This worked!!!! Thank you so much!! As a follow-up question, I was just curious if you might have a recommendation to me for how I conceptually set up my ZeroMQ system. So I basically want a server that I run that receives and sends messages to two clients. Client1 waits for a message from the Server before it runs for a given time, then sends a message to the Server once it has finished. Client2 waits to receive a message from the Server that it sends once it receives a message from Client1. Then once Client2 receives this message, it runs for a given time and sends a message to the Server to then deploy Client1. And this repeats.
I think I am stuck as to how to do the "waiting" part for both of the clients. Do you have any suggestions? I can't thank you enough for your help. On Fri, Apr 29, 2016 at 12:16 AM, Stephen Riesenberg < [email protected]> wrote: > Looks like you're on the right path now. So -Djava.library.path is what > allows the Java program to find the binary linked library for jzmq. For > reference, -D is a flag that allows you to pass runtime environment > parameters which are available via e.g. > System.getProperty("java.library.path"). > > So for Eclipse, you need two things. > > 1. Set up your program to run with that property (java.library.path) > set, which can be done per program (main) or globally. > 2. Set up your classpath. > > I'm using STS, but should be the same. > > To set your library path for a program, go to Run -> Run Configurations -> > Java Application -> [your program] -> Arguments tab. If you don't have any > programs yet, just right-click your program with a main() and run it. It > gets created automatically even if it has errors. In the Arguments tab, > under VM arguments, add -Djava.library.path=/usr/local/lib. > > To set your classpath, I usually use Maven or Gradle, but if you're > rolling your own custom project with no dependency management, you right > click your project -> Properties -> Java Build Path -> Libraries tab, then > add your jar(s). > > Hope that helps. > > Also, if you want to set up a Maven or Gradle based sample ZeroMQ Java > project, let me know, and I can help with that. It would be a nice repo to > have on GitHub for people like yourself to fork and start coding. > > On Thu, Apr 28, 2016 at 6:24 PM, Sara Rimer <[email protected]> > wrote: > >> Ok, so I ran the >> mvn test >> and it everything was okay. I was originally trying to rebuild some basic >> ZeroMQ programs using Java just to make sure it worked (my preferred >> language is Python). But while the programs would compile, they wouldn't >> run. That is when I went back to looking for tutorials and came across one >> that used local_lat as an example, which thanks to your advice I >> abandoned trying it. >> >> Thus, I retried building hwClient.java and hwServer.java and I finally >> got them to work! My issue was pointing to the correct classpaths (which I >> am not quite used to doing in Java), and also adding in this ( >> -Djava.library.path=/usr/local/lib), but I don't really understand what >> the "-Djava" command does). >> >> Anyway, I had to add the following paths so my command looked like this: >> >> java -cp >> ./:/usr/local/share/java/zmq.jar:/home/sara/Applications/zeromq/jzmq/jzmq-jni/src/main/c++/zmq.jar >> -Djava.library.path=/usr/local/lib hwClient >> >> The Java program that I have built that I am trying to implement ZeroMQ >> with I have built within Eclipse. So I am not really used to working with >> Java via the terminal. Thus, I was wondering how I can I run the command >> above via Eclipse? That is, if you are familiar with Eclipse, how to I add >> these classpaths? >> -cp >> ./:/usr/local/share/java/zmq.jar:/home/sara/Applications/zeromq/jzmq/jzmq-jni/src/main/c++/zmq.jar >> >> And then how do I implement the following command in Eclipse? >> -Djava.library.path=/usr/local/lib hwClient >> >> Thank you all. I appreciate your help. >> >> Sincerely, >> Sara >> >> >> On Wed, Apr 27, 2016 at 9:35 PM, Stephen Riesenberg < >> [email protected]> wrote: >> >>> Sara, >>> >>> While I've done quite a bit of working with jzmq on my local machine, >>> I've rarely run the local_lat program that's used as an example on the >>> documentation page for the java binding. So, I may be off a bit, but I >>> think you would need to build the C++ project in the >>> jzmq/builds/msvc/local_lat to have that class available. Possibly