buddhika ariyaratne - Developer IT

Managing two domains in one virtual server [on hold]

- by Buddhika Ariyaratne

I have a virtual server with Windows Server 2012 on which I need to run two applications for two separate customers. Both applications run on GlassFish in port 8080. The applications run on http://localhost:8080/roseth and http://localhost:8080/ruhunu My virtual server provider has given three IP addresses. How can a I assign one address for each application. For example, if a user type www.ruhunu.org, an arbitrary URL , I want to direct to http://localhost:8080/ruhunu and www.roseth.org to http://localhost:8080/roseth.

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Avoiding null point exception in el in JSF

- by Buddhika Ariyaratne

I am developing a JSF application with JPA(EclipseLink 2.0) and Primefaces. I want to know is there any way to avoid null point exception when el calls a property of a null object. I have described the situation. I have Bill class. There may be no or more BillItem objects with a Bill objects. Each BillItem object have Objects like Make, Country, Manufacturer, etc objects. I am displaying several properties of a bill within a single JSF file like this. "#{billControlled.bill.billItem.modal.name}" But if a bill is not selected, or when there are no bill items for a selected bill, the properties accessing in the el are null. I can avoid this by creating new objects for every bill, for example, new make for a new bill item, etc or by creating new properties in the controller itself for all the properties. But that is a very long way and feel like rudimentory. Is there any good practice to avoid this null point exception in el in JSF?

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Task Manager Like App using Java Swing

- by buddhika

I want to how know how to set about writing a monitoring app such as Windows task manager using Java Swing. The main feature I am concerned with is the grid with a graph which get drawn with time. What are the features that I need to accomplish this? (e.g.: Java2D etc).

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Unique number generation with Java Server Faces

- by Buddhika Ariyaratne

I am developing an application for a medical channelling centre where multiple users reserve bookings for doctors with JSF and JPA. A sequence number is unique to the Doctor, Date and Session. I tried to get a unique sequence number from counting the previous bookings and add one, but if two requests comes at the same time, two bookings get the same number causing trouble to functionality. How can I get unique number in this case? Can I use an application wide bean to generate it? (I thought it is not practicle to get the unique number from the database sequence number as there are several doctors, sessions and daily they have to have different booking number.)

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Netbeans 7.2 not starting

- by Buddhika Ariyaratne

I recently installed Netbeans 7.2 beta and it worked fine. Then I installed Netbeans 7.2 final release on top of beta and during the installation, Netbeans 7.1 and Netbeans 7.12 were there. Now when I launch Netbeans, it does not go beyond "loading modules" stage. Simply the Netbeans screen disappear few seconds after the launch. Then I did the following. Uninstalled all the Netbeans versions and re-installed Netbeans 7.2 Deleted AppData/Netbeans folder Deleted User/.nbi folder Searched the registry and deleted Netbeans related entries. (But only one entry was found) Deleted Netbeans Folder in Program Files folder. Uninstalled and Re-installed in a separate drive. Uninstalled and Re-installed under another user account. None of the above worked, the only thing I did not try was to re-install the Windows XP operating system. It there any option to try before re-installing the operating system?

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