[zeromq-dev] Pattern for two clients and one server

[Adriana C]

Hello everyone!

I am new to zmq and I would like to use it in my implementation for IPC.
I have two processes that must send commands to another process. This one
performs
the actual work for the commands. The commands may occur at any time and I
cannot use a continuous loop to send them.
How should I pair the request/reply calls?

The architecture looks like in the attachment. I was thinking of designing
the two
*client *processes using REQ sockets and the *server *process using ROUTER
socket.

I need the communication to be asynchronous, without doing busy waiting.
Also,
each request must be followed by a response, either an acknowledgement or a
data message.

What are your impressions on this? I do not want to start from scratch with
a bad design.
I went through the ZMQ guide but still I am not pretty sure whether this is
the right approach.

Thank you,
Adrianne
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Re: [zeromq-dev] Moving list to Google groups?

[c]

Jim Idle  writes:

I'm a nay on Google Groups. As seen with SourceForge, sometimes the
priorities of companies change. This is especially true for a publically
traded company.

The price points of https://www.mailmanhost.com/pricing/ seem better
than http://www.mailmanlists.net/ but I have no personal experience with either.

> You just add your email address to the google list - you don't
> actually need a Google account. Thre is really no difference to now.

In my experience list maintainers end up needing to enable the Google Account
requirement on their groups to combat spam. 
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Re: [zeromq-dev] some correction on java samples

[C. Huntz]

Le 11/03/2011 20:57, chuntz a écrit :



hello,
i push some corrections about the java sample, and i implement some 
not already written sample;

I hope that will be usefull for you,
regards,
Christophe Huntzinger


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Hello,
I have no answer to mail first e-mail, so may I make some mistakes on 
the way of working with ZMQ dev team. If it is, can you explain me what 
I makes wrong. I apologize whatever.


The patch  pushed is for sure under license LGPL and contains some new 
implementations of the java samples:

/ examples/Java/msgqueue.java
 examples/Java/mtserver.java
 examples/Java/rrbroker.java
 examples/Java/rrclient.java
 examples/Java/rrserver.java
 examples/Java/syncpub.java
 examples/Java/syncsub.java
 examples/Java/wuproxy.java/
and a correction of /MultiThreadedHelloWorldServer /sample.

I focus on the fact that a lot of java samples classes names doesn't 
follow the java naming rules, and may they shall be renamed: 
/msgqueue.java//- /at least///MsgQueue.java/ and the class it contains 
shall be named as well.

Regards,
Christophe Huntzinger
From d2e7113f37a6ce57b44c6c6b31bebc51f9324dd2 Mon Sep 17 00:00:00 2001
From: unknown chuntzin@.(none)
Date: Fri, 11 Mar 2011 20:42:11 +0100
Subject: [PATCH] Signed-off-by: C. Huntzinger chu...@laposte.net

Correction of some issue in MultiThreadedHelloWorldServer.
New implementation of missing ZMQ java samples.
---
 examples/Java/msgqueue.java |   42 ++--
 examples/Java/mtserver.java |   51 -
 examples/Java/rrbroker.java |   75 +--
 examples/Java/rrclient.java |   40 +--
 examples/Java/rrserver.java |   50 +++--
 examples/Java/syncpub.java  |   66 --
 examples/Java/syncsub.java  |   53 --
 examples/Java/wuproxy.java  |   56 ++--
 8 files changed, 312 insertions(+), 121 deletions(-)
 delete mode 100644 examples/Java/mtserver.java

diff --git a/examples/Java/msgqueue.java b/examples/Java/msgqueue.java
index 16bdba5..4535491 100644
--- a/examples/Java/msgqueue.java
+++ b/examples/Java/msgqueue.java
@@ -1,13 +1,35 @@
-No-one has translated the msgqueue example into Java yet.  Be the first to 
create
-msgqueue in Java and get one free Internet!  If you're the author of the Java
-binding, this is a great way to get people to use 0MQ in Java.
+import org.zeromq.ZMQ;
+import org.zeromq.ZMQ.Context;
+import org.zeromq.ZMQ.Socket;
+import org.zeromq.ZMQQueue;
 
-To submit a new translation email it to zeromq-dev@lists.zeromq.org.  Please:
+/**
+ * Simple message queuing broker
+ * Same as request-reply broker but using QUEUE device.
+ * 
+ * Christophe Huntzinger chu...@laposte.net
+ */
+public class MsgQueue{
 
-* Stick to identical functionality and naming used in examples so that readers
-  can easily compare languages.
-* You MUST place your name as author in the examples so readers can contact 
you.
-* You MUST state in the email that you license your code under the MIT/X11
-  license.
+   public static void main (String[] args) {
+   //  Prepare our context and sockets
+   Context context = ZMQ.context(1);
 
-Subscribe to this list at http://lists.zeromq.org/mailman/listinfo/zeromq-dev.
+   //  Socket facing clients
+   Socket frontend = context.socket(ZMQ.XREP);
+   frontend.bind(tcp://*:5559);
+
+   //  Socket facing services
+   Socket backend = context.socket(ZMQ.XREQ);
+   backend.bind(tcp://*:5560);
+
+   //  Start built-in device
+   ZMQQueue queue = new ZMQQueue(context, frontend, backend);
+   // have fun!
+   
+   //  We never get here but clean up anyhow
+   frontend.close();
+   backend.close();
+   context.term();
+   }
+}
diff --git a/examples/Java/mtserver.java b/examples/Java/mtserver.java
deleted file mode 100644
index 206160f..000
--- a/examples/Java/mtserver.java
+++ /dev/null
@@ -1,51 +0,0 @@
-/*
-Multithreaded Hello World server in Java
-
-Naveen Chawla naveen.c...@gmail.com
-*/
-import org.zeromq.ZMQ;
-
-public class MultiThreadedHelloWorldServer {
-public static void main(String[] args) {
-//  Prepare our context and sockets
-final ZMQ.Context context = ZMQ.context(1);
-ZMQ.Socket clients = context.socket(ZMQ.XREP);
-clients.bind (tcp://*:);
-ZMQ.Socket workers = context.socket(ZMQ.XREQ);
-workers.bind (inproc://workers);
-
-//  Launch pool of worker threads
-for (int thread_nbr = 0; thread_nbr != 5; thread_nbr++) {
-Thread worker_routine = new Thread

Re: [zeromq-dev] JZMQ: Problems building on win32 (MS Visual Studio)

[C. Huntz]

Le 15/03/2011 21:00, Michael Compton a écrit :
 Hi,

 I am having problems building jzmq on Win32.

 I built libzmq to output a lib file (libzmq.lib), but when I try
 building jmzq I get around 20 errors of unresolved external symbols for
 what seems like all the functions in libzmq.

 Any suggestions?

 Cheers,
 Michael

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Hi,
I use MS visual Xpress 2008 to do the same stuff without any issue, 2 
weeks ago.
May it comes from your MSV version,
Christophe


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[zeromq-dev] Python / Java interoperability

[Rejali, Marc C - GMRT-GET]

Is there an example showing Java / Python interoperability using tcp ?


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