Cache database tables at startup

Is there a way to cache certain database tables when starting up the WebLogic 6.1
Server? We are researching if there is a way to do this for our lookup tables
(ex: State, Country, Timezone). We know that an alternative would be to add
these to our JSP pages, but we prefer it be managed in the database.
Thanks in advance for any help provided.

If it's read-only data, you can just cache it in a singleton pattern.
Peace,
Cameron Purdy
Tangosol, Inc.
Clustering Weblogic? You're either using Coherence, or you should be!
Download a Tangosol Coherence eval today at http://www.tangosol.com/
"Adrienne" <[email protected]> wrote in message
news:3c600d66$[email protected]..
>
Is there a way to cache certain database tables when starting up theWebLogic 6.1
Server? We are researching if there is a way to do this for our lookuptables
(ex: State, Country, Timezone). We know that an alternative would be toadd
these to our JSP pages, but we prefer it be managed in the database.
Thanks in advance for any help provided.

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SUP - 2 questions about the CDB (cache database)

Hi,
I have 2 questions about the cache database and the cache groups:
1 - How does the "On demand" cache group policy exactly works? I know that online cache group is without storing any data on the CDB making direct requests to de backend from the device, the DCN is based on updating from the backend, the scheduled is based on a time period, but I don't understand how the "on demand" exactly works, and why it has a time period too.
2 - Is it possible to query the cache database table to check the data that SUP has stored? How can I do this?
Thank you!

I posted a similar question in SUP Apps project not too long ago and Paul Horan provided this useful reply:
Create a "Sybase ASA v12.x for Unwired Server" connection profile in the Enterprise Explorer. I named mine CDB.
: Host = localhost (or whatever the machine name is)
: Port = 5200
: Database name = "default"
: User Name = "dba"
: Password = "sql"
Obviously, change the userid/password to match, if you changed them during install time.
Connect, and you'll see the "default" database displayed.
Navigate down through the Tables folder, and the first subfolder is labeled something like [#should_delete_sk ...] Start there.
You'll see a bunch of tables with the naming convention "D1" + package name + package version + MBO name. These are the cache tables for the MBOs.

After REFRESH the cached object is not consistent with the database table

After REFRESH, the cached object is not consistent with the database table. Why?
I created a JDBC connection with the Oracle database (HR schema) using JDeveloper(10.1.3) and then I created an offline database (HR schema)
in JDeveloper from the existing database tables (HR schema). Then I made some updates to the JOBS database table using SQL*Plus.
Then I returned to the JDeveloper tool and refreshed the HR connection. But I found no any changes made to the offline database table JOBS in
JDeveloper.
How to make the JDeveloper's offline tables to be synchronized with the underling database tables?

qkc,
Once you create an offline table, it's just a copy of a table definition as of the point in time you brought it in from the database. Refreshing the connection, as you describe it, just refreshes the database browser, and not any offline objects. If you want to syncrhnonize the offline table, right-click the offline table and choose "Generate or Reconcile Objects" to reconcile the object to the database. I just tried this in 10.1.3.3 (not the latest 10.1.3, I know), and it works properly.
John

Database cache remote table

Does anyone know if database caching can work with a remote database via a link.
My app server is going to work with an 8i database. Our dba is going to do a dblink to an 8.0.5 database. I want to cache data from the 8.0.5 database to the appserver.
So can I cache a table such as scott.emp@remotedb?
P.S. I can't upgrade the 8.0.5 database quite yet because the application does not allow me to go to 8.1.7.

forgot to mention my email is
[email protected]

CRUD using ADF fails to update database table

Hi All,
I am very new to ADF and JDev. I am using JDev 11.1.1.2.0 and oracle 10g DB.
I have created the required
1. model, view control, Data control files using JDev for a DB table.
2. .jspx file that has a 'panel accordin' and a 'panel formLayout' layouts to display the required table fields on the page.
I am using Panel accordin layout to display the data with navigators buttons and works fine.
In Panel Form layout, after displaying the fields I have added "Submit" button. I have bound this button with "Commit" operation by simple drag and drop.
PS: I have added the fields by simple drag drop of the data control file mapped to the table in question.
On running the page I find things work fine till I want to use the submit button. It just updates the UI front but when I verify in my database table I find that it has not been updated.
I am clueless. Pls guide.
A site with step - by - step end to end development will be very great.
Waiting desparately to get this solved.
Thanks all
Edited by: user8925296 on Jan 16, 2010 2:13 AM

