Implementing composite and atomic service code

the project use the google calendar API to get the user event and read the location of the event and give to waze service or google map to get the destination and time to arrive from the location of the user and the location of the event . i need to : A: Design the Controller and Model classes required for the atomic and composite services . B. Implementing your composite and atomic service code. At this stage you need to start actually implementing the code inside your GET and POST methods. Here you can write Java code that invokes model classes and other controllers locally inside the project code. But you should also show how you invoke third party APIs through the Apache HTTP client or the REST Client provided by your third party provider.