OracleConnectionCacheImpl vs OracleConnectionPoolDataSource

I'm a little confused as to the division of labor between these two classes... What does the cache give me that the regular ConnectionPoolDataSource doesn't?

HI,
The very basic difference between OracleConnectionCacheImpl and OracleConnectionPoolDataSource is that
OracleConnectionCacheImpl cann connect only to one database and schema while using OracleConnectionPoolDataSource you get the flexibility of connection to different schemas.
Since ConnCache can connect to only one schema, it stores connection metadata,state....and lot of stuff so that its very efficient than OracleConnectionPoolDataSource.
But if you need the flexibility of connecting to different schemas, we prefer OracleConnectionPoolDataSource.
In OracleConnectionCacheImpl we have different conn cache schemes, Dynamic, Fixed wait and Fixed with no wait.
Going deeper, OracleConnectionPoolDataSource is Oracle's implementation of javax.sql.ConnectionPoolDataSource interface, while
OracleConnectionCacheImpl is a sample implementation of interface OracleConnectionCache. Anybody can implement there own version of OracleConnectionCache and handle the ConnectionEvents generated.
Hope this helps
Elango.

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DataSource-class pool-JNDI-bind-lookup

Hi,
I am a beginner in this subject and it is confused. I read that
the best way to use the connections is from a DataSource. There
are 2 ways to configure it:
1- From the data-source.xml file
2- Or using InitialContext, Context and bind method from a java
program loaded in the startup.
If so, which one is better?
On the other hand, there are some classes I can use, for
instance:
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2- OracleConnectionPoolDataSource
etc.
which one is better?
Thank you very much for any comment.
Andres.

Hi:
upon further research, i find that the data
that was used in State class at binding does not change on any update,
like via foll -
State s = (State)ic.lookup(JNDINAME);
s.addHashtableEntry (key, val); or
s.setDesc ("new desc");
next time i lookup State class the hashtable entry is missing and desc is
old and not "new desc".
any help appreciated.
thanks
rajans
Rajan Sadasivan wrote:
Hi:
I am using jdk1.3, weblogic6.0
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Setting roles on connection pools

Hi,
using OracleConnectionCacheImpl and OracleConnectionPoolDataSource,
how can I set a role on the pooled connections since the creation of the physical
connection is out of my hands ? Ideally, I would like to set the role only once
so that when I call getConnection() to get the logical connection I do not have
to set it again and again ...
We are using exclusively stored procedures which one can execute according to its role.
Typically, my client has a role and uses a well known ConnectionCache which should
set the role accordingly.
Is the only solution to set the role on each request ?
I hope not.
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Cheers
Arnaud

Hi,
using OracleConnectionCacheImpl and OracleConnectionPoolDataSource,
how can I set a role on the pooled connections since the creation of the physical
connection is out of my hands ? Ideally, I would like to set the role only once
so that when I call getConnection() to get the logical connection I do not have
to set it again and again ...
We are using exclusively stored procedures which one can execute according to its role.
Typically, my client has a role and uses a well known ConnectionCache which should
set the role accordingly.
Is the only solution to set the role on each request ?
I hope not.
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Cheers
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Cache_scheme and OracleConnectionPoolDataSource

Hi guys.
I am implementing Oracle's OracleConnectionPoolDataSource to provide Connection Pooling. So far, so good. However, I also wanted to introduce the use of cache_scheme for optimising once we reach the max connections limit. Do I need to use OracleConnectionCacheImpl instead of OracleConnectionPoolDataSource in order to utilise cache_scheme ? Or does OracleConnectionPoolDataSource make use of this within it's own implementation ?
Thanks.
Steve.

Hi Dmitry,
     The behavior of the near cache depends on the invalidation startegy used. You can choose invalidation strategy by adding <invalidation-strategy> element to your <near-scheme> definition, and choosing one of the following four options:
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     HTH,
     Aleks
     Message was edited by: aseovic

OracleConnectionPoolDataSource and JNDI

I am attempting to use the OracleConnectionPoolDataSource via JNDI.
I have defined two <data-source> items in the data-sources.xml file; one is for a non-pooled javax.sql.DataSource object, the other is for a pooled oracle.jdbc.pool.OracleConnectionPoolDataSource.
data-sources.xml:

<data-source
class="javax.sql.DataSource"
name="jdbc/myDS"
location="jdbc/myDS"
url="jdbc:oracle:thin:@nn.nnn.nnn.nnn:1521:MYSID"
username="xxx"
password="yyy"
/>

