Reading a writing Shared Objects

I'm not sure if I'm not getting something here, but I have a
webservice that gets a string back in the form of XML. I end up
placing that data in the XMLList in the property of the shared
object. Is that possible? It seems like it works when I make
reference to it after the WS has been called
However, I don't want to call the webservice everytime the
app runs. When I make reference to the shared object ie:
<mx:Label text="{storeInfo.data.xmlContent
.location_url}"/> after the webservice runs - works great.
However, it seems like the data is not there when the webservice
doesn't run.

I haven't tried saving a XMlList object, but the
documentation says that you can store only simple data types such
as String, Array and Date. Please find more details in below URL.
Can you try saving data of simple data types and check out if it is
working. Please do make sure you are flushing the data.
http://livedocs.adobe.com/labs/flex3/html/lsos_2.html#132694
Hope this helps.

Similar Messages

Problem Assigning Local Shared Object

I have created a swf that increments a dollar amount every
five seconds. My clients want this dollar counter to be consistent
between HTML pages. That is where the local shared object comes in.
I can create it fine, and even read it (I know this by a trace() I
used). But for the life of me I can't get the value from the shared
object passed to the dynamic text field as soon as the swf is
loaded. It always starts at the beginning increment of 0.192!
I'm pretty sure what is messing me up is either the function
that formats the number to a dollar format or the function that
increments the dollar value up every five seconds and saves that
value to the shared object.
Using the code below, you can create a flash file with a
dynamic text labeled 'money' and the actionscript copied into the
first frame on the timeline.
Any help would be great appreciated!

aasimmomin wrote:
> Hi,
>
> I have 2 files *.swf files. The first one is creating a
shared object while
> the second one reads the created shared object.
> The files works perfectly on my local machine and on my
server, but the second
> file is not able to read the shared object on the
client's server.
> Although both files work perfectly well on the client's
local machine.
>
> I have checked and found that there is no synchronizing
problem between the
> writing and reading of the shared object.
>
> Could there be some settings on the client's server
which may be missing?
do not post same question to multiple forums, post in one and
stick to it.
http://www.adobe.com/support/forums/guidelines.html
Adobe forums posting guidelines
When posting messages...
- in DON'T Section :
Don't cross-post or double-post. Posting a message to more
than one forum (i.e "cross-posting" is
unnecessary, and creates extra traffic for you and others to
read through. If you've already posted
a question, please don't repeat your posts in order to get
more attention- this makes it very
difficult for others to see if and/or where your question was
answered.
Regards
Urami
Happy New Year guys - all the best there is in the 2006 :)
<urami>
http://www.Flashfugitive.com
</urami>
<web junk free>
http://www.firefox.com
</web junk free>

Shared object and different application servers - how to resolve this issue

Dear SDN Members,
We are occuring a big problem. We create a shared object in a program and after we call in an another one. In central system architecture, it is working well. But on a distributed architecture (4 application servers), we have a dump some times. In fact, the read of the shared object can be occured in the AS 4 but the share object has been created in AS1.
How to manage this problem to avoid this dump ?
Dupplicate the shared object in the application servers ?
Encapsulate different calls with RFC link to only one AS ?
Any parameters on server or share objects ?
Thanks a lot for your help,
Points will be given to right or good answers.
Br,
Aurélien

What is the dump you are getting ?
AFAIK, "Shared Memory"(SHM) is an area defined in the app server. I am not sure if you can access SHM of a different app server (as in your case trying to access SHM of AS1 from AS4). [http://help.sap.com/abapdocu_70/en/ABENSHARED_MEMORY_GLOSRY.htm]
In this case you can opt for "DataBase Clusters". Relevant ABAP statements: [IMPORT|http://help.sap.com/abapdocu_70/en/ABAPIMPORT_MEDIUM.htm#!ABAP_ALTERNATIVE_4@4@]/[EXPORT|http://help.sap.com/abapdocu_70/en/ABAPEXPORT_DATA_CLUSTER_MEDIUM.htm#!ABAP_ALTERNATIVE_4@4@] FROM/TO DATABASE.
Hope this helps.
BR,
SUhas

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.
TRY.
* --> Get SHM Access
      CALL METHOD zcl_pterl00_collector_root=>build
        EXPORTING
          invocation_mode = cl_shm_area=>invocation_mode_explicit.
* --> It's ok?
      IF zcl_pterl00_collector_root=>area_exists EQ 'X'.
* --> 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'.
      ENDTRY.
    CATCH: cx_shm_inconsistent.
      zcl_pterl00_collector=>free_area( ).
      TRY.
          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

Shared object not writing?

