Forms 2.1 calling shared object libraries

Can Forms 2.1 on Solaris 2.6 make calls to shared object
libraries? What are the limitations / issues?
I have a large legacy COBOL program which I would like to
restructure and capture the business rule implementations into
shared object libraries. I would then like to implement a new UI
(character or GUI) for part of the system in Forms. I would
consider using forms built in features for getting data from the
database but all inserts updates and deletes will go through the
business rule layer implemented in COBOL and deployed as shared
object libraries on unix.
Any and all help is appreciated.
Regards
Terry Bakker
null

Terry Bakker (guest) wrote:
: Can Forms 2.1 on Solaris 2.6 make calls to shared object
: libraries? What are the limitations / issues?
: I have a large legacy COBOL program which I would like to
: restructure and capture the business rule implementations into
: shared object libraries. I would then like to implement a new
UI
: (character or GUI) for part of the system in Forms. I would
: consider using forms built in features for getting data from
the
: database but all inserts updates and deletes will go through
the
: business rule layer implemented in COBOL and deployed as shared
: object libraries on unix.
: Any and all help is appreciated.
: Regards
: Terry Bakker
I have used Foreign Function Interface call (FFI) in Forms 5.0
to call function in Dynamic Linking Library (DLL) on Windows/NT.
You may be able to do the same thing (use FFI) to call shared
object libraries on Solaris.
Peter Ng
null

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Hi,
Do you have any 11i instance where those custom forms are used? If yes, you will have to copy those forms from 11i to R12 instance, open the forms using Forms 10g builder, compile it and upload it back to the server.
Note: 427879.1 - How To Customize And Compile An Application Seeded Form (FMB) Or Library (PLL)?
Note: 743490.1 - Customization in Oracle Applications
Note: 563258.1 - How To Upgrade 11i Custom Forms And Reports To R12
Regards,
Hussein

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How (or what) do we set when using shared object libraries?
We have Java Native Methods which are implemented using C++ and stored in shared object libraries. We can build our project, but when trying to execute the project, the shared object libraries are not found. We had tried to set the external execution settings to include the library paths, but nothing seems to take affect.
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RK,
I appreciate your responce, hopefully we'll get this worked out. I will try to give you as much information as I can so you will hopefully understand the problem.
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There are no property settings available on the J2EE Server Execution Properties to set.
What do we need to set so that this Shared Object Library will be located during execution of our project under SJSC?
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--Scott

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Hi Trevor,
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Cheers,
Stefan Mueller

Error while loading shared libraries: librt.so.1: cannot open shared object

error while loading shared libraries: librt.so.1: cannot open shared object
I cant run my apache server v2.2.3.
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thanks in advance

That could be an accessibility issue. Check the user with whom you installed Apache server. Check the user has permissions to access the libraries.
-Mahendra.

Error 0(Native: listNetInterfaces:[3]) and error while loading shared libraries: libpthread.so.0: cannot open shared object file: No such file or directory

Hi Gurus,
I'm trying to upgrade my test 9.2.0.8 rac to 10.1 rac. I cannot upgrade to 10.2 because of RAM limitations on my test RAC. 10.1 Clusterware software was successfully installed and the daemons are up with OCR and voting disk created. Then during the installation of RAC software at the end, root.sh needs to be run. When I run root.sh, it gave the error: while loading shared libraries: libpthread.so.0: cannot open shared object file: No such file or directory. I have libpthread.so.0 in /lib. I looked up on metalink and found Doc ID: 414163.1 . I unset the LD_ASSUME_KERNEL in vipca (unsetting of LD_ASSUME_KERNEL was not required in srvctl because there was no LD_ASSUME_KERNEL in srvctl). Then I tried to run vipca manually. I receive the following error: Error 0(Native: listNetInterfaces:[3]). I'm able to see xclock and xeyes. So its not a problem with x.
OS: OEL5 32 bit
oifcfg iflist
eth0 192.168.2.0
eth1 10.0.0.0
oifcfg getif
eth1 10.0.0.0 global cluster_interconnect
eth1 10.1.1.0 global cluster_interconnect
eth0 192.168.2.0 global public
cat /etc/hosts
192.168.2.3 sunny1pub.ezhome.com sunny1pub
192.168.2.4 sunny2pub.ezhome.com sunny2pub
192.168.2.33 sunny1vip.ezhome.com sunny1vip
192.168.2.44 sunny2vip.ezhome.com sunny2vip
10.1.1.1 sunny1prv.ezhome.com sunny1prv
10.1.1.2 sunny2prv.ezhome.com sunny2prv
My questions are:
should ping on sunny1vip and sunny2vip be already working? As of now they dont work.
if you look at oifcfg getif, I initially had eth1 10.0.0.0 global cluster_interconnect,eth0 192.168.2.0 global public then I created eth1 10.1.1.0 global cluster_interconnect with setif. Should it be 10.1.1.0 or 10.0.0.0. I looked at the subnet calculator and it says for 10.1.1.1, 10.0.0.0 is the subnet. In metalink they had used 10.10.10.0 and hence I used 10.1.1.0
Any ideas on resolving this issue would be very much appreciated. I had been searching on oracle forums, google, metalink but all of them refer to DOC Id 414163.1 but it does n't seem to work. Please help. Thanks in advance.
Edited by: ayyappa on Aug 20, 2009 10:13 AM
Edited by: ayyappa on Aug 20, 2009 10:14 AM
Edited by: ayyappa on Aug 20, 2009 10:15 AM