<data-source
class="oracle.jdbc.pool.OracleConnectionPoolDataSource"
name="jdbc/pool/myDS"
location="jdbc/pool/myDS"
url=" jdbc:oracle:thin:@nn.nnn.nnn.nnn:1521:MYSID "
username="xxx"
password="yyy"
/>
I can get a non-pooled DataSource, however, when I attempt to obtain a pooled DataSource, OC4J (via JDeveloper 10g) throws an exception:
Error instantiating web-app JNDI-context: Unknown resource type: oracle.jdbc.pool.OracleConnectionPoolDataSource
Why can't OC4J recognize this object?

ok man you shell set teh class12.jar in you server class path , try it

OracleConnectionCacheImpl setter values for instance properties

Hi!
I'm using OracleConnectionCacheImpl to cache my connections to the Oracle 8i (8.1.7.4)
The JDBC driver that I'm using is 9.2.x
I've read through the SQLJ/JDBC documentation and learned that it is possible to use certain properties for controlling the behaviour of connection cache.
Only thing is that the documentation does not specify whether the values for the properties should be milliseconds, seconds, minutes or something else. The long type of the parameter value would indicate milliseconds but according my minimal testing at least some of the values propably are not milliseconds. Help is greatly appreciated. Below is the list of the properties I'm interested in:
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ods.setCacheTimeToLiveTimeout(cacheTimeToLiveTimeout);
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ods.setCacheInactivityTimeout(cacheInactivityTimeout);
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ods.setCacheFixedWaitTimeout(cacheFixedWaitTimeout);
// How long the cache waits before polling for an available connection
ods.setCacheFixedWaitIdleTime(cacheFixedWaitIdleTime); */
Best Regards:
Aapo Romu

Hello Radhakrishna D S,
The note you provided did not fit our problem. The bootstrap.maxheapsize in the instance.properties file is already 128MB. Thanks anyway!

OracleConnectionCacheImpl - "Setting the user name and passwwdd"

Does anyone know how to disable (or suppress, or redirect) the message...
"Setting the user name and passwwdd"
... when using OracleConnectionCacheImpl?
null

This is bug 1317673
null

Does OracleConnectionCacheImpl cache physical or logical db connections?

Hello -
Can anyone tell me if the "cache" in oracle.jdbc.pool.OracleConnectionCacheImpl is of logical or physical database connections?
(My app selectively enables roles (depending on end user) on the connections it gets - trying to determine if I can use OracleConnectionCacheImpl as a data source...)
-- Thanks

Logical connection

NullPointerException with OracleConnectionCacheImpl

I get the following exception from the OracleConnectionCacheImpl.getConnection() method when a number of threads are using the Cache:
java.lang.NullPointerException
at oracle.jdbc.dbaccess.DBError.throwSqlException(DBError.java, Compiled Code)
at oracle.jdbc.driver.OracleConnection.setAutoCommit(OracleConnection.java, Compiled Code)
at oracle.jdbc.driver.OracleConnection.<init>(OracleConnection.java, Compiled Code)
at oracle.jdbc.pool.OraclePooledConnection.getConnection(OraclePooledConnection.java, Compiled Code)
at oracle.jdbc.pool.OracleConnectionCacheImpl.getConnection(OracleConnectionCacheImpl.java, Compiled Code)
at oracle.jdbc.pool.OracleConnectionCacheImpl.getConnection(OracleConnectionCacheImpl.java, Compiled Code)
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Any help would be greatly appreciated.
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What is Interface?? Its hard to run the prog w/o that...

OracleConnectionPoolDataSource creates inactive sessions

Hi,
My customer uses OracleConnectionPoolDataSource and finds that the pooled connection had created a huge number of inactive sessions on the database side.
Any idea why this happens?
Thanks in advance.
Regards,
Sindhiya V.

Hi Hamdy,
The inactivity timeout was configured through the Oracle Enterprise Manager.
We created a Data Source and specified the following attributes on the page.
JNDI Locations
Location: jdbc/USPSTFPDADefaultDS
XA Location: jdbc/xa/USPSTFPDAXADS
EJB Location: jdbc/USPSTFPDADS
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Maximum Open Connections: 10
Minimum Open Connections: 1
Wait For Free Connection Timeout: 5
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Thanks & Regards,
Sindhiya V.

