Responder
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- A Responder is a simple abstraction for handling callbacks that have data associated with them.
- The responder has two essential properties:
- It is ref counted so that it gets destroyed when both the responder and the respondee are finished with it
- It has a virtual 'completed' function that is called by the responder and implemented by the respondee
- Simple example:
class LLResponder : public LLThreadSafeRefCount
{
public:
virtual ~LLResponder();
virtual void completed(bool success) = 0;
};
class MyResponder : public LLResponder; // contains private data and overrides completed()
make_a_request("foo", new MyResponder(mydata)}; // when the request completes, MyResponder::completed() will get called