Correlation set may be initialized only once

Hello !
I have the following scenario : I initialize a correlation in the first receive shape . After that , in a loop , I have a send shape , to send a bunch of messages (no correlation initializing needed since I did it at the beginning of the orchestration -
I just have the correct correlation value in the body of the message ) . In another loop I'm looking for correlated responses (I'm following the correlation ) .
What I want to do is to move the initialization of the correlation to the send port , in the loop . I'm hitting the issue with "Correlation set may be initialized only once" . The solution is to create o scope inside the loop and to move the correlation
from the general level to that scope - it works . However , when I want to select to follow the correlation in the response loop , it's not possible because is only visible to the send loop scope . Even if I create a similar scope in the receive loop and copy
the correlation there , still the responses are not correlated .
Any ideea if is possible to correlate the responses when you initialize multiple time a correlation when you are sending the requests ?
Thanks

It's because the Correlation Set can only be initialized once per Scope. But you already know that ;)
I think what you really want is a Self Correlating Ports.
http://msdn.microsoft.com/en-us/library/aa954477.aspx
There's a number of Blog posts as well with samples.

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Please refer the following section in SOA Developer Guide.
Using Correlation Sets and Message Aggregation - 11g Release 1 (11.1.1.7)
Also Refer the following sample for use of correlation sets.
bpel-305-InboundCorrelationShows how to perform message correlation within BPEL
http://java.net/projects/oraclesoasuite11g/downloads/download/BPEL/bpel-305-InboundCorrelation_1.2.zip