You need to be careful. Submit and committing to the database are two different things.
Submit on a page (and autoSubmit the property) are only posting the changes you typed into the field, back down to the application server. NOTHING is happening with the database at this point. So the applications's internal "cache" of records (using something like ADF BC) is holding the changes but the database doesn't know anything. So if you quit now, no changes will go to the database.
These changes onlyget submitted down to the app server when you do some sort of action like press a button. Simply navigating fields will be doing nothing back to the app server. If you add autoSubmit then you will automatically submit the changes on that field down to the app server when you leave the field (but again, this is not touching the database)
You have to explicitly add a COMMIT operation to save those changes to the database.
Maybe if you try in a simple EMP example and send us your findings we can help direct you further.
Regards
Grant

**urgent*** -two combo boxes -one database table - ***urgent**

1. i have one html page - in that two combo boxes are there
2. first one called--> Bank Name and second one called-->Main Branch
3. i have a database table like BANK_MASTER(MAIN_BRANCH,BANK_NAME)
i am giving here some data for the above table:
(sbi-kurnool, sbi),(sbi-cadapah,sbi),(sbi-chittor,sbi),(ab-rangareddy,ab),(ab-varangal,ab) ..like that every bank has its own main branch in different location.
MY PROBLEM:
In HTML page, in the first combo box ie., Bank Name will display all the bank name using the table BANK_MASTER ie.,sbi,ab,cb,sbh ...... (its ok - i too get )
main Problem: Whenever i select a particular bank name in the first combo box, the second combo box ie.,Main Branch has to display the main branches using the table Bank_Master depending on the Selected bank name from the Bank Name Combo box ( ie., if we select the sbi, it has to display all main branches of sbi's only, but not other bank's main branches)

Hi friend,
I had a similar situation and i tried to solve it by using XmlHttpRequest Object(used in AJAX).
U can checkout the below example just for further reference delete
UserForm.jsp:
==========
<head>
<script>
var xmlHttp
function showState(str)
xmlHttp=GetXmlHttpObject()
if (xmlHttp==null)
alert ("Browser does not support HTTP Request")
return
var url="getState.jsp"
url=url+"?count="+str
url=url+"&sid="+Math.random()
xmlHttp.onreadystatechange=stateChange
xmlHttp.open("GET",url,true)
xmlHttp.send(null)
function stateChange()
if (xmlHttp.readyState==4 || xmlHttp.readyState=="complete"){
document.getElementById("state").innerHTML=xmlHttp.responseText
</head>
<body>
<select name='country' onchange="showState(this.value)">
<option value='india>india</option>
</select>
<br>
<div id='state'>
<select name='state' >
<option value='-1'>pickone</option>
</select>
</div>
</body>
getState.jsp
============
<%@page language="java" import ="java.util.Hashtable" import ="java.util.Set" %>
<%
String country=request.getParameter("count");
response.setContentType("text/html");
response.setHeader("Cache-Control","no-cache");
try{
Hashtable ht = (Hashtable)session.getAttribute("<ATTRIBUTE_NAME>");
String buffer="<select name='state'><option value='-1'>Pick One</option>";
Set s=ht.keySet();
Object keys[]=s.toArray();
int size=keys.length;
for(int i=0; i < size;i++){
buffer=buffer+"<option value='"+ht.get(keys).toString()+"'>"+ht.get(keys).toString()+"</option>";
buffer=buffer+"</select>";
response.getWriter().println(buffer);
catch(Exception exp){
response.getWriter().println(exp);
%> I think u may go upon replacing country with your Main Branch and vice versa

How to keep EJBs and Database Tables in sync ?

