Preload DB tables into Coherence Cache using HibernateDataStore

Hi,
I am trying to use Hibernate just to pre-load my database tables [reference data with millions of rows] into coherence cache [as pojos]. I started looking at the configuration file from the below link -
http://coherence.oracle.com/display/COH35UG/Using+Hibernate+as+a+CacheStore+for+Coherence
and could not grab much from there.
Can someone plz provide clean steps on how i can use hibernate to pre-load my database tables into coherence. An example with pojo would be very helpful?
Thank You,
Jagadeesh.

Hi, Steve
Thanks for the information. I did look at the document regarding CacheLoader and read-through and read-ahead.
I have the question based on the above info.
1. Currently I am using Built-in CacheStore implementation: JPA CacheStore.
Here is the configuration in persistance.xml.
<backing-map-scheme>
<read-write-backing-map-scheme>

<internal-cache-scheme>
<local-scheme/>
</internal-cache-scheme>
<cachestore-scheme>
<class-scheme>
<class-name>com.tangosol.coherence.jpa.JpaCacheStore</class-name>
<init-params>
JpaCacheStore extends JpaCacheLoader and implments CacheStore interface.
so in JpaCacheLoader, it has load and loadAll method implementation.
Can I confirm in my case, i shouldn't do anything else regarding the read-through?
Cheers
Julia

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Hi expert
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Hi,
Please refer this how to guide which may give some idea for creation formula:
http://www.pioneerb1.com/wp-content/uploads/2012/04/How-to-work-with-Crystal-Reports-8.8.pdf
Thanks & Regards,
Nagarajan

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Note : Not Tested.
DECLARE
V1 VARCHAR2(32767);
F1 UTL_FILE.FILE_TYPE;
cursor c1 is select ename,empno from emp;
r_c1 c1%rowtype;
BEGIN
-- In this example MAX_LINESIZE is less than GET_LINE's length request
-- so the number of bytes returned will be 256 or less if a line terminator is seen.
open c1;
F1 := UTL_FILE.FOPEN('MYDIR','MYFILE','W',256);
loop
fetch c1 into r_c1;
v1:= r_c1.ename||''||To_char(r_c1.empno);
UTL_FILE.PUT_LINE (F1, v1,TRUE);
v1:= null;
Exit when c1%not found;
end loop;
UTL_FILE.FCLOSE(F1);
END;
http://download.oracle.com/docs/cd/B19306_01/appdev.102
------------------------------------------------------------------

How to paste a Word table into email without showing the guidelines.

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BigEnd wrote:
When pasted from Word, the graphics are Inline by default. You can correct each one by selecting the graphic and then Anchored Object, Options and selecting Above Line (centered etc). What I do then is create an object style to these specs and this makes it quicker to apply to the graphics.
You say that there are very many graphics in the doc - does anyone know how to make the above settings the default when graphics are pasted from Word?
M
Thank you M, but I believe I figured it out:
I made styles in Word to make things a bit simpler when changing large sections of text, so within the settings of the images style select Format>Paragraph>Line and Page Breaks. Under 'Textbox Options' the Tight wrap defaults to 'None' - Select 'All'.
When the file is placed into InDesign, the images don't overlap, and are exactly where they need to be.

How do we put an object in coherence cache when the pk is using @TableGener

Hi,
I am trying to create a sample application using Spring, JPA, Eclipselink, Coherence. I am trying to insert objects into cache and then expecting it to persist into database asynchronously. The issue is we are using @TableGenerator to generate pk. I dont have the primary key before hand to use it to put the object into the cache.
Ex: cache.put(???, object);
What is the best approach in such scenarios. Can anyone point me to an example?
Thanks.

user12107940 wrote:
The above article helps but we can't change the current architecture of generating the primary key i.e., TableGenerator. We have other non-java processes that update the database. Is there any other way to use jpa-eclipselink to know the pk before persisting the object.In this case you have to ensure that anything which comes via Coherence gets ids from a set of possible ids which is distinct from the set of possible ids generated in the database, but it is technically impossible to put something in a cache without an id already generated if the id is part of the primary key (and you want it to be).
E.g. whatever generates ids in the database must only generate odd numbers for ids (e.g. a sequence which increases not with one but with two), and whatever goes via JPA/EclipseLink must only generate even numbers.
Best regards,
Robert

Why I need the same pof conf on client+srver if Coherence is used as cache?

