jeromq

问题 Scenario : We were evaluating ZeroMQ (specifically jeroMq ) for an event driven mechanism. The application is distributed where multiple services (both publishers and subscribers are services) can exist either in the same jvm or in distinct nodes, which depends on the deployment architecture. Observation For playing around I created a pub / sub pattern with inproc: as the transport , using jero mq (version :0.3.5) The thread publishing is able to publish (looks like getting published, at

问题 Simple question. Why "porting" zmq on java and call it JeroMQ is good idea? 回答1: JeroMQ is an official project of the ZeroMQ community; it's a full port of the C++ libzmq library, supporting version 3.2. Advantages: Pure Java, so no need to link in C/C++ via JNI. This is extremely helpful on devices where native libraries are difficult or impossible. 100% compatible with the JZMQ API (the two projects agreed on a single API so you can import one or the other transparently). 100% compatible

问题 I checked source code of ZMQueue class from JeroMQ which implements Runnable interface looks like: private final Socket inSocket; private final Socket outSocket; public ZMQQueue( Context context, Socket inSocket, Socket outSocket ){ this.inSocket = inSocket; this.outSocket = outSocket; } @Override public void run(){ zmq.ZMQ.proxy( inSocket.base(), outSocket.base(), null ); } As you can see inside the run() only one statement is there, i.e. calling a ZMQ.proxy() - what happens here? And in

问题 I've used ZeroMQ in the past with with JVM applications via the jzmq library. I am planning on using zeromq on a new project where some of the services are implemented on the JVM. I just discovered jeromq, a pure java implementation of zeromq, and I would like to use it mostly since it is tracking zeromq 3.x and it removes the headache of dealing with jzmq . However, I can't tell from the repo page if it is production ready. Does anyone have experience with jeromq in production? 回答1: As the

问题 Using ZeroMQ .Context and .Socket instances, I am able to push/pull messages for example below my code for a Queue like setup: ZMQ.Context context = ZMQ.context(1); // Socket to send messages on ZMQ.Socket sender = context.socket(ZMQ.PUSH); sender.bind("tcp://*:5557"); // Send messages sender.send("0", 0); ZMQ.Socket receiver = context.socket(ZMQ.PULL); receiver.connect("tcp://localhost:5557"); // receive messages String string = new String(receiver.recv(0)).trim(); My questions are : Q1: How

问题 I'm new to zeromq and not that experienced with sockets. Are ZeroMQ sockets supposed to only allow one socket to bind() to a port? The jeromq implementation allows more than one; pyzmq does not. Who's correct? The jeromq ZMQ.Socket.bind() function eventually comes down to this: https://github.com/zeromq/jeromq/blob/master/src/main/java/zmq/TcpListener.java#L141 // Set address to listen on. public int set_address(final String addr_) { address.resolve(addr_, options.ipv4only > 0 ? true : false)

问题 jeromq is a Java implementation of libzmq. I have a .jar file created from the jeromq source. However, I'm unable to call a class in jeromq from MATLAB. I've used addjavaclasspath and addjavalibrarypath but am still not able to get it working. Does anyone have a simple working example in MATLAB? 回答1: I've added the answer here as for reference in case anyone else is interested. % Author : Dheepak Krishnamurthy % License : BSD 3 Clause import org.zeromq.ZMQ; ctx = zmq.Ctx(); socket = ctx