I have a client who has a video that is to only play once when a user visits. So I created a shared object to create a param that the video has been played. It works perfect locally and on my live test site. However when the client posts it on his ning website in the header it doesn't work. The strange thing is that live and locally on my server you can see the shared object and it's size through the advanced tab in Flash's privacy settings. When on his server the size just has two dashes? Ideas.

Well they have some crazy system for uploading to the server. When it finishes uploading it works fine except for the writing of the shared object. Does ning.com have the write permissions for flash disabled? Is that possible?
Here is what the client said about the upload process:
"Not yet. Here is what I have done.
1. Click on SWF and then click save to desktop
2.In order to upload SWF to NING platform you have do it through a blog
entry to get its own URL. Once I get that I copy the "http://.... all the
way to .swf" and insert in the script for the flash header in what is called
Analytics. This process has worked fine up until now and appears to load
the new SWF just fine.
3. When I refresh pages or switches tabs it still repeats
4. I have gone into Explorer Internet options and cleared all history but
still no change."
I assumed he was still looking at the old file since it wasn't working but he was looking at the new file with the shared object. Here's a screen shot of the flash privacy settings panel:

CF8 read FMS shared objects

How can I have CF8 Standard (w/out Flex) read a Flash Media Server shared object? I just need to read it; there will be no modifications to the shared object.

I don't think you can.
Mack

Shared Objects: How to store and read multiple instances

Hi,
Can we store multiple instances of Shared Objects in memory and read the desired instance.
e.g
If i execute the below program twice then also it will create only a single instance in the memory.
Can we create a memory object with a key and then read the instance with the object with key
data: handle type ref to ZCL_SHM_AREA_XX,
root type ref to ZCL_SHM_AREA_ROOT_XX.
handle = ZCL_SHM_AREA_XX=>attach_for_write( ).
create object root AREA HANDLE handle.
root->FORM = 'Termination'.
handle->set_root( root ).
handle->detach_commit( ).

Hi Sameer,
check my reply to Recursive methods..
Cheers
Graham Robbo

Large shared objects

Hi,
we think about using ABAP shared objects in parallel processing to avoid reading the same data from the DB for every parallel process.
Currently we have 15MB shared memory configured according to SHMM.
My Questions:
1. How do we extend the shared memory? What is the limit?
2. Does anyone have experience with large shared objects? (1-2GB)
Thanks in advance
regards
Steffen

Hi Steffen,
the parameter is abap/shared_objects_size_MB, the limit is defined by your available memory.
I have seen sizes with 8 GB in production so far.
Regarding the big shared objects: Carefully think about who is reading and writing and when
these actions happen. With versioning you can easily have a much higher memory consumption
since update requests will create a new version while readers attached to the old version
keep the old version alive. Besides that i haven't seen much trouble with shared objects so far,
but maybe other people have other experiences.
Please share your experients with us if you use the shared objects.
Kind regards,
Hermann

Storing Dataprovider in shared object

I'm having trouble storing a dataprovider in a shared object. Writing the dataprovider object to my local shared object seems to work fine, but when I try to read this out of the shared object, it appears to have been transformed into a generic object. When I try to assign a local dataprovider variable to the dataprovider I've read out of the shared object, I get the following error:
"cannot convert Object@3721e6c9 to fl.data.DataProvider"
Any ideas?

you can use:
var mySo:SharedObject = SharedObject.getLocal("test");
if (mySo.data.object0==undefined) {
    var obj1:Object = {name:"kg",title:"md, phd"};
    var obj2:Object = {name:"ck",title:"md"};
    var dp:DataProvider = new DataProvider([obj1,obj2]);
    for(var i:uint=0;i<dp.length;i++){
        mySo.data["object"+i.toString()] = dp.getItemAt(i);
    mySo.flush();
} else {
    var dpA:Array = [];
    for(var s:String in mySo.data){
        dpA.push(mySo.data[s]);
    var dp1:DataProvider = new DataProvider(dpA);

Local Shared Objects and multiple SWFs: mutexes necessary?