a step forward towards resolution but i need some help from the gurus.
root# cat /etc/hosts
127.0.0.1 localhost.localdomain localhost
::1 localhost6.localdomain6 localhost6
192.168.2.3 sunny1pub.ezhome.com sunny1pub
192.168.2.4 sunny2pub.ezhome.com sunny2pub
10.1.1.1 sunny1prv.ezhome.com sunny1prv
10.1.1.2 sunny2prv.ezhome.com sunny2prv
192.168.2.33 sunny1vip.ezhome.com sunny1vip
192.168.2.44 sunny2vip.ezhome.com sunny2vip
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eth1 10.0.0.0
eth0 192.168.2.0
root# /u01/app/oracle/product/crs/bin/oifcfg getif
eth1 10.0.0.0 global cluster_interconnect
eth0 191.168.2.0 global public
root# /u01/app/oracle/product/10.1.0/Db_1/bin/srvctl config nodeapps -n sunny1pub -a
****ORACLE_HOME environment variable not set!
ORACLE_HOME should be set to the main directory that contain oracle products. set and export ORACLE_HOME, then re-run.
root# export ORACLE_BASE=/u01/app/oracle
root# export ORACLE_HOME=/u01/app/oracle/product/10.1.0/Db_1
root# export ORA_CRS_HOME=/u01/app/oracle/product/crs
root# export PATH=$PATH:$ORACLE_HOME/bin
root# /u01/app/oracle/product/10.1.0/Db_1/bin/srvctl config nodeapps -n sunny1pub -a
VIP does not exist.
root# /u01/app/oracle/product/10.1.0/Db_1/bin/srvctl add nodeapps -n sunny1pub -o $ORACLE_HOME -A 192.168.2.33/255.255.255.0
root# /u01/app/oracle/product/10.1.0/Db_1/bin/srvctl add nodeapps -n sunny2pub -o $ORACLE_HOME -A 192.168.2.44/255.255.255.0
root# /u01/app/oracle/product/10.1.0/Db_1/bin/srvctl config nodeapps -n sunny1pub -a
VIP exists.: sunny1vip.ezhome.com/192.168.2.33/255.255.255.0
root# /u01/app/oracle/product/10.1.0/Db_1/bin/srvctl config nodeapps -n sunny2pub -a
VIP exists.: sunny2vip.ezhome.com/192.168.2.44/255.255.255.0
Once I execute the add nodeapps command as root on node 1, I was able to get vip exists for config nodeapps on node 2. The above 2 statements resulted me with same values on both nodes. After this I executed root.sh on both nodes, I did not receive any errors. It said CRS resources are already configured.
My questions to the gurus are as follows:
Should ping on vip work? It does not work now.
srvctl status nodeapps -n sunny1pub(same result for sunny2pub)
VIP is not running on node: sunny1pub
GSD is not running on node: sunny1pub
PRKO-2016 : Error in checking condition of listener on node: sunny1pub
ONS daemon is not running on node: sunny1pub
[root@sunny1pub ~]# /u01/app/oracle/product/crs/bin/crs_stat -t
Name Type Target State Host
ora....pub.gsd application OFFLINE OFFLINE
ora....pub.ons application OFFLINE OFFLINE
ora....pub.vip application OFFLINE OFFLINE
ora....pub.gsd application OFFLINE OFFLINE
ora....pub.ons application OFFLINE OFFLINE
ora....pub.vip application OFFLINE OFFLINE
Will crs_stat and srvctl status nodeapps -n sunny1pub work after I upgrade my database or should they be working now already? I just choose to install 10.1.0.3 software and after running root.sh on both nodes, I clicked ok and then the End of installation screen appeared. Under installed products, I see 9i home, 10g home, crs home. Under 10g home and crs home, I see cluster nodes(sunny1pub and sunny2pub) So it looks like the 10g software is installed.