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--evsched
h4.
--to remove all test-objects
h4.
--test table
h4.
--define the object type to act as the payload for the queue
h4.
--creating the event queue
h4.
--creating the proc for the prog/job
h4.
--creating the proc for the prog/job
h4.
--creating the program
h4.
--creating the first job (for parallel execution)
h4.
--creating the second job (for parallel execution)
h4.
--test block
h4.
--test scenarios/results
h4.
--to remove all test-objects
DECLARE
exc_ora_27475 EXCEPTION; --ora-27475: <job_name> muss job sein
PRAGMA EXCEPTION_INIT (exc_ora_27475, -27475);
exc_ora_27476 EXCEPTION; --ora-27476: <program_name> ist nicht vorhanden
PRAGMA EXCEPTION_INIT (exc_ora_27476, -27476);
exc_ora_24010 EXCEPTION; --ORA-24010: QUEUE SYSGIS.EVENT_QUEUE ist nicht vorhanden
PRAGMA EXCEPTION_INIT (exc_ora_24010, -24010);
exc_ora_24002 EXCEPTION; --ORA-24002: QUEUE_TABLE SYSGIS.EVENT_QUEUE_TAB ist nicht vorhanden
PRAGMA EXCEPTION_INIT (exc_ora_24002, -24002);
exc_ora_4043 EXCEPTION; --ORA-04043: Objekt T_EVENT_QUEUE_PAYLOAD ist nicht vorhanden
PRAGMA EXCEPTION_INIT (exc_ora_4043, -4043);
exc_ora_942 EXCEPTION; --ORA-00942: Tabelle oder View nicht vorhanden
PRAGMA EXCEPTION_INIT (exc_ora_942, -942);
exc_ora_2289 EXCEPTION; --ORA-02289: Sequence ist nicht vorhanden.
PRAGMA EXCEPTION_INIT (exc_ora_2289, -2289);
v_fpos PLS_INTEGER := 1;
BEGIN
v_fpos := 10;
BEGIN
--remove job
SYS.DBMS_SCHEDULER.DROP_JOB(job_name=> 'job_evsched', FORCE=>TRUE);
EXCEPTION WHEN exc_ora_27475 THEN NULL;
END;
v_fpos := 12;
BEGIN
--remove job
SYS.DBMS_SCHEDULER.DROP_JOB(job_name=> 'job_evsched_2', FORCE=>TRUE);
EXCEPTION WHEN exc_ora_27475 THEN NULL;
END;
v_fpos := 20;
BEGIN
--remove program
SYS.DBMS_SCHEDULER.DROP_PROGRAM(program_name=>'prg_evsched',FORCE=>TRUE);
EXCEPTION WHEN exc_ora_27476 THEN NULL;
END;
v_fpos := 30;
BEGIN
-- stop the event queue.
DBMS_AQADM.stop_queue (queue_name => 'evsched_event_queue');
EXCEPTION WHEN exc_ora_24010 THEN NULL;
END;
v_fpos := 40;
BEGIN
-- drop the event queue.
DBMS_AQADM.drop_queue (queue_name => 'evsched_event_queue');
EXCEPTION WHEN exc_ora_24010 THEN NULL;
END;
v_fpos := 50;
BEGIN
-- Remove the queue table.
DBMS_AQADM.drop_queue_table(queue_table => 'tab_evsched_event_queue');
EXCEPTION WHEN exc_ora_24002 THEN NULL;
END;
v_fpos := 60;
BEGIN
-- remove type
EXECUTE IMMEDIATE 'DROP TYPE typ_evsched_payload';
EXCEPTION WHEN exc_ora_4043 THEN NULL;
END;
v_fpos := 70;
BEGIN
-- remove table
EXECUTE IMMEDIATE 'DROP TABLE tab_evsched';
EXCEPTION WHEN exc_ora_942 THEN NULL;
END;
v_fpos := 80;
BEGIN
-- remove sequence
EXECUTE IMMEDIATE 'DROP SEQUENCE seq_evsched';
EXCEPTION WHEN exc_ora_2289 THEN NULL;
END;
EXCEPTION
WHEN OTHERS THEN
dbms_output.put_line('v_fpos='||v_fpos);
END;
h4.
--test table
CREATE TABLE tab_evsched
( id NUMBER
, sys_date DATE
, status VARCHAR2(1)
, processed VARCHAR2(1) DEFAULT 'N'
, processed_by varchar2(128)
GRANT DELETE, INSERT, SELECT, UPDATE ON tab_evsched TO PUBLIC
CREATE SEQUENCE seq_evsched
h4.
--define the object type to act as the payload for the queue
CREATE OR REPLACE TYPE typ_evsched_payload AS OBJECT
( event_name VARCHAR2(30)
, tab_evsched_id NUMBER
, daterf DATE
h4.