at >>> one time it was included in the jar, but that may have changed and it looks >>> like it isn't any longer. >>> >>> Perhaps try running the following (assuming you have maven installed) in >>> the local directory where you downloaded and built jzmq: >>> >>> mvn test >>> >>> >>> Another option is the JeroMQ test suite, which includes several of the >>> guide examples, which also requires you to download and set up the project >>> locally (using maven). Or skip it and drop these classes into your own >>> project ( >>> https://github.com/sjohnr/jeromq/blob/develop/src/test/java/guide/hwclient.java >>> , >>> https://github.com/sjohnr/jeromq/blob/develop/src/test/java/guide/hwserver.java >>> ). >>> >>> Or try running a minimal example of your own within your own project. >>> >>> Hope that helps. >>> >>> On Wed, Apr 27, 2016 at 7:55 PM, Sara Rimer <[email protected]> >>> wrote: >>> >>>> Hi everyone, >>>> >>>> I am finally getting back to this part of my project. So I think the >>>> issue is that I just can't get ZeroMQ to work with Java on my machine. I >>>> have tried JeroMQ as well. I have been following this guide: >>>> http://zeromq.org/bindings:java and when I try >>>> >>>> $ java -cp /usr/local/share/java/zmq.jar:. local_lat tcp://127.0.0.1:5000 >>>> 1 100 >>>> >>>> I get this error >>>> >>>> Error: Could not find or load main class local_lat >>>> >>>> I think I have just not found a good guide for how to set up ZeroMQ for >>>> Java on Linux 12.04. Any suggestions? >>>> >>>> Thank you. >>>> >>>> Sincerely, >>>> Sara >>>> >>>> On Mon, Mar 28, 2016 at 8:30 PM, Stephen Riesenberg < >>>> [email protected]> wrote: >>>> >>>>> Sara, >>>>> >>>>> How far have you gotten in your effort? Do you have an example class? >>>>> What issues did you run into? What requirements do you have for your >>>>> API? Is it files, or just data you are sending back and forth between >>>>> these >>>>> two environments? >>>>> >>>>> Sorry for so many questions, but I bet with a few details we can get >>>>> you pointed in the right direction. Sounds like an interesting project! >>>>> >>>>> On Friday, March 25, 2016, Sara Rimer <[email protected]> wrote: >>>>> >>>>>> Hello, >>>>>> >>>>>> This is most likely a very basic usage of ZeroMQ, but I am a >>>>>> computational engineer and I am trying to connect a hydraulic model >>>>>> written >>>>>> in C++ to a decision tree model written in Java. I would like to send >>>>>> data >>>>>> files back and forth between the two programs. I am using ZeroMQ for >>>>>> this. >>>>>> And I have gotten ZeroMQ to work via Python no problem (which I am >>>>>> planning >>>>>> on using for my C++ model which I run via a bash script). However, I am >>>>>> having difficulty interfacing it with Java. I was planning on just >>>>>> creating >>>>>> a class in Java that is solely used to interface with ZeroMQ. Does anyone >>>>>> have any suggestions? >>>>>> >>>>>> Thanks, >>>>>> Sara >>>>>> >>>>>> >>>>>> >>>>>> >>>>> _______________________________________________ >>>>> zeromq-dev mailing list >>>>> [email protected] >>>>> http://lists.zeromq.org/mailman/listinfo/zeromq-dev >>>>> >>>>> >>>> >>>> >>>> -- >>>> Sara Rimer >>>> University of Michigan Graduate Student >>>> Department of Civil and Environmental Engineering >>>> [email protected] >>>> [email protected] >>>> 269.483.6334 >>>> >>>> >>>> >>>> >>>> >>>> _______________________________________________ >>>> zeromq-dev mailing list >>>> [email protected] >>>> http://lists.zeromq.org/mailman/listinfo/zeromq-dev >>>> >>> >>> >>> _______________________________________________ >>> zeromq-dev mailing list >>> [email protected] >>> http://lists.zeromq.org/mailman/listinfo/zeromq-dev >>> >> >> >> >> -- >> Sara Rimer >> University of Michigan Graduate Student >> Department of Civil and Environmental Engineering >> [email protected] >> [email protected] >> 269.483.6334 >> >> >> >> >> >> _______________________________________________ >> zeromq-dev mailing list >> [email protected] >> http://lists.zeromq.org/mailman/listinfo/zeromq-dev >> > > > _______________________________________________ > zeromq-dev mailing list > [email protected] > http://lists.zeromq.org/mailman/listinfo/zeromq-dev > -- Sara Rimer University of Michigan Graduate Student Department of Civil and Environmental Engineering [email protected] [email protected] 269.483.6334
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