Error while loading shared libraries: libdl.so.2: cannot open shared object

I got the error when I run the Identity server "./start_ois_server"
Using Linux Threading Library.
/opt/netpoint/identity/oblix/apps/common/bin/ois_server: error while loading shared libraries: libpthread.so.0: cannot open shared object file: No such file or directory
rm: error while loading shared libraries: libc.so.6: cannot open shared object file: No such file or directory
OIS Server started with pid: 11241
[root@EX4200SRV02 bin]# /bin/sh: error while loading shared libraries: libc.so.6: cannot open shared object file: No such file or directory
Can someone help me resolving this issue?
thanks. Your help is very much appreciated.
thanks.

I resolved the issue by commenting "LD" in start_ois_server.

How To Creating A Object Libraries In Oracle Forms 6i

hi
All
I Not No How To Creating a Object Libraries In Oracle Forms 6i
How To Add Your Pl/sql Block In a Lib
But What Is Use it is i Know , So I Want To Creating a Object Libraries.
So Any One Have A Idea Plz Help Me.

Hi,
there is a good paper:
http://www.quovera.com/whitepapers/downloads/102_doc.zip
http://www.quovera.com/whitepapers/downloads/102_ppt.zip
Best,
Friedhold

[SOLVED] "cannot open shared object file" but library is installed

I'm trying to run a digital logic simulation tool called "atanua" but I'm getting a missing library error:
$ atanua
/opt/atanua101120/atanua: error while loading shared libraries: libSDL_image-1.2.so.0: cannot open shared object file: No such file or directory
I tried re-installing both atanua (from AUR) and sdl_image (from repos) but the error remains.
$ ldd /opt/atanua101120/atanua | grep sdl_image
libSDL_image-1.2.so.0 => not found
I can find the "missing" library though:
$ locate libsdl_image
/usr/lib/libSDL_image-1.2.so.0
/usr/lib/libSDL_image-1.2.so.0.8.2
/usr/lib/libSDL_image.a
/usr/lib/libSDL_image.so
And so can the loader:
$ ldconfig -v | grep sdl_image
libSDL_image-1.2.so.0 -> libSDL_image.so
My initial thought is that the problem is a name mismatch between the program and the system, but I don't know the proper way to fix this. Does anyone know what I should try next?
Here's my system specs:
$ uname -a
Linux 3.0-ARCH #1 SMP PREEMPT Wed Oct 19 10:27:51 CEST 2011 x86_64 AMD Athlon(tm) 64 X2 Dual Core Processor 4400+ AuthenticAMD GNU/Linux
Thanks for your help.
Last edited by spence (2011-10-30 20:22:07)

You're right. Some how [multilib] got disabled in my pacman.conf so I didn't spot a 32-bit version of the library. I uncommented the [multilib] lines, searched again, and found it. Problem solved. Thank you.

Confusion about shared objects...