I will have multiple SWFs on a single web page, each reading
and writing the same SharedObject, which may be up to 100K in size.
Will I need to create some sort of mutex scheme to ensure that one
SWF isn't writing while another is reading, or do all SWFs on a
page essentially run as a single-threaded application?

>1) I don't think a SharedObject.flush is synchronous.
I believe it is, as long as you're not attempting to write
more data than the user has set for the Local Storage limit.
http://livedocs.adobe.com/flex/3/langref/flash/net/SharedObject.html#flush()
You'll note that flush is described this way: "Immediately
writes a locally persistent shared object to a local file", and if
it returns "SharedObjectFlushStatus.FLUSHED" that means that "The
shared object has been successfully written to a file on the local
disk". So I'd say that the normal operation of flush() is
synchronous. However, the SharedObjectFlushStatus.PENDING state
means that we've exceeded the limit set by the user, and are
waiting for them to allow or disallow it. I believe (strongly) that
that's the only case in which a netStatus event is sent.
Do you read this differently?
As far as multiple SWFs running as cooperative or preemptive
multitasking processes, I'd really like to know the answer, but it
probably doesn't matter. The more I read and think about this, the
more it seems to me that Adobe has to prevent simultaneous reads
and writes to a single Shared Object from taking place, as one use
of it that I've read about is to share data between SWFs. For
example:
http://www.devarticles.com/c/a/Flash/Communication-and-Security-with-the-Flash-Communicati on-Server/1/

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.
Can someone help me?
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 while updating DocumentDefinition AIP-11052:Writing following objects

Hi All,
I am getting this error while updating ecs in Document Definition. I was able to do it properly on the same environment a few weeks back but now its throwing an error:
Error -: AIP-11052: Writing following objects: Document Definition failed due to following constraint violation: DOCUMENTDEFINITION. CAN NOT UPDATE UNVERSIONABLE OBJECT IN A VALIDATED CONFIGURATION
I read in some of the OTN forums that this may be an environment issue. So i restarted the B2B server as suggested but the error seems to still exist.
Kindly reply how to proceed. Its little critical.
Thanks in advance.

Make sure there is no agreement in deployed/validated state which is using this document definition. Retire and purge all existing configurations which are using this doc def and make sure there is no agreement in validated state. If there is an agreement in validated state and then change/just update anything in agreement and save it to bring it back into draft state.
Regards,
Anuj

How to Get property values from Shared Object in client's load event - Very urgent

I am using shared object to share data between two users. First user connect to shared object and set some value in shared object. Please consider that second user has not connected with the shared object yet.
Now when second user connects to the server and try to get that property set by first user, he could get shared object but could not get properties of Shared object set by first user. I observed few times that Second user can get these properties within "Sync" event between two users. But I would like to get these values for Second user in any stage (i.e. in load event etc.). Whenever Second user tries to get the property of Shared object, the object will reset the actual property value and then return reset value.
Anyone faced such issue while using shared object between two users. If so, I would appreciate if you could let me know your suggestions for following questions:
1) Is there any way to get all the properties of shared object before sync event called, as I want to get it immediately when second user connect to the application and perform next task based on the values stored in shared object.
2) Is it possible for second user to check whether any property has been set by first user? So that second user can use the property instead of reset it.
Any kind of help would be greatly appreciated.
Thank You.

I am using shared object to share data between two users. First user connect to shared object and set some value in shared object. Please consider that second user has not connected with the shared object yet.
Now when second user connects to the server and try to get that property set by first user, he could get shared object but could not get properties of Shared object set by first user. I observed few times that Second user can get these properties within "Sync" event between two users. But I would like to get these values for Second user in any stage (i.e. in load event etc.). Whenever Second user tries to get the property of Shared object, the object will reset the actual property value and then return reset value.
Anyone faced such issue while using shared object between two users. If so, I would appreciate if you could let me know your suggestions for following questions:
1) Is there any way to get all the properties of shared object before sync event called, as I want to get it immediately when second user connect to the application and perform next task based on the values stored in shared object.
2) Is it possible for second user to check whether any property has been set by first user? So that second user can use the property instead of reset it.
Any kind of help would be greatly appreciated.
Thank You.

