zeromq

I am trying to implement a simple message passing between two applications using NetMQ (a slightly more elaborate description of what I am trying to achieve is below). After a bit of trial and error I've found that I can't just send or receive messages right away after a Connect/Bind calls, since they are non blocking and actually return even if the connection hasn't been established yet. For now I solved this with Thread.Sleep(), but this has a bad taste to it and definitely a no-go for a production system. So the question is, how's one supposed to do it in NetMQ/ZeroMQ? Client example: using

Is it possible to get the total count of subscribers from a PUB socket in zeromq? Thanks! Yes, but unfortunately not via any simple property or method. You need to use the zmq_socket_monitor() function to connect an inproc service socket to the main socket you want to observe. From there you can listen to events regarding connect/disconnect and keep your own count of subscribers. It may not be a trivial task though, since it seems (to me at least) a bit hard to know when to consider a subscriber (or any remote connection) to be up/down (closed/disconnected/retry etc.). You will have to play

I wanted a feedback on whether my evaluations and concerns are correct. I have been reseaching the three, Data Distribution Service, AMQP and ZeroMQ for sometime now for building a data transport layer in a datacenter. All the three look promising, yet i encountered some blocking issues in few. To give a context, my requirements are: Scale upto 500+ physical nodes, 1000+ publishers and subscribers. Support durable delivery of messages to take care of failing subscribers. The aggregated throughput should be north of 1 Million messages / sec Problems with AMQP: The Broker architecture seems to

一、环境搭建 wget http://download.zeromq.org/zeromq-2.1.7.tar.gz tar -xzf zeromq-2.1.7.tar.gz cd zeromq-2.1.7 ./configure make sudo make install git clone https://github.com/nathanmarz/jzmq.git cd jzmq ./autogen.sh ./configure make sudo make install 如果没有安装libtool、libuuid-devel则需要先安装，否则安装失败 yum install libtool yum install libuuid-devel 常见问题： 出现java.lang.UnsatisfiedLinkError: /usr/local/lib/libjzmq.so.0.0.0: libzmq.so.1: cannot open shared object file: No such file or directory异常 原因是未找到zmq动态链接库。 解决方法1：export LD_LIBRARY_PATH=/usr/local/lib 解决方法2：编辑/etc/ld.so.conf文件，增加一行：/usr/local/lib。再执行sudo

I am working on MT4 and used wrapper mql4zmq.dll as given in link https://github.com/AustenConrad/mql4zmq As I have followed all instruction and successfully loaded DLL as well as lib file at specific locations from pre-compiled. But it can not bind or connect with socket through zmq_connect(,) or zmq_bind(,) . Please some one help me to solve this problem. I am posting my code here // Include the libzmq.dll abstraction wrapper. #include <mql4zmq.mqh> //+------------------------------------------------------------------+ //| variable definitions | //+-------------------------------------------

I'm trying to install zeromq.node using: $ npm install zmq However, I keep getting the error below. Any help would be much appreciated. gyp ERR! build error gyp ERR! stack Error: `make` failed with exit code: 2 gyp ERR! stack at ChildProcess.onExit (/usr/share/npm/node_modules/node-gyp/lib/build.js:215:23) gyp ERR! stack at ChildProcess.EventEmitter.emit (events.js:91:17) gyp ERR! stack at Process._handle.onexit (child_process.js:674:10) gyp ERR! System Linux 3.2.0-29-generic gyp ERR! command "node" "/usr/share/npm/node_modules/node-gyp/bin/node-gyp.js" "rebuild" gyp ERR! cwd /home/robot/code