Hi...
I'm building an application using JSP/Servlet technology and I've ecountered some behavior that is not that unexpected, but is something I can't seem to figure out how to get around.
I've been using two reference manuals over the last year, to learn JSP/Servlet development and I'm not sure that either one of them, do a very good job of explaining how to avoid the problem I'm seeing. (Or maybe they do, but I'm just too dense to figure it out.)
Both are O'Reilly manuals:
Java Servlet Programming - Jason Humber with William Crawford
Java Server Pages - Hans Bergsten
Anyway, I've tried to model my application using a MVC approach.
My controller servlet UserCtl.java is small and routes requests as a controller should.
My business logic is in a bean. UserBean.java This object has properties that represent the fields from my UserMaster table and corresponding setter/gettter methods. It also has methods to retrieve an individual user record, insert a record, update a record, delete a record and retrieve a list of records.
The scenario I'm experiencing is as follows:
I bring up my application in the browser on two different PC's.
I display the user list on each PC.
Now...
On each PC, I simultaneously click the Update User, selecting user 1 on pc 1 and user 2 on pc 2.
My application then, creates a record in a lock file, for each user record. This seems to work properly, even during the simultaneous click.
However...
When the update form is subseqently displayed, I have a situation where the form on each of the 2 pc's contains the same data.
I can verify that 2 different lock records were created, indicating that I did not click the same user by accident, however, the data in the form is clearly for only one of the users.
I've read the sections over and over and I feel like I understand their comments on concurrency and how the condition I'm seeing could occur, however, I've tried many things to overcome this and nothing seems to work.
Originally, I opened my JDBC database connection at the servlet level. I've subsequently tried doing it when I create the bean in the controller and subsequent to that, creating the connection object within the method that retrieves the user data inside the bean.
I've tried moving all my code into functions, so that any bean variables would be localized.
I've creating a bean from the JSP session bean object and then retrieving the record, and putting the bean back into the session object before moving to the update page.
Note... I've also enclosed my record retrieval code within a synchronize block.
I'm at a complete loss here. Nothing I do seems to work and I can consistently recreate this condition. Obviously, I can't move forward until I find out how to do this properly.
I'm disappointed in the Java Server Pages book, because the author encapsulated/wrapped all of his database i/o into his own database management routines.
This is a terrible practice for an author to perform. I understand the concept of why you would do that, however, it complicates learning the fundamentals first. I say show us how to do it the long way first, then show us how to improve on the implementation. Don't confuse an already complicated process with your own home-grown methodology.
Anyway... I digress. Can anybody give me any pointers or recommend a good book or web based example, that can show me how to overcome the issue I am encountering? My implementation is a straightforward, simple, approach. I am trying to grasp how this stuff works, without adding in all the extra stuff like tag libraries and XSLT, etc.
I just need to understand how to write a simple thread-safe application. I'll tackle the other stuff later. Oh... by the way... I have built the simple samples that overcome servlet class level counters that show the result differences between global variables at the servlet instance level versus reporting back localized variable values. I think that JDBC database access and/or bean creation, is more complex than that and that's where my problem is.
Any comments, pointers, references to simple samples, will be greatly appreciated.
Thanks,
Brett

          You do not need a shared files system - that is just for
          convenience. You do need to have identical directory stuctures
          for all instances in the cluster.
          Mike.
          "Tomato Bug" <[email protected]> wrote:
          >
          >hi all,
          > I have a confusion with shared objects in cluster.
          > A cluster needs a shared file system to store
          > configuration
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          >in the
          >shared file system but not put them on the servers in
          >the cluster.
          > Thanks.
          >
          > Tomato.

Issue with Shared Objects

Hi all,
I've a problem with a program working on Shared Objects technology.
We have a Job, scheduled in 18 parallelism, and each one writes into the SHM controlled by a SHMA Class.
At jobs ending, a program reads content from the area and sends an automatic e-mail with the results.
Everything works well if the writer program is executed on-line.
Otherwise, in background, seems that nothing is stored in the SHM.
Here's the code executed by the writer program:
FORM shared_memory_access TABLES it_fehler STRUCTURE rpfausg.
DATA: errors_reference TYPE REF TO data.
DATA: lx_pterl00       TYPE REF TO zcx_pterl00_collector.
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* --> Get SHM Access
      CALL METHOD zcl_pterl00_collector_root=>build
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* --> It's ok?
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* --> Fill Data:
        GET REFERENCE OF it_fehler[] INTO errors_reference.
        CALL METHOD zcl_pterl00_collector_root=>fill_area_with_data
          EXPORTING
            error_messages_dref = errors_reference.
      ENDIF.
    CATCH zcx_pterl00_collector INTO lx_pterl00.
      MESSAGE lx_pterl00 TYPE 'S' DISPLAY LIKE 'E'. "Non-blocking -> JOBS
ENDTRY.
ENDFORM.                    " SHARED_MEMORY_ACCESS
Here is the section from the class handling the attachment to the SHMA:
METHOD if_shm_build_instance~build.
DATA: lx_collector TYPE REF TO zcx_pterl00_collector.
* --> Automatic building of instance:
TRY.
      CALL METHOD get_handle_for_update( inst_name ).
    CATCH zcx_pterl00_collector INTO lx_collector.
      MESSAGE lx_collector TYPE 'X'.
    CATCH: cx_shm_no_active_version.
      TRY.
          CALL METHOD get_handle_for_write( inst_name ).
        CATCH zcx_pterl00_collector INTO lx_collector.
          MESSAGE lx_collector TYPE 'X'.
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    CATCH: cx_shm_inconsistent.
      zcl_pterl00_collector=>free_area( ).
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          CALL METHOD get_handle_for_write( inst_name ).
        CATCH zcx_pterl00_collector INTO lx_collector.
          MESSAGE lx_collector TYPE 'X'.
      ENDTRY.
ENDTRY.
ENDMETHOD.
I cannot explain why multiple jobs do not populate the area...

