How do I integrate ZeroMQ library with Matlab. I want my Matlab program to be a subscriber of ZeroMQ publisher.

How do I integrate ZeroMQ with Matlab. I would like my Matlab program to be a subscriber of ZeroMQ message, which is a publisher. Thank you.

Answer 1

[Will Grant]

From this blog post, it appears that the usage of JeroMQ (a pure-java implementation of ZeroMQ) is the easiest route to go.

1. Clone the repo from https://github.com/zeromq/jeromq

2. Install maven

3. get into the repository root and build with

mvn package

4. Put the .jar file [somewhere]

5. Add [somewhere] to your javaclasspath

6. Import the package and enjoy!

Edit

Adding the following useful links with example matlab code

http://stackoverflow.com/questions/38060320/how-to-use-jeromq-in-matlab

http://stackoverflow.com/questions/39316544/getting-started-with-jeromq-in-matlab

Answer 2

[Ivan Kostin]

From this post we can understand that the latest Matlab versions do not work with the latest JDK versions. Only 7 or 8 are supported.

But last version of JeroMQ from gihub seems to use JDK with version >=9. Because after I ran the example from git I got exception like this:

java.lang.NoSuchMethodError: java.nio.ByteBuffer.clear()Ljava/nio/ByteBuffer; 
    at zmq.Signaler.send(Signaler.java:134)
    ...  

I wonder if anyone has solved the JeroMQ in Matlab problem. Seems impossible.

[Anil GURSES]

It is not impossible. You need to change your default JDK to 1.8 and compile it again with the command below.

mvn clean package 

I tested this on Matlab R2022a and it works fine. If that doesn't work somehow, just change the compiler properties inside the pom.xml from 8 to 1.8(It's the same thing but give it a try). Lastly, add this to properties

<maven.compiler.release>8</maven.compiler.release>
or
<maven.compiler.release>1.8</maven.compiler.release>