Enforce filtering from EO Cache

I have a entity based view object which shows Data in a adf read only table.
On page load some Data will be shown and will be part of the EO Cache.
When a change happens on database side, i dont want this to reflect in the Cache. It should be possible to filter only from the cache, unless a refresh operation will be done (refreshing (iterating VO) the hole page, not requery).
Anyone an idea?
Thanks.

Hello Jabr,
thank you for the repsone.
in the post is telling: "The executeQuery visited the database every time it is executed even if the user made no changes on the JSF"
What in case, the view criterias "query execution mode" is set to "In memory" (using RowMatch)?
I am not using execute_query explicitly. Let me try to explain what I am doing in Application.
Just to make use of the EO Cache mechanism, i create a EO Object which is not referencing to a DB Schema Object (Non existing Object) and create a View Object with the specific Query (keep the referenz of EO and VO Attributes).
When i query particular rows, and do a change on databse side, ADF throws an exception telling that DB Object is not existing.
Only when the column will not be persistent, then directly changed DB Value will be retrieved and shown, without errors. But i want to keep the Cache, until i again iterate through the View Object and execute query.
Maybe someone tell me another way to achieve this requirement.
Thank you!
Using JDEV 11.1.1.3
DataSource: MySQL 5.0.27

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Getting All Entries from a cache

Hi Folks,
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     Max

Hi Gene,
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     In some cases (typically with caches having a low cache-size) we found, that the entrySet-AlwaysFilter solution was way faster than the keyset-getall solution, which was about as fast as the solution iterating over the cache (new HashMap(cache)).
     I just wanted to ask if there are some rules of thumb on how long is it efficient to use the AlwaysFilter on distributed caches, and where it starts to be better to use the keyset-getall approach (from a naive test-case keyset-getall seemed to be better upwards from a couple-of-thousand entries).
     Also, as we are considering to move some of the caches (static data mostly, with usually less than 1000 entries, sometimes even as few as a dozen entries in a named cache, and in very few cases as many as 40000 entries) to a replicated topology, that is why I asked about the effect of using replicated caches...
     I expect the entrySet-AlwaysFilter to be slower than the iterating solution, since it effectively does the same, and also has some additional filter evaluation to be done.
     The keySet-getall will be something similar to the iterating solution, I guess.
     What is to be known about the implementation of the values() method?
     Can it be worth using in some cases? Does it give us an instant snapshot in case of replicated caches? Is it faster than the entrySet(void) in case of replicated caches?
     Thanks and best regards,
     Robert

Any way to retrieve this image from my cache? When saved it only saves as a 1.7KB blank file.

I'm trying to retrieve an image from Firefox's cache but so far have had no luck in doing so. The picture was hosted on imageshack and I had it open in a window but when I refreshed the page several hours later it was gone. I refreshed the page several more times, tried messing with the url to see if that did anything, but no luck. I haven't cleared anything on Firefox so I'm hoping there's some way I can recover it from the cache.
I followed the instructions on this page: http://groups.google.com/group/mozilla.support.firefox/msg/73bab3fb55ac5b42
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Hi.
Once the image in question is replace with another one, the old one is erased. That is to say, if you open an image, say www.domain.com/image.png, and it's a 200x200 image, then you close it, it's still on cache, and you can access it through the cache. But if the image is changed in the server, that same exact url, and you access it again, at you see a 250x200 image (just an example), then the 200x200 is gone forever.
Your hope is that you never accessed the same URL again, so the old cache wasn't erased. If you know the url of the image, simply select offline mode (File > Work Offline, I think) and access its url. It will load the cached version and not check for the online one. Only if there is a cached version, of course.
I hope this helps.

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Why I can no longer save videos (*.flv) from my cache folder?