Hi Rob,
if your requirement is to have many (18) active processes all updating the shared object, and very few simply reading the shared object, then versioning is probably not what you require.
Versioning allows readers to continue to attach and read the active shared object instance while the updater gets their own instance of the shared object. When the updater does a detach_commit the old instance becomes obsolete and all new requests to attach will be diected to the new instance. The old instance will be cleaned up by garbage collection once all of its readers have detached.
If your programs primarily attach for update then you will decrease performance with versioning because a new instance needs to be created at every attach for update.
Perhaps you should just retry the attach for update after a small period of time has passed?
If, on the other hand, you do have lots of other readers of the shared object you may well still find that it is more efficient not to have versioning. I build a web shop catalogue using shared objects and found that versioning severly hampered performance. This was because, once the catalogue was initialised, updaters were pretty rare but readers were constant.
BTW make sure you keep the locks on the object as short as possible. Do all your preparation work first, then attach for update, update, detach as quick as possible.
Cheers
Graham Robbo

Building Shared Object for LabView

All;
I'm trying to build a C++-based shared object to be called from LabView and use SunCC instead of gcc. The compile stage looks like:danny@traveler:~/tubes/dielectric/rod_software/lookup> make -f Makefile.unix suncc=1
sunCC -I/usr/local/lv71/cintools -I/home/danny/src/NR_C301/code -c -KPIC -m32 -Di686 lookup.cc
"/home/danny/src/NR_C301/code/interp_1d.h", line 183: Warning: n hides Base_interp::n.
"/home/danny/src/NR_C301/code/mins_ndim.h", line 103: Warning: n hides Linemethod<extern "C" double(const NRvector<double>&)>::n.
"lookup.cc", line 176: Where: While instantiating "Powell<extern "C" double(const NRvector<double>&)>::minimize(const NRvector<double>&)".
"lookup.cc", line 176: Where: Instantiated from non-template code.
2 Warning(s) detected.and the load stage fails like this:sunCC -G -m32 -o lookup.so lookup.o /usr/local/lv71/AppLibs/liblvrt.so.7.1 /usr/lib/libGL.so /usr/lib/libOSMesa.so.6
/opt/sun/sunstudio12/prod/lib/crtn.o:(.text+0x0): multiple definition of `_etext'
make: *** [lookup.so] Error 1Is my problem obvious? Is there a simple example on how to build SOs? I found the switch definitions in the Sun documentation, but no good examples yet.
...Dan

If your library links to other shared libraries, use -L options to point to directories other than system directories, and the -l option for the library name after "lib".
When building shared libraries, you also need to list all system libraries explicity, unfortunately, to ensure your library has the right dependencies.
You should also add -zdefs to force the linker to complain about unresolved symbols. The default when building shared libraries is not to warn about them.
You want to be sure you have included all the needed libraries in the link.
Your link command should look like this :
sunCC -G -m32 -o lookup.so lookup.o -zdefs \
-L /usr/local/lv71/AppLibs -llvrt.so.7.1 -lGL.so -lOSMesa.so.6 -lCstd -lCrun -lm -lcYou don't need a -L option for /usr/lib or the directories in the Sun Studio installation. The CC driver knows where to find system libraries.
That said, I don't think the command line issues are the cause of the multiple definition error.
Binaries created by Sun C++ are not compatible with binaries created by other C++ compilers like g++. Is liblvrt.so.7.1 a g++ library?

How to create shared object in Open Vms environment.

          Hi All,
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          to use JNI(Java Native Interface )to call existing "C" function.
          Iam stuck at creating shared object on OpenVms. I would like to know what is the
          procedure for creating these shared objects for a given "C" programme.
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          code by using Microsoft C++ comipler.
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          Thanks in Advance,
          Prashanth Bhat.


You might also want to read the following series of articles:
http://www.oracle.com/technetwork/articles/servers-storage-dev/linkinglibraries-396782.html
Regards,
Darryl.

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