--creating the event queue
BEGIN
-- Create a queue table to hold the event queue.
DBMS_AQADM.create_queue_table
( queue_table => 'tab_evsched_event_queue'
, queue_payload_type => 'typ_evsched_payload'
, multiple_consumers => TRUE
, COMMENT => 'Queue Table For Event Messages'
-- Create the event queue.
DBMS_AQADM.create_queue
( queue_name => 'evsched_event_queue'
, queue_table => 'tab_evsched_event_queue'
, queue_type => DBMS_AQADM.NORMAL_QUEUE
, max_retries => 0
, retry_delay => 0
, dependency_tracking => FALSE
, comment => 'Test Object Type Queue'
, auto_commit => FALSE
-- Start the event queue.
DBMS_AQADM.start_queue
( queue_name => 'evsched_event_queue'
END;
h4.
--creating the proc for the prog/job
CREATE OR REPLACE PROCEDURE prc_evsched
( p_message IN typ_evsched_payload
, p_job_name IN VARCHAR2
IS
BEGIN
UPDATE tab_evsched
SET processed = 'J'
, processed_by = p_job_name
, sys_date = p_message.daterf
WHERE 1=1
AND id = p_message.tab_evsched_id
dbms_lock.sleep(5); --#sleep-1#
COMMIT;
END prc_evsched;
h4.
--creating the program
DECLARE
exc_ora_27476 EXCEPTION; --ora-27476: <program_name> ist nicht vorhanden
PRAGMA EXCEPTION_INIT (exc_ora_27476, -27476);
BEGIN
BEGIN
SYS.DBMS_SCHEDULER.DROP_PROGRAM(program_name=>'prg_evsched',FORCE=>TRUE);
EXCEPTION
WHEN exc_ora_27476 THEN
NULL;
END;
SYS.DBMS_SCHEDULER.CREATE_PROGRAM
( program_name => 'prg_evsched'
, program_type => 'STORED_PROCEDURE'
, program_action => '"SYSGIS"."PRC_EVSCHED"'
, number_of_arguments => 2
, enabled => FALSE
, comments => 'Program-Komponent für den Test von DBMS_SCHEDULER'
--event message as the first param to prc_evsched
DBMS_SCHEDULER.DEFINE_METADATA_ARGUMENT
( program_name => 'prg_evsched'
, argument_position => 1
, metadata_attribute => 'EVENT_MESSAGE'
--name of the job as the second param to prc_evsched
SYS.DBMS_SCHEDULER.define_program_argument
( program_name => 'prg_evsched'
, argument_name => 'p_job_name'
, argument_position => 2
, argument_type => 'VARCHAR2'
, default_value => 'dummy'
--enable program
SYS.DBMS_SCHEDULER.ENABLE(NAME=>'prg_evsched');
END;
h4.
--creating the first job (for parallel execution)
DECLARE
exc_ora_27475 EXCEPTION; --ora-27475: <job_name> muss job sein
PRAGMA EXCEPTION_INIT (exc_ora_27475, -27475);
BEGIN
BEGIN
--remove job
SYS.DBMS_SCHEDULER.DROP_JOB(job_name=> 'job_evsched', FORCE=>TRUE);
EXCEPTION WHEN exc_ora_27475 THEN NULL;
END;
DBMS_SCHEDULER.create_job
( job_name => 'job_evsched'
, program_name => 'prg_evsched'
, start_date => SYSTIMESTAMP
, event_condition => 'tab.user_data.event_name = ''MYEVENT'''
, queue_spec => 'evsched_event_queue'
, auto_drop => FALSE
, enabled => FALSE
SYS.DBMS_SCHEDULER.SET_JOB_ARGUMENT_VALUE
( job_name => 'job_evsched'
, argument_name => 'p_job_name'
, argument_value => 'job_evsched'
SYS.DBMS_SCHEDULER.ENABLE(NAME=>'job_evsched');
END;
h4.
--creating the second job (for parallel execution)
DECLARE
exc_ora_27475 EXCEPTION; --ora-27475: <job_name> muss job sein
PRAGMA EXCEPTION_INIT (exc_ora_27475, -27475);
BEGIN
BEGIN
--remove job
SYS.DBMS_SCHEDULER.DROP_JOB(job_name=> 'job_evsched_2', FORCE=>TRUE);
EXCEPTION WHEN exc_ora_27475 THEN NULL;
END;
DBMS_SCHEDULER.create_job
( job_name => 'job_evsched_2'
, program_name => 'prg_evsched'
