[javaee-spec users] Improving data-source element with facility for vendor specific pool settings?

From: arjan tijms <>
Date: Mon, 9 Feb 2015 22:37:34 +0100

In Java EE one can use the data-source element in web.xml, ejb-jar.xml
and application.xml to define a data source.

The Java EE XSD defines a set of standardized properties, and a
general property element for vendor specific properties.

Though the XSD doesn't separate them in any way, the standardized
properties actually belong to two different groups:

1. Properties for the datasource, such as url, user and password
2. Properties for the connection pool, such as initial-pool-size,
min-pool-size and max-pool-size

The general vendor specific properties via the property element
however seem to be intended for the datasource only. There's no
element available to set vendor specific properties on the connection
pool. In practice there often are such options. Just as an example
JBoss has things like:

* check-valid-connection-sql
* use-strict-min
* flush-strategy


Other servers have similar properties for their connection pool and/or
other ones.

So what about adding a new child element to the data-source element:

<pool-property> with the same <name> & <value> child elements as
<property> currently has.

This new element could then be used to set vendor specific properties
on the connection pool.


Kind regards,
Arjan Tijms