Skip to main content

Hardcore DevOps:Building A Portable Weblogic Client on the CLI

It shouldn't be that difficult to build a standalone Weblogic WS-Security enabled client for invoking JAX Web Services, but the reality is that it is. Let's find out why.

What is recurring in the above passages is 'classpath' and the need for the Weblogic Server libraries to be available to it.Thing is I don't want to go through setting up a WebLogic instance just to get  to those libraries, or build a client that depends on the classpath as well as the machine's or host OS's intricacies.Furthermore, any setup would have to be multiplied by 10, the number of machines looking to access the same web service.
In any case my Java client should always call into a Weblogic, well, 'client' library in order to consume the necessary functionality.Turns out that choosing the appropriate one is convoluted:

Do I need wlfullclient.jar, wlthint3client.jar, wlclient.jar, wljmsclient.jar, wlclient.jar, or maybe wlsafclient.jar? Also, don't forget wljmsclient.jar, wljmxclient.jar and wseeclient.jar.Spoiler alert, the one I used was wlsafclient.jar.
Terminology is not of much help either.You see, the manuals use the term 'standalone client' in a vague way, as in the JAX-RPC section we saw earlier, with The stand-alone client JAR file does not, however, support invoking Web services that use the following advanced features.But what is meant by that;is it referring to the 'standalone' Java 'client' I'm looking to build? Turns out that by 'client' is meant the jar that my Java client should call into in order to invoke the web service.In JAX-RPC's occasion this is wseeclient.jar.
But from now on and for the purposes of this article, 'client' will always mean 'my Java client' in either source or packaged form.

Where it all began

What prompted this quest was being handed a copy of a program's source, aka the 'client', that invokes a message level WS-Security Weblogic powered web service.This client software is expected to be receiving HL7 messages from another application and forward them to the Weblogic (JAX-WS) service.This setup then had to be replicated across 10 CentOS Linux production machines.eing

Going back to square one I wasn't particularly fond of this replication and the technical glitches I might have to confront.Instead I needed a solution able to work anywhere and under any environment with the minimum requirements possible, something that mostly boiled down to locating and importing the necessary library dependencies at runtime in a portable way.In other words, take care of those pesky import statements:

full article on i-programmer


Popular posts from this blog

How Much Gameplay Can You Pack In Just 13K?

Given our expectations of Xbox games, you might consider writing a game within a 13K limit, which is the challenge for the annual js13K competition far too restrictive. Its results are now out and prove that it is possible to produce a game that is fun to play. 

Back in the tape loading days and on platforms the likes of Commodore64 games came in sizes of 4K or less. As proof of concept, here's a list of a few such 4K titles, copied over from Lemon64 's archive:
Alien SidestepBug CrusherDot GobblerClose EncountersDot Gobbler v2GridrunnerLaser CyclesMarios BrewerySpace ActionSpace RicoshayTank WarsHesmon64Retro Ball  Fast forward to now, at a time when Javascript's eating the world by making all sorts of applications or  games available to everyone through the medium of the browser, rendering the need of dedicated platforms and Operating systems obsolete, 13K is sufficient enough to pack both gameplay AND cool graphics due to the advanced browser engines and HTML5.

Hour of Code 2017 Introduces App Lab

t's the time of year when the world-class Hour of Code once more commences; just an hour for introducing coding to the uninitiated, having them complete self guided tutorials. But is a hour sufficient? What can a beginner actually code within this limit? The answer is a bit more complicated than that, so let's find out all about it! Integrated into the larger, worldwide, annual Computer Science Education week, this year taking place December 4-10, Hour of Code's novel mission has always been to get everybody coding, aged from 4 to 104, by providing: "a one-hour introduction to computer science, designed to demystify code, showing that anybody can learn the basics, and broadening participation in the field of computer science". But first of all, why this obsession with Computer Science, in particular in getting  kids as young as 4 to learn to code? The answer is simple. Nowadays code is everywhere around us, from desktop computers to mobile phones and, thanks to w…

3D Face Reconstruction with Neural Networks applied to Art

In yet another AI breakthrough, researchers from the University of Nottingham Computer Vision laboratory, have managed to transform 2D facial images to their 3D counterparts in a most productive and efficient way and have made the project available for the rest of us to enjoy. The best part is that it can even work with Art such as historical portraits and pencil sketches. Scientifically the process of mapping facial pixels to 3D coordinates falls within the realm of 3D face reconstruction and is one of the most difficult problems that Computer Vision and Graphics research is trying to solve.
full article on