Newbie java - rpc question

we have the following situation: old server written in C++ running on a defined set of platforms, using rpc to expose its services. modifications of the server should be avoided. what would be the best way to access rpc from java? as I see it (and considering a defined and small set of platforms) implementing rpc calls in C-functions and calling them from java would be a good solution. are there any better ways?
thanks in advance
milan

thanks.
I have one more question regarding this configuration:
lets say, i have already developed rpc-enabled-classes. now, if i would like to use these classes in a servlet/jsp-based layer running on a different machine (with a possible firewall between them) then I would implement an RMI server executing rpc-classes and access those classes from servlet/jsp over RMI, right?
my first idea was to use EJB with rpc-classes, but EJB do not support native methods.
are there any alternatives to this?

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Hello board! Have a Java Servlet question for you.
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Can I post here(Acrobat Windows) Java Script questions here?

Hello
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Newbie's java function question

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You can convert the ascii value to a character by simple casting.
example:
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int b = (int) a;
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int c = 97;
char d = (char) c;
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I would appreciate any suggestions to be able to handle an empty string within the code above.Not sure if I understand you correctly.
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Ok, so I have to write a method that takes a positive
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Importing Java Class Question

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Hi Folks,
I am new to this forum, heard that interesting discussions always happens on this forum so immediately registered,don't want to miss any oppurtunity to participate in discussions.
I have pretty much basic question regarding compiling and exceuting files in different packages.I have the following directory structure
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com\wdpro\commerce\common\exception has java files with appropriate package name.
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Exception in thread "main" java.lang.NoClassDefFoundError: com/wdpro/commerce/common/crm/dae/nautilus/adapter/
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dpro/commerce/common/exception/*.java com/wdpro/commerce/common/util/*.java com/wdpro/commerce/common/dls/exce
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XP Newbie Java P. & JRE Confusion Updates & Error

Hi!
I posted this in TechArena, and received a post in reply that suggested I should post here instead...
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Plzzz write prog to this simple java threads question

Write a program in C to create four processes. The original processes creates
two children before it prints out "PARENT". The children processes print
"CHILD1" and "CHILD2" respectively. The first child process creates a child
process that prints out "GRANDCHILD".
Note: The output must be guaranteed to print out in the following order each
time it is executed:
GRANDCHILD
CHILD2
CHILD1
PARENT
a. Write the program using C or C++ and forks to create the children processes.
b. Write a second program using Java and Threads for the children processes.
The output statements for CHILD1, CHILD2 and GRANDCHILD must come from print
statements in the run method of the thread.

Most people here will not do your homework for you. If you post a reasonable question that shows you've made some effort, and what the results of that effort were, and provides details about what parts you're having trouble with, then somebody will probably provide guidance so that [you can complete the work.

Simple Java Coding Question

I know this is a simple question, but I can't search for the answer to this because it involves syntax that Google and the like don't seem to search for..
I am trying to figure out some Java code that I have found. I would like to know what:
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My first thought was that they meant to look at the position in the array one less (or more) than i (j). But that doesn't seem to be the case. A is an array of Strings, if that matters...
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muiajc wrote:
I know this is a simple question, but I can't search for the answer to this because it involves syntax that Google and the like don't seem to search for..
I am trying to figure out some Java code that I have found. I would like to know what:
a[--i] and a[++j] mean.
It mean increase/decrease the int i/j by 1. This is done before it gets you the value of a[]. for example if i=5 and you said a[--i] it is really a[4] and i is now equal to 4;

Simple Java EJB question.

When it comes to EJB v3 Remote and Local interfaces,
(With JBoss EJB Container Software in mind, for this question,)
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Which is which for
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Edited by: Zac1234 on Jul 21, 2010 5:21 PM

muiajc wrote:
I know this is a simple question, but I can't search for the answer to this because it involves syntax that Google and the like don't seem to search for..
I am trying to figure out some Java code that I have found. I would like to know what:
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It mean increase/decrease the int i/j by 1. This is done before it gets you the value of a[]. for example if i=5 and you said a[--i] it is really a[4] and i is now equal to 4;

Simple Java Sound Question...

Can I draw waveforms while capturing data? If yes, how. If no, why.
Thanks. I need the answer ASAP, please help.

