update sample node to reflect better way to close nodes.

nodes/99-sample.js.demo

@@ -14,38 +14,39 @@
  * limitations under the License.
  **/
 
+// If you use this as a template, replace IBM Corp. with your own name.
+
 // Sample Node-RED node file
 
 // Require main module
 var RED = require("../../red/red");
 
 // The main node definition - most things happen in here
-function SampleNode(n) {      
+function SampleNode(n) {
     // Create a RED node
     RED.nodes.createNode(this,n);
-   
+
     // Store local copies of the node configuration (as defined in the .html)
     this.topic = n.topic;
-   
+
     // Do whatever you need to do in here - declare callbacks etc
     // Note: this sample doesn't do anything much - it will only send
     // this message once at startup...
     // Look at other real nodes for some better ideas of what to do....
     var msg = {};
-    msg.topic = node.topic;
+    msg.topic = this.topic;
     msg.payload = "Hello world !"
-   
+
     // send out the message to the rest of the workspace.
     this.send(msg);
+
+    this.on("close", function() {
+		// Called when the node is shutdown - eg on redeploy.
+		// Allows ports to be closed, connections dropped etc.
+		// eg: this.client.disconnect();
+	});
 }
 
 // Register the node by name. This must be called before overriding any of the
 // Node functions.
 RED.nodes.registerType("sample",SampleNode);
-
-
-SampleNode.prototype.close = function() {
-    // Called when the node is shutdown - eg on redeploy.
-    // Allows ports to be closed, connections dropped etc.
-    // eg: this.client.disconnect();
-}