Hello dear fellow JDeveloper 11 users,
after i created some EJB 3 entity beans and some offline database table definitions
i would like to get them linked to each other, and to keep them in sync.
where do i do that? cant find it, have i missed it?
thanks for any tips,
thomas
thomas.nagel (at) materna.de

Both questions are not JDev 11 specific and work in JDev 10.1.3.x also.
To keep entities in sync you have tell the underlying orm layer when to refresh its cache. One way for doing this is to use hints in the NamedQueries like this one
                hints =
                { @QueryHint(name = TopLinkQueryHints.REFRESH, value = HintValues.TRUE)Linking EJBs could be easily done (ie automagically during EJB from Tables creation) if the underlying datamodel uses foreign keys relationships.
--olaf

Error in Associating the Oracle Cache Administration user with the Cache Database

hi good eve,
i have done Configuration on the Oracle Database such as
1.create tablespace ttusers
2.running initCacheGlobalSchema.sql
3.creating cache administration user with username cacheadm
4.running grantCacheAdminPrivileges.sql
5.granting object privileges on tables to cacheadm
on Setting Up a Cache Database
i already created cache database my_ttdb
here i created and granted the cacheadm user as admin
then
{code}
Command> connect "dsn=my_ttdb;uid=cacheadm;oraclepwd=cacheadm";
Enter password for 'cacheadm':
Connection successful: DSN=my_ttdb;UID=cacheadm;DataStore=C:\TimesTen\DataStoreP
ath\my_ttdb;DatabaseCharacterSet=AL32UTF8;ConnectionCharacterSet=US7ASCII;DRIVER
=C:\TimesTen\TT1122~1\bin\ttdv1122.dll;LogDir=C:\TimesTen\logs;PermSize=40;TempS
ize=32;TypeMode=0;OracleNetServiceName=XE;
(Default setting AutoCommit=1)
con1: Command> call TTCACHEUIDPWDSET('cacheadm','cacheadm');
5220: Permanent Oracle connection failure error in OCIServerAttach(): ORA-12154
: TNS:could not resolve the connect identifier specified rc = -1
5935: Could not validate Oracle login: uid = CACHEADM, pwd = HIDDEN, OracleNetS
erviceName = XE, TNS_ADMIN = "C:\TimesTen\TNS_AD~1", ORACLE_HOME= ""
The command failed.
{code}
can you please help in solving this problem sir....
thanking you,
prakash

THe main issue is this:
TNS:could not resolve the connect identifier specified rc = -1
TimesTen is not able to resolved the TNS name 'XE'. You need to be sure that (a) your TimesTen instance is correctly configured with the correct value for TNS_ADMIN. This should have been specified at install time but if not you can change it by running ttModInstall as the instance administrator. You will need to shutdown the main daemon and re-start it after making this change. Also, all users who will access Timesten need to have the environment variable TNS_ADMIN, set to the right value, present in their environment.
Chris

5 months rolling monthly report by fetching data from cache & Database

Scenario: One monthly report would be created each month end which contains one summary tab and other details tabs. Summary tabs will contain the data of all the months summary data (current month and previous months)
Problem:
Current month data have to come directly from database and previous months data come form cache and whole thing will be cached this time so that when we run next month report the data till this month will also come from cache.
Any one please help me ASAP.

What's wrong with F_GET_COMPANY_CODE ? Below is similar code - try running this and seeing what you get:
report zlocal_jc_t001w.
tables:
t001k,     "Valuation area
t001w.     "Plants/Branches
parameters:
p_bukrs          like t001k-bukrs default '1000'.
select-options:
s_werks          for t001w-werks.
start-of-selection.
perform get_data.
*&      Form get_data
form get_data.
data:
    begin of gt_t001k occurs 10,
      bukrs             like t001k-bukrs,
      bwkey             like t001k-bwkey,
      werks             like t001w-werks,
    end of gt_t001k.
select
    t001k~bukrs
    t001k~bwkey
    t001w~werks
    into corresponding fields of table gt_t001k
    from t001k as t001k
    inner join t001w as t001w on t001w~bwkey = t001k~bwkey
    where t001k~bukrs = p_bukrs
    and   t001w~werks in s_werks.
loop at gt_t001k.
    write: /
      gt_t001k-bukrs,
      gt_t001k-bwkey,
      gt_t001k-werks.
endloop.
endform.                    "get_data
As for links to locally defined database tables, that will depend on what the keys defined in SE11 are e.g. there will be a primary key plus relationships to other tables (for example "WERKS LIKE YSDA_EXP_PRTLOG-YY_PLANT" indicates YY_PLANT relates to T001W).
Jonathan

Access is not inserting, updating or deleting records in my database table on the server

I am having a problem with an application I developed using Dreamweaver 8 and Access 2000 several years ago which is no longer working correctly. The problem is that Access is not inserting, updating or deleting records in my database table on the server but is reflected in changes to my Web site. I used the Dreamweaver server behaviors: insert record, update record and delete record to make the changes to my Access table on the server. My Access table on the server shows all of the records I inserted or updated in the past, but not any of the newly inserted on updated records.
does any one have any ideas as to what my problem is?
Jim