, start_date => SYSTIMESTAMP
, event_condition => 'tab.user_data.event_name = ''MYEVENT'''
, queue_spec => 'evsched_event_queue'
, auto_drop => FALSE
, enabled => FALSE
SYS.DBMS_SCHEDULER.SET_JOB_ARGUMENT_VALUE
( job_name => 'job_evsched_2'
, argument_name => 'p_job_name'
, argument_value => 'job_evsched_2'
SYS.DBMS_SCHEDULER.ENABLE(NAME=>'job_evsched_2');
END;
h4.
--test block
DECLARE
PROCEDURE pr_ins_tab_evsched
( p_id IN NUMBER
, p_status IN VARCHAR2
IS
BEGIN
INSERT INTO tab_evsched(id,status) VALUES (p_id, p_status);
COMMIT;
--enqueue the MYEVENT-event
IF p_status = 'M' THEN
--enqueue works in 1sekunden-taktung.... !?
dbms_lock.sleep(1); --#sleep-2#
DECLARE
v_enqueue_options DBMS_AQ.enqueue_options_t;
v_message_properties DBMS_AQ.message_properties_t;
v_message_handle RAW(16);
v_queue_msg typ_evsched_payload;
BEGIN
v_queue_msg := typ_evsched_payload
( event_name => 'MYEVENT'
, tab_evsched_id => p_id
, daterf => SYSDATE
v_enqueue_options.VISIBILITY := DBMS_AQ.ON_COMMIT;
v_enqueue_options.delivery_mode := DBMS_AQ.PERSISTENT;
v_message_properties.PRIORITY := 1;
v_message_properties.DELAY := DBMS_AQ.NO_DELAY;
v_message_properties.EXPIRATION := DBMS_AQ.NEVER;
v_message_properties.CORRELATION := 'TEST MESSAGE';
DBMS_AQ.enqueue
( queue_name => 'evsched_event_queue'
, enqueue_options => v_enqueue_options
, message_properties => v_message_properties
, payload => v_queue_msg
, msgid => v_message_handle
END;
END IF;
COMMIT;
END pr_ins_tab_evsched;
BEGIN
DELETE tab_evsched;
pr_ins_tab_evsched (seq_evsched.NEXTVAL,'M');
pr_ins_tab_evsched (seq_evsched.NEXTVAL,'M');
pr_ins_tab_evsched (seq_evsched.NEXTVAL,'M');
pr_ins_tab_evsched (seq_evsched.NEXTVAL,'M');
pr_ins_tab_evsched (seq_evsched.NEXTVAL,'M');
pr_ins_tab_evsched (seq_evsched.NEXTVAL,'M');
pr_ins_tab_evsched (seq_evsched.NEXTVAL,'M');
pr_ins_tab_evsched (seq_evsched.NEXTVAL,'M');
END;
SELECT * FROM tab_evsched ORDER BY id;
SELECT * FROM sysgis.tab_evsched_event_queue;
h4.
--test scenarios/resultsh
h5.
--test results #sleep-1#=5, #sleep-2#=0
--job (job_evsched) runs only once, only the first event is enqued/processed
ID SYS_DATE STATUS PROCESSED PROCESSED_BY
9 22.03.2012 17:00:41 M J job_evsched
10 (Null) M N (Null)
11 (Null) M N (Null)
12 (Null) M N (Null)
13 (Null) M N (Null)
14 (Null) M N (Null)
15 (Null) M N (Null)
16 (Null) M N (Null)
h5.
--test results #sleep-1#=0, #sleep-2#=1
--jobs (job_evsched/job_evsched2) run alternately, every events are enqued/processed
ID SYS_DATE STATUS PROCESSED PROCESSED_BY
25 22.03.2012 17:04:31 M J job_evsched_2
26 22.03.2012 17:04:32 M J job_evsched_2
27 22.03.2012 17:04:33 M J job_evsched
28 22.03.2012 17:04:34 M J job_evsched_2
29 22.03.2012 17:04:35 M J job_evsched_2
30 22.03.2012 17:04:36 M J job_evsched_2
31 22.03.2012 17:04:37 M J job_evsched
32 22.03.2012 17:04:38 M J job_evsched_2
h5.
--test results #sleep-1#=5, #sleep-2#=1
--jobs (job_evsched/job_evsched2) run alternately, only two events are enqued/processed
ID SYS_DATE STATUS PROCESSED PROCESSED_BY
41 22.03.2012 17:07:42 M J job_evsched_2
42 (Null) M N (Null)
43 (Null) M N (Null)
44 (Null) M N (Null)
45 (Null) M N (Null)
46 (Null) M N (Null)
47 22.03.2012 17:07:48 M J job_evsched
48 (Null) M N (Null)
*/

