JNI / external programs / big apps

Hi. We want to develop a hotel management software using Java Web Start and have a few short questions:
1. Is it possible to use JNI in Java Web Start programs for platform-specific functions? For example to access external harware on the serial port of a windows computer.
2. Is it possible to start external Windows .exe programs from within a Java Web Start program? Like the PDF-Viewer for example.
3. How well suited do you think are Java Web Start programs for bigger applications like our hotel management software? Our software consists of a reservation planner, a content management, has massive database access, multi language support, interfaces to telephone systems, etc. I'm a bit worried about the speed of the application...
thanks for your answer!
Beeli

Hello!
1. It is possible to use JNI using JWS, see <nativelib> tag.
2. I think it is possible to run native programs if you grant the permissions. See <security> tag.
3. JWS consumes time to download the application (and its updates) at the start. But when the application is running JWS doesn't change the speed of your application. Even though you've got massive database queries...
Arno

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- I dont really understand what you need.
Sorry I mean: I want to enD my calling program meanwhile
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I found this article rather helpful:
http://www.javaworld.com/javaworld/jw-12-2000/jw-1229-traps.html

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Hi,
sorry for the unspecific title, I couldn't think of a better summary.
The problem is this: I have written a script to encode a DVD to H264 and Vorbis. Since it basically just performs some (OK, by now: A lot of.) management and then calls a external programs, Bash was the obvious choice.
However, the administrative stuff the script does (evaluating user input, calculations etc.) was already a nightmare to code in Bash (lack of arithmetic, lack of data types, proper functions, lack of c-like structs etc.), and I now want to make it even more flexible in what the user (me) can ask of it (it's also going to use a config file, which is another thing that gets ugly fast). Frankly, I can't stomach that.
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I second what peets said. Perl is definitely you're best option here, in my opinion anyways. It has the best (by which I mean easiest) system interface of any scripting langauge I've worked with, and if you want a simple configuration file reader, perl's regex'es are king. Perl also takes a lot of features from the shells, such as the file test operations. If the project get's really big and hairy though, it might be worth considering python as a cleaner, stricter alternative.
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With Regards
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I think your only option might Merapi, and that might only be for linking AIR and Java apps.
http://merapiproject.net/
If this post answers your question or helps, please mark it as such.
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www.ChikaraDev.com
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I can't download any external programs.It used to work fine before.I had downloaded skype few months ago and then it suddenly dissapeared.When i tried to download firefox,chrome,skype etc it downloads as .dmg extension.I drag it to applications folder.Nothing happens after that,can see the download but w/o the logo of skype etc.I followed one suggestion..went to library>preferences>deleted the .psp lock file>emptied trash>downloaded skype again but still the same.
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Hi Fonsi!
One way to execute an external program is to use the System Exec.vi. You find it in the functions pallet under Communication.
/Thomas

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Hi,
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Attachments:
system_exec.GIF ‏8 KB

Hi Fonsi,
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A better way maybe to approach this though ActiveX. Please look at the following example that uses ActiveX to communicate with Excel.
Writing Rows to Excel 97 and Excel 2000 Using ActiveX
If you are not familiar to ActiveX and LabVIEW, please read the document below:
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I hope this
helps.
Sincerely,
Feroz
National Instruments

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Thanx,
Art.

with Runtime
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[/code[

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JNI / external programs / big apps

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