Subscription defined in extension doesn't work

Hi, 

I created a extension according to the tutorial, https://developer.thingworx.com/en/resources/guides/eclipse-plugin-thingworx-extension-development-tutorial.

Most of the functions works , except the subscription. The event "BadWeather" is raised(the application log confirms it) , but  subscription is NOT triggered. 

Could you help ?  I attached the java source code and the extension file , as well as the log files.

================update======================================

I changed the method this.dispatchEvent(event); to this.fireEvent(eventDefinition, DateTime.now(), eventData); , then I found the application log shows that the event handler is triggered  .

However, the event handler/subscriber requires the signature "InfoTable" which doesn't match the data type of eventData of fireEvent, which is "ValueCollection".   So the workaround still cannot work. 

Thingworx version: 8.3.4

Regards,

Sean