Hi,
I have first defined my own pof-config.xml only on my client.
And Coherence wrote me a very ackward msg: "StreamCorruptedException unknown user type 6" !!!????
I have made another try, while defining my own pof-config.xml on my servers too !
Then, Coherence has worked smoothly, as expected.
QUESTION: as I use Coherence as a cache, using no index, no EP... I expect Coherence is not going to dig into my byte[] for the 'server' nodes.
Then, I expect only the clients have to serialize/deserialize, I expect they send the byte[], and the servers store only them, that is, without needing any pof config.
If it works as I have written, why Coherence is not working ("StreamCorruptedException unknown user type 6"), if I define my own pof-config.xml only on my client ?
Thanks.
Regards,
Dominique

Hi Dominique,
user4947403 wrote:
Hi Robert,
robvarga wrote:
Hi Dominique,
Coherence does not know what you will do with the data. It has to assume that you may want to send an entry-processor or entry aggregator or query the items with a filter, or you may simply want to get the item from the cache WITHIN the cluster not only via Extend. imho, I feel it as counter-intuitive.
I have expected something like: as far as no EP is run, no pof config is searched+if no pof config exists in order to deserialize when needed, raise an exception.
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2. If some data travels across the proxy connection, it has to travel in the serialization format configured for the proxy service. If you put data into a cache, it has to travel on the network in the serialization format configured for the cache service of the cache. Period.
If this rule was not followed, Coherence would not know what serialization format any piece of data has. Therefore as mentioned below, if the proxy service serialization configuration differs from the cache service serialization configuration, data has to be de- and reserialized on the proxy.
Again, imagine the case if your logic were followed: Just because you used some service to put data into the cache, Coherence cannot know that you will use the same service to get the data back. If some code inside the cluster tried to deserialize it, it would fail as it has no idea, that it was serialized with the proxy serialization format. It actually doesn't even have an idea that the data came from the proxy, or even that there is a proxy. Also, if you used some other code to put data into the cache which is not coming via the proxy, you would have another piece of data sitting in the cache which was not serialized by the proxy serialization format. If you tried to retrieve that via the TCP*Extend, you could not deserialize it on the client as it is not in the serialization format used by the proxy. Moreover, the client does not even have any chance of even knowing what it was serialized with as the client does not even see the serialization configuration of services inside the cluster.
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Best regards,
Robert

Inserting data from one table into another table using PL/SQL

HI,
I am trying to insert values from one table into another using PL procedure, the values I want to retrieve from the table riverside1 are charac_id and charac_type and insert these values into another table called riverside2 , the stored procedure zorgs_gorfs(x,y) accepts two parameters which are 2 charac_id's of d characters in riverside1 then using insert statements inserts these characters from riverside1 into riverside2.
CREATE OR REPLACE PROCEDURE zorgs_gorfs(x IN NUMBER, y IN NUMBER) AS
     BEGIN
          INSERT INTO riverside2
               (charac_id)
          VALUES
               (x);
INSERT INTO riverside2
               (charac_id)
          VALUES
               (y);
      END zorgs_gorfs;
/This works but the problem im having is that when I also try to insert the charac_type as well as the charac_id it doesnt work below is the code:
CREATE OR REPLACE PROCEDURE zorgs_gorfs(x IN NUMBER, y IN NUMBER) AS
     BEGIN
          INSERT INTO riverside2
               (charac_id,charac_tye)
          VALUES
               (Select
                    charac_id,
                    charc_type
               FROM
                    riverside1
               WHERE
                    charac_id = x);
      END zorgs_gorfs;
/can someone kindly sort me out

modify this sql
INSERT INTO riverside2
               (charac_id,charac_tye)
          VALUES
               (Select
                    charac_id,
                    charc_type
               FROM
                    riverside1
               WHERE
                    charac_id = x);as
INSERT INTO riverside2
               (charac_id,charac_tye)
          VALUES
               (Select
                    charac_id,
                    charc_type
               FROM
                    riverside1
               WHERE
                    charac_id in ( x,y));But my suggestion would be consider revising your approach. It does not look that good.
Thanks,
karthick.