hi, thank you for your (fast) answer! that is the solution to my problem!
now i have a follow-up question:
i've got a procedure, that runs between 1 and 2 minutes long. unlimited running lightweight jobs
would freeze the db...
how can the count of the parallel running lightweight-jobs be limited?
according to the documentation it is not possible:
There is no explicit limit to the number of lightweight jobs that can run simultaneously to process multiple instances of the event.
However, limitations may be imposed by available system resources.
could you explain to me, what it (...available system recources...) means?
eventually what i would like to have: max. two parallel running (lightweight) jobs....
thank you in advance, bye, á
ps: can i attach a file to the post anyway?
Edited by: user4786904 on 23.03.2012 07:22

Correlation sets

Hi,
Is it possible to use correlation sets for correlation multiple messages.I mean more than two messages.If so how to achieve this.For example I should return a response only after say 10 number of messages of the same group have arrived.

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We are working on Consignment Sales configuration.
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Edited by: Hussein Merchant on Oct 20, 2009 6:51 AM

Hi,
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Help: I want to auto schedule a load using file watcher but it runs only once for the first time and after that it is not running at all

Hi All,
I am trying to execute the below code as provided from one of the blogs. i am able to run the job only once based on a file watcher object(i.e. for very first time) and after that the job is not running at all and if i schedule the job to run automatically based on interval of 10 or more minutes it is executing properly). Please let me know or guide me if i have missed any step or configuration.that is needed.
Version of Oracle 11.2.0.1.0
OS : Windows 7 Prof
Given all the necessary privileges
BEGIN
DBMS_SCHEDULER.CREATE_CREDENTIAL(
     credential_name => 'cred',
     username        => 'XXXX',
     password        => 'XXXX');
END;
CREATE TABLE ZZZZ (WHEN timestamp, file_name varchar2(100),
   file_size number, processed char(1));
CREATE OR REPLACE PROCEDURE YYYY
(payload IN sys.scheduler_filewatcher_result) AS
BEGIN
INSERT INTO ZZZZ VALUES
     (payload.file_timestamp,
      payload.directory_path || '/' || payload.actual_file_name,
      payload.file_size,
      'N');
END;
BEGIN
DBMS_SCHEDULER.CREATE_PROGRAM(
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    program_type        => 'stored_procedure',
    program_action      => 'YYYY',
    number_of_arguments => 1,
    enabled             => FALSE);
DBMS_SCHEDULER.DEFINE_METADATA_ARGUMENT(
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    argument_position   => 1);
DBMS_SCHEDULER.ENABLE('prog1');
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DBMS_SCHEDULER.CREATE_FILE_WATCHER(
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    directory_path    => 'D:\AAAA',
    file_name         => '*.txt',
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END;
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DBMS_SCHEDULER.CREATE_JOB(
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    program_name    => 'prog1',
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Regards,
kumar.

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SCOTT@orcl12c> SELECT banner FROM v$version
2 /
BANNER
Oracle Database 12c Enterprise Edition Release 12.1.0.1.0 - 64bit Production
PL/SQL Release 12.1.0.1.0 - Production
CORE    12.1.0.1.0    Production
TNS for 64-bit Windows: Version 12.1.0.1.0 - Production
NLSRTL Version 12.1.0.1.0 - Production
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2    DBMS_SCHEDULER.SET_ATTRIBUTE
3       ('file_watcher_schedule',
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7 /
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2    -- create credential using operating system user and password (fill in your own):
3    DBMS_SCHEDULER.CREATE_CREDENTIAL
4       (credential_name     => 'cred',
5        username          => '...',
6        password          => '...');
7 END;
8 /
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2    (WHEN      timestamp,
3      file_name varchar2(100),
4      file_size number,
5      processed char(1))
6 /
Table created.
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2    (payload IN sys.scheduler_filewatcher_result)
3 AS
4 BEGIN
5    INSERT INTO ZZZZ VALUES
6        (payload.file_timestamp,
7         payload.directory_path || '/' || payload.actual_file_name,
8         payload.file_size,
9         'N');
10 END;
11 /
Procedure created.
SCOTT@orcl12c> -- create program, define metadata, and enable:
SCOTT@orcl12c> BEGIN
2    DBMS_SCHEDULER.CREATE_PROGRAM
3       (program_name          => 'prog1',
4        program_type          => 'stored_procedure',
5        program_action      => 'YYYY',
6        number_of_arguments => 1,
7        enabled          => FALSE);
8    DBMS_SCHEDULER.DEFINE_METADATA_ARGUMENT(
9       program_name         => 'prog1',
10       metadata_attribute => 'event_message',
11       argument_position   => 1);
12    DBMS_SCHEDULER.ENABLE ('prog1');
13 END;
14 /
PL/SQL procedure successfully completed.
SCOTT@orcl12c> BEGIN
2    -- create file watcher:
3    DBMS_SCHEDULER.CREATE_FILE_WATCHER
4       (file_watcher_name   => 'file_watcher1',
5        directory_path      => 'c:\my_oracle_files',
6        file_name          => 'f*.txt',
7        credential_name     => 'cred',
8        destination          => NULL,
9        enabled          => FALSE);
10 END;
11 /
PL/SQL procedure successfully completed.
SCOTT@orcl12c> BEGIN
2    -- create job:
3    DBMS_SCHEDULER.CREATE_JOB
4       (job_name          => 'job1',
5        program_name          => 'prog1',
6        queue_spec          => 'file_watcher1',
7        auto_drop          => FALSE,
8        enabled          => FALSE);
9    -- set attributes:
10    DBMS_SCHEDULER.SET_ATTRIBUTE ('job1', 'PARALLEL_INSTANCES', TRUE);
11 END;
12 /
PL/SQL procedure successfully completed.
SCOTT@orcl12c> -- enable:
SCOTT@orcl12c> EXEC DBMS_SCHEDULER.enable ('file_watcher1, job1');
PL/SQL procedure successfully completed.
SCOTT@orcl12c> -- write file (file must not exist previously):
SCOTT@orcl12c> CREATE OR REPLACE DIRECTORY upncommon_dir AS 'c:\my_oracle_files'
2 /
Directory created.
SCOTT@orcl12c> declare
2    filtyp utl_file.file_type;
3 begin
4    filtyp := utl_file.fopen ('UPNCOMMON_DIR', 'file1.txt', 'W', NULL);
5    utl_file.put_line (filtyp, 'File has arrived ' || SYSTIMESTAMP, TRUE);
6    utl_file.fclose (filtyp);
7 end;
8 /
PL/SQL procedure successfully completed.
SCOTT@orcl12c> -- wait long enough (may take more than one minute) for job to run:
SCOTT@orcl12c> EXEC DBMS_LOCK.SLEEP (100)
PL/SQL procedure successfully completed.
SCOTT@orcl12c> -- check for results:
SCOTT@orcl12c> SELECT * FROM zzzz
2 /
WHEN
FILE_NAME
FILE_SIZE P
22-OCT-13 10.12.28.309000 PM
c:\my_oracle_files/file1.txt
        57 N
1 row selected.
SCOTT@orcl12c> declare
2    filtyp utl_file.file_type;
3 begin
4    filtyp := utl_file.fopen ('UPNCOMMON_DIR', 'file2.txt', 'W', NULL);
5    utl_file.put_line (filtyp, 'File has arrived ' || SYSTIMESTAMP, TRUE);
6    utl_file.fclose (filtyp);
7 end;
8 /
PL/SQL procedure successfully completed.
SCOTT@orcl12c> -- wait long enough (may take more than one minute) for job to run:
SCOTT@orcl12c> EXEC DBMS_LOCK.SLEEP (100)
PL/SQL procedure successfully completed.
SCOTT@orcl12c> -- check for results:
SCOTT@orcl12c> SELECT * FROM zzzz
2 /
WHEN
FILE_NAME
FILE_SIZE P
22-OCT-13 10.12.28.309000 PM
c:\my_oracle_files/file1.txt
        57 N
22-OCT-13 10.14.08.580000 PM
c:\my_oracle_files/file2.txt
        57 N
2 rows selected.

