I use updated Raspbian “wheezy”.

 sudo apt-get update 
 sudo apt-get upgrade)

JAVA and Tomcat (servlet container)

 sudo apt-get install openjdk-7-jdk
 Download Tomcat from http://tomcat.apache.org/download-60.cgi (I use 6.xx version)
 un-archive tomcat eg. to /usr/local/ (you can start tomcat with sudo /usr/locat/tomcatdir/bin/catalina.sh start

Configure tomcat manager application to allow easy deploy of BBQTemp jar file. Add this line to tomcat-user.xml (which locates in tomcat installdir / conf directory.

 <user username="tomcat" password="secretpassword" roles="manager-gui"/>
 

Install WiringPI as instructed in: https://projects.drogon.net/raspberry-pi/wiringpi/download-and-install/

Install pi4j

 wget http://pi4j.googlecode.com/files/pi4j-0.0.4.deb (or the latest snapshot)
 sudo dpkg -i pi4j-0.0.4.deb 
 (this installs the library and examples into /opt/pi4j

Install JDBC Driver to Tomcat http://jdbc.postgresql.org/download.html download the JDBC4 jar and copy it to tomcatdir/lib

Install postgresql server

 sudo apt-get install postgresql
 sudo apt-get install postgresql-client
 edit /etc/postgresql/9.1/main/pg_hba.conf to allow connections from your network 
 (e.g. "host all all    192.168.0.0/24 trust")
 NOTE: if you need to connect database from outside edit /etc/postgresql/9.1/main/postgresql.conf 
 (allow tcp ip connections listen_addresses = '*' for all connections.)	

Setup database and user

 su <enter>
 su postgres <enter>
 createuser -P <enter>
 bbqtemp <enter>
 bbqtemp <enter>
 psql <enter>
 create database bbqtemp owner bbqtemp; <enter> 
 \quit <enter>

TODO DB Table creation... and better way to make bbqtemp users..

To ensure that SPI is enabled on the Raspberry pi

 sudo modprobe spi_bcm2708 
 You can add spi_bcm2708 to /etc/modules for autoloading SPI module on startup
 gpio load spi

Deploy BBQ temp WAR file with tomcat manager web-app