Hi nfactorial,
Can I draw waveforms while capturing data?If you would like to do that in Java you would need to know about how to use the Java language in general and especially about the Java Sound and Java2D APIs.
If yes, how.It would be too much to explain to answer such a general question. A general answer is, you need to use the Java Sound API to capture the data for which a waveform should be drawn. The Sound API delivers data as a stream of bytes typically encoded in pulse coded modulation (PCM) format. The data stream has digital samples each representing a level of sound pressure for a certain point in time. The stream of samples in the amplitude/time domain need to be transformed to a spectrum of samples in the amplitude/frequency domain, i.e. a number of PCM samples need to be mapped to the frequencies that should be displayed. This is done with the fast fourier transformation algorithm. Each set of amplitude/frequency values can then be displayed as a waveform by using some line drawing logic. The entire process would need to run constantly, i.e. as bytes are received from the sound data stream transformation and drawing is triggered.
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Java Tutorial
http://java.sun.com/docs/books/tutorial/
Java Sound Documentation
http://java.sun.com/j2se/1.5.0/docs/guide/sound/index.html
Java Sound API Programmer's Guide
http://java.sun.com/j2se/1.5.0/docs/guide/sound/programmer_guide/contents.html
Java Sound Resources
http.//www.jsresources.org
Java 2D Graphics Tutorial
http://java.sun.com/docs/books/tutorial/2d/index.html
Wikipedia on fast fourier transformation
http://en.wikipedia.org/wiki/Fast_fourier_transform
HTH
Ulrich

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Hallo,
to the following pgm I had question:
static void printPrimes (int max) (= wavy bracket;
boolean(should be angular brackets) sieve = new booolean (angular br max+1
angular br)
int i,j;
for (i=2; i = max;i++)sieve(angluarbr i angular br)= true
i= 2
while (i= <= max;) (=wavy bracket Out.println (i+ " "); // is prime
for (j=i; j <= j+i) sieve(angular br j angularb.) = false;
while (i <= maxAmpersandAmpersand !sieve (angular br angular br)I++;
) wavy br ) wavy br.
I hope this is still kind of readable.
Q's are:
after the first "for" there is a new i=2, which seems to staty at 2 all the time; the following while does not change this value ( the beginning for i++ does not change this) and so seems to print 2 at all times (??)
then the inner loop seems to count up all the doubbles of the new prime number and thrwoes it out as false at the end of it;
the i values (increased with i++ seemsto refere at all times to the unit numbers and only indirect to the un it values, which are written/ assigned to it (??)
I seem to wonder how the pgm can print out anythings else the 2's.
I would appreciate any help to that.
ml
griz

I hope this is still kind of readable.No, it's not. http://forum.java.sun.com/help.jspa?sec=formatting
Why are you omitting the braces and brackets? And why don't you type "program"? Aren't we worth the additional time it takes?
Q's are:
after the first "for" there is a new i=2, which
seems to staty at 2 all the time; the following
while does not change this value Why should it? You don't tell it to.
( the beginning for
i++ does not change this)It does. It just gets re-set to 2 after the for loop-
and so seems to print 2 at
all times (??)Yeah. What else?
then the inner loop seems to count up all the
doubbles of the new prime number and thrwoes it out
as false at the end of it; That part is definitely unreadable.

Getting Started with Flex and Java RPC for Free?

Good Morning,
Please forgive me if this is the wrong place to post- I'm
just having trouble wrapping my head around what is and what isn't
available for free in the Adobe Flex world.
I've been working on an application for the last few months
using Open Laszlo (
http://www.openlaszlo.org/),
but I've been running into frustrations with their lack of
up-to-date documentation, and I've found it difficult to bring new
people into the project, since the set of users who know it is so
small.
While I do like that I can compile to DHTML, that's not
enough to hold me there.
I've been looking into Adobe Flex, and it seems like a good
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I use Eclipse currently, so having a plugin for it sounds
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everything points to Flex Data services, which is now part of some
larger package costing tens of thousands of dollars.
I don't need advanced messages, or data synchronization, as
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Flex.
I see the forum message that asks
"How
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broadly. Given that the message is from over a year ago, I thought
it would be better form to start a new topic, than replying to it.
Can someone explain to me what components I'd need, both on
the client side and the server side?
Is there a set of manuals that explain how to do Flex RPC
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Can Flex compile to any versions of flash earlier than 9?
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Do I want to start using Flex 2, or Flex 3? Are the
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Finally, where can I purchase the Charting components? The
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this
overcome a decent price barrier.
Thank you for any insight you can offer, and direction you
can provide.

quote:
Originally posted by:
cunparis2day
On our project they made a proxy in java where they passed in
the name of the method as a string, and an array of objects for the
parameters. The proxy then sent the request via RMI and returned
the result. Kind of a hack but they say it worked (I wasn't here
when they did it).
What did the RMI talk to? Are there docs on this?
quote:
Another approach, generate the proxy from the java
interfaces. Or better yet, generate it dynamically with CGLIB.
quote:
Finally, I'm investigating using Mule for the integration.
Let me know what you think about those suggestions.
We have our own messages, but how would MULE translate them
to Flex?
You know quite a bit more about this, can you take a step
back, and explain?

Newbie java - rpc question

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