No, that has nothing to do with your problem. Let's make sure I understand the symptoms.
1) Your site is online at a remote host.
2) You use a dynamic page in your online site to update a database record (insert, delete, or update)
3) The update then appears correctly on your dynamic content page.
4) You download the mdb and it appears to not have any of the upates you just made.
Please correct any of these statements if they are wrong.
If the above is correct, then you must be looking at a cached mdb, or the mdb you are looking at is in the wrong location. Do this: search your entire drive for copies of the mdb, including in the Windows temp directories which is likely where the cached copy is located. Delete any extra copies and download again.

Cache 1000 tables at a time?

hi,
i want to cache 1000 tables at a time.
how can i cache ? it could be either AWT or SWT
thanx in advance
:)

TimesTen is a database. It supports creation of 1000s of tables. For caching, tables are encapsulated within cache groups. You can create throusands of cache groups. You are not limited to one cache group and one table; that would not be a very useful product :-)
I would recommend that you read the very good Introduction and Cache User's Guides to be found here: http://docs.oracle.com/cd/E21901_01/welcome.html
They explain the basic concepts related to using TimesTen as a cache as well as lot of other more in-depth information. Once you have done that tyou may then have other questions that the forum can help you with.
Regards,
Chris

CACHE Oracle Tables

Hello Gurus,
We are building a new application and identified that few tables will be accesses very frequently. To decrease I/O we are planning to CACHE these tables. I am not sure if we made right decision. My question what are the things you need to consider before caching Oracle tables.
Any help greatly appreciated. Thanks.
select * from V$VERSIONBANNER
Oracle Database 11g Enterprise Edition Release 11.2.0.3.0 - 64bit Production
PL/SQL Release 11.2.0.3.0 - Production
CORE     11.2.0.3.0     Production
TNS for IBM/AIX RISC System/6000: Version 11.2.0.3.0 - Production
NLSRTL Version 11.2.0.3.0 - Production

OK, so you want to use multiple buffer pools and to put these tables into the keep pool?
Why do you believe that this will improve performance? Oracle's default algorithm for aging out blocks that are seldomly used is pretty good for the vast majority of applications. Why do you believe that you can identify what blocks will most benefit from caching better than Oracle? Why do you believe that you wouldn't be better off giving whatever KEEP pool cache size you would allocate to the DEFAULT pool and letting Oracle's cache algorithm cache whatever it determines is appropriate? It is possible that there is something that you know about your application that allows you to make this sort of determination. But in the vast majority of cases I've seen, people that have tried to do so end up hurting performance at least a little because they're forcing Oracle at the margin to age out blocks that it would benefit from caching and to cache blocks that it would benefit from aging out.
Do you understand the maintenance impact of using multiple buffer caches? If you are using a vaguely recent version of Oracle and using any of the automatic memory management features, Oracle does not automatically manage the non-default buffer caches. That increases the probability that using non-default buffer caches is going to create performance problems since humans are much less efficient at recognizing and reacting to changing memory utilization and substantially increases the amount of monitoring and work that the DBAs need to do on the system (which, in turn, increases the risk that they make a mistake).
Justin

Reg:How to delete the column in table control also from database table.

Hi Experts,
Once again thank u all for giving the responses.
one more doubt is how to delete the columns of table control and also the record shold delete from ztable.
With Regards,
Saroja.P.

Hi,
If you want to delete the rows in the table control and simultaneously delete it from the database table, then you can implement a 'DELETE' functionality specific to your table control. Have a MARK field (you will find that in the screen attributes of the table control -> give a name for the MARK field, you will find an additional MARK column at the beginning of your table control). You can check whatever rows you want to delete from the table control, call the delete module.
"This portion of code inside the LOOP...ENDLOOP.
IF sy-ucomm eq 'F_DELETE'.
gt_itab2-check = mark. " Store the MARK field status into your internal table's correspoding field 'check'
MODIFY gt_itab INDEX tabcontrol-current_line.
ENDIF.
iF sy-ucomm eq 'DELETE1'.
DELETE gt_itab WHERE check eq 'X'. "Your internal table does not have rows that you want to delete
ENDIF.
Now you can modify your database table using the MODIFY statement.
MODIFY ZDB FROM TABLE gt_itab.