Well, I don't speak English.
I'm sorry.
Até o Firefox 3.6.16 eu conseguia salvar um vídeo (*.flv), do Youtube por exemplo, a partir da pasta cache. Por que não posso mais fazê-lo no Firefox 4.0?
A partir disso, desinstalei o Firefox 4.0, voltei para o antigo. E quando não puder mais usar a versão 3.6.16 passarei a usar o IE, já que na versão 8.0.6001.18702 ainda consigo fazer o salvamento de vídeos.
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Hi All,
I got a problem to provisioning on Shared Service.
In some case, I need to grant multiple filters to a Essbase users, say user01.
However, each user can associated one Essbase filter only.
For better management, I create multiple groups with different filters and assign the user, user01, into the groups.
For first two groups are working normally. However, Essbase cannot "union" all filters from multiple groups after the users join the third groups.
However, I try to combine the three filter into a filter with three rows. It is working!!!
It is because there are large number of users in external LDAP. It is unmanageable when combining multiple filters into a filters. Is there any way to solve this problem? or is there any better approach to do the security ?
Thanks in advance!!!
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TKC

Thanks for your reply.
I have following structure in Essbase. I try to make it simple to understand.
Dept (dimension)
|_C00
|_CTTL
|_C01
|_C02
Project (dimension)
|_GEN
|_P01
|_P02
|_P03
|_PI
|_A
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|_B
|_P02 (shared member)
|_P03 (shared member)
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Read - CTTL, IDESCENDENT(A)
Group B with Filter F02
Read - C01, P01, P02
User joins A and B group.
The end result of user is that
he can access CTTL of P01 only
he can access C01 of P01 and P02 only
he cannot access C02 of any Project dimension
he cannot access CTTL of P03
However, I found that when I change to metaread. The result is going wrong.
he can access C01 of P01, P02 and P03 only.
It is because I need to block user to view members which he cannot access.
I need "metaread" function.
So somebody tell me how to achieve this? Thanks in advance.
Edited by: user070322 on Jan 4, 2009 8:37 PM
Edited by: user070322 on Jan 5, 2009 6:04 PM

Data fetch from live cache

How can I retrieve data from live cache?This is in Demand Planning : SCM APO.
Please suggest ways.
Thanks & Regards,
Savitha

Hi,
some time ago I worked on SAP APO.
To read live cache, you first have to open a SIM session.
You can do this as shown in this function module:
FUNCTION ZS_SIMSESSION_GET.
*"*"Local Interface:
*" IMPORTING
*"     REFERENCE(IV_SIMID) TYPE /SAPAPO/VRSIOID
*" EXPORTING
*"     REFERENCE(EV_SIMSESSION) TYPE /SAPAPO/OM_SIMSESSION
CONSTANTS:
lc_simsession_new       TYPE c LENGTH 1 VALUE 'N'.
DATA:
lt_rc                   TYPE /sapapo/om_lc_rc_tab,
lv_simsession           LIKE ev_simsession.
IF NOT ev_simsession IS INITIAL.
    EXIT.
ENDIF.
*--> create Simsession
CALL FUNCTION 'GUID_CREATE'
    IMPORTING
      ev_guid_22 = lv_simsession.
*--> create transactional simulation
CALL FUNCTION '/SAPAPO/TSIM_SIMULATION_CONTRL'
    EXPORTING
      iv_simversion            = iv_simid
      iv_simsession            = lv_simsession
      iv_simsession_method     = lc_simsession_new
      iv_perform_commit        = space
    IMPORTING
      et_rc                    = lt_rc
    EXCEPTIONS
      lc_connect_failed        = 1
      lc_com_error             = 2
      lc_appl_error            = 3
      multi_tasim_registration = 4.
IF sy-subrc > 0.
    CLEAR ev_simsession.
*   error can be found in lt_rc
ENDIF.
* return simsession
ev_simsession = lv_simsession.
ENDFUNCTION.
Then you can access the live cache.
In this case we read an order (if I rememver correctly, it's a plan order):
DATA:
lv_vrsioid                  TYPE /sapapo/vrsioid,
lv_simsession           TYPE /sapapo/om_simsession.
* Get vrsioid
CALL FUNCTION '/SAPAPO/DM_VRSIOEX_GET_VRSIOID'
    EXPORTING
      i_vrsioex_fld = '000' "By default
    IMPORTING
      e_vrsioid_fld = lv_vrsioid
    EXCEPTIONS
      not_found     = 1
      OTHERS        = 2.
CALL FUNCTION 'ZS_SIMSESSION_GET'
      EXPORTING
        iv_simid      = iv_vrsioid
      IMPORTING
        ev_simsession = lv_simsession.
CALL FUNCTION '/SAPAPO/RRP_LC_ORDER_GET_DATA'
    EXPORTING
      iv_order      = iv_orderid
      iv_simversion = iv_vrsioid
    IMPORTING
      et_outputs    = lt_outputs
      et_inputs     = lt_inputs.
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You can do this like that:
* Merge simulation version (to commit order changes)
CALL FUNCTION '/SAPAPO/TSIM_SIMULATION_CONTRL'
    EXPORTING
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      iv_simsession                = lv_simsession
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      lc_com_error                 = 2
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I hope this helps...

