how-to configure mysql pool connection on Solr Server

[Miguel]

Hi

 I need configure a mysql pool connection on Solr Server for using on 
custom plugin. I saw DataImportHandler wiki: 
http://wiki.apache.org/solr/DataImportHandler , but it's seems that 
DataImportHandler open the  connection when handler is calling and close 
when finish import and I need keep opening pool to reuse connections 
whenever I need them.

I not found on documentation of Apache Solr how-to define a pools 
connection to DB for reusing them on whatever class of solr.
Any ideas?

thanks