Connection pool difference in weblogic 8.x and 9.x

Question

Hi All,
Can you please tell me why connection pool has added inside data souce from weblogic version 9.x onwards (as we know weblogic 8.x it was separte) ,recently I have faced this question from interviewer .
Thanks in advance
Balaji kumar
Edited by: user9284716 on 13 Oct, 2010 8:11 AM

Answer 1

1. My guess is for simplifying the config.xml file.
2. Have you worked on both 8.x and 9.x or 10.x WLS versions and Domains? See below notes.
3. In 8.x, under domain we just had huge config.xml file that has all the details of that domain including servers, cluster, managed servers, ConnectionPools, DataSources. Specially we created ConnectionPool that went into one section. Then create one or many Datasources wth different JNDI names that refer to above connection pools etc.
Starting 9.x and 10.x, config.xml file is split into multiple folders, if you have seen. Now under domain root folder, we see a new folder called config. And config folder has lot of sub-folders specially like jdbc. Now jdbc folder is the one having .xml file for each DataSource that you create from weblogic console. Now this .xml file itself have connection pool details also. REMEMBER that you can still have multiple Datasources for the same connection pool and they all still go under same .xml file itself. So indirectly its like one connection pool will have one .xml file and this .xml file itself will have one or many datasources with diff JNDI name that refer to same connection pool. Something like this:
<?xml version="1.0" encoding="UTF-8"?>
<jdbc-data-source xmlns="http://xmlns.oracle.com/weblogic/jdbc-data-source">
<name>portalDataSource</name>
<jdbc-driver-params>
<url>jdbc:pointbase:server://localhost:9093/weblogic_eval</url>
<driver-name>com.pointbase.jdbc.jdbcUniversalDriver</driver-name>
<properties>
<property>
<name>user</name>
<value>WEBLOGIC</value>
</property>
<property>
<name>databaseName</name>
<value>jdbc:pointbase:server://localhost:9093/weblogic_eval</value>
</property>
</properties>
<password-encrypted>{AES}BCjbW4pXK8wCWQ+AESqJd9BDAdmusVFn1tRWdeZFurU=</password-encrypted>
</jdbc-driver-params>
<jdbc-connection-pool-params>
<initial-capacity>5</initial-capacity>
<max-capacity>20</max-capacity>
<test-connections-on-reserve>true</test-connections-on-reserve>
<test-table-name>SQL SELECT COUNT(*) FROM SYSTABLES</test-table-name>
</jdbc-connection-pool-params>
<jdbc-data-source-params>
<jndi-name>weblogic.jdbc.jts.commercePool</jndi-name>
<jndi-name>contentDataSource</jndi-name>
<jndi-name>contentVersioningDataSource</jndi-name>
<jndi-name>portalFrameworkPool</jndi-name>
<global-transactions-protocol>OnePhaseCommit</global-transactions-protocol>
</jdbc-data-source-params>
</jdbc-data-source>
5. Since entire Weblogic Console UI itself is changed from 8.x to 9.x, they have rewritten the way these things are configured and separated into multiple folders. I would say for more simplicity and easy maintenance.
Thanks
Ravi Jegga