How to remove blocks from buffer cache for a specific object

hi everybody,
is it possible to remove blocks which belogns to a specific object (a table for ex) from buffer cache.
as you know, there is
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ps: I use oracle 11g r2

Hi mustafa,
Your performance will not degrade if you run the query second time ( if i understood correctly, you worry about the performance if you execute the procedure second time). Executing/running the code/sql statements over and over again will have following two good benefits.
1) This will avoid hard parsing (Hard parsing is resource intensive operation and this generally increase the overall processing time.
2) This will avoid physical read IO (You gonna see the benefits if data blocks already cached and you dont have to spend time in reading blocks from disk. Reading from disk is much costlier and time consuming operation as compared to data in RAM)
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Regards
Edited by: 909592 on Feb 6, 2012 4:37 PM

Does coherence cache the value from the cache?

Hi, I have the question about if the coherence caches the value from the cache? I believe it does from my test, just want to get the confirmation.
I like to use an example to describe my question. For example:
If (key1, value1) are in the cache1, (value1 is an object),
for the first time, if cache1.get(key1), coherence will deserialize value1 and return. But if in the same JVM, when cache1.get(key1) is invoked again, coherence will return value1, which I believe is cached by coherence in the current JVM, and return; instead of deserializing and return it. Is that right?
I am asking this question because I found a problem in our project when use coherence. As the above example, if I use value1 = cache1.get(key1), and in our project, value1 object has a set method to change one of its internal attributes, and this method was indeed invoked after value1 get from cache1. Then in another class, value2 = cache1.get(key1) is called again, and I found out that value2's attribute will have the modified value, even cache1.put(key1, value1) is never invoked in the first place.
Of course, this kind of behavior matches the java.util.Map. But coherence cache is a cluster/distributed environment. In the above example, if on another data node, value3 = cache1.get(key1) will get the original attribute value in value3, since the deserialize object will always get the original value, unless the new value is put in explicitly by cache1.put(key1, value1).
In this case, should cache1.get(key1) always return a clone object make more sense?
Thanks

You observation is correct. More specifically for cache topologies which include an in-process cache Coherence may return the same object reference for repeated get requests on the same key. I say "may" because for any variety of reasons we may also have to retrieve a fresh copy from a remote cache server. When possible we will return existing objects for performance reasons avoiding costly things like network hops, and de-serialization. Any modifications made to an object returned from the cache will not be made automatically available to other cluster members. Additionally if these modifications are made concurrently with another thread performing a cache.put() on the same value could result in a corrupt cached value if your serialization methods are not thread-safe. Best practice dictates that unless you are sure that you are using a cache topology which does not include an in-process cache that you treat the values returned from the cache as immutable, and instead deep clone() it before making any modifications.
The distributed-scheme and remote-scheme are the only types of caches which do not include in-process caching, and thus always return "mutation safe" values. The most common in-process cache topology is near-scheme, but others include replicated-scheme, optimistic-scheme, local-scheme, and the programatically created ContinuousQueryCache.
thanks,
mark

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Thanks!

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Hi everyone,
I would like to export the security filters from our reporting application which is ASO. Through my research I have struggled to find a good method for doing this. I ran the Display Filter MAXL script to produce an output but the output cannot be manipulated for use.
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http://john-goodwin.blogspot.com/

Enforce filtering from EO Cache

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