Servlet communication with Java App.

Hi currently I am working on a project in which with the current design I have to implement a servlet, which can communicate to other servlets and/or Java applications via calling their methods. I know that RMI would be ideal for this however, I do not want to have to setup or configure anything on the server end. Another approach I thought of was to extend the abilities of the servlet and Java app to communicate at the "socket" level, however this can cause issues when communicating through a firewall , I am sure there are workarounds. The last thing that I thought of was having the servlet and application communicate via the HTTP protocol and using HTTPMessage to pass arguments. This approach seems to be the easiest but I would have rather liked to access the Object methods of the two applications rather than send args back and forth. Again as mentioned technologies like RMI and CORBA would probably benifit me. While I don't know too much about CORBA I do know that RMI would require administration work which I would not like to deal with mostly b/c of paperwork and red tape.
Any advice would be appreciated.
thank you,
Peyman m.

HI,
I think if your client is RMI, then you need to have RMI server running to answer that client.
While here you have servlet as your server side component. So, I think in its orginal form servelet can not reply to RMI implelemnted client.
The best approach I feel for the situatioin described by you is using java based HTTP classes.

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I want to pass along a couple of tips that will get you more and better response on this list.
1) There is an un-written rule that says more "stars" is better than just one star. Giving a one star rating will probably eliminate that responder from individuals that are willing to anser your question.
2) If someone gives you an answer that meets your needs, reply to that answer and say that it worked.
3) If someone suggests that you look at an example, DO IT! LV comes with a wonderful set of examples that demonstate almost all of the core functionality of LV. Familiarity with all of the LV examples will get you through about 80% of the Certified LabVIEW Developer exam.
4) If you have a question first search the examples for something tha
t may help you. If you can not find an example that is exactly what you want, find one that is close and post a question along the lines of "I want to do something similar to example X, how can I modify it to do Y".
5) Some of the greatest LabVIEW minds offer there services and advice for free on this exchange. If you treat them good, they can get you through almost every challenge that can be encountered in LV.
6) If English is not your native language, post your question in the language you favor. There is probably someone around that can help. "We're big, we're bad, we're international!"
Trying to help,
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he *,
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Hi all,
I'm at a loss... I've always been under the impression that java is the same no matter where it's running, but I've come across something that surely counters that line of thought. At work, we use a java application from DTI to publish our newspaper. This app works just fine on Mac OS X 10.4.x on PPC Macs, but the same application doesn't work on Intel Macs, also 10.4.x.
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java.io.IOException: null,com.dtint.macutils.AppFile.decode
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Caused by: java.io.IOException
     at com.dtint.macutils.AppFile.decode(AppFile.java:130)
     ... 9 more
Caused by: java.lang.reflect.InvocationTargetException
     at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
     at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
     at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
     at java.lang.reflect.Method.invoke(Method.java:585)
     at com.dtint.macutils.AppFile.decode(AppFile.java:125)
     ... 9 more
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     at java.io.FileInputStream.open(Native Method)
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     at java.io.FileInputStream.<init>(FileInputStream.java:66)
     at glguerin.macbinary.MBFileDecoder.decodeFile(MBFileDecoder.java)
     at com.dtint.macutils.MacFileIO.decode(MacFileIO.java:163)
     at com.dtint.macutils.AppFile_60.decode(AppFile_60.java:94)
     ... 14 more
File Download Time (ms) = 12428
If there are any other logs I can provide, let me know what would be helpful and I'll get them.
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Many thanks in advance!
Jason

Hi all,
I'm at a loss... I've always been under the impression that java is the same no matter where it's running, but I've come across something that surely counters that line of thought. At work, we use a java application from DTI to publish our newspaper. This app works just fine on Mac OS X 10.4.x on PPC Macs, but the same application doesn't work on Intel Macs, also 10.4.x.
The app launches and appears to be working fine, but there's a point where it must download some support files from the server. This is where it breaks with the error:
java.io.IOException: null, com.dtint.macutils.AppFile.decode
The corresponding entries in the console log show this:
java.io.IOException: null,com.dtint.macutils.AppFile.decode
     at com.dtint.macutils.Codec.invoke(Codec.java:96)
     at com.dtint.macutils.Codec.decode(Codec.java:112)
     at com.dtint.install.InstallFile.decode(InstallFile.java:218)
     at com.dtint.install.Download.db2File(Download.java:277)
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Caused by: java.lang.reflect.InvocationTargetException
     at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
     at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
     at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
     at java.lang.reflect.Method.invoke(Method.java:585)
     at com.dtint.macutils.Codec.invoke(Codec.java:91)
     ... 4 more
Caused by: java.io.IOException
     at com.dtint.macutils.AppFile.decode(AppFile.java:130)
     ... 9 more
Caused by: java.lang.reflect.InvocationTargetException
     at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
     at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
     at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
     at java.lang.reflect.Method.invoke(Method.java:585)
     at com.dtint.macutils.AppFile.decode(AppFile.java:125)
     ... 9 more
Caused by: java.io.FileNotFoundException: /Volumes/ChopAdSizeMove.scpt.encoded (No such file or directory)
     at java.io.FileInputStream.open(Native Method)
     at java.io.FileInputStream.<init>(FileInputStream.java:106)
     at java.io.FileInputStream.<init>(FileInputStream.java:66)
     at glguerin.macbinary.MBFileDecoder.decodeFile(MBFileDecoder.java)
     at com.dtint.macutils.MacFileIO.decode(MacFileIO.java:163)
     at com.dtint.macutils.AppFile_60.decode(AppFile_60.java:94)
     ... 14 more
File Download Time (ms) = 12428
If there are any other logs I can provide, let me know what would be helpful and I'll get them.
I've got no clue why this wouldn't work across platforms unless it was compiled for the PPC processor or something, but then wouldn't it either launch in Rosetta or not at all on the Intel? I'm a systems admin, not a programmer, so I've really no idea where to start looking.
What I have done to this point is made sure I'm on the latest Apple-released Java, as well as copied the Java files from the PPC to the Intel to see if there was something there. Nothing makes any difference.
This would be a major coup if I could get this working... does anyone have any thoughts or ideas about getting this to work?
Many thanks in advance!
Jason

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