This week's giveaway is in the Spring forum.
We're giving away four copies of REST with Spring (video course) and have Eugen Paraschiv on-line!
See this thread for details.
The moose likes Other Java Products and Servers and the fly likes Postgres Connection Pool Big Moose Saloon
  Search | Java FAQ | Recent Topics | Flagged Topics | Hot Topics | Zero Replies
Register / Login

Win a copy of REST with Spring (video course) this week in the Spring forum!
JavaRanch » Java Forums » Products » Other Java Products and Servers
Bookmark "Postgres Connection Pool" Watch "Postgres Connection Pool" New topic

Postgres Connection Pool

L'ange Pantoja

Joined: May 30, 2004
Posts: 2
Hi, am trying to learn to deploy a Sun Application Server 8. Had completed the installation and testing of the newly installed App Server. However, my projects need to connect to a PostgreSQL database. As I've tried to play around the application console, I found out that Postgres drivers for connection pooling is not available in the bundled application server.

I've tried to look around the net for resources on how to add these resources into the application server, however to no avail.

How do I go about doing this?
Raj Saini

Joined: Jun 30, 2004
Posts: 2
I am also looking for the same solution. I will come back to you if I succeed (hopefully I would be)
Raj Saini

Joined: Jun 30, 2004
Posts: 2
You keep the Vendor field for the connection pool empty. it does nothing more then populating the datasource implementation class on next screen.

Other options are:

Resource Type: javax.sql.ConnectionPoolDataSource
DataSource class name: org.postgresql.jdbc3.Jdbc3PoolingDataSource

Provide the other details required on third screen. Theya re specific to your installlation of postgreSQL

Fileds are:
ServerName: <your pgsql server ip or FQDN>
port: port number of pgsql or 0 for defaults
username: user name to connect to server
password: password for above user
database: your initial database to connect to

After finishing you can try pinging from newly created connection pool page.

L'ange Pantoja

Joined: May 30, 2004
Posts: 2
Thanx Raj...

My problems have been due mainly to one missing step: placing the postgresql driver into the right domain directory.

Here's how: (assuming that we use pg74.213.jdbc3.jar as our driver)
1) copy the driver file into ${SUN_APP_SER_DIR}/domains/${DOMAIN}/lib/ext
2) start/restart the server (i'm not sure if there's a way to force the server to load the classes while running; but in my experience, when the server started without the classes on the directory, it was unable to load the referred classes... the problem disappeared when i restarted the server)
3) then do as Raj suggested
peter murray

Joined: Aug 09, 2004
Posts: 1
The following works in SunOne App server 8:

Application Servers: ConnectionPoolDataSource

PostgreSQL��� includes one implementation of ConnectionPoolDataSource for JDBC 2 and one for JDBC 3, as shown in Table� 11.1, ���ConnectionPoolDataSource Implementations���.

Table� 11.1.� ConnectionPoolDataSource Implementations
JDBCImplementation Class

Both implementations use the same configuration scheme. JDBC requires that a ConnectionPoolDataSource be configured via JavaBean properties, shown in Table� 11.2, ���ConnectionPoolDataSource Configuration Properties���, so there are get and set methods for each of these properties.

Table� 11.2.� ConnectionPoolDataSource Configuration Properties
serverNameStringPostgreSQL��� database server host name
databaseNameStringPostgreSQL��� database name
portNumberintTCP port which the PostgreSQL��� database server is listening on (or 0 to use the default port)
userStringUser used to make database connections
passwordStringPassword used to make database connections
defaultAutoCommitbooleanWhether connections should have autocommit enabled or disabled when they are supplied to the caller. The default is false, to disable autocommit.

Many application servers use a properties-style syntax to configure these properties, so it would not be unusual to enter properties as a block of text. If the application server provides a single area to enter all the properties, they might be listed like this:

Joe Sal

Joined: Feb 06, 2006
Posts: 13
What exactly does "JDBC requires that a ConnectionPoolDataSource be configured via JavaBean properties" mean? I set this up accordingly, but when I try to connect to the datasource in a message listener (which to tell you the truth I'm not entirely positive you can do), i get the following error:

SEVERE: RAR5099 : Wrong class name or classpath for Datasource Object : {0}
java.lang.ClassNotFoundException: org.postgresql.jdbc3.Jdbc3PoolingDataSource


Any ideas?
I agree. Here's the link:
subject: Postgres Connection Pool
It's not a secret anymore!