile for each version of Firefox I have. I also have each version of Firefox installed in a different directory, for example:
Nightly - C:\Program Files\Mozilla Firefox\Nightly\
Aurora - C:\Program Files\Mozilla Firefox\Aurora\
Beta - C:\Program Files\Mozilla Firefox\Beta\
Release Candidate - C:\Program Files\Mozilla Firefox\Release Candidate\
and my Profiles are in my
Nightly - C:\Users\David\AppData\Roaming\Mozilla\Firefox\Profiles\David-Nightly\
Aurora - C:\Users\David\AppData\Roaming\Mozilla\Firefox\Profiles\David-Aurora\
Beta - C:\Users\David\AppData\Roaming\Mozilla\Firefox\Profiles\David-Beta\
Release Candidate - C:\Users\David\AppData\Roaming\Mozilla\Firefox\Profiles\David-Release Candidate\
and I run Firefox with the following command (Properties/Target)
"C:\Program Files\Mozilla Firefox\Nightly\firefox.exe" -P "David-Nightly"
"C:\Program Files\Mozilla Firefox\Nightly\firefox.exe" -P "David-Aurora"
"C:\Program Files\Mozilla Firefox\Nightly\firefox.exe" -P "David-Beta"
"C:\Program Files\Mozilla Firefox\Nightly\firefox.exe" -P "David-Release Candidate"
Can anyone help me so that I can Sync all the accounts (basically, just the bookmarks), so I will have access to all my bookmarks, instead of going to the firefox version I saved it in? I would appreciate any and all assistance concerning this matter.
Thank You.

Use the -no-remote command line switch to open another Firefox instance with its own profile and to run different Firefox instances simultaneously, but do not use -no-remote with the default browser and the default profile.
* http://kb.mozillazine.org/Opening_a_new_instance_of_Firefox_with_another_profile
Enter all details like the account name (email address) and password and the 26-character Sync key manually to connect to an existing sync account instead of using the 12-character code to pair a device if pairing isn't possible.
# open "Tools > Options > Sync" or "Firefox > Set Up Sync"
# click "Set Up Firefox Sync" to go to "Firefox Sync Setup"
# click "I Have an Account" : Connect
# click "I don't have the device with me" at the bottom to enter the account settings (email, password, sync key)
# click the "Sync Options" button at the bottom to select what to sync (Sync Options only affect the first sync)

Different versions of sent mail on server

I have an iMac with OS 10.7.5 and Mail 5.3. I also have an iPad Mini and an iPhone 4S, both running iOS 6.1.
On all devices I have selected mail to store the sent mail and trash on the server.
Even though they are all selected to store on the server, there are still separate versions of these mailboxes. In other words, if I send a message from my iPhone, I can only see it in the sent mail folder of the iPhone. If I send a message from my iPad, I can only see it in the sent mail folder of the iPad. If I send a message from my iMac, I can only see it in the sent mail folder on the iMac. ALL THREE are selected to store in ON THE SERVER.
Why separate versions?

Hi Achim,
No, it's not possible to have different versions of the same library (or any other type of component) on the server. You can also have a look at Two versions of a JAR library.
Best regards,
Vladimir

Accessing an itunes library from different version of itunes

I recently installed yosemite and with that came iTunes 12 since I have an iPhone 6 with 8.1 I will keep iTunes 12. But I have been having major issues with syncing video files to my iphone 4S(ipod touch now) 7.1.2JB. The files never sync or appear to sync and then when I go to view them on the iphone the size shows up as zero. So I feel like if I go back to an older version iTunes all will be right in the world. I just wonder will I have any issues if I have different versions accessing the itunes library files? Planning on using iTunes 11.4 and iTunes 12.
TIA

Open the iTunes preferences, click on the Advanced tab, turn off the option to automatically copy the music to the iTunes Music folder, and then drag the library on the Windows partition to the open iTunes window. This will not transfer playlists and other metadata and will not keep the Mac version of the library in sync.
(33924)

Two libraries needing different versions of a common library

Similar Messages

Maybe you are looking for