uc_sensor_node_zmq forwarder

[svn42.git] / go / uc_sensor_node_zmq / zeromq.go

diff --git a/go/uc_sensor_node_zmq/zeromq.go b/go/uc_sensor_node_zmq/zeromq.go
new file mode 100644 (file)
index 0000000..2cbd495
--- /dev/null
+++ b/go/uc_sensor_node_zmq/zeromq.go
@@ -0,0 +1,42 @@
+// (c) Bernhard Tittelbach, 2013
+
+package main
+
+import (
+    zmq "github.com/vaughan0/go-zmq"
+ )
+
+// ---------- ZeroMQ Code -------------
+
+func ZmqsInit(pub_addr string)  (ctx *zmq.Context, pub_sock *zmq.Socket) {
+    var err error
+    ctx, err = zmq.NewContext()
+    if err != nil {
+        panic(err)
+    }
+    //close only on later panic, otherwise leave open:
+    defer func(){ if r:= recover(); r != nil { ctx.Close(); panic(r) } }()
+
+    if len(pub_addr) > 0 {
+        pub_sock, err = ctx.Socket(zmq.Pub)
+        if err != nil {
+            panic(err)
+        }
+        defer func() { if r:= recover(); r != nil { pub_sock.Close(); panic(r) } }()
+
+        if err = pub_sock.Connect(pub_addr); err != nil {
+            panic(err)
+        }
+    } else {
+        pub_sock = nil
+    }
+
+    return
+}
+
+func zmqsHandleError(chans *zmq.Channels) {
+    for error := range(chans.Errors()) {
+        chans.Close()
+        panic(error)
+    }
+}