Setting connectionProperties on OracleConnectionPoolDataSource

Hi all,
we are using on our project the SAP Netweaver 2004, Java 1.4 and the Oracle database with the JDBC driver 10.2.0.4. Netweaver as application server supports the use of JNDI datasources.
The configuration is as follows:
Factory: oracle.jdbc.pool.OracleDataSourceFactory
DataSource Type: ConnectionPoolDataSource
CPDS Classname: oracle.jdbc.pool.OracleConnectionPoolDataSource
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Is it possible to set the connection parameters?
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Thanks in advance
Detlef

Change this:
$users = get-aduser -filter {createTimeStamp -gt $date} -Properties * | select samaccountname
To this:
$users = get-aduser -filter {createTimeStamp -gt $date} -Properties * | select -expandproperty samaccountname
Also, you're creating an access rule that only applies to the folder itself (not to the subfolders and files). If that's what you're after, then leave it as is. If you want to apply to subfolders and files, though, change this:
$permission = "$_","FullControl","Allow"
to this:
$permission = "$_","FullControl","ContainerInherit,ObjectInherit","None","Allow"
Let me know if that works (there's a chance you're going to have some issues with Set-Acl, but we'll see about that later)

Statement cache bug in OracleConnectionCacheImpl

Hi,
Did you guys ever try setStmtCacheSize() in OracleConnectionCacheImpl? When I enable statement cache in connection cache, I always get "close connection error". It seems connection.close() did not clean up the statement associating with this conneciton.
This is my code piece:
//occ is object of OracleConnectionCacheImpl
Conection conn1 = occ.getConnection();
doSomeDBWork(conn1);
conn1.close();
Connection conn2 = occ.getConnection();
doSomeDBWork(conn2); <-- SQLException
Thank you
Jason

I found out the problem. The JDBC team should set the stmtCacheSize 0 before reusePooledConnection. This is the only way we can do without phsically close the connection.

OracleConnectionPoolDataSource Problem

I'm Trying to connect a JSP tomcat-based application to Oracle using
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<Context path="/test" docBase="test" debug="0"
reloadable="true" >
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<res-ref-name>jdbc/test</res-ref-name>
<res-type>oracle.jdbc.pool.OracleConnectionPoolDataSource</res-type>
<res-auth>Container</res-auth>
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ctx = (Context) initCtx.lookup("java:/comp/env");
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I have tried to create DataSource instance in the code instead of get it from
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initCtx = new InitialContext();
OracleConnectionPoolDataSource ds = new OracleConnectionPoolDataSource();
ds.setDataSourceName("oracle.jdbc.pool.OracleConnectionPoolDataSource");
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how can
I control maximun number of pooled connections.
Maximum number of dB connections in pool are set using the maxActive parameter.
<parameter>
<name>maxActive</name>
<value>100</value>
</parameter>
Maximum number of idle dB connections to retain in pool are set using the maxIdle parameter.
<parameter>
<name>maxIdle</name>
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ORA-01858: a non-numeric at OracleConnectionPoolDataSource

I have OracleConnectionPoolDataSource. When I run my JSP , I am getting error
java.sql.SQLException: ORA-01858: a non-numeric character was found where a numeric was expected
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What could be the reason?
Thanks in advance

select to_date('ERROR')
ERROR at line 1:
ORA-01858: a non-numeric character was found where a numeric was expectedPlease see (OERR: ORA 1858 "a non-numeric character was found where a numeric was expected" [ID 19182.1]).
Thanks,
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OracleConnectionCacheImpl violating MAX_LIMIT

Hi,
I am using OracleConnectionCacheImpl for conection pooling in my application. I have set the Min and Max limits as 30 and 100 respectively. I am using DYNAMIC_SCHEME for connection pooling.
But whenever there is heavy load on my application the number of conections is exceeding the MAX_LIMIT of 100. So in a way the OracleConnectionCacheImpl does not seem to be taking care of the MAX limit on the number of conections.
And the application reaches to a point where it does n't seem to recover the unused connections. Is it anything to do with the scheme that we are using?
Please help. Thanks in advance ..:-)

JDBC (on a JSP for instance) will usually do the query and close the connection when the command close() is called. However, this doesn't mean that the connection is closed at the database. Since there's no wait, or no resources being used anymore by the connection, the connection goes to INACTIVE state.
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http://bigbird.us.oracle.com:7777/dbadmin/session_test.jsp
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OracleConnectionCacheImpl vs OracleConnectionPoolDataSource

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