Connection to postgreSQL
This document explains the specific aspect of connecting Cocoon to a PosgreSQL Database.
For a general explanation on database connection please refer to the official documentation .
Downloading the jdbc drivers
The jdbc drivers can be downloaded here .
Drop the pgjdbc2.jar file either in $COCOON_HOME/web-inf/lib or $TOMCAT_HOME/common/lib/.
Setting Web.xml
In the $Cocoon_Home/WEB-INF/ directory you will find the web.xml file. Open it and look for this rows
<init-param> <param-name>load-class</param-name> <param-value> <!-- For IBM WebSphere: com.ibm.servlet.classloader.Handler ..-->
here you have to add the following line:
<!-- For PostgreSQL: --> org.postgresql.Driver
Setting cocoon.xconf
search for:
<datasources>
add into this element these lines:
<jdbc name="YourPoolName"> <pool-controller min="5" max="10"/> <dburl>jdbc:postgresql://YourServerName:5432/DB_Name</dburl> <user>YourUsername</user> <password>YourPassword</password> </jdbc>
Setting sitemap.xmap
When you want to use the connection you just call the jdbc name inside the pipeline in this way:
<map:match pattern="sqlquery"> <map:generate src="sql/sqlquery.xml"/> <map:transform type="sql"> <map:parameter name="use-connection" value="YourPoolName"/> </map:transform> <map:transform type="xslt" src="../stylesheets/transformation.xslt"/> <map:serialize type="svg2jpeg"/> </map:match>
Obviously you have to adapt this sample to fill your need.