Try to create a javabean for connection

I am now trying to create a javabean for connection. i have read some books and resource online
but seem to be a bit confusing
some of the method return conn for connection
while some did not
so is it nessary for me to return conn?
this connection bean is for connection to mysql. and other class will make use of this connection class for updating, select of record.
Can anyone please brief me some idea on how to create it?
As i am a newbie in java programming
really need you guys help.

You can have a look at the third party connection beans available and choose whichever is good. http://www.j2eeolympus.com/J2EE/JDBC/JDBCConnectionPooling.html

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'''Try Firefox Safe Mode''' to see if the problem goes away. Safe Mode is a troubleshooting mode, which disables most add-ons.
''(If you're not using it, switch to the Default theme.)''
* On Windows you can open Firefox 4.0+ in Safe Mode by holding the '''Shift''' key when you open the Firefox desktop or Start menu shortcut.
* On Mac you can open Firefox 4.0+ in Safe Mode by holding the '''option''' key while starting Firefox.
* On Linux you can open Firefox 4.0+ in Safe Mode by quitting Firefox and then going to your Terminal and running: firefox -safe-mode (you may need to specify the Firefox installation path e.g. /usr/lib/firefox)
* Or open the Help menu and click on the '''Restart with Add-ons Disabled...''' menu item while Firefox is running.
[[Image:FirefoxSafeMode|width=520]]
''Once you get the pop-up, just select "'Start in Safe Mode"''
[[Image:Safe Mode Fx 15 - Win]]
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National Instruments
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Copyright (c) 1982, 2010, Oracle. All rights reserved.
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BANNER
Oracle Database 11g 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 Solaris: Version 11.2.0.3.0 - Production
NLSRTL Version 11.2.0.3.0 - Production
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SQL> COLUMN upper_port FORMAT 99999
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SQL> COLUMN acl FORMAT A40
SQL> COLUMN principal FORMAT A15
SQL> COLUMN privilege FORMAT A10
SQL> COLUMN is_grant FORMAT A8
SQL> COLUMN status FORMAT A10
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no rows selected
SQL> SELECT acl,principal,privilege,is_grant FROM dba_network_acl_privileges;
no rows selected
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User created.
SQL> GRANT CONNECT TO testacl;
Grant succeeded.
SQL>
SQL> BEGIN
2     dbms_network_acl_admin.create_acl('test_smtp.xml','TEST SMTP ACL','TESTACL',true,'connect');
3     dbms_network_acl_admin.assign_acl('test_smtp.xml','localhost',25);
4     commit;
5 END;
6 /
PL/SQL procedure successfully completed.
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HOST                 LOWER_PORT UPPER_PORT ACL
localhost                    25         25 /sys/acls/test_smtp.xml
SQL> SELECT acl,principal,privilege,is_grant FROM dba_network_acl_privileges;
ACL                                      PRINCIPAL       PRIVILEGE IS_GRANT
/sys/acls/test_smtp.xml                  TESTACL         connect    true
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SQL> CONNECT testacl/testacl@testdb
Connected.
SQL> SELECT host, lower_port, upper_port, privilege, status FROM user_network_acl_privileges;
HOST                 LOWER_PORT UPPER_PORT PRIVILEGE STATUS
localhost                    25         25 connect    GRANTED
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2     c utl_smtp.connection;
3 BEGIN
4     c := utl_smtp.open_connection('localhost', 25); -- SMTP on port 25
5     utl_smtp.helo(c, 'localhost');
6     utl_smtp.mail(c, 'Oracle11.2');
7     utl_smtp.rcpt(c, '[email protected]');
8     utl_smtp.data(c,'From: Oracle'||utl_tcp.crlf||'To: [email protected]'||utl_tcp.crlf||'Subject: UTL_SMTP TEST'||utl_tcp.crlf||'');
9     utl_smtp.quit(c);
10 END;
11 /
PL/SQL procedure successfully completed.
SQL>
This works fine and I receive the email correctly. Now if I try to do the same thing for a role:
SQL> CONNECT system/******@testdb
Connected.
SQL> BEGIN
2     dbms_network_acl_admin.drop_acl('test_smtp.xml');
3     commit;
4 END;
5 /
PL/SQL procedure successfully completed.
SQL> SELECT host, lower_port, upper_port, acl FROM dba_network_acls;
no rows selected
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Role created.
SQL> GRANT testacl_role TO testacl;
Grant succeeded.
SQL> ALTER USER testacl DEFAULT ROLE ALL;
User altered.
SQL>
SQL> BEGIN
2     dbms_network_acl_admin.create_acl('test_smtp.xml','TEST SMTP ACL','TESTACL_ROLE',true,'connect');
3     dbms_network_acl_admin.assign_acl('test_smtp.xml','localhost',25);
4     commit;
5 END;
6 /
PL/SQL procedure successfully completed.
SQL> SELECT host, lower_port, upper_port, acl FROM dba_network_acls;
HOST                 LOWER_PORT UPPER_PORT ACL
localhost                    25         25 /sys/acls/test_smtp.xml
SQL> SELECT acl,principal,privilege,is_grant FROM dba_network_acl_privileges;
ACL                                      PRINCIPAL       PRIVILEGE IS_GRANT
/sys/acls/test_smtp.xml                  TESTACL_ROLE    connect    true
SQL>
And now I test it again with the same user:
SQL> CONNECT testacl/testacl@testdb
Connected.
SQL>
SQL> SELECT host, lower_port, upper_port, privilege, status FROM user_network_acl_privileges;
no rows selected
SQL> DECLARE
2     c utl_smtp.connection;
3 BEGIN
4     c := utl_smtp.open_connection('localhost', 25); -- SMTP on port 25
5     utl_smtp.helo(c, 'localhost');
6     utl_smtp.mail(c, 'Oracle11.2');
7     utl_smtp.rcpt(c, '[email protected]');
8     utl_smtp.data(c,'From: Oracle'||utl_tcp.crlf||'To: [email protected]'||utl_tcp.crlf||'Subject: UTL_SMTP TEST'||utl_tcp.crlf||'');
9     utl_smtp.quit(c);
10 END;
11 /
DECLARE
ERROR at line 1:
ORA-24247: network access denied by access control list (ACL)
ORA-06512: at "SYS.UTL_TCP", line 17
ORA-06512: at "SYS.UTL_TCP", line 267
ORA-06512: at "SYS.UTL_SMTP", line 161
ORA-06512: at "SYS.UTL_SMTP", line 197
ORA-06512: at line 4
SQL>
I'm aware that role privileges doesn't apply inside procedures, functions or packages by default, but this is an anonymous block so it should use the active roles for the user. I also tried adding a "dbms_session.set_role('TESTACL_ROLE');" at the beggining of the anonymous PL/SQL block but I got the same access error.
Thanks in advance for any help you can give to me on this question, it would be very hard to grant the ACL to all the individual users as they are more than 1000, and we create more regularly.

