[zeromq-dev] Java/Windows issues

[Martin Sustrik]

Hi Robin,

> Hi folks. As I've been using 0mq a bit more I've run into a few issues:
> 1 - the mask(Zmq.MESSAGE_GAP) method in Java throws an exception on 
> Windows. Looking at the Java perf examples I don't see this method being 
> called. Any reason this isn't implemented? Its in the Zmq class 
> interface. When I comment out this call to mask the application 
> functions fine. The exception is:
> 
> Exception in thread "main" java.lang.UnsatisfiedLinkError: 
> org.zmq.Zmq.mask(I)V
>     at org.zmq.Zmq.mask(Native Method)
>     at com.st.common.Messaging.<init>(Messaging.java:44)
>     at com.st.common.Messaging.<clinit>(Messaging.java:20)
>     at com.st.gui.ScoutGUI.main(ScoutGUI.java:80)

Ok, there's incorrect prototype for the implementation of the mask 
function. Following patch should help:

Index: libjzmq/Zmq.cpp
===================================================================
--- libjzmq/Zmq.cpp	(revision 1603)
+++ libjzmq/Zmq.cpp	(working copy)
@@ -111,7 +111,7 @@
  }

  JNIEXPORT void JNICALL Java_org_zmq_Zmq_mask (JNIEnv *env, jobject obj,
-    int notifications)
+    jint notifications)
  {
      //  Get the context.
      context_t *context = (context_t*) env->GetLongField (obj, 
context_fid);

> 2 - I have a linux c++ publisher publishing using pgm to multiple java 
> windows clients. The linux client is registering a global exchange and 
> the windows clients register a local queue to that exchange. It appears 
> that after restarting the linux publisher the windows client stops 
> receiving messages until it is also restarted.

Rastart of PGM publisher on win/linux seemed to work when we've did 
1.0.0 tests. We'll have a look at the scenario shortly.

Martin