Merge pull request QubitProducts#9 from QubitProducts/zk-errors

Improve ZK error logging when nodes don’t exist

qzk/qzk.go

@@ -136,6 +136,15 @@ func ListenToZooKeeper(config c.Zookeeper, deb bool) (chan zk.Event, chan bool)
 
 func ListenToConn(c *zk.Conn, path string, deb bool, repDelay time.Duration) (chan zk.Event, chan bool) {
 
+	exists, _, err := c.Exists(path)
+
+	if err != nil {
+		logger.Fatalf("Couldn't determine whether node %v exists in Zookeeper", path)
+	}
+	if !exists {
+		logger.Fatalf("Couldn't find node %v in Zookeeper", path)
+	}
+
 	quit := make(chan bool)
 	evts := make(chan zk.Event)
 
@@ -149,3 +158,8 @@ func ListenToConn(c *zk.Conn, path string, deb bool, repDelay time.Duration) (ch
 	}
 	return evts, quit
 }
+
+func nodeExists(c *zk.Conn, path string) bool {
+
+	return false
+}