Thanks for your quick reply... I don't have a problem creating the basic ACL with the privileges granted for a user. The problem appears when I try to create an ACL with privileges for a ROLE. You can see here http://docs.oracle.com/cd/E11882_01/appdev.112/e25788/d_networkacl_adm.htm#BABIGEGG than the official Oracle documentation states that you can assign the ACL principal to be a user or role:
Parameter
Description
acl
Name of the ACL. Relative path will be relative to "/sys/acls".
description
Description attribute in the ACL
principal
Principal (database user or role) to whom the privilege is granted or denied. Case sensitive.
My issue is that when I try to create the ACL for a role it doesn't work.
Have you ever created an ACL for a role? if so please send me an example or let me know which step I might be missing. Cheers.

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SQL Exception
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In a shortcut:
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3.- create the control file <filename>.ctl:
import data
into table <schema>."<table name>"
from '<source cvs>.csv'
record delimited by '
fields delimited by ','
optionally enclosed by '"'
error log '<file name>.err'
4.- execute command:
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How to load CSV files into HANA
Will HANA supports Bulkload
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Hi,
When I try to create a PO for a Material having Material Master and Vendor Master maintained but no Info Record, system does not accept the Net Price and the Price Condition also does not appear. Is there any way to create a PO for a Material having Net Price but without Info Record?
Regards.

Hi,
The first time you create a PO for a material/vendor combination, then system will not prompt any price as info record or valid conditions have not been found.
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Hope you are clear with this..Any doubts revert back.
Regards,
Deepak.

Try to create a javabean for connection

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