How do I make something happen only once on a true condition in a loop

So I have a way of doing this, but it uses a dreaded local variable, and seems to me that it might be unreliable.
What I want to happen is to have something happen only once on a condition that will remain true. What I need is to set something after a given amount of time, but I only want to set it once after that time has been reached. Problem is, if I use a range, it could be true more than once, if I use a greater than, it'll be true every time after the set time, and if I use an equal, there's no way to know that the particular millisecond value will even appear in the loop.
Maybe I'm wrong in even using those comparison functions... Any ideas would be greatly appreciated. See the attached vi for a better look at what I'm trying to do... (v7.0)
Thanks,
Geoff
Attachments:
Question.vi ‏16 KB

The "Idle" state that the help file refers to is the "non-running"
state. The Top Level VI must end execution before any "First Time" VIs will
return TRUE after being called initially.
Therefore, if your application calls a subVI at the beginning of the
Test portion, on the next iteration of the loop it will return FALSE
from that subVI, since your main VI never stopped running, and received
a TRUE from the "First Time" on the initial test loop.
If you have code that you want to execute only on the first run of your
entire program, "First Time" should work fine. If you have code that
you only want to execute on the first iteration of just the Test loop,
the "First Time" VI is not ideal.
I think that shift registers are going to provide the best solution,
however you mentioned that for your particular application that is not
ideal. Could you describe a little bit more why shift registers are
problematic?
Thanks Geoff, let us know.
DWeiland
Applications Engineer
National Instruments
www.ni.com/support
Dan Weiland

0crm_mktattr_attr - delta only once per day possible?

Hi all,
we want to use delta functionality for 0crm_mktattr_attr. The problem is, that only once a day the delta for a business partner is beeing transfered to the bw. If you have done another change on the same business partner, no delta is being generated (neither that day nor the next day - so this change is lost). If we change another business partner, a new delta is created (if the business partner was not changed before the first delta. Is there any other setting we have to do to transfer get each change?
We're using CRM 7.01 SP07, BW 7.0. 0crm_mktattr_attr is already set to Delta-method AIE, changepointers (general) are activated and changepointers for message type RS0026 are also activated.
Regards,
Florian

Hi Florian,
Any solution for this problem?
I also need to load data 0CRM_MKTATTR_ATTR and I´m not sure which change pointer I have to activate. For the INITIAL data load into SAP CRM, we deactivate the Change Pointer RS0027 as SAP oriented.
If I set it back, will this Datasource be Delta enabled?
Thanks
Fábio