Help needed in reading text file to database table

Hello experts,
i have to insert the values from the column of this text file and insert them in my database table.
I have done a few file to table insertions but i'm having some trouble with this one.
Any suggestions plz
thanks
liab_report      1.00                                                                                                                              Page: 1
CDC:00537 / Mon Jun-21-2010                           LIABILITY REPORT                               Mon Jun-21-2010 22:06:26
DRAW    1; SET    1; November 7, 2009
                     TOTAL       PAID ON         TOTAL    EXPIRED ON         TOTAL    FRAC   OUTSTANDING
                   WINNERS      06/21/10          PAID      06/21/10       EXPIRED   ROUND
DIVISION          AMOUNT        AMOUNT        AMOUNT        AMOUNT        AMOUNT AMOUNT        AMOUNT
    Div1              0.00          0.00          0.00          0.00          0.00    0.00          0.00
    Div2         701040.00          0.00     660146.00          0.00      40894.00    0.00          0.00
    Div3        1444128.00          0.00    1330056.00          0.00     114072.00    0.00          0.00
    Div4        4711900.00          0.00    3889700.00          0.00     822200.00    0.00          0.00
                6857068.00          0.00    5879902.00          0.00     977166.00    0.00          0.00
DRAW    2; SET    1; November 14, 2009
                     TOTAL       PAID ON         TOTAL    EXPIRED ON         TOTAL    FRAC   OUTSTANDING
                   WINNERS      06/21/10          PAID      06/21/10       EXPIRED   ROUND
DIVISION          AMOUNT        AMOUNT        AMOUNT        AMOUNT        AMOUNT AMOUNT        AMOUNT
    Div1              0.00          0.00          0.00          0.00          0.00    0.00          0.00
    Div2         817817.00          0.00     817817.00          0.00          0.00    0.00          0.00
    Div3        1687405.00          0.00    1611742.00          0.00      75663.00    0.00          0.00
    Div4        3402100.00          0.00    3034200.00          0.00     367900.00    0.00          0.00
                5907322.00          0.00    5463759.00          0.00     443563.00    0.00          0.00
DRAW    3; SET    1; November 21, 2009
                     TOTAL       PAID ON         TOTAL    EXPIRED ON         TOTAL    FRAC   OUTSTANDING
                   WINNERS      06/21/10          PAID      06/21/10       EXPIRED   ROUND
DIVISION          AMOUNT        AMOUNT        AMOUNT        AMOUNT        AMOUNT AMOUNT        AMOUNT
    Div1              0.00          0.00          0.00          0.00          0.00    0.00          0.00
    Div2         779933.00          0.00     769804.00          0.00      10129.00    0.00          0.00
    Div3        1605548.00          0.00    1525104.00          0.00      80444.00    0.00          0.00
    Div4        4891700.00          0.00    4256800.00          0.00     634000.00    0.00        900.00
                7277181.00          0.00    6551708.00          0.00     724573.00    0.00        900.00

Plz clarify whether u want to load text file as a file into database or value of this text file into database. If values are to be loaded from this text file, U can better format the text file and use SQL loader to load the file into database. By formatting the database, i mean remove the unnecessary headings and characters, kee only the values to be loaded idelimited by ' '(space) or ','(comma). Create a control file and load it into the target table.

Displaying data in a tree from database table

Hi,
I want to display data from a database table (mara-matnr) in a tree structure. I went through the coding of SBSPEXT_HTMLB. There static data was taken in to wa_tab. But there I want to bring data from a database table into wa_tab. For this I created an internal table without headerline by taking a work area, now how can I move data from this work area to wa_tab record by record.
I hope some one might have worked on this. Plz help me....
Thanks in advance,
Ravindra.

Hi,
take a look at this <a href="/people/tomas.altman/blog/2004/12/13/sdn-blog-how-to-do-internal-tables-in-bsp which explains how internal tables work in ABAP OO.
Furthermore I think you want to do this:
insert <yourWorkarea> into table wa_tab.
A complete mara example would be:
data tab_mara type table of mara.
data wa_mara type mara.
select * from mara into table tab_mara.
*or you can use:
select * from mara into wa_mara.
insert wa_mara into table tab_mara.
endselect.
regards
Thomas

Cache database tables at startup

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