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I want to insert data into a database table from JSP page using Entity Beans(EJB 3.0).
1. I have a table 'FRIENDS', (in Oracle 10g database).
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5. I am using JDev as editor.
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Thank you.
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Hi,
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I got an error on trying to insert a row into a table with identity column using cfgrid on change see below
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update table (xxx,xxx,xxx)
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        <cfset var colname="">
        <cfset var value="">
        
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            <cfcase value="U">
                
                <cfset colname=StructKeyList(ARGUMENTS.gridchanged)>
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                <cfset colname=StructKeyList(ARGUMENTS.gridchanged)>
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mediatypeid primary key,identity
mediatypename
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            bind="cfc:sp3.testing.MediaType.cfn_MediaType_All
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            <cfgridcolumn name="MediaTypeName" header="Media Type" />
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http: Error invoking xxxxxxx/MediaType.cfc : Element '' is undefined in a CFML structure referenced as part of an expression.
{"gridaction":"I","gridrow":{"MEDIATYPEID":"","MEDIATYPENAME":"uuuuuu","CFGRIDROWINDEX":4} ,"gridchanged":{}}
Thanks

Is this with the Travel database or another database?
If it's another database then make sure your columns
allow nulls. To check this in the Server Navigator, expand
your DataSource down to the column.
Select the column and view the Is Nullable property
in the Property Sheet
If still no luck, check out a tutorial, like Performing Inserts, ...
http://developers.sun.com/prodtech/javatools/jscreator/learning/tutorials/index.jsp
John

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Hi,
I am loading the metadata into epma applications using interface tables as ODI dont perit to load metadata into epma applications. Is there any way of using ODI and interface tables together to load the metadata
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Hi,
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http://john-goodwin.blogspot.com/

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Getting error when I try to pass the PL/SQL table into USING clause in EXECUTE IMMEDIATE statment:
Declare
result NUMBER;
TYPE values_tab IS TABLE OF NUMBER INDEX BY BINARY_INTEGER;
lv_tab values_tab;
lv_exp varchar2(300);
lv_exec varchar2(300);
BEGIN
lv_tab(1) := 5;
lv_tab(2) := 48;
lv_tab(3) := 7;
lv_tab(4) := 6;
lv_exp := ':b1+:b2+(:b3*:b4)';
lv_exec := 'SELECT '||lv_exp ||' FROM DUAL';
EXECUTE IMMEDIATE
lv_exec
INTO
result
USING
lv_tab;
DBMS_OUTPUT.PUT_LINE(result);
END;
Error at line 1
ORA-06550: line 20, column 12:
PLS-00457: expressions have to be of SQL types
ORA-06550: line 15, column 8:
PL/SQL: Statement ignored
I am trying to evaluate the expression ":b1+:b2+(:b3*:b4)" which is stored in table. This table has different expressions (around 300 expressions). I want to use the bind variables in expression because each expression evaluated thousand of time may be more in some case. If I don't use bind variable then it fill shared pool.
Is there any way I can pass the USING (IN) parameters dynamically instead of writing "USING lv_tab(1), lv_tab(2), lv_tab(3), lv_tab(4)"? As number of input parameters change depend on the expression in the table.
If not possible please suggest any other ideas/approches
Please help..
Edited by: satnam on Jun 11, 2009 11:50 AM