Correlation Set in BPEL (11G)

I was trying to learn the concept of correlation set and did a simple POC. built 3 simple service A,B,C. A -> B -> C -> A. Services A and C are asynchronous and B is one way. Service A has Invoke to B and a Receive from C. Defined Correlation set with appropriate property and Aliases (one with service B's Request Message type and another with service C's Response Message Type). Initiated the correlation set in Invoke from A -> B and set patter as 'IN' as the request is sent. Used the same correlation set for receive from A <- C with initiate set to 'NO'. When I tested this flow, I got an error "Correlation set no initialized.It cannot be used in receiving activity". Blindly going by the error message, initiated the correlation set at the first receive of service A. Now got no error but the process A is running for long time, pending receive response from C. I know this is not conceptually correct solution to overcome the initiate error in receive of A <- C. Can someone explain me what's the mistake am making here and a solution to complete this POC successfully?
Thanking in advance
Ranjani

Hello,
Sorry for late response.
I have 1 more question before that.
When C is replying then how does service 'C' knows that it is replying to service 'A'?
I'm asking this because B is 1 way service, but it is invoking service C which is asynchronous so at some point of time B is expecting a response from service C. On other hand if you have used both receive and reply activity in the flow of service C using same partner link then what it does is that it sends response back to service B. There is ReplyTo http header which comes in input request and based on URL present inside it, reply activity knows where to send response back. This case will require 2 partner links in service C. receive will be based on input from B and reply(A is not waiting for response since it did 1 way invocation to service B hence I think we should use Invoke activity here instead of reply activity to send response back to service A, will have to findout using POC) will be based on partner link for service A (Callback port).
Just try to explore on this direction once since I am currently away from my system. As soon as I get back, I will implement this POC in my system if it doesn't work. Meanwhile see if above direction works.
Regards,
Ankit

Question about Correlation set

There is a process: a proposer submit a claim, then it needs all the proposer's supervisors to approve, if any of them reject the request, the
claim will return to proposer and process terminates. If all the supervisors approve, the process can continue. I know after the correlation set is added to every receive node in the process, every node can receive only once a message and the process will move on to the next receive node after the last one has received one message,
what I should do if I want one node to receive messages multiple times(actually a loop including the node) util a required condition is true?
Thank you.

I am not sure if you are talking in reference to the original question or not.
I will assume not,
yes you can use multiple correlation sets that you define on the same message. And that message can be reused in different operations there is no issue with it.
I also assumed you didn't mean that both the receive activities use the same partner, porttype and operation. Because that is a different thing again.
-Kiran Bhumana.

PreparedStatement vs Statement - When executing only once

Are there any performance implications in using PreparedStatement vs
Statement when you are executing the SQL only once? I am talking about all
kinds of SQL (Select, Update, Insert and Delete). If PrepatedStatement is
used, I would expect some overhead in setting values for different columns
separately and precompliling. Is that overhead significant enough to
degrade performance? If we execute statement only once, I do not expect to
any gain on performance.
I would appreciate any comments.
Sarat

It also depends on the database/driver combination,several database can be
configured to maintain a prepared statement cache at the DB level (I have
never done it myself, but I know people who has done this. Lately I use
mostly Oracle, for which I should not be configured an expert :)).
Also the weblogic's prepared statement cache only caches first so many
statements. If you have used them all up at the startup you are out of luck.
I know you already knew that, but may be helpful to the original poster.
.raja
"Cameron Purdy" <[email protected]> wrote in message
news:[email protected]..
BTW - there is a case where prepped stmts are faster -- when they arecached
by Weblogic's jdbc wrappers. So my previous answer can be wrong.
Peace,
Cameron Purdy
Tangosol Inc.
<< Tangosol Server: How Weblogic applications are customized >>
<< Download now from http://www.tangosol.com/download.jsp >>
"sarat" <[email protected]> wrote in message
news:3b715901$[email protected]..
Are there any performance implications in using PreparedStatement vs
Statement when you are executing the SQL only once? I am talking aboutall
kinds of SQL (Select, Update, Insert and Delete). If PrepatedStatement
is
used, I would expect some overhead in setting values for differentcolumns
separately and precompliling. Is that overhead significant enough to
degrade performance? If we execute statement only once, I do not expectto
any gain on performance.
I would appreciate any comments.
Sarat

Correlation set may be initialized only once

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