Based on the previous parts of this tutorial (1, 2, 3) we will modify the application and Glassfish to connect to PostgreSQL or Oracle as DB.
Glassfish lib folder
In part 1 of this tutorial we created an EJB using Netbeans and Visual Paradigm, in part 2 a little ZK application to read data using the EJB. In part 3 we will move away from the Derby DB to PostgreSQL and Oracle DB and challenge ourselves with identifier more than 30 characters, which is an issue for Oracle (yes, it is 2011). We will add columns with more than 30 characters and play with a few different column types (the ones showing up in a normal DB layout).
Updated ERD
pgAdmin is the best GUI you can use to administrate PostgreSQL, unffortunately the Ubuntu default packages still offer only PostgreSQL 8.4 and an older version of pgAdmin III that does not support PostgreSQL 9.0.x. Thanks to Martin Pitt who maintains the latest packages you can run and maintain the latest PostgreSQL versions.
If you run Maverick:
Check here for latest or other releases of Ubuntu.
Thanks to Martin Pitt , who maintains the packages for Ubuntu, nstalling the latest version of PostgreSQL on Ubuntu (Lucid) is nothing more than updating your /etc/apt/sources.list with
deb http://ppa.launchpad.net/pitti/postgresql/ubuntu lucid main deb-src http://ppa.launchpad.net/pitti/postgresql/ubuntu lucid mainplus
apt-get updateand
apt-get installpostgresql-9.0I recommend reading the release notes and he outstanding good postgresql documentation.
I didnt notice for 7 days that the latest version of PostgreSQL DB was released on September 20th 2010 ! Congratulations and a big Thank You to the PostgreSQL team ! Is is wonderful to have such a great product out there.
Did you read yet Part 1 ? If not, I recommend to run through it here.
We started from the scratch with VirtualBox and created a new virtual machine running Ubuntu Server 9.10. The last step was to shutdown the virtual machine. Now it is time to clean up, update our server, finetune the configuration and install JDK and Glassfish.
Continue reading
Using the Netbeans IDE together with Glassfish as application server is quite easy and comes out-of-the box with the Netbeans installer. To install PostgreSQL is not significantly harder to install on Linux (or Windows). Our team uses Ubuntu 9.10, Netbeans 6.8, Glassfish and PostgreSQL 8.4.2. If you work alone, it is usually no problem to develop and deploy locally but once you are embedded into a team, you better ensure that you deploy and test applications in the same environment. Very quick you will have Ubuntu updating the OS and PostgreSQL and someone might install Glassfish updates or even add optional modules, soon you have as many deployment environments as you have team-members (times 2). The straight forward answer would be to have all working with the same one server running the application server and the DB, but we still need the comfort of a local sandbox playground and in-dependency from being online or in the office. Certainly I do not advocate island development leading to a different codebase and varying DB’s. But after the tutorial you will agree with me our solution is a reasonable approach.
Our approach: We create a virtual server (with VirtualBox) that everyone is running on his/her desktop and also one instance on a central server. One team-member is responsible to create so-called raw virtual images of the server and documents new versions that are deployed to each desktop. Each team-member does nothing but starting the guest Server in VirtualBox (Glassfish and PostreSQL autostarting) and immediately can connect with Netbeans and pgadmin to AS and DB.
Virtual Ubuntu 9.10 Server
Not all developers are familar with setting up Ubuntu Server and VirtualBox, so I compiled this tutorial as a walk-through the necessary steps to get you started witthout knowing too much about the OS nitty-gritty stuff. You want to concentrate on creating your application, not learning to hack the operating system (even I recommend to know as much as possible on Linux).
A remark on the naming: Your desktop or Notebook running VirtualBox is the HOST and the server or OS you run in the virtual machine is the GUEST.
3 more application join the release-fever spreading the last few days:
The installation is not straight forward as a double-click “setup.exe” on Windows. I summarized the steps to get a running PostgreSQL 8.3.x installation on OpenSolaris 2008.11. All done using a terminal session. Commands to execute in green.