Well, you keep changing reqs faster I can keep up. Anyway, assuming N-th bind variable (left-to-right) corresponds to collection N-th element:
Declare
    result NUMBER;
    lv_tab values_tab := values_tab();
    lv_exp varchar2(300);
    lv_exec varchar2(300);
    lv_i number := 0;
BEGIN
    lv_tab.extend(4);
    lv_tab(1) := 5;
    lv_tab(2) := 48;
    lv_tab(3) := 7;
    lv_tab(4) := 6;
    lv_exp := ':5000135+:5403456+(:5900111*:5200456)';
    lv_exec := lv_exp;
    While regexp_like(lv_exec,':\d+') loop
      lv_i := lv_i + 1;
      lv_exec := REGEXP_REPLACE(lv_exec,':\d+',':b(' || lv_i || ')',1,1);
    end loop;
    lv_exec := 'BEGIN :a := ' || lv_exec || '; END;';
DBMS_OUTPUT.PUT_LINE(lv_exec);
EXECUTE IMMEDIATE lv_exec USING OUT result,IN lv_tab;
DBMS_OUTPUT.PUT_LINE(result);
END;
BEGIN :a := :b(1)+:b(2)+(:b(3)*:b(4)); END;
95
PL/SQL procedure successfully completed.
SQL> SY.

How to join THREE different tables into internal table using one select statement .

How to join THREE different tables into internal table using one select statement .
Hi experts,
I would like to request your guidance in solving the problem of joining the data from three different database tables into one internal table
Scenario:
Database tables:
SPFLI
SFLIGHT
SBOOK.
Table Fields:
SPFLI - CARRID CONNID COUNTRYFR CITYFRM COUNTRYTO CITYTO
SFLIGHT - CARRID CONNID FLDATE SEATSMAX SEATSOCC SEATSMAX_C
SEATSOCC_C SEATSMAX_F SEATSOCC_F
SBOOK - CARRID CONNID CLASS
MY INTERNAL TABLE IS IT_XX.
Your help much appreciated.
Thanks in advance.
Pawan.

Hi Pawan,
please check below codes. hope it can help you.
TYPES: BEGIN OF ty_xx,
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        connid     TYPE spfli-connid   ,
        countryfr TYPE spfli-countryfr,
        cityfrom   TYPE spfli-cityfrom ,
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        seatsocc_b TYPE sflight-seatsocc_b,
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        class      TYPE sbook-class,
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      t_xx TYPE STANDARD TABLE OF ty_xx.
DATA: it_xx TYPE t_xx.
SELECT spfli~carrid
       spfli~connid
       spfli~countryfr
       spfli~cityfrom
       spfli~countryto
       spfli~cityto
       sflight~fldate
       sflight~seatsmax
       sflight~seatsocc
       sflight~seatsmax_b
       sflight~seatsocc_b
       sflight~seatsmax_f
       sflight~seatsocc_f
       sbook~class
INTO TABLE it_xx
FROM spfli INNER JOIN sflight
ON spfli~carrid = sflight~carrid
AND spfli~connid = sflight~connid
INNER JOIN sbook
ON spfli~carrid = sbook~carrid
AND spfli~connid = sbook~connid.
Thanks,
Yawa

How to Seed Cache using Event Polling Table

Hello Experts
I Have configured Event Polling Table in my PC
Steps :
1) Created table using SAEPT.Oracle.sql schema in 10g
2) Imported SAEPT.Oracle.sql by creating an new connection pool in Physical Layer
3) Configured in Repository - Tools - Utilities - OBI Event Polling Tables by selecting SAEPT.Oracle.sql and gave 15 min in polling frequency
4) Inserted some data in SAEPT.Oracle.sql
5) Checked NQserver.log after the polling time which is 15 min . NQserver.log was not getting updated or has any details about the event occurred .
Do you guys think i have missed some step in configuring EPT , if so ..please help me out i need to implement on client machine soon.
Appreciate your time guys .
Edited by: newbi on Jul 1, 2010 10:34 AM

As far as i know event polling tables are used to purge the cache automatically. It is not used to seed the cache.
If you want to seed the cache, use ibots or you have to do it as a program..
Edited by: user8000915 on Jul 1, 2010 7:37 AM

Preload DB tables into Coherence Cache using HibernateDataStore

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