Exception handling is not working in GCC compile shared object

Hello,
I am facing very strange issue on Solaris x86_64 platform with C++ code compiled usging gcc.3.4.3.
I have compiled shared object that load into web server process space while initialization. Whenever any exception generate in code base, it is not being caught by exception handler. Even though exception handlers are there. Same code is working fine since long time but on Solaris x86, Sparc arch, Linux platform
With Dbx, I am getting following stack trace.
Stack trace is
dbx: internal error: reference through NULL pointer at line 973 in file symbol.cc
[1] 0x11335(0x1, 0x1, 0x474e5543432b2b00, 0x59cb60, 0xfffffd7fffdff2b0, 0x11335), at 0x11335
---- hidden frames, use 'where -h' to see them all ----
=>[4] __cxa_throw(obj = (nil), tinfo = (nil), dest = (nil), , line 75 in "eh_throw.cc"
[5] OBWebGate_Authent(r = 0xfffffd7fff3fb300), line 86 in "apache.cpp"
[6] ap_run_post_config(0x0, 0x0, 0x0, 0x0, 0x0, 0x0), at 0x444624
[7] main(0x0, 0x0, 0x0, 0x0, 0x0, 0x0), at 0x42c39a
I am using following link options.
Compile option is
/usr/sfw/bin/g++ -c -I/scratch/ashishas/view_storage/build/coreid1014/palantir/apache22/solaris-x86_64/include -m64 -fPIC -D_REENTRANT -Wall -g -o apache.o apache.cpp
Link option is
/usr/sfw/bin/g++ -shared -m64 -o apache.so apache.o -lsocket -lnsl -ldl -lpthread -lthread
At line 86, we are just throwing simple exception which have catch handlers in place. Also we do have catch(...) handler as well.
Surpursing things are..same issue didn't observe if we make it as executable.
Issue only comes if this is shared object loaded on webserver. If this is plain shared object, opened by anyother exe, it works fine.
Can someone help me out. This is completly blocking issue for us. Using Solaris Sun Studio compiler is no option as of now.

shared object that load into web server process space
... same issue didn't observe if we make it as executable.When you "inject" your shared object into some other process a well-being of your exception handling depends on that other process.
Mechanics of x64 stack traversing (unwind) performed when you throw the exception is quite complicated,
particularly involving a "nearly-standartized" Unwind interface (say, Unwind_RaiseException).
When we are talking about g++ on Solaris there are two implementations of unwind interface, one in libc and one in libgcc_s.so.
When you g++-compile the executable you get it directly linked with libgcc_s.so and Unwind stuff resolves into libgccs.
When g++-compiled shared object is loaded into non-g++-compiled executable's process _Unwind calls are most likely already resolved into Solaris libc.
Thats why you might see the difference.
Now, what exactly causes this difference can vary, I can only speculate.
All that would not be a problem if _Unwind interface was completely standartized and properly implemented.
However there are two issues currently:
* gcc (libstdc++ in particular) happens to use additional non-standard _Unwind calls which are not present in Solaris libc
naturally, implementation details of Unwind implementation in libc differs to that of libgccs, so when all the standard _Unwind
routines are resolved into Solaris version and one non-standard _Unwind routine is resolved into gcc version you get a problem
(most likely that is what happens with you)
* libc Unwind sometimes is unable to decipher the code generated by gcc.
However that is likely to happen with modern gcc (say, 4.4+) and not that likely with 3.4.3
Btw, you can check your call frame to see where _Unwind calls come from:
where -h -lIf you indeed stomped on "mixed _Unwind" problem then the only chance for you is to play with linker
so it binds Unwind stuff from your library directly into libgccs.
Not tried it myself though.
regards,
__Fedor.

Reading a writing Shared Objects

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