Subscribe to a Topic

With this task, you will get thisCities to subscribe to the /cb/setValues topic so that it populates with the cities returned from StateBean.

1. Expand the plotCity > Web Pages nodes.

2. Open index.jsp in a editor pane.

3. Add a subscribe attribute to the thisCity widget and give it the topic /cb/setValues, as shown here:

   <a:widget id="thisCity"
   	name="dojo.combobox"
   	subscribe="/cb"
   	value="${StateBean.cities}" />

4. Save the file.

5. (Optional) Run the example by right-clicking the project node and selecting Run.

   Now you can select a state and see the thisCity combobox populate with the names of cities located in that state. With the next task, you'll make it so the application will plot a city on the map when you select the city.